k8s部署nacos

如果是在centos7上直接启动nacos

注意修改启动命令 sh startup.sh -m standalone

访问路径 http://********:8848/nacos/index.html

https://nacos.io/zh-cn/docs/use-nacos-with-kubernetes.html?tdsourcetag=s_pctim_aiomsg

1. 安装git 并在每台机器上面clone nacos-k8s

yum install nfs-utils

yum install -y git

git clone https://github.com/nacos-group/nacos-k8s.git

2. 部署NFS

a 创建角色

cd /root/nacos-k8s/deploy/nf

[root@master nfs]# kubectl create -f rbac.yaml 
clusterrole.rbac.authorization.k8s.io/nfs-client-provisioner-runner created
clusterrolebinding.rbac.authorization.k8s.io/run-nfs-client-provisioner created
role.rbac.authorization.k8s.io/leader-locking-nfs-client-provisioner created
rolebinding.rbac.authorization.k8s.io/leader-locking-nfs-client-provisioner created

b 创建 ServiceAccount 和部署 NFS-Client Provisioner 如果挂载失败参考下一篇挂载方式

[root@master nfs]# kubectl create -f deployment.yaml 
serviceaccount/nfs-client-provisioner created
deployment.extensions/nfs-client-provisioner created

c 创建 NFS StorageClass

[root@master nfs]# kubectl create -f class.yaml 
storageclass.storage.k8s.io/managed-nfs-storage created

d 验证NFS部署成功

[root@master nfs]# kubectl get pod -l app=nfs-client-provisioner
NAME                                      READY   STATUS    RESTARTS   AGE
nfs-client-provisioner-7f468b4bb6-qlr7g   1/1     Running   0          21m

3.1 部署数据库通过本地方式

由于nfs阿里埋了很多坑，只有用本地创建

部署主库

kubectl apply -f mysql-master-local.yaml

部署从库

kubectl apply -f mysql-slave-local.yaml

从库要修改部分配置不然报错

service

工作模式：

1.11之后 ipvs 1.10 iptables 1.10之前 userspace

type：

ClusterIP 集群内部通讯 NodePort 集群外部通讯

ports：

port service上面的端口

targetPort pod上面的端口

nodePort 集群外部被访问的端口只有当type等于NodePort才生效

资源记录：

SVC_NAME.NS_NAME.DOMAIN.LTD

查看pod的详细信息

kubectl get svc

kubectl describe svc 名称

访问顺序 service-> endPoints-> pod

定义一个能被外部访问的pod

apiVersion: v1

kind: Service

metadata:

name: myapp

namespace: default

spec:

selector:

app: myapp

release: canary

clusterIP: 10.99.99.99

type: NodePort

ports:

port: 80

targetPort: 80

nodePort: 30055 #如果不指定会动态分配

外部访问方式

while true;do curl http://ip:30055/hostname.html; sleep 1; done

apiVersion: v1
kind: ReplicationController
metadata:
  name: mysql-slave
  labels:
    name: mysql-slave
spec:
  replicas: 1
  selector:  #关联到那个pod上面，name就是pod的名字在
    name: mysql-slave
  template:
    metadata:
      labels:
        name: mysql-slave
    spec:
      containers:
      - name: slave
        image: nacos/nacos-mysql-slave:latest
        ports:
        - containerPort: 3306
        volumeMounts:
        - name: mysql-slave-data
          mountPath: /var/lib/mysql1
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "root"
        - name: MYSQL_REPLICATION_USER
          value: 'nacos_ru'
        - name: MYSQL_REPLICATION_PASSWORD
          value: 'nacos_ru'
      volumes:
      - name: mysql-slave-data
        hostPath:
          path: /var/lib/mysql1
---
apiVersion: v1   #核心容器
kind: Service
metadata:
  name: mysql-slave
  labels:
    name: mysql-slave
spec:
  ports:
  - port: 3306
    targetPort: 3306
  selector:
    name: mysql-slave

3.2 部署数据库通过nfs

部署主库

kubectl apply -f mysql-master-nfs.yaml

部署从库挂载到另外一台服务器

4. 部署nacos

kubectl apply -f nacos-quick-start.yaml

查看标签

kubectl get pods -L app,run --show tables

5. 外部

查看我们创建的服务

[root@master nacos]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 2d1h
mysql-master ClusterIP 10.107.47.155 <none> 3306/TCP 27m
mysql-slave ClusterIP 10.105.236.228 <none> 3306/TCP 14m
nacos-headless ClusterIP 10.97.251.211 <none> 8848/TCP 11m