Add support for volumes

README.md

@@ -96,6 +96,15 @@ If the referenced secret ENVs are missing, the configuration will be halted with
 Note: Marking an ENV as secret currently only redacts its value in the output for MRSK. The ENV is still injected in the clear into the container at runtime.
 
 
+### Adding volumes
+
+You can add custom volumes into the app containers using `volumes`:
+
+```yaml
+volumes:
+  - "/local/path:/container/path"
+```
+
 ### Splitting servers into different roles
 
 If your application uses separate hosts for running jobs or other roles beyond the default web running, you can specify these hosts and their custom entrypoint command like so:

lib/mrsk/commands/app.rb

@@ -10,6 +10,7 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
       "--name", config.service_with_version,
       *rails_master_key_arg,
       *role.env_args,
+      *config.volumes,
       *role.label_args,
       config.absolute_image,
       role.cmd
@@ -43,6 +44,7 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
       ("-it" if interactive),
       *rails_master_key_arg,
       *config.env_args,
+      *config.volumes,
       config.service_with_version,
       *command
   end
@@ -53,6 +55,7 @@ class Mrsk::Commands::App < Mrsk::Commands::Base
       "--rm",
       *rails_master_key_arg,
       *config.env_args,
+      *config.volumes,
       config.absolute_image,
       *command
   end

lib/mrsk/configuration.rb

@@ -40,7 +40,6 @@ class Mrsk::Configuration
     ensure_required_keys_present if validate
   end
 
-
   def roles
     @roles ||= role_names.collect { |role_name| Role.new(role_name, config: self) }
   end
@@ -61,7 +60,6 @@ class Mrsk::Configuration
     roles.select(&:running_traefik?).flat_map(&:hosts)
   end
 
-
   def version
     @version
   end
@@ -78,7 +76,6 @@ class Mrsk::Configuration
     "#{service}-#{version}"
   end
 
-
   def env_args
     if config.env.present?
       argumentize_env_with_secrets(config.env)
@@ -87,6 +84,12 @@ class Mrsk::Configuration
     end
   end
 
+  def volumes
+    return unless config.volumes.present?
+
+    config.volumes.map { |volume| "--volume #{volume}" }
+  end
+
   def ssh_user
     config.ssh_user || "root"
   end
@@ -110,11 +113,11 @@ class Mrsk::Configuration
       service_with_version: service_with_version,
       env_args: env_args,
       ssh_options: ssh_options,
-      builder: config.builder
+      builder: config.builder,
+      volumes: volumes
     }.compact
   end
 
-
   private
     attr_accessor :config
 

test/commands/app_test.rb

@@ -15,6 +15,13 @@ class CommandsAppTest < ActiveSupport::TestCase
       [:docker, :run, "-d", "--restart unless-stopped", "--name", "app-missing", "-e", "RAILS_MASTER_KEY=456", "--label", "service=app", "--label", "role=web", "--label", "traefik.http.routers.app.rule='PathPrefix(`/`)'", "--label", "traefik.http.services.app.loadbalancer.healthcheck.path=/up", "--label", "traefik.http.services.app.loadbalancer.healthcheck.interval=1s", "--label", "traefik.http.middlewares.app.retry.attempts=3", "--label", "traefik.http.middlewares.app.retry.initialinterval=500ms", "dhh/app:missing"], @app.run
   end
 
+  test "run with volumes" do
+    @config[:volumes] = ["/local/path:/container/path" ]
+
+    assert_equal \
+      [:docker, :run, "-d", "--restart unless-stopped", "--name", "app-missing", "-e", "RAILS_MASTER_KEY=456", "--volume /local/path:/container/path", "--label", "service=app", "--label", "role=web", "--label", "traefik.http.routers.app.rule='PathPrefix(`/`)'", "--label", "traefik.http.services.app.loadbalancer.healthcheck.path=/up", "--label", "traefik.http.services.app.loadbalancer.healthcheck.interval=1s", "--label", "traefik.http.middlewares.app.retry.attempts=3", "--label", "traefik.http.middlewares.app.retry.initialinterval=500ms", "dhh/app:missing"], @app.run
+  end
+
   test "run with" do
     assert_equal \
       [ :docker, :run, "--rm", "-e", "RAILS_MASTER_KEY=456", "dhh/app:missing", "bin/rails", "db:setup" ],

test/configuration_test.rb

@@ -9,7 +9,8 @@ class ConfigurationTest < ActiveSupport::TestCase
       service: "app", image: "dhh/app",
       registry: { "username" => "dhh", "password" => "secret" },
       env: { "REDIS_URL" => "redis://x/y" },
-      servers: [ "1.1.1.1", "1.1.1.2" ]
+      servers: [ "1.1.1.1", "1.1.1.2" ],
+      volumes: ["/local/path:/container/path"]
     }
 
     @config = Mrsk::Configuration.new(@deploy)
@@ -84,7 +85,6 @@ class ConfigurationTest < ActiveSupport::TestCase
     assert_equal "app-missing", @config.service_with_version
   end
 
-
   test "env args" do
     assert_equal [ "-e", "REDIS_URL=redis://x/y" ], @config.env_args
   end
@@ -134,6 +134,9 @@ class ConfigurationTest < ActiveSupport::TestCase
     assert_equal "456", @config.master_key
   end
 
+  test "volumes" do
+    assert_equal ["--volume /local/path:/container/path"], @config.volumes
+  end
 
   test "erb evaluation of yml config" do
     config = Mrsk::Configuration.create_from Pathname.new(File.expand_path("fixtures/deploy.erb.yml", __dir__))
@@ -159,6 +162,6 @@ class ConfigurationTest < ActiveSupport::TestCase
   end
 
   test "to_h" do
-    assert_equal({ :roles=>["web"], :hosts=>["1.1.1.1", "1.1.1.2"], :primary_host=>"1.1.1.1", :version=>"missing", :repository=>"dhh/app", :absolute_image=>"dhh/app:missing", :service_with_version=>"app-missing", :env_args=>["-e", "REDIS_URL=redis://x/y"], :ssh_options=>{:user=>"root", :auth_methods=>["publickey"]} }, @config.to_h)
+    assert_equal({ :roles=>["web"], :hosts=>["1.1.1.1", "1.1.1.2"], :primary_host=>"1.1.1.1", :version=>"missing", :repository=>"dhh/app", :absolute_image=>"dhh/app:missing", :service_with_version=>"app-missing", :env_args=>["-e", "REDIS_URL=redis://x/y"], :ssh_options=>{:user=>"root", :auth_methods=>["publickey"]}, :volumes=>["--volume /local/path:/container/path"] }, @config.to_h)
   end
 end