Ops-controller-manager Cluster Object

The Cluster object in the Ops Controller can be created and managed using opscli commands or YAML files.

Create Cluster Using opscli Command

To create a cluster directly using the create sub-command:

/usr/local/bin/opscli create cluster -i ~/.kube/config --name dev1 --namespace ops-system

This command creates a cluster named dev1 in the ops-system namespace, using the default kubeconfig file located at ~/.kube/config.

Create Cluster Using YAML File

Alternatively, you can define the Cluster object in a YAML file and apply it using kubectl. Here is an example YAML definition:

apiVersion: crd.chenshaowen.com/v1
kind: Cluster
metadata:
  name: dev1
  namespace: ops-system
spec:
  config: base64 encoded kubeadm config
  server: https://1.1.1.1:6443

In this YAML file:

• config: Should contain the base64-encoded kubeadm configuration.
• server: The address of the Kubernetes API server.

You can apply this file using the following command:

kubectl apply -f cluster.yaml

View Cluster Object Status

To view the status of the Cluster object, use the following command:

kubectl get cluster dev1 -n ops-system

This will return information about the Cluster object, including:

• NAME: The name of the cluster.
• SERVER: The address of the Kubernetes API server.
• VERSION: The Kubernetes version.
• NODE: The number of nodes.
• RUNNING: The number of running nodes.
• TOTALPOD: The total number of pods in the cluster.
• CERTDAYS: The remaining days of the cluster's certificate validity.
• STATUS: The current status of the cluster (e.g., successed).

Example output:

NAME   SERVER                     VERSION   NODE   RUNNING   TOTALPOD   CERTDAYS   STATUS
dev1   https://1.1.1.1:6443       v1.21.0   1      15        16         114        successed