cookbook 'application', '~> 4.1.6'
Deploys and configures a variety of applications
cookbook 'application', '~> 4.1.6'
knife cookbook site install application
knife cookbook site download application
This cookbook is designed to be able to describe and deploy web applications. It provides the basic infrastructure; other cookbooks are required to support specific combinations of frameworks and application servers. The following cookbooks are available at this time:
- application_java (Java and Tomcat)
- application_nginx (nginx reverse proxy)
- application_php (PHP with
- application_python (Django with Gunicorn)
- application_ruby (Rails with Passenger or Unicorn)
- Version 4.0.0 dropped support for Chef 10
- Version 2.0.0 dropped support for the
The previous dependencies have been moved out to the application-stack-specific cookbooks, and this cookbook has no external dependencies.
application LWRP configures the basic properties of most applications, regardless of the framework or application server they use. These include:
- SCM information for the deployment, such as the repository URL and branch name;
- deployment destination, including the filesystem path to deploy to;
- any OS packages to install as dependencies;
- optional callback to control the deployment.
This LWRP uses the
deploy_revision LWRP to perform the bulk of its tasks, and many concepts and parameters map directly to it. Check the documentation for
deploy_revision for more information.
Configuration of framework-specific aspects of the application are performed by invoking a sub-resource; see the appropriate cookbook for more documentation.
:deploy: deploy an application, including any necessary configuration, restarting the associated service if necessary
:force_deploy: same as
:deploy, but it will send a
:force_deployaction to the deploy resource, directing it to deploy the application even if the same revision is already deployed
name: name attribute. The name of the application you are setting up. This will be used to derive the default value for other attribute
packages: an Array or Hash of packages to be installed before starting the deployment
path: target path of the deployment; it will be created if it does not exist
owner: the user that shall own the target path
group: the group that shall own the target path
keep_releases: count of keep releases
strategy: the underlying LWRP that will be used to perform the deployment. The default is
:deploy_revision, and it should never be necessary to change it
scm_provider: the provider class to use for the deployment. It defaults to
Chef::Provider::Git, you can set it to
Chef::Provider::Subversionto deploy from an SVN repository
repository: the URL of the repository the application should be checked out from
revision: an identifier pointing to the revision that should be checked out
deploy_key: the private key to use to access the repository via SSH, or path to a file containing the key
rollback_on_error: if true, exceptions during a deployment will be caught and a clean rollback to the previous version will be attempted; the exception will then be re-raised. Defaults to true; change it only if you know what you are doing
environment: a Hash of environment variables to set while running migrations
purge_before_symlink: an Array of paths (relative to the checkout) to remove before creating symlinks
create_dirs_before_symlink: an Array of paths (relative to the checkout) pointing to directories to create before creating symlinks
symlinks: a Hash of shared/dir/path => release/dir/path. It determines which files and dirs in the shared directory get symlinked to the current release directory
symlink_before_migrate: similar to symlinks, except that they will be linked before any migration is run
truethen migrations will be run; defaults to false
migration_command: a command to run to migrate the application from the previous to the current state
restart_command: a command to run when restarting the application
environment_name: the name of a framework-specific "environment" (for example the Rails environment). By default it is the same as the Chef environment, unless it is
_default, in which case it is set to
enable_submodules: whether to enable git submodules in the deploy, passed into the deploy resource.
You can also set a few attributes on this LWRP that are interpreted as callback to be called at specific points during a deployment. If you pass a block, it will be evaluated within a new context. If you pass a string, it will be interpreted as a path (relative to the release directory) to a file; if it exists, it will be loaded and evaluated as though it were a Chef recipe.
The following callback attributes are available:
before_deploy: invoked immediately after initial setup and before the deployment proper is started. This callback will be invoked on every Chef run
Anything that is not a known attribute will be interpreted as the name of a sub-resource; the resource will be looked up, and any nested attribute will be passed to it. More than one sub-resource can be added to an application; the order is significant, with the latter sub-resources overriding any sub-resource that comes before.
Sub-resources can set their own values for some attributes; if they do, they will be merged together with the attribute set on the main resource. The attributes that support this behavior are the following:
environment: environment variables from the application and from sub-resources will be merged together, with later resources overriding values set in the application or previous resources
migration_command: commands from the application and from sub-resources will be concatenated together joined with '&&' and run as a single shell command. The migration will only succeed if all the commands succeed
restart_command: commands from the application and from sub-resources will be evaluated in order
symlink_before_migrate: will be concatenated as a single array
callbacks: sub-resources callbacks will be invoked first, followed by the application callbacks
To use the application cookbook we recommend creating a cookbook named after the application, e.g.
metadata.rb you should declare a dependency on this cookbook and any framework cookbook the application may need. For example a Rails application may include:
depends 'application' depends 'application_ruby'
The default recipe should describe your application using the
application LWRP; you may also include additional recipes, for example to set up a database, queues, search engines and other components of your application.
A recipe using this LWRP may look like this:
application 'my_app' do path '/deploy/to/dir' owner 'app-user' group 'app-group' repository 'http://git.example.com/my-app.git' revision 'production' # Apply the rails LWRP from application_ruby rails do # Rails-specific configuration. See the README in the # application_ruby cookbook for more information. end # Apply the passenger_apache2 LWRP, also from application_ruby passenger_apache2 do # Passenger-specific configuration. end end
You can of course use any code necessary to determine the value of attributes:
application 'my_app' do repository 'http://git.example.com/my-app.git' revision node.chef_environment == 'production' ? 'production' : 'develop' end
Attributes from the application and from sub-resources are merged together:
application 'my_app' do restart_command 'kill -1 `cat /var/run/one.pid`' environment 'LC_ALL' => 'en', 'FOO' => 'bar' rails do restart_command 'touch /tmp/something' environment 'LC_ALL' => 'en_US' end passenger_apache2 do environment 'FOO' => 'baz' end end # at the end, you will have: # # restart_command #=> kill -1 `cat /var/run/one.pid` && touch /tmp/something # environment #=> LC_ALL=en_US FOO=baz
Most databases have the concept of migrations (or you can just use your own):
application 'my_app' do path '/deploy/to/dir' owner 'app-user' group 'app-group' repository 'http://git.example.com/my-app.git' revision 'production' php do migrate true migration_command 'your-applications-migrate-command' end end
This will run
your-applications-migrate-command, with the current directory set to the directory of the current checkout.
To use the application cookbook, we recommend creating a role named after the application, e.g.
my_app. Create a Ruby DSL role in your chef-repo, or create the role directly with knife.
name 'my_app' description 'My application deployment' run_list([ 'recipe[my_app::default]' ])
License and Authors
- Author: Adam Jacob (email@example.com)
- Author: Andrea Campi (firstname.lastname@example.org)
- Author: Joshua Timberman (email@example.com)
- Author: Noah Kantrowitz (firstname.lastname@example.org)
- Author: Seth Chisamore (email@example.com)
Copyright 2009-2013, Opscode, Inc. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
This cookbook has no specified dependencies.
application Cookbook CHANGELOG
This file is used to list changes made in each version of the application cookbook.
- Support for Chef 12.
strict_sshoption to enable host key checking.
keep_releasesoption to control number of releases to keep.
- Allow passing a path to a file for
- COOK-3343 - Can't parse release candidate version number
- COOK-3343 - Can't parse release candidate version number
- [COOK-3343] - Can't parse release candidate version number
- Removes compatability with Chef 10
- COOK-3564 - Replace calls to
- [COOK-3306]: Multiple Memory Leaks in Application Cookbook
- [COOK-2812]: application cookbook doesn't allow to specify a block as
- [COOK-2537]: Provide proper
respond_tobehavior when using
- [COOK-2713]: application resource should Allow sub-resource attributes to propogate up
- [COOK-2597]: Allow customization for
shallow_clonewhen doing a git deploy
This release is incompatible with previous releases (hence major version change). The recipes used in older versions are deprecated and completely removed. See README.md for further detail.
- [COOK-1673] -
deploy_revisionin the application cookbook gives an argument error
- [COOK-1820] - Application cookbook: remove deprecated recipes
- [COOK-1567] - Add git submodules to application cookbook
- [COOK-1312] - string callbacks fail with method not found (really included this time)
- [COOK-1332] - add
- [COOK-1333] - add example for running migrations
- [COOK-1360] - fix minor typos in README
- [COOK-1374] - use runit attributes in unicorn run script
This release introduces the LWRP for application deployment, as well as other improvements. The recipes will be deprecated in August 2012 as indicated by their warning messages and in the README.md.
- [COOK-634] - Implement LWRP for application deployment
- [COOK-1116] - use other SCMs than git
- [COOK-1252] - add
:force_deploythat maps to corresponding action of deploy resource
- [COOK-1253] - fix rollback error
- [COOK-1312] - string callbacks fail with method not found
- [COOK-1313] - implicit file based hooks aren't invoked
- [COOK-1318] - Create
to_arymethod to resolve issue in resources() lookup on "application[foo]" resources
- [COOK-1065] - use pip in virtualenv during deploy
- [COOK-606] application cookbook deployment recipes should use ipaddress instead of fqdn
- make the
chef_environmentlook like production rails env
- Use Chef 0.10's
FC003: Check whether you are running with chef server before using server-specific features: /tmp/cook/e56c620a4cd2c63388426a3a/application/libraries/default.rb:102
FC017: LWRP does not notify when updated: /tmp/cook/e56c620a4cd2c63388426a3a/application/providers/default.rb:23
FC017: LWRP does not notify when updated: /tmp/cook/e56c620a4cd2c63388426a3a/application/providers/default.rb:33
FC017: LWRP does not notify when updated: /tmp/cook/e56c620a4cd2c63388426a3a/application/providers/default.rb:43
FC031: Cookbook without metadata file: /tmp/cook/e56c620a4cd2c63388426a3a/application/metadata.rb:1
FC045: Consider setting cookbook name in metadata: /tmp/cook/e56c620a4cd2c63388426a3a/application/metadata.rb:1