add /metrics to swagger api

Signed-off-by: yeya24 <yb532204897@gmail.com>

apis/swagger.yml

@@ -58,6 +58,17 @@ paths:
         500:
           $ref: "#/responses/500ErrorResponse"
 
+  /metrics:
+    get:
+      summary: "Get Prometheus metrics"
+      description: "Get Prometheus metrics"
+      responses:
+        200:
+          description: "no error"
+          schema:
+            type: "string"
+            example: "go_goroutines 1"
+
   /peer/registry:
     post:
       summary: "registry a task"

cmd/dfdaemon/app/version.go

@@ -31,7 +31,7 @@ func init() {
 
 // versionExample shows examples in version command, and is used in auto-generated cli docs.
 func versionExample() string {
-	return `dfdaemon, version  0.4.1
+	return `dfdaemon version  0.4.1
   Git commit:     6fd5c8f
   Build date:     20190717-15:57:52
   Go version:     go1.12.6

cmd/dfget/app/version.go

@@ -47,7 +47,7 @@ func init() {
 
 // versionExample shows examples in version command, and is used in auto-generated cli docs.
 func versionExample() string {
-	return `dfget, version  0.4.1
+	return `dfget version  0.4.1
   Git commit:     6fd5c8f
   Build date:     20190717-15:57:52
   Go version:     go1.12.6

cmd/supernode/app/version.go

@@ -31,7 +31,7 @@ func init() {
 
 // versionExample shows examples in version command, and is used in auto-generated cli docs.
 func versionExample() string {
-	return `supernode, version  0.4.1
+	return `supernode version  0.4.1
   Git commit:     6fd5c8f
   Build date:     20190717-15:57:52
   Go version:     go1.12.6

version/version.go

@@ -78,7 +78,7 @@ func init() {
 
 // versionInfoTmpl contains the template used by Info.
 var versionInfoTmpl = `
-{{.program}}, version  {{.version}}
+{{.program}} version  {{.version}}
   Git commit:     {{.revision}}
   Build date:     {{.buildDate}}
   Go version:     {{.goVersion}}