[Addon] Add Let's Encrypt ACME Configuration in traefik Addon

[charlie0129]

The traefik helm chart has included support for ACME certificate resolver configuration through helm Values: traefik/traefik-helm-chart#419

Currently, we need to manually input cert and key with traefik addon.

It is better if Let's Encrypt ACME is supported.

• Support multiple domains in cert-manager.
• Tutorial on how to use cert-manager and traefik together

[barnettZQG]

@charlie0129 Good proposal, do you contribute?

[charlie0129]

Sure, then I will work on this later.

[wonderflow]

why don't add let's encriypt as an addon, so other addon can dependsOn it if they need mTLS.

[charlie0129]

IMO, it is just used for one-way TLS on the public Internet (or k8s Ingress)? Not so sure if it is widely used for mTLS.

[wonderflow]

Yes, it's popular, you can check: https://cloud.redhat.com/blog/using-kubernetes-operators-to-manage-lets-encrypt-ssl-tls-certificates-for-red-hat-openshift-dedicated

I'm not sure if there's any better alternatives.

[charlie0129]

Very informative. I will check how it is achievable using addons.