ingress-nginx代理tcp使其能外部访问mysql

一、helm部署mysql主从复制

helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo update

helm pull bitnami/mysql

解压后编辑values.yaml文件，修改如下（storageclass已设置默认类）

 117 ## @param architecture MySQL architecture (`standalone` or `replication`)118 ##119 architecture: replication120 ## MySQL Authentication parameters121 ##122 auth:123   ## @param auth.rootPassword Password for the `root` user. Ignored if existing secret is provided124   ## ref: https://github.com/bitnami/containers/tree/main/bitnami/mysql#setting-the-root-password-on-first-run125   ##126   rootPassword: "abc123456"127   ## @param auth.createDatabase Whether to create the .Values.auth.database or not128   ## ref: https://github.com/bitnami/containers/tree/main/bitnami/mysql#creating-a-database-on-first-run129   ##130   createDatabase: true131   ## @param auth.database Name for a custom database to create132   ## ref: https://github.com/bitnami/containers/tree/main/bitnami/mysql#creating-a-database-on-first-run133   ##134   database: "my_database"135   ## @param auth.username Name for a custom user to create136   ## ref: https://github.com/bitnami/containers/tree/main/bitnami/mysql#creating-a-database-user-on-first-run137   ##138   username: ""139   ## @param auth.password Password for the new user. Ignored if existing secret is provided140   ##141   password: ""142   ## @param auth.replicationUser MySQL replication user143   ## ref: https://github.com/bitnami/containers/tree/main/bitnami/mysql#setting-up-a-replication-cluster144   ##145   replicationUser: replicator146   ## @param auth.replicationPassword MySQL replication user password. Ignored if existing secret is provided147   ##148   replicationPassword: "abc123456"

安装

helm install mysql ./mysql -n mysql --create-namespace

二、添加ingress控制器tcp配置

[root@k8s-master01 mysql]# kubectl get daemonset,pods -n ingress-nginx
NAME                                      DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR                         AGE
daemonset.apps/ingress-nginx-controller   1         1         1       1            1           ingress=true,kubernetes.io/os=linux   20hNAME                                 READY   STATUS    RESTARTS   AGE
pod/ingress-nginx-controller-xcn5q   1/1     Running   0          9m46s

这里使用的是daemonset方式部署的,如果是deployment，需要将daemonset修改成deployment

kubectl edit daemonset ingress-nginx-controller -n ingress-nginx

添加tcp配置

- --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services

三、编写相应的configmap

查看当前mysql服务

[root@k8s-master01 mysql]# kubectl get pods,svc -n mysql
NAME                    READY   STATUS    RESTARTS   AGE
pod/mysql-primary-0     1/1     Running   0          73m
pod/mysql-secondary-0   1/1     Running   0          73mNAME                               TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
service/mysql-primary              ClusterIP   10.102.29.24    <none>        3306/TCP   73m
service/mysql-primary-headless     ClusterIP   None            <none>        3306/TCP   73m
service/mysql-secondary            ClusterIP   10.106.87.104   <none>        3306/TCP   73m
service/mysql-secondary-headless   ClusterIP   None            <none>        3306/TCP   73m

编写configmap，注意当前namespace为mysql

vim mysql-tcp-cm.yaml

kind: ConfigMap
apiVersion: v1
metadata:name: tcp-servicesnamespace: ingress-nginx
data:"30306": "mysql/mysql-primary:3306""30307": "mysql/mysql-secondary:3306"

应用configmap