feat: self-update of master and agents (#15)

internal/master/web/server.go

@@ -883,6 +883,7 @@ func agentSnippet(cfg Config, token string) string {
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
       # - /path/to/stacks:/path/to/stacks  # mount each stacks directory at the same path, read-write
+      #   (also this agent's own stack directory, or it cannot update itself)
       # - /root/.docker/config.json:/docker-config/config.json:ro
 `, cfg.AgentImage, cfg.AgentURL, cfg.MasterKey, token)
 }

internal/master/web/server_test.go

@@ -303,7 +303,8 @@ func TestOverview_GroupsServicesPerMachineAndSwarm(t *testing.T) {
 	assert.Contains(t, body, `<span class="stk">slusk</span>`)
 	assert.Contains(t, body, "jellyfin_jellyfin", "Swarm service names are shown as they are")
 	assert.Contains(t, body, "sha256:0f42497a69fa…", "digests are shortened")
-	assert.Contains(t, body, "Managed outside")
+	assert.Contains(t, body, `<span class="tag f-out">This agent</span>`)
+	assert.NotContains(t, body, "Managed outside")
 	assert.Less(t, strings.Index(body, ">Swarm</h2>"), strings.Index(body, ">node-2</h2>"), "a cluster is followed by its managers' machines")
 	assert.Contains(t, body, `class="sub" data-machine="agent-2"`, "the machine filter lists the manager under the cluster")
 }
@@ -513,6 +514,7 @@ func TestAgentSnippet(t *testing.T) {
 	assert.Contains(t, snippet, "UPDATE_TIMEOUT: 5m")
 	assert.Contains(t, snippet, "      # DOCKER_CONFIG: /docker-config\n")
 	assert.Contains(t, snippet, "      # - /path/to/stacks:/path/to/stacks  # mount each stacks directory at the same path, read-write\n")
+	assert.Contains(t, snippet, "also this agent's own stack directory")
 	assert.Contains(t, snippet, "AGENT_TOKEN: tok")
 }
 
@@ -762,7 +764,8 @@ func TestOverview_ShowsModeToggleAndAvailableBadge(t *testing.T) {
 		assert.Contains(t, body, `<input type="hidden" name="mode" value="auto">`, "manual services toggle to auto: "+path)
 		assert.Contains(t, body, `aria-checked="false" disabled title="`+model.ReasonBuilt+`">`, "blocked manual services get a disabled switch: "+path)
 		assert.Contains(t, body, `<span class="na">`+model.ReasonBuilt+`</span>`, "and say why: "+path)
-		assert.Contains(t, body, `<span class="na">n/a</span>`, "services managed outside have no switch: "+path)
+		assert.Contains(t, body, `action="/services/3/mode"`, "the agent's own service has a switch like any other: "+path)
+		assert.NotContains(t, body, `<span class="na">n/a</span>`, path)
 	}
 }
 

internal/master/web/templates/overview.html

@@ -79,11 +79,10 @@
       {{if .AvailableRef}}<span class="tag f-up" title="{{.AvailableRef}}">Update available<em>{{.AvailableTag}}</em></span>{{end}}
       {{if followsNoTag .Service}}<span class="tag f-notag">Follows no tag</span>{{end}}
       {{if .LastPollError}}<span class="tag f-err" title="{{.LastPollError}}">Poll failed</span>{{end}}
-      {{if .Self}}<span class="tag f-out">Managed outside</span>{{end}}
+      {{if .Self}}<span class="tag f-out">This agent</span>{{end}}
     </div>
     <div class="mode">
-      {{if .Self}}<span class="na">n/a</span>
-      {{else}}<form method="post" action="/services/{{.ID}}/mode">
+      <form method="post" action="/services/{{.ID}}/mode">
         <input type="hidden" name="csrf_token" value="{{$.CSRF}}">
         <input type="hidden" name="return" value="overview">
         {{if eq .UpdateMode "auto"}}<input type="hidden" name="mode" value="manual">
@@ -91,7 +90,7 @@
         {{else}}<input type="hidden" name="mode" value="auto">
         <button type="submit" class="sw" role="switch" aria-checked="false"{{if .AutoBlocked}} disabled title="{{.AutoBlocked}}"{{end}}><i></i>Manual</button>
         {{if .AutoBlocked}}<span class="na">{{.AutoBlocked}}</span>{{end}}{{end}}
-      </form>{{end}}
+      </form>
     </div>
   </div>
   {{end}}