参考文献：
https://ywnz.com/linuxyffq/2530.html
运行在每个节点上，监听 API Server 中服务对象的变化，再通过管理 IPtables 来实现网络的转发
Kube-Proxy 目前支持三种模式：
- UserSpace
- k8s v1.2 后就已经淘汰
- IPtables
- 目前默认方式
- IPVS--推荐，支持7层
- 需要安装ipvsadm、ipset 工具包和加载 ip_vs 内核模块
kube-proxy部署在hdss7-21,hdss7-22上：
1.hdss7-21安装
[root@hdss7-21 ~]# yum install ipset -y
[root@hdss7-21 conf]# yum -y install ipvsadm
[root@hdss7-21 ~]# cd /opt/kubernetes/server/bin/cert/
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/kube-proxy-client-key.pem ./
root@hdss7-200's password:
kube-proxy-client-key.pem 100% 1679 1.2MB/s 00:00
[root@hdss7-21 cert]# scp hdss7-200:/opt/certs/kube-proxy-client.pem ./
root@hdss7-200's password:
kube-proxy-client.pem
[root@hdss7-21 cert]# cd /opt/kubernetes/server/bin/conf
kubectl config set-cluster myk8s
--certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem
--embed-certs=true
--server=https://192.168.12.10:7443
--kubeconfig=kube-proxy.kubeconfig
[root@hdss7-21 conf]# kubectl config set-credentials kube-proxy
--client-certificate=/opt/kubernetes/server/bin/cert/kube-proxy-client.pem
--client-key=/opt/kubernetes/server/bin/cert/kube-proxy-client-key.pem
--embed-certs=true
--kubeconfig=kube-proxy.kubeconfig
[root@hdss7-21 conf]# kubectl config set-context myk8s-context
--cluster=myk8s
--user=kube-proxy
--kubeconfig=kube-proxy.kubeconfig
[root@hdss7-21 conf]# kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig
[root@hdss7-21 conf]# cat /root/ipvs.sh 编辑开启ipvs内核的脚本：
#!/bin/bash
ipvs_mods_dir="/usr/lib/modules/$(uname -r)/kernel/net/netfilter/ipvs"
for i in $(ls $ipvs_mods_dir|grep -o "^[^.]*")
do
/sbin/modinfo -F filename $i &>/dev/null
if [ $? -eq 0 ];then
/sbin/modprobe $i
fi
done
[root@hdss7-21 conf]# chmod +x /root/ipvs.sh
[root@hdss7-21 conf]# sh /root/ipvs.sh
[root@hdss7-21 conf]# cat /opt/kubernetes/server/bin/kube-proxy.sh
#!/bin/sh
./kube-proxy
--cluster-cidr 172.7.0.0/16
--hostname-override hdss7-21.host.com
--proxy-mode=ipvs
--ipvs-scheduler=nq
--kubeconfig ./conf/kube-proxy.kubeconfig
[root@hdss7-21 conf]# chmod +x /opt/kubernetes/server/bin/kube-proxy.sh
[root@hdss7-21 conf]# mkdir -p /data/logs/kubernetes/kube-proxy
[root@hdss7-21 conf]# vi /etc/supervisord.d/kube-proxy.ini
[root@hdss7-21 conf]# cat /etc/supervisord.d/kube-proxy.ini
[program:kube-proxy-7-21]
command=/opt/kubernetes/server/bin/kube-proxy.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/kubernetes/kube-proxy/proxy.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
[root@hdss7-21 conf]# supervisorctl status
etcd-server-7-21 RUNNING pid 1297, uptime 4:27:30
kube-apiserver-7-21 RUNNING pid 48809, uptime 0:40:56
kube-controller-manager-7-21 RUNNING pid 48870, uptime 0:40:44
kube-kubelet-7-21 RUNNING pid 28120, uptime 2:23:34
kube-proxy-7-21 RUNNING pid 55497, uptime 0:00:32
kube-scheduler-7-21 RUNNING pid 48860, uptime 0:40:45
[root@hdss7-21 conf]# vi /root/nginx-ds.yaml
[root@hdss7-21 conf]# kubectl create -f /root/nginx-ds.yaml 只需在21机器创建即可
2.hdss7-22安装
[root@hdss7-22 ~]# yum install ipset -y
[root@hdss7-22 conf]# yum -y install ipvsadm
[root@hdss7-22 ~]# cd /opt/kubernetes/server/bin/cert/
[root@hdss7-22 cert]# scp hdss7-200:/opt/certs/kube-proxy-client-key.pem ./
root@hdss7-200's password:
kube-proxy-client-key.pem 100% 1679 1.0MB/s 00:00
[root@hdss7-22 cert]# scp hdss7-200:/opt/certs/kube-proxy-client.pem ./
root@hdss7-200's password:
kube-proxy-client.pem
[root@hdss7-22 cert]# cd /opt/kubernetes/server/bin/conf
[root@hdss7-22 conf]# ll
total 16
-rw-r--r-- 1 root root 2223 Jun 6 16:01 audit.yaml
-rw-r--r-- 1 root root 258 Jun 6 19:32 k8s-node.yaml
-rw------- 1 root root 6175 Jun 7 10:55 kubelet.kubeconfig
[root@hdss7-22 conf]# kubectl config set-cluster myk8s
> --certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem
> --embed-certs=true
> --server=https://192.168.12.10:7443
> --kubeconfig=kube-proxy.kubeconfig
Cluster "myk8s" set.
[root@hdss7-22 conf]# kubectl config set-credentials kube-proxy
> --client-certificate=/opt/kubernetes/server/bin/cert/kube-proxy-client.pem
> --client-key=/opt/kubernetes/server/bin/cert/kube-proxy-client-key.pem
> --embed-certs=true
> --kubeconfig=kube-proxy.kubeconfig
User "kube-proxy" set.
[root@hdss7-22 conf]# kubectl config set-context myk8s-context
> --cluster=myk8s
> --user=kube-proxy
> --kubeconfig=kube-proxy.kubeconfig
Context "myk8s-context" created.
[root@hdss7-22 conf]# kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig
Switched to context "myk8s-context".
[root@hdss7-22 conf]# vi /root/ipvs.sh
[root@hdss7-22 conf]# cat /root/ipvs.sh
#!/bin/bash
ipvs_mods_dir="/usr/lib/modules/$(uname -r)/kernel/net/netfilter/ipvs"
for i in $(ls $ipvs_mods_dir|grep -o "^[^.]*")
do
/sbin/modinfo -F filename $i &>/dev/null
if [ $? -eq 0 ];then
/sbin/modprobe $i
fi
done
[root@hdss7-22 conf]# chmod +x /root/ipvs.sh
[root@hdss7-22 conf]# sh /root/ipvs.sh
[root@hdss7-22 conf]# vi /opt/kubernetes/server/bin/kube-proxy.sh
[root@hdss7-22 conf]# cat /opt/kubernetes/server/bin/kube-proxy.sh
#!/bin/sh
./kube-proxy
--cluster-cidr 172.7.0.0/16
--hostname-override hdss7-22.host.com
--proxy-mode=ipvs
--ipvs-scheduler=nq
--kubeconfig ./conf/kube-proxy.kubeconfig
[root@hdss7-22 conf]# mkdir -p /data/logs/kubernetes/kube-proxy
[root@hdss7-22 conf]# vi /etc/supervisord.d/kube-proxy.ini
[root@hdss7-22 conf]# cat /etc/supervisord.d/kube-proxy.ini
[program:kube-proxy-7-22]
command=/opt/kubernetes/server/bin/kube-proxy.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/kubernetes/kube-proxy/proxy.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
[root@hdss7-22 conf]#
[root@hdss7-22 conf]# supervisorctl update
kube-proxy-7-22: added process group
3 hdss7-200申请证书
[root@hdss7-200 certs]# cat /opt/certs/kube-proxy-csr.json
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client kube-proxy-csr.json |cfssl-json -bare kube-proxy-client
原文已同步语雀