Adoptable Cookbooks List

Looking for a cookbook to adopt? You can now see a list of cookbooks available for adoption!
List of Adoptable Cookbooks

Supermarket Belongs to the Community

Supermarket belongs to the community. While Chef has the responsibility to keep it running and be stewards of its functionality, what it does and how it works is driven by the community. The chef/supermarket repository will continue to be where development of the Supermarket application takes place. Come be part of shaping the direction of Supermarket by opening issues and pull requests or by joining us on the Chef Mailing List.

Select Badges

Select Supported Platforms

Select Status

RSS

choregraphie (33) Versions 0.5.1

Coordinates the application of changes induced by chef

Policyfile
Berkshelf
Knife
cookbook 'choregraphie', '= 0.5.1', :supermarket
cookbook 'choregraphie', '= 0.5.1'
knife supermarket install choregraphie
knife supermarket download choregraphie
README
Dependencies
Quality 50%

choregraphie

choregraphie is French for choreography.

Build Status

Concepts

A protected resource is a resource whose convergence can induce downtime on the service. For instance, service[mydatabase] is usually a resource to protect.

A choregraphie describes actions which operate on some chef events. It allows, for instance, to run an action before and after the convergence of a resource (currently: after means at the end of a sucessful run).

A primitive is a helper for common idioms in choregraphies. Examples: grabbing a lock, silencing the monitoring, executing a shell command.

Example

choregraphie 'my elasticsearch' do
  # protect against service and network restart
  on 'service[mydatase]'
  on 'service[network]'

  # protect against all reboot resources
  on /^reboot\[/

  # built-in primitive
  consul_lock(path: 'choregraphie/locks/myes', concurrency: 2)

  before do
    # roll your own code
    downtime_in_monitoring
  end
end

Support

Only chef >= 12.6 is supported (due to a dependency on :before notifications).

Usage of compat_resource cookbook is highly discouraged as it modifies chef behavior and has silently broken :before notification in the past which are the foundation of choregraphie. Branch 'criteo' in criteo-forks organization is a safely patched version of this cookbook to avoid any chef monkeypatching.

Choregraphies can be applied only on resources that support whyrun (currently chef default resources and resource/provider style).
Custom resources (the whole resource defined in the resources/ directory) are not supported at the moment (see https://github.com/chef/chef/issues/4537 for a discussion).

Available Primitives

See the code for up-to-date information.

  • CheckFile: check_file '/tmp/do_it' will wait until the given file exists on the filesystem. This file is cleaned after.
  • WaitUntil: wait_until "ping -c 1 google.com" will wait until the command exit with a 0 status. This primitives supports string, mixlib/shellout instance and blocks.
  • ConsulLock: consul_lock {path: '/lock/my_app', id: 'my_node', concurrency: 5} will grab a lock from consul and release it afterwards. This primitive is based on optimistic concurrency rather than consul sessions.
  • ConsulMaintenance: consul_maintenance reason: 'My reason' will enable maintenance mode on the consul agent before the choregraphie starts.

Missing Primitives

Write your own, it is easy.

How to write a primitive

You should have a look at the example primitives such as check_file.

Primitives can implement two callbacks:
- before is the callback called before the start of choregraphie (usually before the convergence of a resource)
- cleanup is the callback called at the end of successful chef-client run. Cleanup is always called so primitives must be efficient and safe to run at the end of all chef-client runs (for instance cleaning a file only if exists).

Collaborator Number Metric
            

0.5.1 failed this metric

Failure: Cookbook has 1 collaborators. A cookbook must have at least 2 collaborators to pass this metric.

Foodcritic Metric
            

0.5.1 passed this metric