Deployment is often omitted from configuration management and orchestration, which typically focuses on the infrastructure and not the core application that the infrastructure supports. This presentation will give an overview of a deployment system I wrote using SaltStack to provide immediately consistent deployment for software. The deployment system has the ability for manual deploys or for continuous deployments using a Heroku-like workflow. It has support for multiple deployment schemes, with a default of Git deployment. The deployment system uses a combination of Salt peer runner calls, runners, modules, returners, pillars and grains as well as a deployment host running Apache, Sartoris (a git-deploy frontend), and Redis (for reporting).

1. Immediate Consistency
With Trebuchet Deploy

2. Deployment is an
ignored problem

4. Sync
Common
All
Php

5. - Poor immediate
consistency

6. - Poor reporting
during deployment

7. - No reporting after
deployment

8. - Difficult to modify
and maintain

9. - Non-extensible

10. - No service
orchestration

11. - Difficult to use

12. sync-common
sync-common-all
sync-common-file
sync-dblist
sync-docroot
sync-dir
sync-file
sync-wikiversions
scap
apache-graceful
apache-graceful-all
sync-apache

13. + Has eventual
consistency

14. + Has fast transmission
mechanism
via tiered rsync

15. Trebuchet
Deployment
System

17. + Immediate
consistency via
deployment module

18. + Eventual consistency
via states

19. + Reporting via
returners

20. + Easy modification and
extension via modules
and runners

21. + Service orchestration
via reactors, runners
and modules

22. + Targeting via grains
or pillars

23. + Configuration
via pillars

24. deployment_config:
parent_dir: /srv/deployment
redis:
db: 0
host: reporting.example.org
port: 6379
repo_config:
test/testrepo:
grain: testrepo
upstream: https://gerrit.wikimedia.org/r/p/test
fetch_module_calls:
saltutil.refresh_pillars
checkout_module_calls:
testrepo.gen_css
service_name: test-service

25. - Git is slow
for large binaries

26. - No canary
support yet

27. git deploy start
git deploy sync
git deploy abort
git deploy revert
git deploy service <action>
git deploy report
git deploy <extension>
Trebuchet
Trigger

31. Mission
Enable the world to treat
Wikimedia's infrastructure like any of
its projects: anyone can edit.

33. Trebuchet
PaaS

34. Join us!
Ryan Lane
Lyft
rlane@lyft.com
trebuchet-deploy on GitHub
IRC (Freenode):
#trebuchet-deploy
Come to the puppet + salt
integration talk later today!