helm custom chart ErrImagePull - docker

Question

I've been trying to create a custom helm chart however I get ErrImagePull no matter what image I add to my chart, I can re-create this really easily:
helm create my-chart
(using default nginx docker image):
helm install my-chart .
NAME: my-chart
LAST DEPLOYED: Fri Jan 17 12:26:13 2020
NAMESPACE: example
STATUS: deployed
REVISION: 1
NOTES:
Change values.yaml for a different image (nginx -> ubuntu):
7 image:
8 repository: ubuntu
9 pullPolicy: IfNotPresent
update helm deployment:
helm upgrade my-chart .
Release "my-chart" has been upgraded. Happy Helming!
NAME: my-chart
LAST DEPLOYED: Fri Jan 17 12:30:13 2020
NAMESPACE: example
STATUS: deployed
REVISION: 2
NOTES:
Pod status:
kubectl get pods
NAME READY STATUS RESTARTS AGE
my-chart-54fb9969dd-gnpt9 0/1 ImagePullBackOff 0 32s
my-chart-56485d7b7-hc25q 1/1 Running 0 4m32s
Describe pod:
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled <unknown> default-scheduler Successfully assigned example/my-chart-54fb9969dd-gnpt9 to aw
Normal Pulling 15s (x3 over 62s) kubelet, aw Pulling image "ubuntu:1.16.0"
Warning Failed 13s (x3 over 59s) kubelet, aw Failed to pull image "ubuntu:1.16.0": rpc error: code = Unknown desc = failed to resolve image "docker.io/library/ubuntu:1.16.0": no available registry endpoint: docker.io/library/ubuntu:1.16.0 not found
Warning Failed 13s (x3 over 59s) kubelet, aw Error: ErrImagePull
Normal BackOff 1s (x3 over 58s) kubelet, aw Back-off pulling image "ubuntu:1.16.0"
Warning Failed 1s (x3 over 58s) kubelet, aw Error: ImagePullBackOff

Answer 1

The issue is caused by the fact that the helm template defaults with the chart.appversion
image: "{{ .Values.image.repository }}:{{ .Chart.AppVersion }}"
image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
when you helm create my-chart go to the deployments.yaml and change the image: section to either use the tag variable, then from values.yaml add something like this:
8 repository: ubuntu
9 tag: latest
10 pullPolicy: IfNotPresent