StatefulSet

Advanced StatefulSet from PingCAP.

https://github.com/q8s-io/statefulset-pingcap

import development

package main

import (
	"github.com/q8s-io/statefulset-pingcap/client/apis/apps/v1"
)

run advanced statefulset controller locally

Open a new terminal and run controller:

sh hack/build.sh

kubectl --kubeconfig kubeconfig apply -f manifests/crd.v1.yaml

kubectl --kubeconfig kubeconfig -n kube-system delete ep advanced-statefulset-controller --ignore-not-found

./tmp/statefulset-pingcap-controller-manager --kubeconfig kubeconfig -v 4 --leader-elect-resource-name advanced-statefulset-controller --leader-elect-resource-namespace kube-system

deploy a statefulset

kubectl apply -f examples/statefulset.yaml

scale out

Note that --resource-version is required for CRD objects.

RESOURCE_VERSION=$(kubectl get statefulsets.pingcap.com web -ojsonpath='{.metadata.resourceVersion}')

kubectl scale --resource-version=$RESOURCE_VERSION --replicas=4 statefulsets.pingcap.com web

scale in

RESOURCE_VERSION=$(kubectl get statefulsets.pingcap.com web -ojsonpath='{.metadata.resourceVersion}')

kubectl scale --resource-version=$RESOURCE_VERSION --replicas=3 statefulsets.pingcap.com web

scale in at arbitrary position

We should set delete-slots annotations and decrement spec.replicas at the same time.

kubectl apply -f examples/scale-in-statefulset.yaml