Added support for the 'registry-mirror' docker daemon option.

README.md

@@ -165,6 +165,7 @@ no_proxy | NO_PROXY environment variable | String | nil
 options | Additional options to pass to docker. These could be flags like "-api-enable-cors". | String | nil
 pidfile | Path to use for daemon PID file | String | nil (implicitly /var/run/docker.pid)
 ramdisk | Set DOCKER_RAMDISK when using RAM disk | TrueClass or FalseClass | false
+registry-mirror | List of docker registry mirrors | String, Array | nil
 restart | Restart containers on boot | TrueClass or FalseClass | auto-detected (see attributes/default.rb)
 selinux_enabled | Enable SELinux | TrueClass or FalseClass | nil
 storage_driver | Storage driver for docker | String | nil

attributes/default.rb

@@ -153,6 +153,7 @@
 default['docker']['options'] = nil
 default['docker']['pidfile'] = nil
 default['docker']['ramdisk'] = false
+default['docker']['registry-mirror'] = nil
 default['docker']['selinux_enabled'] = nil
 default['docker']['storage_driver'] = nil
 default['docker']['storage_opt'] = nil

libraries/helpers.rb

@@ -90,6 +90,7 @@ def self.daemon_cli_args(node)
         'iptables' => node['docker']['iptables'],
         'mtu' => node['docker']['mtu'],
         'pidfile' => node['docker']['pidfile'],
+        'registry-mirror' => Array(node['docker']['registry-mirror']),
         'restart' => node['docker']['restart'],
         'selinux-enabled' => node['docker']['selinux_enabled'],
         'storage-driver' => node['docker']['storage_driver'],

spec/systemd_spec.rb

@@ -347,6 +347,32 @@
     end
   end
 
+  context 'when registry-mirror is set with String' do
+    let(:chef_run) do
+      runner = ChefSpec::Runner.new
+      runner.node.set['docker']['registry-mirror'] = 'http://registry.example.com:1337'
+      runner.converge(described_recipe)
+    end
+
+    it 'adds registry-mirror flag to docker service' do
+      expect(chef_run).to render_file('/usr/lib/systemd/system/docker.service').with_content(
+        %r{^ExecStart=/usr/bin/docker -d.* --registry-mirror=http://registry\.example\.com:1337.*})
+    end
+  end
+
+  context 'when registry-mirror is set with Array' do
+    let(:chef_run) do
+      runner = ChefSpec::Runner.new
+      runner.node.set['docker']['registry-mirror'] = %w(http://registry.example.com:1337 http://registry.example.com:1338)
+      runner.converge(described_recipe)
+    end
+
+    it 'adds registry-mirror flags to docker service' do
+      expect(chef_run).to render_file('/usr/lib/systemd/system/docker.service').with_content(
+        %r{^ExecStart=/usr/bin/docker -d.* --registry-mirror=http://registry\.example\.com:1337 --registry-mirror=http://registry\.example\.com:1338.*})
+    end
+  end
+
   context 'when storage_driver is set' do
     let(:chef_run) do
       runner = ChefSpec::Runner.new

spec/sysv_spec.rb

@@ -376,6 +376,32 @@
     end
   end
 
+  context 'when registry-mirror is set with String' do
+    let(:chef_run) do
+      runner = ChefSpec::Runner.new
+      runner.node.set['docker']['registry-mirror'] = 'http://registry.example.com:1337'
+      runner.converge(described_recipe)
+    end
+
+    it 'adds registry-mirror flag to docker service' do
+      expect(chef_run).to render_file('/etc/default/docker').with_content(
+        %r{^DOCKER_OPTS='.* --registry-mirror=http://registry\.example\.com:1337.*'$})
+    end
+  end
+
+  context 'when registry-mirror is set with Array' do
+    let(:chef_run) do
+      runner = ChefSpec::Runner.new
+      runner.node.set['docker']['registry-mirror'] = %w(http://registry.example.com:1337 http://registry.example.com:1338)
+      runner.converge(described_recipe)
+    end
+
+    it 'adds registry-mirror flags to docker service' do
+      expect(chef_run).to render_file('/etc/default/docker').with_content(
+        %r{^DOCKER_OPTS='.* --registry-mirror=http://registry\.example\.com:1337 --registry-mirror=http://registry\.example\.com:1338.*'$})
+    end
+  end
+
   context 'when storage_driver is set' do
     let(:chef_run) do
       runner = ChefSpec::Runner.new

spec/upstart_spec.rb

@@ -377,6 +377,32 @@
     end
   end
 
+  context 'when registry-mirror is set with String' do
+    let(:chef_run) do
+      runner = ChefSpec::Runner.new
+      runner.node.set['docker']['registry-mirror'] = 'http://registry.example.com:1337'
+      runner.converge(described_recipe)
+    end
+
+    it 'adds registry-mirror flag to docker service' do
+      expect(chef_run).to render_file('/etc/default/docker').with_content(
+        %r{^DOCKER_OPTS='.* --registry-mirror=http://registry\.example\.com:1337.*'$})
+    end
+  end
+
+  context 'when registry-mirror is set with Array' do
+    let(:chef_run) do
+      runner = ChefSpec::Runner.new
+      runner.node.set['docker']['registry-mirror'] = %w(http://registry.example.com:1337 http://registry.example.com:1338)
+      runner.converge(described_recipe)
+    end
+
+    it 'adds registry-mirror flags to docker service' do
+      expect(chef_run).to render_file('/etc/default/docker').with_content(
+        %r{^DOCKER_OPTS='.* --registry-mirror=http://registry\.example\.com:1337 --registry-mirror=http://registry\.example\.com:1338.*'$})
+    end
+  end
+
   context 'when storage_driver is set' do
     let(:chef_run) do
       runner = ChefSpec::Runner.new