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Job server deployment instructions

Create app

dokku$ dokku apps:create job-server
dokku$ dokku domains:add job-server jobs.opensafely.org
dokku$ dokku git:set job-server deploy-branch main

Configure app

dokku config:set job-server BASE_URL='https://jobs.opensafely.org'
dokku config:set job-server CSP_REPORT_URI='xxx'
dokku config:set job-server DATABASE_URL='postgres://localhost/jobserver'
dokku config:set job-server EMAIL_BACKEND='anymail.backends.mailgun.EmailBackend'
dokku config:set job-server JOBSERVER_GITHUB_TOKEN='xxx'
dokku config:set job-server MAILGUN_API_KEY='xxx'
dokku config:set job-server OTEL_EXPORTER_OTLP_ENDPOINT='https://api.honeycomb.io'
dokku config:set job-server OTEL_EXPORTER_OTLP_HEADERS='x-honeycomb-team=xxx,x-honeycomb-dataset=job-server'
# disabling some instrumentations may be necessary depending on honeycomb quota
dokku config:set job-server OTEL_PYTHON_DISABLED_INSTRUMENTATIONS='psycopg2'
dokku config:set job-server OTEL_SERVICE_NAME='job-server'
dokku config:set job-server SECRET_KEY='xxx'
dokku config:set job-server SENTRY_DSN='https://xxx@xxx.ingest.sentry.io/xxx'
dokku config:set job-server SENTRY_ENVIRONMENT='production'
dokku config:set job-server SOCIAL_AUTH_GITHUB_KEY='xxx'
dokku config:set job-server SOCIAL_AUTH_GITHUB_SECRET='xxx'

Manually pushing

local$ git clone git@github.com:opensafely-core/job-server.git
local$ cd job-server
local$ git remote add dokku dokku@MYSERVER:job-server
local$ git push dokku main

extras

dokku letsencrypt job-server
dokku plugin:install sentry-webhook

Ensure persistent logs

dokku$ sudo mkdir -p /var/log/journal

Test Mailgun

dokku$ dokku enter job-server
container$ python manage.py sendtestemail me@myemail.org

Rotating the Django secret key

If this is a routine rotation of the secret key — and not a compromised secret key — you can temporarily leave the secret key to be rotated alongside the new secret key.

This allows for changing the secret key without logging out all users at once.

There are three steps to this process.

1. Duplicate the existing secret key

dokku config:set job-server OLD_SECRET_KEY="$(dokku config:get job-server SECRET_KEY)"

2. Replace the existing secret key

# Prefix the command with a space to avoid saving the input to shell history:
 dokku config:set job-server SECRET_KEY='xxx'

You can generate a new secret key as follows:

from django.core.management.utils import get_random_secret_key

get_random_secret_key()

3. Remove the previous secret key

A suitable expiry time is given by adding the SESSION_COOKIE_AGE duration to the time at which the secret key was replaced. Once that expiry time is reached, any sessions created before the secret key was replaced will have then expired anyway.

If this is not set in the code, Django's default SESSION_COOKIE_AGE is two weeks.

Set a Slack reminder for this time, and then remove OLD_SECRET_KEY as soon as possible when reminded:

dokku config:unset job-server OLD_SECRET_KEY