Add docker kill --signal, closes #123

CHANGELOG.md

@@ -29,6 +29,7 @@ Attributes now available for all docker daemon flags as well as system IP forwar
 * Enhancement: [#118][]: Docker 0.10.0: Add --input flag to docker load
 * Enhancement: [#119][]: Docker 0.10.0: Add support for --env-file to load environment variables from files
 * Enhancement: [#120][]: Docker 0.10.0: Deprecate docker insert
+* Enhancement: [#123][]: Add docker kill --signal
 * Enhancement: [#124][]: Add all docker daemon options as attributes
 * Enhancement: [#125][]: Use dns* attributes to set docker daemon options, not defaults per-container
 * Enhancement: [#128][]: Add checksum attribute for binary downloads
@@ -455,6 +456,7 @@ Lots of community contributions this release -- thanks!
 [#118]: https://github.com/bflad/chef-docker/issues/118
 [#119]: https://github.com/bflad/chef-docker/issues/119
 [#120]: https://github.com/bflad/chef-docker/issues/120
+[#123]: https://github.com/bflad/chef-docker/issues/123
 [#124]: https://github.com/bflad/chef-docker/issues/124
 [#125]: https://github.com/bflad/chef-docker/issues/125
 [#126]: https://github.com/bflad/chef-docker/issues/126

README.md

@@ -343,6 +343,7 @@ Attribute | Description | Type | Default
 cookbook | Cookbook to grab any templates | String | docker
 init_type | Init type for container service handling | FalseClass, String | `node['docker']['container_init_type']`
 init_template | Template to use for init configuration | String | nil
+signal | Signal to send to the container | String | nil (implicitly KILL)
 socket_template | Template to use for configuring socket (relevent for init_type systemd only) | String | nil
 
 Kill a running container:
@@ -353,6 +354,15 @@ docker_container 'shipyard' do
 end
 ```
 
+Send SIGQUIT to a running container:
+
+```ruby
+docker_container 'shipyard' do
+  signal 'QUIT'
+  action :kill
+end
+```
+
 #### docker_container action :redeploy
 
 Stops, removes, and runs a container. Useful for notifications from image build/pull.

providers/container.rb

@@ -240,7 +240,10 @@ def kill
   if service?
     service_stop
   else
-    docker_cmd!("kill #{current_resource.id}")
+    kill_args = cli_args(
+      'signal' => new_resource.signal
+    )
+    docker_cmd!("kill #{kill_args} #{current_resource.id}")
   end
 end
 

resources/container.rb

@@ -42,6 +42,7 @@
 attribute :remove_automatically, :kind_of => [TrueClass, FalseClass], :default => false
 attribute :repository, :kind_of => [String]
 attribute :run, :kind_of => [String]
+attribute :signal, :kind_of => [String]
 attribute :socket_template, :kind_of => [String]
 attribute :source, :kind_of => [String]
 attribute :status, :kind_of => [String]