Install Percona Server for MySQL on Kubernetes¶

First of all, clone the percona-server-mysql-operator repository:
```
$ git clone -b v0.6.0 https://github.com/percona/percona-server-mysql-operator
cd percona-server-mysql-operator
```
Note

It is crucial to specify the right branch with -b option while cloning the code on this step. Please be careful.
Now Custom Resource Definition for Percona Server for MySQL should be created from the deploy/crd.yaml file. Custom Resource Definition extends the standard set of resources which Kubernetes “knows” about with the new items (in our case ones which are the core of the operator). Apply it as follows:
```
$ kubectl apply --server-side -f deploy/crd.yaml
```
This step should be done only once; it does not need to be repeated with the next Operator deployments, etc.
The next thing to do is to add the mysql namespace to Kubernetes, not forgetting to set the correspondent context for further steps:
```
$ kubectl create namespace mysql
$ kubectl config set-context $(kubectl config current-context) --namespace=mysql
```
Note

You can use different namespace name or even stay with the Default one.
Now RBAC (role-based access control) for Percona Server for MySQL should be set up from the deploy/rbac.yaml file. Briefly speaking, role-based access is based on specifically defined roles and actions corresponding to them, allowed to be done on specific Kubernetes resources (details about users and roles can be found in Kubernetes documentation ).
```
$ kubectl apply -f deploy/rbac.yaml
```
Note

Setting RBAC requires your user to have cluster-admin role privileges. For example, those using Google Kubernetes Engine can grant user needed privileges with the following command: $ kubectl create clusterrolebinding cluster-admin-binding --clusterrole=cluster-admin --user=$(gcloud config get-value core/account)

Finally it’s time to start the operator within Kubernetes:
```
$ kubectl apply -f deploy/operator.yaml
```
Now that’s time to add the Percona Server for MySQL Users secrets to Kubernetes. They should be placed in the data section of the deploy/secrets.yaml file as logins and plaintext passwords for the user accounts (see Kubernetes documentation for details).

After editing is finished, users secrets should be created using the following command:
```
$ kubectl create -f deploy/secrets.yaml
```
More details about secrets can be found in Users.
Now certificates should be generated. By default, the Operator generates certificates automatically, and no actions are required at this step. Still, you can generate and apply your own certificates as secrets according to the TLS instructions.

After the operator is started and user secrets are added, Percona Server for MySQL can be created at any time with the following command:

$ kubectl apply -f deploy/cr.yaml

Creation process will take some time. The process is over when both operator and replica set pod have reached their Running status. kubectl get pods output should look like this:

NAME                                                 READY   STATUS    RESTARTS        AGE
cluster1-mysql-0                                     1/1     Running   0               7m6s
cluster1-mysql-1                                     1/1     Running   1 (5m39s ago)   6m4s
cluster1-mysql-2                                     1/1     Running   1 (4m40s ago)   5m7s
cluster1-orc-0                                       2/2     Running   0               7m6s
percona-server-for-mysql-operator-54c5c87988-xfmlf   1/1     Running   0               7m42s

Check connectivity to your newly created cluster. Run a MySQL client container and connect its console output to your terminal. The following command will do this, naming the new Pod percona-client:

$ kubectl run -i --rm --tty percona-client --image=percona:8.0 --restart=Never -- bash -il
percona-client:/$ mysql -h cluster1-mysql-primary -uroot -proot_password

This command will connect you to the MySQL monitor.

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 2268
Server version: 8.0.25-15 Percona Server (GPL), Release 15, Revision a558ec2

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Last update: 2024-03-22