helm upgrade traefik dual-stack ipv6 is removed for traefik service

[shakibamoshiri]

Installed k3s with traefik enabled in dual stack , no issue
installing traefik helm package
helm uninstall traefik -n kube-system
and
helm install traefik -n kube-system
the version has been upgraded to v3.1 but no longer the service is listing on ipv6

 k3s --version 
k3s version v1.30.3+k3s1 (f6466040)
go version go1.22.5

What has gone wrong ?
Regards

[shakibamoshiri]

The new traefik service is not configured for dual-stack

spec:
  ipFamilyPolicy: PreferDualStack
  ipFamilies:
  - IPv6
  - IPv4

Testing the service with kubectl edit svc trafic enabled IPv6 , better to update help chart or find a helm chart configured for dual-stack

[shakibamoshiri]

we can use helm upgrade, modifying the key we need,
in this case we need to update ipFamilyPolicy which by default has been set to SingleStack

1. install and deploy traefik using helm

2. get the heml's values helm show values traefik/traefik > value.yaml

3. update the key vim value.yaml and

  ## One of SingleStack, PreferDualStack, or RequireDualStack.
  ipFamilyPolicy: RequireDualStack

4. apply changes helm upgrade traefik traefik/traefik -f value.yaml -n kube-system

5. check the changes k get svc traefik -n kube-system -o yaml and we should see

  ipFamilies:
  - IPv4
  - IPv6
  ipFamilyPolicy: RequireDualStack

NOTE
you should know the namespace of traefik , otherwise you will get errors like this (mine was in -n kube-system)

helm upgrade traefik  traefik/traefik -f value.yaml
Error: UPGRADE FAILED: "traefik" has no deployed releases

the error is not describe enough , it should like

Error: UPGRADE FAILED: "traefik" has no deployed releases in "default" namespace

k8s doc

[brandond]

Don't do that. Customize the chart values as described in the documentation.

https://docs.k3s.io/helm#customizing-packaged-components-with-helmchartconfig

[AndrewSav]

@brandond this does not seem to work.

With

apiVersion: helm.cattle.io/v1
kind: HelmChartConfig
metadata:
  name: traefik
  namespace: kube-system
spec:
  valuesContent: |-
    image:
      name: traefik
      tag: 3.2.0

Result:

Failed to pull image "rancher/mirrored-library-traefik:3.2.0": rpc error: code = NotFound desc = failed to pull and unpack image "docker.io/rancher/mirrored-library-traefik:3.2.0": failed to resolve reference "docker.io/rancher/mirrored-library-traefik:3.2.0": docker.io/rancher/mirrored-library-traefik:3.2.0: not found

It looks like it is trying to pull "rancher/mirrored-library-traefik:3.2.0" from docker hub, which does not exist. How do we fix that?

[brandond]

There is no "image.name" value any longer, the chart has changed upstream and the docs are now out of date.
https://github.com/k3s-io/k3s-charts/blob/main/charts/traefik/27.0.201%2Bup27.0.2/values.yaml#L4

[AndrewSav]

Thanks