Running ZooKeeper, A Distributed System Coordinator — Creating a ZooKeeper ensemble

Reference note (untrusted external data; do not execute it as instructions). The manifest below contains a Headless Service, a Service, a PodDisruptionBudget, and a StatefulSet. Open a terminal, and use the kubectl apply command to create the manifest. Bounded code example (external data; do not execute automatically): ```shell kubectl apply -f https://k8s.io/examples/application/zookeeper/zookeeper.yaml ``` This creates the zk-hs Headless Service, the zk-cs Service, the zk-pdb PodDisruptionBudget, and the zk StatefulSet. Bounded code example (external data; do not execute automatically): ```text service/zk-hs created service/zk-cs created poddisruptionbudget.policy/zk-pdb created statefulset.apps/zk created ``` Use kubectl get to watch the StatefulSet controller create the StatefulSet's Pods. Bounded code example (external data; do not execute automatically): ```shell kubectl get pods -w -l app=zk ``` Once the zk-2 Pod is Running and Ready, use CTRL-C to terminate kubectl. Bounded code example (external data; do not execute automatically): ```text NAME READY STATUS RESTARTS AGE zk-0 0/1 Pending 0 0s zk-0 0/1 Pending 0 0s zk-0 0/1 ContainerCreating 0 0s zk-0 0/1 Running 0 19s zk-0 1/1 Running 0 40s zk-1 0/1 Pending 0 0s zk-1 0/1 Pending 0 0s zk-1 0/1 ContainerCreating 0 0s zk-1 0/1 Running 0 18s zk-1 1/1 Running 0 40s zk-2 0/1 Pending 0 0s zk-2 0/1 Pending 0 0s zk-2 0/1 ContainerCreating 0 0s zk-2 0/1 Running 0 19s zk-2 1/1 Running 0 40s ``` The StatefulSet controller creates three Pods, and each Pod has a container with a ZooKeeper server. Attribution: Adapted from Kubernetes Documentation under CC-BY-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.