Create config stub with mrsk:init

README.md

@@ -4,19 +4,18 @@ MRSK ships zero-downtime deploys of Rails apps packed as containers to any host.
 
 ## Installation
 
-Create a configuration file for MRSK in `config/deploy.yml` that looks like this:
+Add the gem with `bundle add mrsk`, then run `rake mrsk:init`, and then edit the new file in `config/deploy.yml` to use the proper service name, image reference, servers to deploy on, and so on. It could look something like this:
 
 ```yaml
-service: my-app
+service: hey
-image: name/my-app
+image: 37s/hey
 servers:
   - xxx.xxx.xxx.xxx
   - xxx.xxx.xxx.xxx
 env:
-  DATABASE_URL: mysql2://localhost/my-app_production/
+  DATABASE_URL: mysql2://db1/hey_production/
-  REDIS_URL: redis://host:6379/1
+  REDIS_URL: redis://redis1:6379/1
 registry:
-  # No server definition needed if using Docker Hub
   server: registry.digitalocean.com
   username: <%= Rails.application.credentials.registry["username"] %>
   password: <%= Rails.application.credentials.registry["password"] %>

lib/tasks/mrsk/mrsk.rake

@@ -13,8 +13,11 @@ namespace :mrsk do
   desc "Display information about Traefik and app containers"
   task info: [ "traefik:info", "app:info" ]
 
-  desc "Create config stub"
+  desc "Create config stub in config/deploy.yml"
   task :init do
-    Rails.root.join("config/deploy.yml")
+    require "fileutils"
+    FileUtils.cp_r \
+      Pathname.new(File.expand_path("templates/deploy.yml", __dir__)),
+      Rails.root.join("config/deploy.yml"))
   end
 end

lib/tasks/mrsk/templates/deploy.yml

@@ -0,0 +1,20 @@
+# Name of your application will be used for uniquely configuring Traefik and app containers
+service: my-app
+
+# Name of the container image
+image: user/chat
+
+# All the servers targeted for deploy. You can reference a single server for a command by using SERVERS=xxx.xxx.xxx.xxx
+servers:
+  - xxx.xxx.xxx.xxx
+
+# The following envs are made available to the container when started
+env:
+  # Remember never to put passwords or tokens directly into this file, use encrypted credentials
+  # REDIS_URL: redis://x/y
+
+registry:
+  # Specify the registry server, if you're not using Docker Hub
+  # server: registry.digitalocean.com / ghcr.io / ...
+  username: <%= Rails.application.credentials.registry["username"] %>
+  password: <%= Rails.application.credentials.registry["password"] %>