Percona Toolkit with Percona XtraDB Cluster on Kubernetes

I am running the Percona XtraDB Cluster with the Percona Operator For MySQL on Kubernetes.
Since for altering tables I need to use pt-online-schema-change I need to use the toolkit.
How do I use or install the toolkit for the database on Kubernetes. I cannot find any documentation for that

Please help.

You should be able to use the Docker container perconalab/percona-toolkit to launch a pod with the toolkit. You can also launch a pod with percona/percona-server but instead of starting the server, just bash into the container, install the toolkit and use that.