CliApp

cliapp is a framework which provides a capability of executing a CLI program in a k8s cluster via a local shortcut, especially for minikube clusters running on hypervisor.

That is, considering a single node minikube cluster, by installing a cliapp named ctr, we can run command ctr on the Host to check status of containerd on the single cluster node.

We can also export the cliapp list and import them to another cluster w/ CliApp installed.

Currently, cliapp only supports containerd as the container runtime.

Install

We also build a kubectl plugin kubectl-dev to support cliapp management.

CliApp Object

A cliapp object looks like below. Execute kubectl get cliapp --all-namespaces could retrieve all installed cliapps.

apiVersion: core.cliapp.warm-metal.tech/v1
kind: CliApp
metadata:
  creationTimestamp: "2021-03-14T14:23:32Z"
  generation: 2
  managedFields:
  - apiVersion: core.cliapp.warm-metal.tech/v1
    fieldsType: FieldsV1
    fieldsV1:
      f:spec:
        .: {}
        f:command: {}
        f:env: {}
        f:hostpath: {}
        f:image: {}
    manager: kubectl-dev
    operation: Update
    time: "2021-03-14T14:23:32Z"
  - apiVersion: core.cliapp.warm-metal.tech/v1
    fieldsType: FieldsV1
    fieldsV1:
      f:status:
        .: {}
        f:lastPhaseTransition: {}
        f:phase: {}
        f:podName: {}
    manager: manager
    operation: Update
    time: "2021-03-14T14:23:32Z"
  - apiVersion: core.cliapp.warm-metal.tech/v1
    fieldsType: FieldsV1
    fieldsV1:
      f:spec:
        f:targetPhase: {}
    manager: session-gate
    operation: Update
    time: "2021-03-14T14:23:35Z"
  name: crictl
  namespace: default
  resourceVersion: "404083"
  uid: 5fb3d41b-59ad-44a8-bceb-c76638e7ff5d
spec:
  command:
  - crictl
  env:
  - CONTAINER_RUNTIME_ENDPOINT=unix:///var/run/containerd/containerd.sock
  - http_proxy=http://192.168.64.1:1087
  - HTTP_PROXY=http://192.168.64.1:1087
  - https_proxy=http://192.168.64.1:1087
  - HTTPS_PROXY=http://192.168.64.1:1087
  - no_proxy=localhost,127.0.0.1,10.0.0.0/8,192.168.0.0/16,172.16.0.0/12
  - NO_PROXY=localhost,127.0.0.1,10.0.0.0/8,192.168.0.0/16,172.16.0.0/12
  hostpath:
  - /var/run/containerd/containerd.sock
  image: docker.io/warmmetal/app-crictl:v0.1.0
  targetPhase: Rest
status:
  lastPhaseTransition: "2021-03-14T14:33:35Z"
  phase: ShuttingDown
  podName: crictl-88hgl