Add role concern with specialized cmds for job running

lib/mrsk/configuration/role.rb

@@ -0,0 +1,63 @@
+class Mrsk::Configuration::Role
+  delegate :argumentize, to: Mrsk::Configuration
+
+  attr_accessor :name
+
+  def initialize(name, config:)
+   @name, @config = name.inquiry, config
+  end
+
+  def hosts
+    @hosts ||= extract_hosts_from_config
+  end
+
+  def label_args
+    argumentize "--label", labels
+  end
+
+  def cmd
+    specializations["cmd"]
+  end
+
+  private
+    attr_accessor :config
+
+    def extract_hosts_from_config
+      if config.servers.is_a?(Array)
+        config.servers
+      else
+        servers = config.servers[name]
+        servers.is_a?(Array) ? servers : servers["hosts"]
+      end
+    end
+
+    def labels
+      if name.web?
+        default_labels.merge(traefik_labels) 
+      else
+        default_labels
+      end
+    end
+
+    def default_labels
+      { "service" => config.service, "role" => name }
+    end
+
+    def traefik_labels
+      {
+        "traefik.http.routers.#{config.service}.rule" => "'PathPrefix(`/`)'",
+        "traefik.http.services.#{config.service}.loadbalancer.healthcheck.path" => "/up",
+        "traefik.http.services.#{config.service}.loadbalancer.healthcheck.interval" => "1s",
+        "traefik.http.middlewares.#{config.service}.retry.attempts" => "3",
+        "traefik.http.middlewares.#{config.service}.retry.initialinterval" => "500ms"
+      }
+    end
+
+    def specializations
+      if config.servers.is_a?(Array) || config.servers[name].is_a?(Array)
+        { }
+      else
+        config.servers[name].without("hosts")
+      end
+    end
+end