Can we upgrade Traefik to version 3. x？

[mypublicuse]

Can we upgrade Traefik to version 3. x？
https://doc.traefik.io/traefik/getting-started/quick-start-with-kubernetes/

[shakibamoshiri]

First
disable traefik (--disable=traefik) when you setup the cluster
Second
Install latest version via helm

Of course it is better the k3s package be upgraded, and I do not know why they are suing using v2.6

[brandond]

You can follow #10526

[shakibamoshiri]

I upgrade traefik to v3 and IPV6 was removed from traefik service !
#10683

[shakibamoshiri]

found a way of updating (or modifying) traefik configuration using helm

[shakibamoshiri]

Finally

remove old

We can uninstall traefik using helm

helm uninstall traefik -n kube-system

add new

then install the latest version

helm repo add traefik https://traefik.github.io/charts

helm repo update

helm install traefik traefik/traefik -n kube-system

If updating needed, we can do it with helm values

### save the values
helm show values traefik/traefik > value.yaml

### update and save
vim value.yaml

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

check

helm list -n kube-system
NAME       	NAMESPACE  	REVISION	UPDATED                                  	STATUS  	CHART                      	APP VERSION
traefik    	kube-system	3       	2024-08-08 09:17:45.673772087 +0330 +0330	deployed	traefik-30.0.2             	v3.1.0     
traefik-crd	kube-system	1       	2024-08-07 16:32:37.804433746 +0000 UTC  	deployed	traefik-crd-25.0.3+up25.0.0	v2.10.5 

and

helm history  traefik -n kube-system 
REVISION	UPDATED                 	STATUS    	CHART         	APP VERSION	DESCRIPTION     
1       	Wed Aug  7 23:04:25 2024	superseded	traefik-30.0.2	v3.1.0     	Install complete
2       	Thu Aug  8 09:15:08 2024	superseded	traefik-30.0.2	v3.1.0     	Upgrade complete
3       	Thu Aug  8 09:17:45 2024	deployed  	traefik-30.0.2	v3.1.0     	Upgrade complete

an issue you man face helm upgrade traefik dual-stack ipv6 is removed for traefik service #10683

[dossjjx]

Thanks for this. Did you also have to upgrade traefik-crd?

[shakibamoshiri]

As long as I can remember , in new version, crd is done at the same time of upgrading to traefik v3

[shakibamoshiri]

yes , I tested udp load balancer using v3 CRD and worked fine