在Kubernetes上安装MySQL-PXC集群

官方部署文档地址：https://www.percona.com/doc/kubernetes-operator-for-pxc/kubernetes.html

一、部署方式

示例在k8s集群（至少3个节点）中部署Percona XtraDB Cluster集群

• clone项目

git clone  https://gitee.com/Aaron-23/percona-xtradb-cluster-operator.git
cd percona-xtradb-cluster-operator

• 准备存储

当前环境具有三个k8s node节点，每个node节点/var/lib/data目录有100GB存储空间

所有存储均使用本地存储

创建local-storageclass

cd storage
kubectl create -f local-sc.yaml

创建pv

修改values值为各pxc节点ip,spec.local.path路径根据实际情况自定义，

kubectl create -f pv-data-172.yaml
kubectl create -f pv-data-173.yaml
kubectl create -f pv-data-174.yaml

• 创建crd资源

 kubectl apply -f deploy/crd.yaml

• 创建ns

 kubectl create namespace pxc
 kubectl config set-context $(kubectl config current-context) --namespace=pxc

• 赋予rbac权限

kubectl apply -f deploy/rbac.yaml

• 在Kubernetes中启动operator

kubectl apply -f deploy/operator.yaml

• 使用secrets.管理Percona XtraDB集群相关秘钥

需要设置数据库密码的修改secrets中密码即可

 kubectl create -f deploy/secrets.yaml

• 创建Percona XtraDB Cluster

kubectl apply -f deploy/cr.yaml

创建过程将花费一些时间。当po和副本数都达到“Running”状态时，该过程结束：

$ kubectl get pods
NAME                                              READY   STATUS    RESTARTS   AGE
cluster1-haproxy-0                                1/1     Running   0          5m
cluster1-haproxy-1                                1/1     Running   0          5m
cluster1-haproxy-2                                1/1     Running   0          5m
cluster1-pxc-0                                    1/1     Running   0          5m
cluster1-pxc-1                                    1/1     Running   0          4m
cluster1-pxc-2                                    1/1     Running   0          2m
percona-xtradb-cluster-operator-dc67778fd-qtspz   1/1     Running   0          6m

• 检查与新创建集群的连接

 $ kubectl run -i --rm --tty percona-client --image=percona:8.0 --restart=Never -- bash -il
percona-client:/$ mysql -h cluster1-haproxy -uroot -proot_password
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1976
Server version: 8.0.19-10 Percona XtraDB Cluster (GPL), Release rel10, Revision 727f180, WSREP version 26.4.3

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