This document discusses Application Automation with Habitat. It provides an overview of Habitat's technology including the plan artifact depot, build service, supervisor, and artifact distribution servers. It then summarizes some new features and updates to Habitat since its initial launch in 2016, including package search from the command line, improved proxy support, faster configuration iteration, better behavior for root/non-root users via sudo, easier upgrading on Mac, and process updates around continuous deployment and a distributed build service. It invites contributors to participate in Hacktoberfest and help shape Habitat's direction.

1. Application Automation with Habitat
Simon Fisher / Fletcher Nichol

4. Errno::EACCES: Permission denied - /home/-----
/#####/-----/vendor/bundle/ruby/1.9.1/cache/bundler
/home/-----/.rvm/rubies/ruby-1.9.3-
p551/lib/ruby/1.9.1/fileutils.rb:247:in `mkdir'
/home/-----/.rvm/rubies/ruby-1.9.3-
p551/lib/ruby/1.9.1/fileutils.rb:247:in `fu_mkdir'
/home/-----/.rvm/rubies/ruby-1.9.3-
p551/lib/ruby/1.9.1/fileutils.rb:221:in `block (2
levels) in mkdir_p'
/home/-----/.rvm/rubies/ruby-1.9.3-
p551/lib/ruby/1.9.1/fileutils.rb:219:in
`reverse_each'
/home/-----/.rvm/rubies/ruby-1.9.3-
p551/lib/ruby/1.9.1/fileutils.rb:219:in `block in
mkdir_p'

7. include_recipe 'nginx::default’
template "#{node['dafne_online']['deploy_base']}/shared/config/nginx.conf" do
source 'nginx_conf.erb’
owner 'rails’
group 'admin’
mode '0644’
notifies :restart, 'service[nginx]’
end

8. deploy node['dafne_online']['deploy_base'] do
repository "https://#{node['dafne_online']['git_user']}:#{git_pw}@dafneonline.git.cloudforge.com/dafneonline.git" rollback_on_error true
environment rails_user_env
restart_command 'sudo -H -u rails bash -c "export PATH=/opt/rubies/2.2.3/bin:$PATH && /etc/init.d/unicorn_dafneonline restart"’
action :deploy symlinks shared_hash
user node['dafne_online']['deploy_user']
group 'admin’
before_symlink do
execute 'bundle install' do
command "bundle install --path #{node['dafne_online']['deploy_base']}/shared/bundle --without development test --deployment --quiet”
user node['dafne_online']['deploy_user']
environment rails_user_env
cwd release_path
action :run
end
end
before_restart do
link '/etc/init.d/unicorn_dafneonline' do
to '/home/rails/apps/dafneonline/current/config/unicorn_init.sh’
end
template "#{node['dafne_online']['deploy_base']}/current/config/unicorn.rb" do
source 'unicorn.rb.erb' owner node['dafne_online']['deploy_user']
group 'admin’
mode 00744
end
execute 'compile assets' do
command "RAILS_ENV=#{node['dafne_online']['rails_env']} bundle exec rake assets:precompile”
user node['dafne_online']['deploy_user']
environment rails_user_env
cwd release_path
action :run
end
end
after_restart do
execute 'notify Airbrake of deployment' do
command "RAILS_ENV=#{node['dafne_online']['rails_env']} bundle exec rake airbrake:deploy TO=#{node['dafne_online']['rails_env']} REVISION=
REPO=https://dafneonline.git.cloudforge.com/dafneonline.git USER=#{node['dafne_online']['deploy_user']}”
environment rails_user_env
user node['dafne_online']['deploy_user']
cwd release_path
action :run
end
end
end

9. 9

10. Habitat Technology
Plan Artifact Depot
Build
Service
Supervis
or
Supervis
or
Supervis
or
Supervis
or
Ring
Bare Metal
Containers
AMI
VM
Depot
Build Service &
Workflow
Package Format Artifact Distribution
Server
Artifact Distribution
Server
Intelligent Run-Time Supervisor w/REST
API
Source
Code
Repo
Supervisor Supervisor

11. Stop!
Demo Time

12. What’s New?
Habitat features and updates post-launch 2016

13. Package Search from Command Line
$ hab pkg search hab-studio
core/hab-studio/0.10.0/20160929200453
core/hab-studio/0.10.0/20160929200924
core/hab-studio/0.10.1/20160929223112
core/hab-studio/0.10.2/20160930230930
core/hab-studio/0.6.0/20160612082608
core/hab-studio/0.6.0/20160613075329
core/hab-studio/0.7.0/20160614232531
core/hab-studio/0.8.0/20160708162421
core/hab-studio/0.8.0/20160729121901
core/hab-studio/0.8.0/20160729180228
core/hab-studio/0.8.0/20160729195909
core/hab-studio/0.9.0/20160815225526
core/hab-studio/0.9.1/20160901205418
core/hab-studio/0.9.3/20160916192516
core/hab-studio/0.9.3/20160922234920
core/hab-studio/0.9.3/20160926154214

14. Improved Proxy Support
• Supports $http_proxy, $https_proxy, $no_proxy environment
variables
• Basic authentication
• Propagate into Studios

15. Iterate Service Configurations Quicker
using
–config-from
• Faster iteration of configuration templates during plan
development
• $ hab start yourorigin/yourpackage --config-from /path/to/config
• Intended only for development

16. Improved Root/Non-Root Behavior via
sudo
• Drop the need to prefix most hab commands with sudo
• Entering a Studio with sudo detects user’s key cache (not
root’s)
• $ hab setup; sudo hab studio enter
• Future release will “auto-sudo” when using Studio
subcommands

17. Better Mac Docker/Studio Upgrading
• Mac uses a Docker image for Linux Studio
• Runs Docker image with same version as hab CLI
• On upgrading hab CLI, new Docker image automatically pulled

18. Process: Release Train Model
• Userland tooling: hab CLI, Supervisor, Director
• Every second Thursday, cut from master
• Typically a minor version revision
• Features ship when ready and early features will hide behind
feature flags

19. Process: (Upcoming) Continuous
Deployment
• Platform infrastructure: web site, Depot, Builder
• Packages built off master and published to Depot
• Platform upgrades when new packages publish
• Decoupled release from userland tooling

20. Builder: A Distributed Build Service
• Micro service architecture, built with Habitat in mind
• Habitat runs on Habitat
• Upcoming: early access to build a package on the platform via
feature flag/invite
• Upcoming: building packages on pushes to GitHub
• Upcoming: dependent package rebuilding
• More details: “Habitat 301: Building Habitats” ChefConf 2016
Talk by Jamie Winsor

21. Expanding Horizons: Windows
• Bring Mac Habitat experience to Windows
• Building hab CLI
• Upcoming: ship first hab packages for Windows
• Upcoming: native Windows Habitat packages
• Upcoming: Supervisor running on Windows

22. Contribute to “Habtoberfest”!
• Habitat participating in Digital Ocean’s Hacktoberfest event
• Runs October 1st through 31st
• Make 4 pull requests (on any FOSS project), earn a limited
edition Hacktoberfest T-shirt
• Habitat repo has “Hacktoberfest” tagged issues
• http://hacktoberfest.digitalocean.com

23. Help Shape the Direction of Habitat
• Try out Habitat https://www.habitat.sh/try/
• Build a package
• Try out use cases, contact us when: you win, you come up
short, (i.e. anytime)
• Join us in HabiChat http://slack.habitat.sh/
• We’re at a Community Summit—let’s talk!