Installing on Kubernetes

Product Support Self-hosting
11

I bootstrap with the following in containers/app.yml:

templates:
  - "templates/web.template.yml"
  - "templates/redis.template.yml"

env:
  LANG: en_US.UTF-8
  DISCOURSE_HOSTNAME: 'discourse.mysite.org'
  DISCOURSE_DB_USERNAME: discourseuser
  DISCOURSE_DB_NAME: discourse
  DISCOURSE_DEVELOPER_EMAILS: 'jasmin.hassan@mysite.org'
  DISCOURSE_DB_SOCKET: ''
  DISCOURSE_DB_HOST: 'x.x.x.rds.amazonaws.com'
  DISCOURSE_SMTP_ADDRESS: 'email-smtp.x.amazonaws.com'
  DISCOURSE_SMTP_PORT: 587
  DISCOURSE_SMTP_USER_NAME: randomuser
  DISCOURSE_SMTP_PASSWORD: randompassword
  DISCOURSE_DB_PASSWORD: securepassword

Then I push to private docker hub repo, and write a yaml file for kubernetes to pull my newly pushed private image, and apply it. However, without a “command” and/or “args” set in the kubernetes yaml file for the deployment, the container/pod starts up but immediately errors with:

I, [2017-07-15T12:52:21.697829 #13] INFO – : Loading --stdin
/pups/lib/pups/config.rb:23:in initialize': undefined method ’ for nil:NilClass (NoMethodError)
from /pups/lib/pups/cli.rb:27:in new' from /pups/lib/pups/cli.rb:27:in run’
from /pups/bin/pups:8:in `’

After some research and digging in, I realize I have to set a custom command in kubernetes yaml file, so a part of it might look like:

- image: myorg/discourse:latest
  name: discourse
  command: ["/bin/bash"]
  args: ["-c", "cd /var/www/discourse && bin/bundle exec rails server && bin/bundle exec sidekiq -q critical,low,default -d -l log/sidekiq.log && nginx"]
  imagePullPolicy: Always
  ports:
  - containerPort: 80
  resources:
    requests:
      memory: "2Gi"

Then the ENV vars (postgres, redis, smtp, etc.) and volume mounts.

However, puma server (tcp/3000) dies silently after daemonizing according to the logs.
Fix (from containers/app.yml):
sed -i 's#/home/discourse/discourse#/var/www/discourse#' config/puma.rb

Site then loads, but all assets are not loaded (css, js, etc).
Fix:
sed -i 's/GlobalSetting.serve_static_assets/true/' config/environments/production.rb

so basically I ended up with the additional section in containers/app.yml:

run:
  - exec:
      cd: /var/www/discourse
      cmd:
        - sed -i 's#/home/discourse/discourse#/var/www/discourse#' config/puma.rb
        - sed -i 's/GlobalSetting.serve_static_assets/true/' config/environments/production.rb
        - bash -c "touch -a /shared/log/rails/{sidekiq,puma.err,puma}.log"
        - bash -c "ln -s /shared/log/rails/{sidekiq,puma.err,puma}.log log/"

additionally, because of SSL termination outside, for actions like trigger/delete/retry/etc at https://discourse/sidekiq one gets 403 forbidden errors and in puma.err.log it complains about HttpOrigin.
So I just fix that by adding:

    - sed -i 's/default \$scheme;/default https;/' /etc/nginx/conf.d/discourse.conf

and rebuilding.

latest build as of today
v1.9.0.beta4 +61