Install Percona XtraDB Cluster on Minikube

Installing the Percona Operator for MySQL based on Percona XtraDB Cluster on minikube is the easiest way to try it locally without a cloud provider. Minikube runs Kubernetes on GNU/Linux, Windows, or macOS system using a system-wide hypervisor, such as VirtualBox, KVM/QEMU, VMware Fusion or Hyper-V. Using it is a popular way to test the Kubernetes application locally prior to deploying it on a cloud.

The following steps are needed to run the Operator and Percona XtraDB Cluster on Minikube:

1. Install Minikube, using a way recommended for your system. This includes the installation of the following three components:

   1. kubectl tool,

   2. a hypervisor, if it is not already installed,

   3. actual Minikube package.

   After the installation, run minikube start --memory=4096 --cpus=3 (parameters increase the virtual machine limits for the CPU cores and memory, to ensure stable work of the Operator). Being executed, this command will download needed virtualized images, then initialize and run the cluster.

2. 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
   

3. Deploy Percona XtraDB Cluster:

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

   Note

   This deploys one Percona XtraDB Cluster node and one HAProxy node. The deploy/cr-minimal.yaml is for minimal non-production deployment. For more configuration options please see deploy/cr.yaml and Custom Resource 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
   

   Creation process will 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 minimal-cluster-secrets name). You can use the following command to get the password of the root user:

   $ kubectl get secrets minimal-cluster-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 minimal-cluster-haproxy -uroot -proot_password
   

   $ mysql -h minimal-cluster-proxysql -uroot -proot_password
   

   This command will connect you to the MySQL server.

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Last update: 2023-02-09