chinwag/chinwagsocial
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Sheogorath cddcafec31
Helm: Major refactoring regarding Deployments, Environment variables and more (#20733) 
* fix(chart): Remove non-functional Horizontal Pod Autoscaler

The Horizontal Pod Autoscaler (HPA) refers to a Deployment that
doesn't exist and therefore can not work. As a result it's
pointless to carry it around in this chart and give the wrong
impression it could work. This patch removes it from the helm
chart and drops all references to it.

* refactor(chart): Refactor sidekiq deployments to scale

This patch reworks how the sidekiq deployment is set up, by
splitting it into many sidekiq deployments, but at least one,
which should allow to scale the number of sidekiq jobs as
expected while being friendly to single user instances as well
as larger ones.

Further it introduces per deployment overwrites for the most
relevant pod fields like resources, affinities and processed
queues, number of jobs and the sidekiq security contexts.

The exact implementation was inspired by an upstream issue:

https://github.com/mastodon/mastodon/issues/20453

* fix(chart): Remove linode default values from values

This patch drops the linode defaults from the values.yaml since
these are not obvious and can cause unexpected connections as
well as leaking secrets to linode, when other s3 storage
backends are used and don't explicitly configure these options
by accident.

Mastodon will then try to authenticate to the linode backends
and therefore disclose the authentication secrets.

* refactor(chart): Rework reduce value reference duplication

Since most of the values are simply setup like this:

```
{{- if .Values.someVariable }}
SOME_VARIABLE: {{ .Values.someVariable }}
{{- end }}
```

There is a lot of duplication in the references in order to
full in the variables. There is an equivalent notation, which
reduces the usage of the variable name to just once:

```
{{- with .Values.someVariable }}
SOME_VARIABLE: {{ . }}
{{- end }}
```

What seems like a pointless replacement, will reduce potential
mistakes down the line by possibly only adjusting one of the
two references.

* fix(chart): Switch to new OMNIAUTH_ONLY variable

This patch adjusts the helm chart to use the new `OMNIAUTH_ONLY`
variable, which replaced the former
`OAUTH_REDIRECT_AT_SIGN_IN` variable in the following commit:

https://github.com/mastodon/mastodon/pull/17288
3c8857917e

* fix(chart): Repair connection test to existing service

Currently the connect test can't work, since it's connecting to
a non-existing service this patch fixes the service name to
make the job connect to the mastodon web service to verify the
connection.

* docs(chart): Adjust values.yaml to support helm-docs

This patch updates most values to prepare an introduction of
helm-docs. This should help to make the chart more user
friendly by explaining the variables and provide a standardised
README file, like many other helm charts do.

References:
https://github.com/norwoodj/helm-docs

* refactor(chart): Allow individual overwrites for streaming and web deployment

This patch works how the streaming and web deployments work by
adding various fields to overwrite values such as affinities,
resources, replica count, and security contexts.

BREAKING CHANGE: This commit removes `.Values.replicaCount` in
favour of `.Values.mastodon.web.replicas` and
`.Values.mastodon.streaming.values`.

* feat(chart): Add option for authorized fetch

Currently the helm chart doesn't support authorized fetch aka.
"Secure Mode" this patch fixes that by adding the needed config
option to the values file and the configmap.

* docs(chart): Improve helm-docs compatiblity

This patch adjust a few more comments in the values.yaml to be
picked up by helm-docs. This way, future adoption is properly
prepared.

* fix(chart): Add automatic detection of scheduler sidekiq queue

This patch adds an automatic switch to the `Recreate` strategy
for the sidekiq Pod in order to prevent accidental concurrency
for the scheduler queue.

* fix(chart): Repair broken DB_POOL variable
2022-11-24 21:30:29 +01:00
..
templates Helm: Major refactoring regarding Deployments, Environment variables and more (#20733) 2022-11-24 21:30:29 +01:00
.helmignore helm: Add helm chart tests (#20394) 2022-11-13 22:22:07 +01:00
Chart.lock Fix broken dependencies in helm chart and allow using existing secrets in the chart (#18941) 2022-08-10 17:12:58 +02:00
Chart.yaml Bump Helm chart version to account for mastodon 4 (#20886) 2022-11-17 10:53:04 +01:00
dev-values.yaml helm: Add helm chart tests (#20394) 2022-11-13 22:22:07 +01:00
README.md helm: Add helm chart tests (#20394) 2022-11-13 22:22:07 +01:00
values.yaml Helm: Major refactoring regarding Deployments, Environment variables and more (#20733) 2022-11-24 21:30:29 +01:00

README.md

Introduction

This is a Helm chart for installing Mastodon into a Kubernetes cluster. The basic usage is:

  1. edit values.yaml or create a separate yaml file for custom values
  2. helm dep update
  3. helm install --namespace mastodon --create-namespace my-mastodon ./ -f path/to/additional/values.yaml

This chart is tested with k8s 1.21+ and helm 3.6.0+.

Configuration

The variables that must be configured are:

  • password and keys in the mastodon.secrets, postgresql, and redis groups; if left blank, some of those values will be autogenerated, but will not persist across upgrades.

  • SMTP settings for your mailer in the mastodon.smtp group.

Administration

You can run admin CLI commands in the web deployment.

kubectl -n mastodon exec -it deployment/mastodon-web -- bash
tootctl accounts modify admin --reset-password

or

kubectl -n mastodon exec -it deployment/mastodon-web -- tootctl accounts modify admin --reset-password

Missing features

Currently this chart does not support:

  • Hidden services
  • Swift

Upgrading

Because database migrations are managed as a Job separate from the Rails and Sidekiq deployments, it’s possible they will occur in the wrong order. After upgrading Mastodon versions, it may sometimes be necessary to manually delete the Rails and Sidekiq pods so that they are recreated against the latest migration.

Upgrades in 2.1.0

ingressClassName and tls-acme changes

The annotations previously defaulting to nginx have been removed and support for ingressClassName has been added.

ingress:
  annotations:
    kubernetes.io/ingress.class: nginx
    kubernetes.io/tls-acme: "true"

To restore the old functionality simply add the above snippet to your values.yaml, but the recommendation is to replace these with ingress.ingressClassName and use cert-manager's issuer/cluster-issuer instead of tls-acme. If you're uncertain about your current setup leave ingressClassName empty and add kubernetes.io/tls-acme to ingress.annotations in your values.yaml.

Upgrades in 2.0.0

Fixed labels

Because of the changes in #19706 the upgrade may fail with the following error: Error: UPGRADE FAILED: cannot patch "mastodon-sidekiq"

If you want an easy upgrade and you're comfortable with some downtime then simply delete the -sidekiq, -web, and -streaming Deployments manually.

If you require a no-downtime upgrade then:

  1. run helm template instead of helm upgrade
  2. Copy the new -web and -streaming services into services.yml
  3. Copy the new -web and -streaming deployments into deployments.yml
  4. Append -temp to the name of each deployment in deployments.yml
  5. kubectl apply -f deployments.yml then wait until all pods are ready
  6. kubectl apply -f services.yml
  7. Delete the old -sidekiq, -web, and -streaming deployments manually
  8. helm upgrade like normal
  9. kubectl delete -f deployments.yml to clear out the temporary deployments

PostgreSQL passwords

If you've previously installed the chart and you're having problems with postgres not accepting your password then make sure to set username to postgres and password and postgresPassword to the same passwords.

postgresql:
  auth:
    username: postgres
    password: <same password>
    postgresPassword: <same password>

And make sure to set password to the same value as postgres-password in your mastodon-postgresql secret: kubectl edit secret mastodon-postgresql