karmada/pkg/karmadactl/cmdinit/utils/examples.go

package utils

import (
	"fmt"

	"k8s.io/klog/v2"
)

const (
	// https://github.com/karmada-io/karmada/blob/master/artifacts/agent
	karmadaAgent = `---
apiVersion: v1
kind: Namespace
metadata:
  name: karmada-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: karmada-agent
rules:
  - apiGroups: ['*']
    resources: ['*']
    verbs: ['*']
  - nonResourceURLs: ['*']
    verbs: ["get"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: karmada-agent
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: karmada-agent
subjects:
  - kind: ServiceAccount
    name: karmada-agent-sa
    namespace: karmada-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: karmada-agent-sa
  namespace: karmada-system
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: karmada-agent
  namespace: karmada-system
  labels:
    app: karmada-agent
spec:
  replicas: 1
  selector:
    matchLabels:
      app: karmada-agent
  template:
    metadata:
      labels:
        app: karmada-agent
    spec:
      serviceAccountName: karmada-agent-sa
      tolerations:
        - key: node-role.kubernetes.io/master
          operator: Exists
      containers:
        - name: karmada-agent
          image: swr.ap-southeast-1.myhuaweicloud.com/karmada/karmada-agent:latest
          command:
            - /bin/karmada-agent
            - --karmada-kubeconfig=/etc/kubeconfig/karmada-kubeconfig
            - --karmada-context=karmada
            - --cluster-name={member_cluster_name}
            - --cluster-status-update-frequency=10s
            - --v=4
          volumeMounts:
            - name: kubeconfig
              mountPath: /etc/kubeconfig
      volumes:
        - name: kubeconfig
          secret:
            secretName: karmada-kubeconfig`

	estimator = `apiVersion: apps/v1
kind: Deployment
metadata:
  name: karmada-scheduler-estimator-{{member_cluster_name}}
  namespace: karmada-system
  labels:
    cluster: {{member_cluster_name}}
spec:
  replicas: 1
  selector:
    matchLabels:
      app: karmada-scheduler-estimator-{{member_cluster_name}}
  template:
    metadata:
      labels:
        app: karmada-scheduler-estimator-{{member_cluster_name}}
    spec:
      tolerations:
        - key: node-role.kubernetes.io/master
          operator: Exists
      containers:
        - name: karmada-scheduler-estimator
          image: swr.ap-southeast-1.myhuaweicloud.com/karmada/karmada-scheduler-estimator:latest
          imagePullPolicy: IfNotPresent
          command:
            - /bin/karmada-scheduler-estimator
            - --kubeconfig=/etc/{{member_cluster_name}}-kubeconfig
            - --cluster-name={{member_cluster_name}}
          volumeMounts:
            - name: member-kubeconfig
              subPath: {{member_cluster_name}}-kubeconfig
              mountPath: /etc/{{member_cluster_name}}-kubeconfig
      volumes:
        - name: member-kubeconfig
          secret:
            secretName: {{member_cluster_name}}-kubeconfig
---
apiVersion: v1
kind: Service
metadata:
  name: karmada-scheduler-estimator-{{member_cluster_name}}
  namespace: karmada-system
  labels:
    cluster: {{member_cluster_name}}
spec:
  selector:
    app: karmada-scheduler-estimator-{{member_cluster_name}}
  ports:
    - protocol: TCP
      port: 10352
      targetPort: 10352`
)

//GenExamples Generate sample files
func GenExamples(path, parentCommand string) {
	if err := BytesToFile(path, "karmada-agent.yaml", []byte(karmadaAgent)); err != nil {
		klog.Warning(err)
	}

	// https://github.com/karmada-io/karmada/blob/master/artifacts/deploy/karmada-scheduler-estimator.yaml
	if err := BytesToFile(path, "karmada-scheduler-estimator.yaml", []byte(estimator)); err != nil {
		klog.Warning(err)
	}

	fmt.Printf(`
------------------------------------------------------------------------------------------------------
 █████   ████   █████████   ███████████   ██████   ██████   █████████   ██████████     █████████
░░███   ███░   ███░░░░░███ ░░███░░░░░███ ░░██████ ██████   ███░░░░░███ ░░███░░░░███   ███░░░░░███
 ░███  ███    ░███    ░███  ░███    ░███  ░███░█████░███  ░███    ░███  ░███   ░░███ ░███    ░███
 ░███████     ░███████████  ░██████████   ░███░░███ ░███  ░███████████  ░███    ░███ ░███████████
 ░███░░███    ░███░░░░░███  ░███░░░░░███  ░███ ░░░  ░███  ░███░░░░░███  ░███    ░███ ░███░░░░░███
 ░███ ░░███   ░███    ░███  ░███    ░███  ░███      ░███  ░███    ░███  ░███    ███  ░███    ░███
 █████ ░░████ █████   █████ █████   █████ █████     █████ █████   █████ ██████████   █████   █████
░░░░░   ░░░░ ░░░░░   ░░░░░ ░░░░░   ░░░░░ ░░░░░     ░░░░░ ░░░░░   ░░░░░ ░░░░░░░░░░   ░░░░░   ░░░░░
------------------------------------------------------------------------------------------------------
Karmada is installed successfully.

Register Kubernetes cluster to Karmada control plane.

Register cluster with 'Push' mode
                                                                                                                                                                             
Step 1: Use `+parentCommand+` join to register the cluster to Karmada control panel. --cluster-kubeconfig is members kubeconfig.
(In karmada)~# MEMBER_CLUSTER_NAME=%scat ~/.kube/config  | grep current-context | sed 's/: /\n/g'| sed '1d'%s
(In karmada)~# `+parentCommand+` --kubeconfig %s/karmada-apiserver.config  join ${MEMBER_CLUSTER_NAME} --cluster-kubeconfig=$HOME/.kube/config

Step 2: Show members of karmada
(In karmada)~# kubectl  --kubeconfig %s/karmada-apiserver.config get clusters


Register cluster with 'Pull' mode

Step 1:  Send karmada kubeconfig and karmada-agent.yaml to member kubernetes
(In karmada)~# scp %s/karmada-apiserver.config %s/karmada-agent.yaml {member kubernetes}:~
                                                                                                                                                                             
Step 2:  Create karmada kubeconfig secret
 Notice:
   Cross-network, need to change the config server address.
(In member kubernetes)~#  kubectl create ns karmada-system
(In member kubernetes)~#  kubectl create secret generic karmada-kubeconfig --from-file=karmada-kubeconfig=/root/karmada-apiserver.config  -n karmada-system                  

Step 3: Create karmada agent
(In member kubernetes)~#  MEMBER_CLUSTER_NAME="demo"
(In member kubernetes)~#  sed -i "s/{member_cluster_name}/${MEMBER_CLUSTER_NAME}/g" karmada-agent.yaml
(In member kubernetes)~#  kubectl apply -f karmada-agent.yaml
                                                                                                                                                                             
Step 4: Show members of karmada                                                                                                                                              
(In karmada)~# kubectl  --kubeconfig %s/karmada-apiserver.config get clusters

`, "`", "`", path, path, path, path, path)
}