Kubernetes Minikube Docker trying and failing to pull image

9
votes

I have a docker image called docker-hello-world - all it does is print Hello World to the log using the JRE. When tested it works fine.

Then, I import an image into Kubernetes Docker and run – still no issues.

docker images -a
REPOSITORY                                             TAG                 IMAGE ID            CREATED             SIZE
docker-hello-world                                     latest              9a161d166742        20 hours ago        83.17 MB
  1. When I try and deploy into Kubernetes with kubectl run docker-hello-world --image=docker-hello-world:latest something goes wrong here – I tried the image id as well but I can’t understand why it can’t find the image.

It says deployment created.

kubectl get deployments
NAME                 DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
docker-hello-world   1         1                1                   0           24s

kubectl get pods
NAME                                                READY     STATUS         RESTARTS   AGE
docker-hello-world-67c745cff4-sv77d   0/1       ErrImagePull   0          43s

Logs:

kubectl logs docker-hello-world-67c745cff4-sv77d
Error from server (BadRequest): container "docker-hello-world" in pod "docker-hello-world-67c745cff4-sv77d" is waiting to start: trying and failing to pull image

Im not sure why it can’t find the image.

But if I do from within Minikube:

docker build -t dummy:v1 ~/eclipse-workspace/HelloWorld/bin/

(I don’t really want do generate the image again)

docker images
REPOSITORY                                             TAG                 IMAGE ID            CREATED             SIZE
dummy                                                  v1                  beae3bfd2327        32 seconds ago      83.17 MB

kubectl run --image=dummy:v1 dummy
deployment "dummy” created

kubectl get deployments
NAME           DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
dummy          1                1           1                   0           11s

kubectl get pods
NAME                            READY     STATUS      RESTARTS   AGE
dummy-8496dd7d84-t4h66          0/1       Completed   4          1m

kubectl logs dummy-8496dd7d84-t4h66
Hello, World

It seems to work ok

1
imagedockerkubernetesminikube
Did the IP address of the machine change after you have installed minibuke? Was it working first time and started failing after IP change? – mon
Possible duplicate of How to use local docker images in Kubernetes? – Shahriar

1 Answers

7
votes

The version tag of the image docker-hello-world:latest is latest, which indicates the default ImagePullPolicy is Always (see pkg/apis/core/v1/defaults.go for v1.9.x and after). It will try to pull image from the hub and not use the image already present.

One option is set a specific tag rather than latest.