Miscweb

This page is about the new service miscweb on kubernetes.

It was requested in task T281538 to replace the legacy service miscweb running on Ganeti VMs in production.

Since 2022-01-20 it serves production traffic for static-bugzilla.

Also see: miscweb1002, miscweb2002 for the legacy machines still serving other microsites.

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Sites running on miscweb k8s

The first of the sites hosted on miscweb-k8s is static-bugzilla.

Since 2022-01-20 static-bugzilla.wikimedia.org is served from k8s.

The actual switch to the new backend was made here.

Other micro-sites are going to follow this quarter.

Where does the code live?

The docker image is is built by the Deployment Pipeline/CI from the repo operations/container/miscweb. This is also where the actual content and webserver config can be found.

The helm charts for kubernetes are together with the other services in operations/deployment-charts.

Note that all the HTML content files are gzipped to reduce image size. If you want to edit HTML inside it you need to gunzip, edit and gzip, then upload to Gerrit.

How to deploy changes

Staging

• ssh deploy1002.eqiad.wmnet
• [deploy1002:~] $ kube_env miscweb staging
• [deploy1002:~] $ helmfile -e staging diff
• [deploy1002:~] $ helmfile -e staging -i apply

And wait.. either it works after a little while or it will automatically revert after 5 minutes.

Production

• ssh deploy1002.eqiad.wmnet
• [deploy1002:~] $ kube_env miscweb codfw
• [deploy1002:~] $ helmfile -e codfw diff
• [deploy1002:~] $ helmfile -e codfw -i apply

And wait.. either it works after a little while or it will automatically revert after 5 minutes.

• [deploy1002:~] $ kube_env miscweb eqiad
• [deploy1002:~] $ helmfile -e eqiad diff
• [deploy1002:~] $ helmfile -e eqiad -i apply

And wait.. either it works after a little while or it will automatically revert after 5 minutes.

Service names

miscweb.svc.eqiad.wmnet has address 10.2.2.58  (eqiad)
miscweb.svc.codfw.wmnet has address 10.2.1.58  (codfw)

miscweb.discovery.wmnet has address 10.2.2.58  (DNS/Discovery)

LVS / discovery

https://config-master.wikimedia.org/pybal/eqiad/miscweb

https://config-master.wikimedia.org/pybal/codfw/miscweb

https://config-master.wikimedia.org/discovery/

How this service was made

Here I am trying to compile a table / list of all the changes made to get this service from scratch into WMF production, in chronological order of how they were merged.

steps for miscweb

#	action	link
1	create phabricator request ticket	Example
2	request gerrit repo	Example
3	reserve port	Example