Using a local image to create a pod in K8s

Question

I created this image using a dockerfile of my own:

REPOSITORY   TAG     IMAGE ID       CREATED      SIZE

ruby/lab     latest  f1903b1508cb   2 hours ago  729.6 MB

And the kubernetes deployment file:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: ruby-deployment
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: ruby
    spec:
      containers:
      - name: ruby-app
        image: ruby/lab
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 4567

But If I try and create the deployment the pods are unable to get the image:

ruby-deployment-3830038651-sa4ii   0/1       ImagePullBackOff   0          7m
ruby-deployment-3830038651-u1tvc   0/1       ImagePullBackOff   0          7m

And:

 8m            2m              6       {kubelet minikube}      spec.containers{ruby}   Normal          Pulling         pulling image "ruby/lab:latest"
  8m            2m              6       {kubelet minikube}      spec.containers{ruby}   Warning         Failed          Failed to pull image "ruby/lab:latest": Error: image ruby/lab not found
  8m            2m              6       {kubelet minikube}                              Warning         FailedSync      Error syncing pod, skipping: failed to "StartContainer" for "ruby" with ErrImagePull: "Error: image ruby/lab not found"

Do I have to upload the image to docker to get this done? I just want to test this locally.

Answer 1

point your docker client to your machine's docker daemon:

eval $(minikube docker-env)

Now, build your image and then create the kubernetes resources using kubectl command but use the following in your YAML file:

imagePullPolicy: IfNotPresent

If you're using minkube you can pass a flag the first time you're creating the minikube machine.

minikube start --insecure-registry

You may also want to read this when using a private registry http://kubernetes.io/docs/user-guide/images/

Answer 2

I'm not sure but you can try this. Tag the docker image and push it in a repository on Github and then try to use that tagged image in your deployment.