规划：先安装三台组建集群，然后扩容一个安全节点进来 1、环境： 三台centos7.5 主机 192.168.0.91 192.168.0.92 192.168.0.93 都关闭防火墙 都关闭selinux 配置免密登录，参照：https://www.cnblogs.com/effortsing/p/10060748.html 都配置主机名 sed -i '$ahostname=test1' /etc/sysconfig/network && hostnamectl set-hostname test1 sed -i '$a est1' /etc/hostname cat >>/etc/hosts<< EOF 192.168.0.91 test1 192.168.0.92 test2 192.168.0.93 test3 192.168.0.94 test4 EOF 配置所有主机时间同步(非必须) 都退出xshell重新登录，查看主机名 2、 启动etcd非安全集群 2.1、 安装并启动etcd 在3个节点上安装etcd： yum install -y etcd systemctl start etcd && systemctl enable etcd 使用etcdctl访问etcd并检查其状态验证启动成功。 etcdctl cluster-health member 8e9e05c52164694d is healthy: got healthy result from http://localhost:2379 2.2、 修改配置启动集群 目前这3个节点上的etcd并未形成集群，删除原先配置文件，添加如下参数 etcd1配置 cat >/etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.91:2380" ETCD_LISTEN_CLIENT_URLS="http://192.168.0.91:2379,http://127.0.0.1:2379" ETCD_NAME="etcd1" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.91:2380" ETCD_ADVERTISE_CLIENT_URLS="http://192.168.0.91:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=http://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" EOF etcd2配置 cat >/etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.92:2380" ETCD_LISTEN_CLIENT_URLS="http://192.168.0.92:2379,http://127.0.0.1:2379" ETCD_NAME="etcd2" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.92:2380" ETCD_ADVERTISE_CLIENT_URLS="http://192.168.0.92:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=http://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" EOF etcd3配置 cat >/etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.93:2380" ETCD_LISTEN_CLIENT_URLS="http://192.168.0.93:2379,http://127.0.0.1:2379" ETCD_NAME="etcd3" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.93:2380" ETCD_ADVERTISE_CLIENT_URLS="http://192.168.0.93:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=http://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" EOF 注意：ETCD_INITIAL_CLUSTER 选项决定了通过 etcdctl cluster-health 可以查看到节点的个数 集群的配置信息如节点url，token均存储在数据目录中，这些配置项仅在建立集群时生效。因此当修改已有etcd集群配置时（如新增节点，从http变为https通信等操作）， 并不是简单的修改配置文件就能完成，而是要通过etcdctl的集群管理工具通过复杂的步骤实现 删除成员并启动 systemctl stop etcd rm -rf /var/lib/etcd/default.etcd systemctl daemon-reload && systemctl restart etcd 如果不删除成员目录的话是无法启动的， 注意三个节点要同时启动才可以启动成功 在任意一个节点上使用etcdctl验证集群状态: etcdctl cluster-health [root@etcd1 ~]# etcdctl cluster-health member adff72f24ac33f4b is healthy: got healthy result from http://192.168.0.91:2379 member c883f9e325d8667d is healthy: got healthy result from http://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from http://192.168.0.92:2379 cluster is healthy 3、集群之间通信介绍 集群服务中的通信一般包括两种场景： 对外提供服务的通信，发生在集群外部的客户端和集群某个节点之间，etcd默认端口为2379，例如 etcdctl 就属于客户端 集群内部的通信，发生在集群内部的任意两个节点之间，etcd的默认端口为2380， 刚安装完etcd可以看到配置文件里面都是http，这是不安全的，为了加强集群通信安全，需要使用https，下面就要介绍如何使用https来访问集群 4、 创建RootCA 4.1、 安装pki证书管理工具cfssl 安装cfssl工具 只要把安装包改下名字，移动到usr/local/bin/下，加上授权即可 通过网盘下载cfssl工具 链接：https://pan.baidu.com/s/1PGVlADPfCMhYEfYlMngDHQ 提取码：itrj 链接：https://pan.baidu.com/s/1KsDKbbzwO82WegqPAlonyg 提取码：n8ce 链接：https://pan.baidu.com/s/1dM8cJ38XAO_n6S-KKHZlqw 提取码：5n6m mv cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo mv cfssl_linux-amd64 /usr/local/bin/cfssl mv cfssljson_linux-amd64 /usr/local/bin/cfssljson chmod +x /usr/local/bin/cfssl* 4.2、配置PKI 证书分两种情况： 服务器与客户端之间的通信，这种情况下服务器的证书仅用于服务器认证，客户端证书仅用于客户端认证 服务器间的通信，这种情况下每个etcd既是服务器也是客户端，因此其证书既要用于服务器认证，也要用于客户端认证 创建PKI配置文件 mkdir /etc/etcd/pki cd /etc/etcd/pki cfssl print-defaults config > ca-config.json vi ca-config.json cat >ca-config.json <<EOF { "signing": { "default": { "expiry": "168h" }, "profiles": { "server": { "expiry": "8760h", "usages": [ "signing", "key encipherment", "server auth" ] }, "client": { "expiry": "8760h", "usages": [ "signing", "key encipherment", "client auth" ] }, "peer": { "expiry": "8760h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } EOF 在其中定义3个profile server，作为服务器与客户端通信时的服务器证书 client，作为服务器与客户端通信时的客户端证书 peer，作为服务器间通信时用的证书，既认证服务器也认证客户端 4.3、 创建RootCA证书 cfssl print-defaults csr > rootca-csr.json vi rootca-csr.json 修改后内容如下，由于CA证书不表示任何一台服务器，因此此处无需hosts字段 cat >rootca-csr.json<<EOF { "CN": "ETCD Root CA", "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -initca rootca-csr.json | cfssljson -bare rootca ls rootca* rootca.csr rootca-csr.json rootca-key.pem rootca.pem 把根CA证书拷贝到集群的所有节点当中： scp /etc/etcd/pki/rootca.pem root@192.168.0.92:/etc/etcd/pki/rootca.pem scp /etc/etcd/pki/rootca.pem root@192.168.0.93:/etc/etcd/pki/rootca.pem 证书授权 chown -R etcd:etcd /etc/etcd/pki/* 根CA证书只有1个, 每个节点都保存，只保存证书即可。 服务器server证书1个，本实验中为整个集群使用1个证书，每个服务器均保存该证书和私钥。 客户端证书1个, 本实验环境中仅供etcdctl使用，因此在运行etcdctl的主机上保存证书和私钥即可。实际工作中中每个访问etcd的客户端都应该有自己的客户端证书和私钥。 服务器peer证书3个, 每个节点保存自己的证书和私钥 5、 集群外部开启pki安全认证 注意：外部的意思在本篇就是使用 etcdtl来访问，etcdctl 就是外部客户端。如果k8s的apiserver访问etcd，那么apiserver就是客户端 5.1、 创建服务器证书 方式一、 集群成员用各自的证书 也就是说请求文件中hosts只写本机ip地址 本文采用第一种方式 生产etcd1服务端证书 cfssl print-defaults csr > etcd1-csr.json vi etcd1-csr.json cat > etcd1-csr.json<< EOF { "CN": "ETCD Cluster-1", "hosts": [ "192.168.0.91" ], "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=server etcd1-csr.json | cfssljson -bare etcd1 生产etcd2服务端证书 cfssl print-defaults csr > etcd2-csr.json vi etcd2-csr.json cat > etcd2-csr.json<< EOF { "CN": "ETCD Cluster-2", "hosts": [ "192.168.0.92" ], "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=server etcd2-csr.json | cfssljson -bare etcd2 生产etcd3服务端证书 cfssl print-defaults csr > etcd3-csr.json vi etcd3-csr.json cat > etcd3-csr.json<< EOF { "CN": "ETCD Cluster-3", "hosts": [ "192.168.0.93" ], "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=server etcd3-csr.json | cfssljson -bare etcd3 复制证书 复制证书到对应节点 所有节点创建目录 mkdir -p /etc/etcd/pki/ scp /etc/etcd/pki/etcd2*.pem root@192.168.0.92:/etc/etcd/pki/ scp /etc/etcd/pki/etcd3*.pem root@192.168.0.93:/etc/etcd/pki/ 授权 给所有节点证书授权，否则启动报错 因为用root用户生成的证书文件，证书权限为rw-------，etcd用户没有读权限，而配置文件里面的ETCD_就代表etcd用户，因此需要将其属主修改为etcd。 chown -R etcd:etcd /etc/etcd/pki/* 方式二、 集群成员用统一的证书 也就是说请求文件中hosts填写集群所有ip地址 注意 hosts也可以改成域名 所有使用证书的服务器都要写到下面hosts列表里面，否则无法建立连接，以后添加新成员的话，hosts也要改 从上面可以看到hosts中有三个地址，如果以后要扩充集群节点，就需要修改hosts列表重新生成证书，重新分发到所有节点上，这样容易出错，也麻烦 生产环境一般把hosts写成统一的对外域名。这里最好分开创建三个配置文件，每个配置文件里面填写一个ip，不公用。以后扩容也方便。 cfssl print-defaults csr > etcd-csr.json vi etcd-csr.json cat >etcd-csr.json<<EOF { "CN": "ETCD Cluster", "hosts": [ "192.168.0.91", "192.168.0.92", "192.168.0.93" ], "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=server etcd-csr.json | cfssljson -bare etcd 所有节点创建目录 mkdir -p /etc/etcd/pki/ scp /etc/etcd/pki/etcd*.pem root@192.168.0.92:/etc/etcd/pki/ scp /etc/etcd/pki/etcd*.pem root@192.168.0.93:/etc/etcd/pki/ 给所有节点证书授权 因为用root用户生成的证书文件，证书权限为rw-------，etcd用户没有读权限，而配置文件里面的ETCD_就代表etcd用户，因此需要将其属主修改为etcd。 chown -R etcd:etcd /etc/etcd/pki/* 5.2、 修改etcd1配置并重启 cat >/etc/etcd/etcd.conf << EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.91:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.91:2379,http://127.0.0.1:2379" ETCD_NAME="etcd1" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.91:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.91:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=http://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd1.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd1-key.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 此时改变的仅仅时集群对外的服务方式，内部的通信方式并没有改变，因此无需删除实例，可直接重启etcd。 重启后，使用etcdctl指令访问集群，如果在不指定–ca-file参数，结果会提示 https://192.168.0.91:2379 访问失败，因为其证书是不受信任的。 [root@test1 ~]# etcdctl cluster-health failed to check the health of member 6c70a880257288f on https://192.168.0.91:2379: Get https://192.168.0.91:2379/health: x509: certificate signed by unknown authority member 6c70a880257288f is unreachable: [https://192.168.0.91:2379] are all unreachable member 3f7336e156287ed0 is healthy: got healthy result from http://192.168.0.93:2379 member 5bbe42788a239cc6 is healthy: got healthy result from http://192.168.0.92:2379 cluster is healthy 注意：ETCD_LISTEN_CLIENT_URLS中包含了http://127.0.0.1:2379, 因此直接指定该地址可以访问etcd，但是ETCD_ADVERTISE_CLIENT_URLS中不包含http://127.0.0.1:2379, 因此etcd在给客户端广播集群节点的地址时，只会广播https://192.168.56.41:2379, etcdctl紧接着用这个地址去查询集群健康状态时，但证书不受信任无法访问。 加上–ca-file参数指定用于校验的CA证书，即根CA证书后，访问正常。 [root@test1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem cluster-health member 6c70a880257288f is healthy: got healthy result from https://192.168.0.91:2379 member 3f7336e156287ed0 is healthy: got healthy result from http://192.168.0.93:2379 member 5bbe42788a239cc6 is healthy: got healthy result from http://192.168.0.92:2379 cluster is healthy 上面输出可以看到，仅有1个节点启动了https。对其余两个节点重复本节操作即可。出于对rootca的安全考虑，服务器证书的生成操作在一台服务器上完成，生成后将其拷贝到相应节点即可。配置并重启完所有节点后，应该可以看到所有节点的侦听URL均为https协议。 5.3、 修改etcd2配置并重启 cat >/etc/etcd/etcd.conf << EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.92:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.92:2379,http://127.0.0.1:2379" ETCD_NAME="etcd2" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.92:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.92:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=http://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd2.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd2-key.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 5.4、 修改etcd3配置并重启 cat >/etc/etcd/etcd.conf << EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.93:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.93:2379,http://127.0.0.1:2379" ETCD_NAME="etcd3" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.93:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.93:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=http://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd3.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd3-key.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 查看健康状态 [root@test1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem cluster-health member 6c70a880257288f is healthy: got healthy result from https://192.168.0.91:2379 member 3f7336e156287ed0 is healthy: got healthy result from https://192.168.0.93:2379 member 5bbe42788a239cc6 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 发现都变成了https模式 6、 客户端验证 6.1.1、 修改etcd1配置并重启 启动客户端认证需要修改以下参数： ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" cat > /etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.91:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.91:2379,http://127.0.0.1:2379" ETCD_NAME="etcd1" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.91:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.91:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=http://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd1.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd1-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启etcd1 systemctl daemon-reload && systemctl restart etcd 重启etcd服务后发现即使指定了–ca-file参数，https节点仍然无法访问。这次的错误是证书错误，因为客户端没有提供任何证书。 [root@test1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem cluster-health failed to check the health of member 6c70a880257288f on https://192.168.0.91:2379: Get https://192.168.0.91:2379/health: remote error: tls: bad certificate member 6c70a880257288f is unreachable: [https://192.168.0.91:2379] are all unreachable member 3f7336e156287ed0 is healthy: got healthy result from https://192.168.0.93:2379 member 5bbe42788a239cc6 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 6.1.2、 创建客户端证书 修改后内容如下，etcdctl可能运行在多台节点上，因此不指定可以使用该证书的主机列表。 创建客户端证书请求文件所需配置: cfssl print-defaults csr > etcdctl-csr.json vi etcdctl-csr.json cat >etcdctl-csr.json<<EOF { "CN": "ETCDCTL", "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=client etcdctl-csr.json | cfssljson -bare etcdctl 授权 chown -R etcd:etcd /etc/etcd/pki/* 复制证书 scp /etc/etcd/pki/etcdctl*.pem root@192.168.0.92:/etc/etcd/pki/ scp /etc/etcd/pki/etcdctl*.pem root@192.168.0.93:/etc/etcd/pki/ 授权 复制过去要给对方节点授权 chown -R etcd:etcd /etc/etcd/pki/* 然后在etcdctl命令行中指定生成的证书和私钥，才能成功访问节点: [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member 6c70a880257288f is healthy: got healthy result from https://192.168.0.91:2379 member 3f7336e156287ed0 is healthy: got healthy result from https://192.168.0.93:2379 member 5bbe42788a239cc6 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 6.2.1、 修改etcd2配置并重启 启动客户端认证需要修改以下参数： ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" cat > /etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.92:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.92:2379,http://127.0.0.1:2379" ETCD_NAME="etcd2" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.92:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.92:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=http://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd2.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd2-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启etcd2 systemctl daemon-reload && systemctl restart etcd 然后在etcdctl命令行中指定生成的客户端证书和私钥，访问节点: [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member 6c70a880257288f is healthy: got healthy result from https://192.168.0.91:2379 member 3f7336e156287ed0 is healthy: got healthy result from https://192.168.0.93:2379 member 5bbe42788a239cc6 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 6.3.1、 修改etcd3配置并重启 启动客户端认证需要修改以下参数： ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" cat > /etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.93:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.93:2379,http://127.0.0.1:2379" ETCD_NAME="etcd3" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.93:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.93:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=http://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd3.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd3-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启etcd3 systemctl daemon-reload && systemctl restart etcd 然后在etcdctl命令行中指定生成的客户端证书和私钥，访问节点: [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member 6c70a880257288f is healthy: got healthy result from https://192.168.0.91:2379 member 3f7336e156287ed0 is healthy: got healthy result from https://192.168.0.93:2379 member 5bbe42788a239cc6 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 7、集群内部开启pki安全认证 方式一： 不重建集群开启pki安全认证 7.1、先修改etcd3节点为安全通信 7.1.1、准备peer证书 注意：peer证书既是服务端证书又是客户端证书，从下面参数 -profile=peer中可以看到 和server证书一样，3个节点的peer证书其实也可以共用一个，考虑到以后扩容代理的麻烦，所以这里每个节点都配置自己的peer证书3个节点分别创建peer证书请求文件 生产peer1证书 cfssl print-defaults csr > etcd1-peer-csr.json vi etcd1-peer-csr.json cat >etcd1-peer-csr.json <<EOF { "CN": "ETCD Peer on etcd1", "hosts": [ "192.168.0.91" ], "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=peer etcd1-peer-csr.json | cfssljson -bare etcd1-peer 生产peer2证书 cfssl print-defaults csr > etcd2-peer-csr.json vi etcd2-peer-csr.json cat >etcd2-peer-csr.json <<EOF { "CN": "ETCD Peer on etcd2", "hosts": [ "192.168.0.92" ], "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=peer etcd2-peer-csr.json | cfssljson -bare etcd2-peer 生产peer3证书 cfssl print-defaults csr > etcd3-peer-csr.json vi etcd3-peer-csr.json cat >etcd3-peer-csr.json <<EOF { "CN": "ETCD Peer on etcd3", "hosts": [ "192.168.0.93" ], "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=peer etcd3-peer-csr.json | cfssljson -bare etcd3-peer 注意：peer证书既是服务端证书又是客户端证书，从上面参数 -profile=peer中可以看到 7.1.2、复制证书 scp /etc/etcd/pki/etcd2-peer*.pem root@192.168.0.92:/etc/etcd/pki/ scp /etc/etcd/pki/etcd3-peer*.pem root@192.168.0.93:/etc/etcd/pki/ 7.1.3、授权 所有节点授权，复制过去要记得给授权，否则启动报错 chown -R etcd:etcd /etc/etcd/pki/* 7.1.4、查看节点列表，获取节点标识 [root@etcd1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=http://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true c883f9e325d8667d: name=etcd3 peerURLs=http://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=http://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false 7.1.5、修改etcd3节点的peer url为https [root@etcd1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member update c883f9e325d8667d https://192.168.0.93:2380 Updated member with ID c883f9e325d8667d in cluster 7.1.6、重新检查节点列表和集群健康状态 [root@etcd1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=http://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=http://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false [root@etcd3 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member adff72f24ac33f4b is healthy: got healthy result from https://192.168.0.91:2379 member c883f9e325d8667d is healthy: got healthy result from https://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 可以看到etcd3的peer地址已经是https了，但实际上此时etcd3的侦听地址没有修改，https所需要的相关证书都没有配置，https通信是不可能建立的，因此事实上此时与etcd3的通信仍然是通过http。 注意：如果发现peerURLs不是https，原因在于执行"修改etcd3节点的peer url为https步骤"的时候掉了步骤最后面的https://192.168.0.93:2380 或者ID不正确，重新执行几遍即可 7.1.7、修改etcd3的peer工作端口为https 修改内容如下: ETCD_LISTEN_PEER_URLS="https://192.168.0.93:2380" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd3-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd3-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" cat >/etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.93:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.93:2379,http://127.0.0.1:2379" ETCD_NAME="etcd3" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.93:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.93:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd3.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd3-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd3-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd3-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 查看集群状态 [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 6c70a880257288f: name=etcd1 peerURLs=http://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true 3f7336e156287ed0: name=etcd3 peerURLs=http://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false 5bbe42788a239cc6: name=etcd2 peerURLs=http://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false 上述配置在etcd3启动了服务器端的https通信，并且要求进行客户端验证，而作为客户端的etcd1和etcd2还没有相关配置，因此https通信仍然会失败，与etcd3的通信仍然fallback到http上 因此需要修改etcd1和etcd2进行客户端验证 7.1.8、 在etcd1和etcd2上配置客户端所需证书 涉及的参数主要是客户端自身的证书和私钥，以及用于验证etcd3的根CA证书： etcd1 ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd1-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd1-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" 执行： cat > /etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.91:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.91:2379,http://127.0.0.1:2379" ETCD_NAME="etcd1" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.91:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.91:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd1.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd1-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" #开启集群内部服务端认证同时带上客户端证书 ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd1-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd1-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF systemctl daemon-reload && systemctl restart etcd etcd2 ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd2-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd2-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" 执行： cat > /etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.92:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.92:2379,http://127.0.0.1:2379" ETCD_NAME="etcd2" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.92:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.92:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=http://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd2.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd2-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" #开启集群内部服务端认证同时带上客户端证书 ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd2-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd2-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF systemctl daemon-reload && systemctl restart etcd 查看集群状态 [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 6c70a880257288f: name=etcd1 peerURLs=http://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true 3f7336e156287ed0: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false 5bbe42788a239cc6: name=etcd2 peerURLs=http://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false 发现etcd3上的报错随即停 注意：如果先在节点上修改配置文件启用https URL，再使用etcdctl指令修改集群的peer访问端点，在两步之间的时间里，实际上是客户端使用http协议访问服务器的https服务， 这段时间实际集群间的通信是失败的。可在服务器上看到https请求被拒绝的错误： [root@etcd3 ~]# systemctl status etcd -l Jan 26 01:48:12 etcd3 etcd[2525]: rejected connection from "192.168.0.92:43682" Jan 26 01:48:12 etcd3 etcd[2525]: rejected connection from "192.168.0.91:47588" 7.2、修改etcd2节点为安全通信 查看节点列表，获取节点标识 [root@etcd1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=http://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=http://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false 修改etcd2节点的peer url为https etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member update adff72f24ac33f4b https://192.168.0.91:2380 执行结果： [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member update 5bbe42788a239cc6 https://192.168.0.91:2380 Updated member with ID 5bbe42788a239cc6 in cluster 重新检查节点列表和集群健康状态 [root@etcd3 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=false c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=true c96f41ba37a00a16: name=etcd2 peerURLs=http://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false [root@etcd3 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member adff72f24ac33f4b is healthy: got healthy result from https://192.168.0.91:2379 member c883f9e325d8667d is healthy: got healthy result from https://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 发现etcd2节点的peerURLs改成了https 注意：如果发现peerURLs不是https，原因在于执行"修改etcd3节点的peer url为https步骤"的时候掉了步骤最后面的https://192.168.0.93:2380 或者ID不正确，重新执行几遍即可 修改etcd2的peer工作端口为https ETCD_LISTEN_PEER_URLS="https://192.168.0.91:2380" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.91:2380" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd3-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd3-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" 执行： cat > /etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.92:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.92:2379,http://127.0.0.1:2379" ETCD_NAME="etcd2" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.92:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.92:2379" ETCD_INITIAL_CLUSTER="etcd1=http://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd2.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd2-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd2-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd2-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 7.2、修改etcd1节点为安全通信 查看节点列表，获取节点标识 [root@etcd1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=http://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=http://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false 修改etcd1节点的peer url为https etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member update c96f41ba37a00a16 https://192.168.0.91:2380 执行结果： [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member update adff72f24ac33f4b https://192.168.0.91:2380 membership: peerURL exists 重新检查节点列表和集群健康状态 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=false c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=true c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member adff72f24ac33f4b is healthy: got healthy result from https://192.168.0.91:2379 member c883f9e325d8667d is healthy: got healthy result from https://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 发现etcd1节点 peerURLs变为https 注意：如果发现peerURLs不是https，原因在于执行"修改etcd3节点的peer url为https步骤"的时候掉了步骤最后面的https://192.168.0.93:2380 或者ID不正确，重新执行几遍即可 修改etcd1的peer工作端口为https ETCD_LISTEN_PEER_URLS="https://192.168.0.92:2380" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.92:2380" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd3-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd3-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" 执行： cat > /etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.91:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.91:2379,http://127.0.0.1:2379" ETCD_NAME="etcd1" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.91:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.91:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd1.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd1-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd1-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd1-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 重新检查节点列表和集群健康状态 [root@etcd3 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=false c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=true c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false [root@etcd3 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member adff72f24ac33f4b is healthy: got healthy result from https://192.168.0.91:2379 member c883f9e325d8667d is healthy: got healthy result from https://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 可以看到peerURLs改变为https模式 如果先在节点上修改配置文件启用https URL，再使用etcdctl指令修改集群的peer访问端点，会报如下错误,所以最好是先使用etcdct指令修改访问端点，再修改服务器配置文件启用https。 [root@etcd3 ~]# systemctl status etcd -l ● etcd.service - Etcd Server Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled) Active: active (running) since Sat 2019-01-26 01:43:20 EST; 4min 52s ago Main PID: 2525 (etcd) CGroup: /system.slice/etcd.service └─2525 /usr/bin/etcd --name=etcd3 --data-dir=/var/lib/etcd/default.etcd --listen-client-urls=https://192.168.0.93:2379,http://127.0.0.1:2379 Jan 26 01:48:12 etcd3 etcd[2525]: rejected connection from "192.168.0.92:43682" (error "remote error: tls: bad certificate", ServerName "") Jan 26 01:48:12 etcd3 etcd[2525]: rejected connection from "192.168.0.91:47588" (error "remote error: tls: bad certificate", ServerName "") Jan 26 01:48:12 etcd3 etcd[2525]: rejected connection from "192.168.0.92:43684" (error "remote error: tls: bad certificate", ServerName "") Jan 26 01:48:12 etcd3 etcd[2525]: rejected connection from "192.168.0.91:47590" (error "remote error: tls: bad certificate", ServerName "") 7.3、所有文件改成https并重启 etcd1节点etcd配置文件 cat > /etc/etcd/etcd.conf <<EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.91:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.91:2379,http://127.0.0.1:2379" ETCD_NAME="etcd1" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.91:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.91:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd1.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd1-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" #开启集群内部服务端认证并带上客户端证书 ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd1-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd1-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd etcd2节点etcd配置文件 cat >/etc/etcd/etcd.conf << EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.92:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.92:2379,http://127.0.0.1:2379" ETCD_NAME="etcd2" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.92:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.92:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd2.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd2-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" #开启集群内部服务端认证并带上客户端证书 ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd2-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd2-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd etcd3节点etcd配置文件 cat >/etc/etcd/etcd.conf << EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.93:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.93:2379,http://127.0.0.1:2379" ETCD_NAME="etcd3" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.93:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.93:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd3.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd3-key.pem" #开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" #开启集群内部服务端认证并带上客户端证书 ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd3-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd3-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 报错解决： [root@etcd1 ~]# systemctl status etcd -l ● etcd.service - Etcd Server Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled) Active: active (running) since Sat 2019-01-26 02:35:51 EST; 4min 18s ago Main PID: 3117 (etcd) CGroup: /system.slice/etcd.service └─3117 /usr/bin/etcd --name=etcd1 --data-dir=/var/lib/etcd/default.etcd --listen-client-urls=https://192.168.0.91:2379,http://127.0.0.1:2379 Jan 26 02:35:51 etcd1 etcd[3117]: established a TCP streaming connection with peer c96f41ba37a00a16 (stream Message writer) Jan 26 02:35:51 etcd1 etcd[3117]: established a TCP streaming connection with peer c883f9e325d8667d (stream MsgApp v2 writer) Jan 26 02:35:51 etcd1 bash[3117]: WARNING: 2019/01/26 02:35:51 Failed to dial 192.168.0.91:2379: connection error: desc = "transport: 查看错误： WARNING: 2019/01/26 02:35:51 Failed to dial 192.168.0.91:2379: connection error: 原因： ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,k8s=https://192.168.0.92:2380,k8=https://192.168.0.93:2380" 纠正： ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,k83=https://192.168.0.93:2380" 重启 systemctl daemon-reload && systemctl restart etcd 方式二：重建集群启用https 注意：这种方式会丢失所有数据，一般在新建集群时使用。一般不使用这种方式 集群节点的peer访问端点存储在数据目录，因此修改ETCD_INITIAL_CLUSTER参数后，最简单让其生效的方法就是重建集群。 在所有节点上修改etcd配置文件，将peer的url修改为https，配置相关证书，以etcd3为例，涉及参数如下： ETCD_LISTEN_PEER_URLS="https://192.168.0.93:2380" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.93:2380" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd1-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd1-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" [root@etcd3 ~]# cat /etc/etcd/etcd.conf ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.93:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.93:2379,http://127.0.0.1:2379" ETCD_NAME="etcd3" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.93:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.93:2379" ETCD_INITIAL_CLUSTER="etcd4=https://192.168.0.94:2380,etcd1=https://192.168.0.91:2380,etcd3=https://192.168.0.93:2380,etcd2=https://192.168.0.92:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_CERT_FILE="/etc/etcd/pki/etcd.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd-key.pem" ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd3-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd3-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" 在所有节点上删除已有实例，重启etcd。 systemctl stop etcd rm -rf /var/lib/etcd/default.etcd systemctl daemon-reload && systemctl restart etcd 8、etcd节点扩容 8.1、安装etcd 本文通篇注意：对于新加入的成员，新成员自己每次修改配置文件后如果重启失败，那么新成员本身需要删除残留成员目录，且lesder节点需要剔除新成员才可以启动。 假如要扩容etcd4节点 etc4节点设置主机名、关闭防火墙、关闭selinux sed -i '$ahostname=test4' /etc/sysconfig/network && hostnamectl set-hostname test4 sed -i '$a est4' /etc/hostname cat >>/etc/hosts<< EOF 192.168.0.91 test1 192.168.0.92 test2 192.168.0.93 test3 192.168.0.94 test1 EOF 重启 重启目的是让主机名永久生效 reboot 配置免密登录 配置ntp服务器保证所有节点时间一致 ，参照 https://www.cnblogs.com/effortsing/p/10011459.html(这一步非必须) etcd4节点安装、启动etcd yum install -y etcd systemctl start etcd && systemctl enable etcd 查看状态 etcdctl cluster-health member 8e9e05c52164694d is healthy: got healthy result from http://localhost:2379 不安装etcd也可以添加新成员，这是添加了也没有用 注意：安装完etcd后就可以在leader上添加新成员了，但是这个时候不要添加，严格按照步骤做，否则会报各种错误。 8.2、以集群模式启动 停掉etcd systemctl stop etcd 修改配置文件 cat > /etc/etcd/etcd.conf<< EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.94:2380" ETCD_LISTEN_CLIENT_URLS="http://192.168.0.94:2379,http://127.0.0.1:2379" ETCD_NAME="etcd4" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.94:2380" ETCD_ADVERTISE_CLIENT_URLS="http://192.168.0.94:2379" ETCD_INITIAL_CLUSTER="etcd4=http://192.168.0.94:2380" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" EOF 注意：ETCD_INITIAL_CLUSTER_STATE="new" 这个new代表新成员，没有这句话是无法加入的 删除原来成员 必须删除原来成员，否则导致冲突，无法启动 rm -rf /var/lib/etcd/default.etcd 启动 systemctl daemon-reload && systemctl restart etcd 8.3、leader节点上添加新成员 原集群的三个节点，其中有一个是leader节点，可以通过查看成员列表看到，isLeader=true，必须在leader节点上添加，否则报错。 如果出现如下错误，说明之前添加过该成员，但是没有剔除，所以再次添加该成员时候会如下报错； 如果没有出现如下错误，说明之前没有添加过该成员。之前实验的集群中添加过etcd4节点，但是没有剔除etcd4，后来把etcd4虚拟机删除后重新克隆了一份，所以会报如下错误。 etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member add etcd4 http://192.168.0.94:2380 如果出现如下错误： [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member add etcd4 http://192.168.0.94:2380 client: etcd cluster is unavailable or misconfigured; error #0: client: etcd member https://192.168.0.93:2379 has no leader ; error #1: client: etcd member https://192.168.0.91:2379 has no leader ; error #2: client: etcd member https://192.168.0.92:2379 has no leader ; error #3: EOF 如果添加失败有两种情况 第一种情况： 是因为原有集群中已经有etcd4节点了，需要删除该节点后才可以添加，删除操作看下面： 先查看成员列表 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=false bc721669bdca5256[unstarted]: peerURLs=http://192.168.0.94:2380 c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=true 发现果然存在etcd4成员，这是之前残留的，剔除掉，否则冲突导致无法添加 删除etcd4节点 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member remove bc721669bdca5256 Removed member bc721669bdca5256 from cluster 再次查看成员列表 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=false c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=true c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false 发现没有了etcd4节点 第二种情况： 查看leader节点日志如下 [root@test1 pki]# journalctl -xe Jan 28 08:55:18 test1 etcd[2267]: failed to find member 6c70a880257288f in cluster a03ca7b6ecf1d2d4 Jan 28 08:55:18 test1 etcd[2267]: failed to find member 6c70a880257288f in cluster a03ca7b6ecf1d2d4 Jan 28 08:55:18 test1 etcd[2267]: streaming request ignored (ID mismatch got 5bbe42788a239cc6 want 6c70a880257288f) Jan 28 08:55:18 test1 etcd[2267]: streaming request ignored (ID mismatch got 5bbe42788a239cc6 want 6c70a880257288f) Jan 28 08:55:18 test1 etcd[2267]: failed to find member 6c70a880257288f in cluster a03ca7b6ecf1d2d4 再查看之前执行的命令过程 [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 6c70a880257288f: name=etcd1 peerURLs=http://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=false 3f7336e156287ed0: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=true 5bbe42788a239cc6: name=etcd2 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.92:2379 isLeader=false 62f2353f81e89de3[unstarted]: peerURLs=http://192.168.0.94:2380 [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member update 6c70a880257288f https://192.168.0.4:2380 Updated member with ID 6c70a880257288f in cluster [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 6c70a880257288f: name=etcd1 peerURLs=https://192.168.0.4:2380 clientURLs=https://192.168.0.91:2379 isLeader=false 3f7336e156287ed0: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=true 5bbe42788a239cc6: name=etcd2 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.92:2379 isLeader=false 62f2353f81e89de3[unstarted]: peerURLs=http://192.168.0.94:2380 [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member remove 62f2353f81e89de3 Removed member 62f2353f81e89de3 from cluster [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 6c70a880257288f: name=etcd1 peerURLs=https://192.168.0.4:2380 clientURLs=https://192.168.0.91:2379 isLeader=false 3f7336e156287ed0: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=true 5bbe42788a239cc6: name=etcd2 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.92:2379 isLeader=false [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member add etcd4 http://192.168.0.94:2380 client: etcd cluster is unavailable or misconfigured; error #0: client: etcd member https://192.168.0.92:2379 has no leader ; error #1: client: etcd member https://192.168.0.91:2379 has no leader ; error #2: client: etcd member https://192.168.0.93:2379 has no leader [root@test1 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member update 6c70a880257288f https://192.168.0.4:2380 Updated member with ID 6c70a880257288f in cluster 上面是之前执行的命令，找出update 6c70a880257288f https://192.168.0.4:2380，这里看出来把etcd1的id更新成了 https://192.168.0.4:2380，ip也没写全， 然后又剔除了62f2353f81e89de3，然后又开始添加etcd4节点，之后就开始报错。 解决： 原理：把etcd1节点剔除重新添加即可，但是我没有做成。 leader节点上剔除etcd1 [root@test3 pki]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member remove 6c70a880257288f Removed member 6c70a880257288f from cluster 添加etcd1 [root@test3 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member add etcd1 http://192.168.0.91:2380 Added member named etcd1 with ID f62393f31ba7a865 to cluster ETCD_NAME="etcd1" ETCD_INITIAL_CLUSTER="etcd3=https://192.168.0.93:2380,etcd2=https://192.168.0.91:2380,etcd1=http://192.168.0.91:2380" ETCD_INITIAL_CLUSTER_STATE="existing" 暂时先不用etcd1了 再次添加新成员 etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member add etcd4 http://192.168.0.94:2380 执行结果： [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member add etcd4 http://192.168.0.94:2380 Added member named etcd4 with ID 7cdd9649a07e40fb to cluster ETCD_NAME="etcd4" ETCD_INITIAL_CLUSTER="etcd4=http://192.168.0.94:2380,etcd1=https://192.168.0.91:2380,etcd3=https://192.168.0.93:2380,etcd2=https://192.168.0.92:2380" ETCD_INITIAL_CLUSTER_STATE="existing" 到此添加成功 查看节点列表和集群健康状态 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 7cdd9649a07e40fb[unstarted]: peerURLs=http://192.168.0.94:2380 adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=false c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=true [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member adff72f24ac33f4b is healthy: got healthy result from https://192.168.0.91:2379 member 7cdd9649a07e40fb is unreachable: no available published client urls member c883f9e325d8667d is healthy: got healthy result from https://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 刚添加完新成员看到集群时不健康的，需要修改etcd4配置文件，进行如下操作 8.4、纠正集群为健康状态 创建证书目录 mkdir -p /etc/etcd/pki/ 拷贝根证书并授权 scp root@192.168.0.91:/etc/etcd/pki/rootca* /etc/etcd/pki/ 生成etcd4服务端证书 cfssl print-defaults csr > etcd4-csr.json vi etcd4-csr.json cat >etcd4-csr.json <<EOF { "CN": "ETCD Peer on etcd4", "hosts": [ "192.168.0.94" ], "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=server etcd4-csr.json | cfssljson -bare etcd4 拷贝服务端证书并授权 scp /etc/etcd/pki/etcd4*.pem root@192.168.0.94:/etc/etcd/pki/ 生成peer4证书 cfssl print-defaults csr > etcd4-peer-csr.json vi etcd4-csr.json cat >etcd4-peer-csr.json<<EOF { "CN": "ETCD Peer on etcd4", "hosts": [ "192.168.0.94" ], "key": { "algo": "ecdsa", "size": 256 }, "names": [ { "C": "US", "L": "CA", "ST": "San Francisco" } ] } EOF cfssl gencert -ca=rootca.pem -ca-key=rootca-key.pem -config=ca-config.json -profile=peer etcd4-peer-csr.json | cfssljson -bare etcd4-peer 拷贝peer4证书并授权 scp /etc/etcd/pki/etcd4-peer*.pem root@192.168.0.94:/etc/etcd/pki/ 给所有证书授权 chown -R etcd:etcd /etc/etcd/pki/* 修改etcd4配置文件 把添加新成员那一步生成的结果写到配置文件里面 注意：可不跨越步骤，直接进行下一步操作，否则无法启动，会报各种错误 注意：添加PEER参数改变了集群内部通信方式需要删除实例后重启 cat > /etc/etcd/etcd.conf << EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="http://192.168.0.94:2380" ETCD_LISTEN_CLIENT_URLS="http://192.168.0.94:2379,http://127.0.0.1:2379" ETCD_NAME="etcd4" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.0.94:2380" ETCD_ADVERTISE_CLIENT_URLS="http://192.168.0.94:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380,etcd4=http://192.168.0.94:2380" ETCD_INITIAL_CLUSTER_STATE="existing" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #带上集群内部客户端证书同时开启集群内部服务端认证 ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd4-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd4-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 注意：本次修改不能修改peerURLs、clientURLs为https模式，试过多次，修改后总是无法启动。遵循之前的过程，逐步替换为https模式， 注意：本次修改配置文件里面必须要带上peer证书和开启服务端认证，否则无法启动，会报如下错误。因为从添加新成员产生的结果看到其他节点都是安全访问模式， 所以配置文件里面要带上客户端证书才可以访问安全端口，peer证书既是服务端证书又是客户端证书 启动 systemctl daemon-reload && systemctl restart etcd 如果启动失败： [root@etcd4 ~]# systemctl daemon-reload && systemctl restart etcd Job for etcd.service failed because the control process exited with error code. See "systemctl status etcd.service" and "journalctl -xe" for details. [root@etcd4 ~]# journalctl -xe Jan 27 22:08:31 etcd4 etcd[1638]: listening for client requests on 127.0.0.1:2379 Jan 27 22:08:31 etcd4 etcd[1638]: listening for client requests on 192.168.0.94:2379 Jan 27 22:08:31 etcd4 etcd[1638]: open /etc/etcd/pki/etcd4-peer-key.pem: permission denied Jan 27 22:08:31 etcd4 systemd[1]: etcd.service: main process exited, code=exited, status=1/FAILURE Jan 27 22:08:31 etcd4 systemd[1]: Failed to start Etcd Server. 发现看到倒数第三行错误：open /etc/etcd/pki/etcd4-peer-key.pem: permission denied 是因为权限不足问题导致启动失败 添加授权 chown -R etcd:etcd /etc/etcd/pki/* 再次重启： systemctl daemon-reload && systemctl restart etcd 启动成功 本文通篇注意：对于新加入的成员，每次修改配置文件后如果启动失败就需要删除本节点残留成员目录，而且需要从lesder节点剔除新成员，否则会有冲突，导致无法启动成功， 查看节点列表和集群健康状态 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 7cdd9649a07e40fb[unstarted]: peerURLs=http://192.168.0.94:2380 adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member 7cdd9649a07e40fb is unreachable: no available published client urls member adff72f24ac33f4b is healthy: got healthy result from https://192.168.0.91:2379 member c883f9e325d8667d is healthy: got healthy result from https://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 如果发现集群仍然是不健康状态，就需要删除残留成员目录并重启，如果是健康的，跳过下一步 查看日志报错 [root@etcd4 ~]# systemctl status etcd ● etcd.service - Etcd Server Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled) Active: active (running) since Sun 2019-01-27 21:50:28 EST; 17min ago Main PID: 1533 (etcd) CGroup: /system.slice/etcd.service └─1533 /usr/bin/etcd --name=etcd4 --data-dir=/var/lib/etcd/default.etcd --listen-client-urls=http://192.168.0.94:2379,ht... Jan 27 22:08:16 etcd4 etcd[1533]: request cluster ID mismatch (got 9488eae2b4328f45 want 29ae782d95021b85) Jan 27 22:08:16 etcd4 etcd[1533]: request cluster ID mismatch (got 9488eae2b4328f45 want 29ae782d95021b85) Jan 27 22:08:16 etcd4 etcd[1533]: request cluster ID mismatch (got 9488eae2b4328f45 want 29ae782d95021b85) Jan 27 22:08:16 etcd4 etcd[1533]: request cluster ID mismatch (got 9488eae2b4328f45 want 29ae782d95021b85) Jan 27 22:08:16 etcd4 etcd[1533]: request cluster ID mismatch (got 9488eae2b4328f45 want 29ae782d95021b85) Jan 27 22:08:16 etcd4 etcd[1533]: request cluster ID mismatch (got 9488eae2b4328f45 want 29ae782d95021b85) 发现上面错误说明数据目录中的成员和请求要加入的成员不匹配，删除本节点数据目录重启即可 删除残留成员目录并重启 systemctl stop etcd rm -rf /var/lib/etcd/default.etcd systemctl daemon-reload && systemctl restart etcd 如果删除后无法启动就查看日志报错，对应解决即可 例如下面错误： [root@test1 pki]# systemctl daemon-reload && systemctl restart etcd Jan 28 09:57:01 test1 etcd[3687]: couldn't find local name "etcd4" in the initial cluster configuration 从错误中很容易解决的，就是配置文件里面的名义定义错误了， 如果解决完错误还是无法启动，那就剔除掉新成员重新添加，重复这个过程，直至提添加成功。 再次查看节点列表和集群健康状态 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 7cdd9649a07e40fb: name=etcd4 peerURLs=http://192.168.0.94:2380 clientURLs=http://192.168.0.94:2379 isLeader=false adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member 7cdd9649a07e40fb is healthy: got healthy result from http://192.168.0.94:2379 member adff72f24ac33f4b is healthy: got healthy result from https://192.168.0.91:2379 member c883f9e325d8667d is healthy: got healthy result from https://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 可以看到集群已经是健康状态，但是peerURLs、clientURLs 都还不是https安全模式，下面就要修改为安全模式 先看下日志 [root@etcd4 ~]# journalctl -xe Jan 27 11:52:53 etcd4 etcd[3657]: could not get cluster response from https://192.168.0.92:2380: Get https://192.168.0.92:2380/members Jan 27 11:52:53 etcd4 etcd[3657]: could not get cluster response from https://192.168.0.93:2380: Get https://192.168.0.93:2380/members Jan 27 11:52:53 etcd4 etcd[3657]: cannot fetch cluster info from peer urls: could not retrieve cluster information from the given urls Jan 27 11:52:53 etcd4 systemd[1]: etcd.service: main process exited, code=exited, status=1/FAILURE Jan 27 11:52:53 etcd4 systemd[1]: Failed to start Etcd Server. 出现上面报错没有关系，继续进行下面操作：修改为安全模式 8.5、开启集群peer安全模式 修改etcd4节点的peer url为https etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member update 7cdd9649a07e40fb https://192.168.0.4:2380 执行结果： [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member update 7cdd9649a07e40fb https://192.168.0.4:2380 Updated member with ID 7cdd9649a07e40fb in cluster 修改etcd4的peer工作端口为https；同时修改client工作端口为https，修改client url为https，带上证书 cat >/etc/etcd/etcd.conf << EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.94:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.94:2379,http://127.0.0.1:2379" ETCD_NAME="etcd4" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.94:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.94:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380,etcd4=https://192.168.0.94:2380" ETCD_INITIAL_CLUSTER_STATE="existing" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #集群内部互相通信用的证书 ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd4-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd4-peer-key.pem" # 开启集群内部客户端认证 ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" # 开启集群外部服务端认证 ETCD_CERT_FILE="/etc/etcd/pki/etcd4.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd4-key.pem" # 开启集群外部客户端认证 ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 启动 systemctl daemon-reload && systemctl restart etcd 查看节点列表和集群健康状态 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 7cdd9649a07e40fb: name=etcd4 peerURLs=https://192.168.0.94:2380 clientURLs=http://192.168.0.94:2379 isLeader=false adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member 7cdd9649a07e40fb is healthy: got healthy result from https://192.168.0.94:2379 member adff72f24ac33f4b is healthy: got healthy result from https://192.168.0.91:2379 member c883f9e325d8667d is healthy: got healthy result from https://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 如果看到etcd4节点peerURLs已经是https模式了 注意：如果发现peerURLs不是https，原因在于执行"修改etcd3节点的peer url为https步骤"的时候掉了步骤最后面的https://192.168.0.93:2380 或者ID不正确，重新执行几遍即可 在etcd4节点上查看日志 [root@etcd4 ~]# journalctl -xe Jan 27 13:25:06 etcd4 etcd[3926]: rejected connection from "192.168.0.91:55218" (error "tls: first record does not look like a TLS han Jan 27 13:25:06 etcd4 etcd[3926]: rejected connection from "192.168.0.91:55220" (error "tls: first record does not look like a TLS han Jan 27 13:25:06 etcd4 etcd[3926]: rejected connection from "192.168.0.93:42674" (error "tls: first record does not look like a TLS han Jan 27 13:25:06 etcd4 etcd[3926]: rejected connection from "192.168.0.93:42676" (error "tls: first record does not look like a TLS han 让然有报错，需要修改所有节点一致 8.6、修改所有节点配置文件一致并重启 主要修改http改成https：ETCD_INITIAL_CLUSTER="etcd4=https://192.168.0.94:2380" 修改etcd1 cat > /etc/etcd/etcd.conf<< EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.91:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.91:2379,http://127.0.0.1:2379" ETCD_NAME="etcd1" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.91:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.91:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380,etcd4=https://192.168.0.94:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_CERT_FILE="/etc/etcd/pki/etcd1.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd1-key.pem" ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd1-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd1-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 修改etcd2 cat > /etc/etcd/etcd.conf<< EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.92:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.92:2379,http://127.0.0.1:2379" ETCD_NAME="etcd2" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.92:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.92:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380,etcd4=https://192.168.0.94:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_CERT_FILE="/etc/etcd/pki/etcd2.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd2-key.pem" ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd2-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd2-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 修改etcd3 cat > /etc/etcd/etcd.conf<< EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.93:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.93:2379,http://127.0.0.1:2379" ETCD_NAME="etcd3" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.93:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.93:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380,etcd4=https://192.168.0.94:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_CERT_FILE="/etc/etcd/pki/etcd3.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd3-key.pem" ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd3-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd3-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 修改etcd4 cat > /etc/etcd/etcd.conf<< EOF ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.0.93:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.0.93:2379,http://127.0.0.1:2379" ETCD_NAME="etcd3" ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.93:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.93:2379" ETCD_INITIAL_CLUSTER="etcd1=https://192.168.0.91:2380,etcd2=https://192.168.0.92:2380,etcd3=https://192.168.0.93:2380,etcd4=https://192.168.0.94:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_CERT_FILE="/etc/etcd/pki/etcd4.pem" ETCD_KEY_FILE="/etc/etcd/pki/etcd4-key.pem" ETCD_CLIENT_CERT_AUTH="true" ETCD_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" ETCD_PEER_CERT_FILE="/etc/etcd/pki/etcd3-peer.pem" ETCD_PEER_KEY_FILE="/etc/etcd/pki/etcd3-peer-key.pem" ETCD_PEER_CLIENT_CERT_AUTH="true" ETCD_PEER_TRUSTED_CA_FILE="/etc/etcd/pki/rootca.pem" EOF 重启 systemctl daemon-reload && systemctl restart etcd 查看节点列表和集群健康状态 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true c775cff37a58077c: name=etcd4 peerURLs=https://192.168.0.94:2380 clientURLs=https://192.168.0.94:2379 isLeader=false c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem cluster-health member adff72f24ac33f4b is healthy: got healthy result from https://192.168.0.91:2379 member c775cff37a58077c is healthy: got healthy result from https://192.168.0.94:2379 member c883f9e325d8667d is healthy: got healthy result from https://192.168.0.93:2379 member c96f41ba37a00a16 is healthy: got healthy result from https://192.168.0.92:2379 cluster is healthy 可以看到全部是https模式 在etcd4节点上查看日志 [root@etcd4 ~]# journalctl -xe Jan 27 16:57:45 etcd4 etcd[5902]: rejected connection from "192.168.0.93:39910" (error "EOF", ServerName "") Jan 27 16:57:45 etcd4 etcd[5902]: rejected connection from "192.168.0.93:39914" (error "EOF", ServerName "") Jan 27 16:57:46 etcd4 etcd[5902]: peer c883f9e325d8667d became active Jan 27 16:57:46 etcd4 etcd[5902]: established a TCP streaming connection with peer c883f9e325d8667d (stream MsgApp v2 reader) Jan 27 16:57:46 etcd4 etcd[5902]: established a TCP streaming connection with peer c883f9e325d8667d (stream Message reader) 仍然报错，暂时未解决，不影响使用 9、删除成员 注意：删除成员是针对新成员来说的，对于原有集群成员，不能随便删除，因为已经有很多数据。如果必须删除，需要做备份迁移后才可以删除 例如要删除etcd4成员 先查看成员列表 [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member list 1da3d0181b2c051: name=etcd4 peerURLs=http://192.168.0.94:2380 clientURLs=http://192.168.0.94:2379 isLeader=false adff72f24ac33f4b: name=etcd1 peerURLs=https://192.168.0.91:2380 clientURLs=https://192.168.0.91:2379 isLeader=true c883f9e325d8667d: name=etcd3 peerURLs=https://192.168.0.93:2380 clientURLs=https://192.168.0.93:2379 isLeader=false c96f41ba37a00a16: name=etcd2 peerURLs=https://192.168.0.92:2380 clientURLs=https://192.168.0.92:2379 isLeader=false 剔除成员 etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member remove 1da3d0181b2c051 执行结果： [root@etcd1 ~]# etcdctl --ca-file /etc/etcd/pki/rootca.pem --cert-file /etc/etcd/pki/etcdctl.pem --key-file /etc/etcd/pki/etcdctl-key.pem member remove 1da3d0181b2c051 Removed member 1da3d0181b2c051 from cluster 停掉etcd服务 systemctl stop etcd 删除成员目录 rm -rf /var/lib/etcd/default.etcd 如果上面不按顺序来，再次添加完成员客户端是无法启动的，会报如下错误，看里面提示 the data-dir used by this member must be removed. [root@etcd4 ~]# systemctl daemon-reload && systemctl restart etcd [root@etcd4 ~]# systemctl status etcd -l ● etcd.service - Etcd Server Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled) Active: inactive (dead) since Sun 2019-01-27 14:38:29 CST; 1s ago Process: 4503 ExecStart=/bin/bash -c GOMAXPROCS=$(nproc) /usr/bin/etcd --name="${ETCD_NAME}" --data-dir="${ETCD_DATA_DIR}" --listen-client-urls="${ETCD_LISTEN_CLIENT_URLS}" (code=exited, status=0/SUCCESS) Main PID: 4503 (code=exited, status=0/SUCCESS) Jan 27 14:38:29 etcd4 etcd[4503]: the data-dir used by this member must be removed. Jan 27 14:38:29 etcd4 etcd[4503]: aborting publish because server is stopped Jan 27 14:38:29 etcd4 etcd[4503]: stopping peer c96f41ba37a00a16... Jan 27 14:38:29 etcd4 etcd[4503]: stopped streaming with peer c96f41ba37a00a16 (writer) Jan 27 14:38:29 etcd4 etcd[4503]: stopped streaming with peer c96f41ba37a00a16 (writer) Jan 27 14:38:29 etcd4 etcd[4503]: stopped HTTP pipelining with peer c96f41ba37a00a16 Jan 27 14:38:29 etcd4 etcd[4503]: stopped streaming with peer c96f41ba37a00a16 (stream MsgApp v2 reader) Jan 27 14:38:29 etcd4 etcd[4503]: stopped streaming with peer c96f41ba37a00a16 (stream Message reader) Jan 27 14:38:29 etcd4 etcd[4503]: stopped peer c96f41ba37a00a16 Jan 27 14:38:29 etcd4 systemd[1]: Started Etcd Server. 参照文档： https://www.jianshu.com/p/3015d514bae3 https://lprincewhn.github.io/2018/09/15/etcd-ha-pki-01.html http://www.mamicode.com/info-detail-1737556.html http://www.cnblogs.com/breg/p/5728237.html