CODEWITHSUNDEEP
dockerkubernetesgoogle-kubernetes-engine
fommil
fommil

Reputation: 5875

how do I start a simple container?

I've read the quick start guide and I've got as far as

I want to start a publicly available docker container, which I can start on any docker-enabled machine with this command

docker run -d \
   -e DRONE_SERVER=wss://ci.fommil.com/ws/broker \
   -e DRONE_SECRET=<redacted> \
   -e DOCKER_MAX_PROCS=1 \
   -e DRONE_TIMEOUT=30m \
   -v /var/run/docker.sock:/var/run/docker.sock \
   --restart=always \
   --name=drone-agent \
   drone/drone:0.5 agent

what is the equivalent Google Console / cubectl command? I've got as far as

kubectl run agent \
  --image=drone/drone:0.5 \
  --env="DRONE_SERVER=wss://ci.fommil.com/ws/broker" \
  --env="DRONE_SECRET=<redacted>" \
  --env="DOCKER_MAX_PROCS=1" \
  --env="DRONE_TIMEOUT=30m" \
  -v /var/run/docker.sock:/var/run/docker.sock

but this -v line isn't quite right. I need to make sure that the /var/run/docker.sock is mounted in the container as the sole purpose of it is to launch sub-processes in docker to run CI jobs.

Upvotes: 1

Views: 140

Answers (1)

pagid
pagid

Reputation: 13867

you're right, creating volumes using the imperative commands to create volumes without config files isn't available in Kubernetes.

But it's easy to write some configuration. Based on this blog post and your requirements a "modern" config might look like.

deployment.yml:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: agent
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: agent
    spec:
      containers:
      - env:
        - name: DRONE_SERVER
          value: "wss://ci.fommil.com/ws/broker"
        - name: DRONE_SECRET
          value: <redacted>
        - name: DOCKER_MAX_PROCS
          value: "1"
        - name: DRONE_TIMEOUT
          value: 30m
        image: drone/drone:0.5
        name: agent
        args: ["agent"]
        securityContext:
          privileged: true
        volumeMounts:
          - mountPath: /var/run/docker.sock
            name: docker-sock
          - mountPath: /var/lib/docker
            name: docker-lib
      volumes:
        - name: docker-sock
          hostPath:
            path: /var/run/docker.sock
        - name: docker-lib
          hostPath:
            path: /var/lib/docker

This could now be used with kubectl create -f deployment.yml and stopped with kubectl delete deployments -l app=agent

Upvotes: 1

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