Co-authored by Krishna K Chandrasekar, Jaya Karthik and Adam Roberts
The Operator Lifecycle Manager (OLM) extends Kubernetes to provide a declarative way to install, manage, and upgrade Operators on a cluster. Using OLM, we can create a catalog source that holds multiple operators that can be made available for installation from the Operator Hub. We will be using this approach (of many) of OLM. In depth understanding on OLM can be found here .
To install OLM in your cluster, execute
export olm_release=0.15.1
kubectl apply -f https://github.com/operator-framework/operator-lifecycle-manager/releases/download/${olm_release}/crds.yaml
kubectl apply -f https://github.com/operator-framework/operator-lifecycle-manager/releases/download/${olm_release}/olm.yamlMore detailed installation for OLM are available here
This is a guide to creating and deploying the memcached operator sample with webhook from scratch using the operator-sdk. The base documentations used are quickstart and admission webhook guides from the operator-sdk official documentation.
The complete memcached sample operator with the webhook can be found here.
First let's start with creating a sample memcached operator.
mkdir memcached-operator
cd memcached-operator
operator-sdk init --domain=example.com --repo=github.com/example-inc/memcached-operatorCreate a Memcached API
operator-sdk create api --group cache --version v1 --kind Memcached --resource=true --controller=trueBuild and push the operator image
make docker-build docker-push IMG=<some-registry>/<project-name>:<tag>Install the CRD and deploy the project to the cluster. …
