Replace slack.k8s.io with redirect

[jberkus]

Infra,

We need to shut down the app (slackin) currently running at slack.k8s.io, and replace it with a redirect to https://communityinviter.com/apps/kubernetes/community. It's not clear to me how to do this, particularly with TLS.

Alternately, if that's going to be very painful, we can embed an inviter widget into a simple web page, and run that in the place of Slackin as an app.

What's the best course?

@ameukam @mrbobbytables @cblecker @nikhita

[BenTheElder]

we have a redirector service at go.k8s.io (it's an nginx instance + GKE managed TLS certs / loadbalancer, config is in this repo), we could do the same thing here.

[ameukam]

To be more specific to what Ben said:

• Ensure slack.k8s.io go to redirect.k8s.io in the DNS config
• Ensure the nginx instance has the configuration to handle the redirection
• Ensure slack.k8s.io is an entry in the k8s.io wildcard certificate instead of a dedicated TLS certificate

[dims]

@ameukam one thing i was not sure about was - what to do with

k8s.io/apps/slack-infra/resources/certificate.yaml

Lines 7 to 8 in c1f58df

	- slack.k8s.io
	- slack.kubernetes.io

[dims]

Also i am not very sure about the steps for deploying #4105 - does one of you (@ameukam or @cblecker) want to please deploy?

[ameukam]

/milestone v1.26
/priority critical-urgent
/kind feature

[ameukam]

@ameukam one thing i was not sure about was - what to do with

k8s.io/apps/slack-infra/resources/certificate.yaml

Lines 7 to 8 in c1f58df

	- slack.k8s.io
	- slack.kubernetes.io

This is need to be manually deployed after the PR is merged and the DNS entry is distributed

[ameukam]

This is done.

❯ http -h https://slack.k8s.io
HTTP/1.1 301 Moved Permanently
Alt-Svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
Content-Length: 162
Content-Type: text/html
Date: Fri, 19 Aug 2022 13:11:35 GMT
Location: https://communityinviter.com/apps/kubernetes/community
Server: nginx
Via: 1.1 google

@jberkus can we consider this done ?

[dims]

@jberkus here's the set of urls we tested.

http://slack.kubernetes.io/  - WORKS
https://slack.kubernetes.io/ - WORKS
http://slack.k8s.io/         - WORKS
https://slack.k8s.io/        - WORKS

[jberkus]

This looks done. I'll add removing the slackin app as a follow-up for me.

/close

[k8s-ci-robot]

@jberkus: Closing this issue.

In response to this:

This looks done. I'll add removing the slackin app as a follow-up for me.

/close

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[jberkus]

Follow-up: #4112