Install Percona XtraDB Cluster using kubectl

The kubectl command line utility is a tool used before anything else to interact with Kubernetes and containerized applications running on it. Users can run kubectl to deploy applications, manage cluster resources, check logs, etc.

Pre-requisites

The following tools are used in this guide and therefore should be preinstalled:

1. The Git distributed version control system. You can install it following the official installation instructions.

2. The kubectl tool to manage and deploy applications on Kubernetes, included in most Kubernetes distributions. Install it, if not present, following the official installation instructions.

Install the Operator and Percona XtraDB Cluster

The following steps are needed to deploy the Operator and Percona XtraDB Cluster in your Kubernetes environment:

1. Deploy the Operator with the following command:

   $ kubectl apply -f https://raw.githubusercontent.com/percona/percona-xtradb-cluster-operator/v1.12.0/deploy/bundle.yaml
   

   Expected output

   customresourcedefinition.apiextensions.k8s.io/perconaxtradbclusters.pxc.percona.com created
   customresourcedefinition.apiextensions.k8s.io/perconaxtradbclusterbackups.pxc.percona.com created
   customresourcedefinition.apiextensions.k8s.io/perconaxtradbclusterrestores.pxc.percona.com created
   customresourcedefinition.apiextensions.k8s.io/perconaxtradbbackups.pxc.percona.com created
   role.rbac.authorization.k8s.io/percona-xtradb-cluster-operator created
   serviceaccount/percona-xtradb-cluster-operator created
   rolebinding.rbac.authorization.k8s.io/service-account-percona-xtradb-cluster-operator created
   deployment.apps/percona-xtradb-cluster-operator created
   

   As the result you will have the Operator Pod up and running.

2. Deploy Percona XtraDB Cluster:

   $ kubectl apply -f https://raw.githubusercontent.com/percona/percona-xtradb-cluster-operator/v1.12.0/deploy/cr.yaml
   

   Expected output

   perconaxtradbcluster.pxc.percona.com/ cluster1 created
   

   Note

   This deploys default Percona XtraDB Cluster configuration with three HAProxy and three XtraDB Cluster instances. Please see deploy/cr.yaml and Custom Resource Options for the configuration options. You can clone the repository with all manifests and source code by executing the following command:

   $ git clone -b v1.12.0 https://github.com/percona/percona-xtradb-cluster-operator
   

   After editing the needed options, apply your modified deploy/cr.yaml file as follows:

   $ kubectl apply -f deploy/cr.yaml
   

   The creation process may take some time. When the process is over your cluster will obtain the ready status. You can check it with the following command:

   $ kubectl get pxc
   

   Expected output

   NAME       ENDPOINT                   STATUS   PXC   PROXYSQL   HAPROXY   AGE
   cluster1   cluster1-haproxy.default   ready    3                3         5m51s
   

Verifying the cluster operation

It may take ten minutes to get the cluster started. When kubectl get pxc command finally shows you the cluster status as ready, you can try to connect to the cluster.

1. You will need the login and password for the admin user to access the cluster. Use kubectl get secrets command to see the list of Secrets objects (by default the Secrets object you are interested in has cluster1-secrets name). You can use the following command to get the password of the root user:

   $ kubectl get secrets cluster1-secrets -o yaml -o jsonpath='{.data.root}' | base64 --decode | tr '\n' ' ' && echo " "
   

2. Run a container with mysql tool 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
   

   Executing it may require some time to deploy the correspondent Pod.

3. Now run mysql tool in the percona-client command shell using the password obtained from the secret. The command will look different depending on whether your cluster provides load balancing with HAProxy (the default choice) or ProxySQL:

   with HAProxy (default)with ProxySQL

   $ mysql -h cluster1-haproxy -uroot -proot_password
   

   $ mysql -h cluster1-proxysql -uroot -proot_password
   

Contact Us

For free technical help, visit the Percona Community Forum.

To report bugs or submit feature requests, open a JIRA ticket.

For paid support and managed or consulting services , contact Percona Sales.

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Last update: 2023-02-09