kwokctl scale command and Resource API

[wzshiming]

What would you like to be added?

# Create a Node with generate name "kwok-node"
kwokctl scale node kwok-node --replicas 1
#              |
#         resource name

# Create a Node with generate name "kwok-node-arm64"
kwokctl scale node kwok-node-arm64 --replicas 1 --param '.nodeInfo.architecture="arm64"'
#                                                                               |
#                                                                        Modify the arch

# Create 10 Pods with generate name "fake-pod"
kwokctl scale pod fake-pod --replicas 10 --param '.containers[0].image="nginx"' --param '.containers+=[{name:"name",image:"image"}]'
#                                      |                               |                              |
#                               Scale up to 10 from 0           Modify the image       Inject a new container

# Scale down to 5 Pods
kwokctl scale pod fake-pod --replicas 5

The expression of --param content is JQ

apiVersion: config.kwok.x-k8s.io/v1alpha1
kind: KwokctlResource
metadata:
  name: node
parameters:
  podCIDR: "10.0.0.1/24"
  allocatable:
    cpu: 32
    memory: 256Gi
    pods: 110
  capacity: {}
  nodeInfo:
    architecture: amd64
    operatingSystem: linux
template: |-
  kind: Node
  apiVersion: v1
  metadata:
    name: {{ Name }}
    annotations:
      kwok.x-k8s.io/node: fake
      node.alpha.kubernetes.io/ttl: "0"
    labels:
      beta.kubernetes.io/arch: {{ .nodeInfo.architecture }}
      beta.kubernetes.io/os: {{ .nodeInfo.operatingSystem }}
      kubernetes.io/arch: {{ .nodeInfo.architecture }}
      kubernetes.io/hostname: {{ Name }}
      kubernetes.io/os: {{ .nodeInfo.operatingSystem }}
      kubernetes.io/role: agent
      node-role.kubernetes.io/agent: ""
      type: kwok
  spec:
    podCIDR: {{ AddCIDR .podCIDR Index }}
  status:
    allocatable:
    {{ range $key, $value := .allocatable }}
      {{ $key }}: {{ $value }}
    {{ end }}
    {{ $capacity := .capacity }}
    capacity:
    {{ range $key, $value := .allocatable }}
      {{ $key }}: {{ or ( index $capacity $key ) $value }}
    {{ end }}
    nodeInfo:
    {{ range $key, $value := .nodeInfo }}
      {{ $key }}: {{ $value }}
    {{ end }}

---
apiVersion: config.kwok.x-k8s.io/v1alpha1
kind: KwokctlResource
metadata:
  name: pod
parameters:
  initContainers: []
  containers:
  - name: container-0
    image: busybox
  hostNetwork: false
  nodeName: ""
template: |-
  kind: Pod
  apiVersion: v1
  metadata:
    name: {{ Name }}
    namespace: {{ or Namespace "default" }}
  spec:
    containers:
    {{ range $index, $container := .containers }}
    - name: {{ $container.name }}
      image: {{ $container.image }}
    {{ end }}
    initContainers:
    {{ range $index, $container := .initContainers }}
    - name: {{ $container.name }}
      image: {{ $container.image }}
    {{ end }}
    hostNetwork: {{ .hostNetwork }}
    nodeName: {{ .nodeName }}

Why is this needed?

Easy to mock data