Apply --hosts and --roles filters to traefik hosts as well.

lib/kamal/commander/specifics.rb

@@ -19,7 +19,7 @@ class Kamal::Commander::Specifics
   end
 
   def traefik_hosts
-    specific_hosts || config.traefik_hosts
+    config.traefik_hosts & specified_hosts
   end
 
   def accessory_hosts

test/commander_test.rb

@@ -131,6 +131,20 @@ class CommanderTest < ActiveSupport::TestCase
     assert_equal [ "1.1.1.3", "1.1.1.4", "1.1.1.1", "1.1.1.2" ], @kamal.hosts
   end
 
+  test "traefik hosts should observe filtered roles" do
+    configure_with(:deploy_with_aliases)
+
+    @kamal.specific_roles = [ "web_tokyo" ]
+    assert_equal [ "1.1.1.3", "1.1.1.4" ], @kamal.traefik_hosts
+  end
+
+  test "traefik hosts should observe filtered hosts" do
+    configure_with(:deploy_with_aliases)
+
+    @kamal.specific_hosts = [ "1.1.1.4" ]
+    assert_equal [ "1.1.1.4" ], @kamal.traefik_hosts
+  end
+
   private
     def configure_with(variant)
       @kamal = Kamal::Commander.new.tap do |kamal|

test/configuration_test.rb

@@ -83,6 +83,15 @@ class ConfigurationTest < ActiveSupport::TestCase
     assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3" ], config.traefik_hosts
   end
 
+  test "filtered traefik hosts" do
+    assert_equal [ "1.1.1.1", "1.1.1.2" ], @config_with_roles.traefik_hosts
+
+    @deploy_with_roles[:servers]["workers"]["traefik"] = true
+    config = Kamal::Configuration.new(@deploy_with_roles)
+
+    assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3" ], config.traefik_hosts
+  end
+
   test "version no git repo" do
     ENV.delete("VERSION")