refactoring monitor code, support prometheus (fatedier#1668)

* refactoring monitor code, support prometheus
* remove vendor

.gitignore

@@ -27,6 +27,7 @@ _testmain.go
 bin/
 packages/
 test/bin/
+vendor/
 
 # Cache
 *.swp

Makefile

@@ -1,4 +1,5 @@
 export PATH := $(GOPATH)/bin:$(PATH)
+export GO111MODULE=on
 
 all: fmt build
 

cmd/frps/main.go

@@ -21,6 +21,7 @@ import (
 	"github.com/fatedier/golib/crypto"
 
 	_ "github.com/fatedier/frp/assets/frps/statik"
+	_ "github.com/fatedier/frp/models/metrics"
 )
 
 func main() {

conf/frps_full.ini

@@ -33,6 +33,9 @@ dashboard_port = 7500
 dashboard_user = admin
 dashboard_pwd = admin
 
+# enable_prometheus will export prometheus metrics on {dashboard_addr}:{dashboard_port} in /metrics api.
+enable_prometheus = true
+
 # dashboard assets directory(only for debug mode)
 # assets_dir = ./static
 # console or real logFile path like ./frps.log

go.mod

@@ -17,13 +17,13 @@ require (
 	github.com/klauspost/reedsolomon v1.9.1 // indirect
 	github.com/mattn/go-runewidth v0.0.4 // indirect
 	github.com/pires/go-proxyproto v0.0.0-20190111085350-4d51b51e3bfc
-	github.com/pkg/errors v0.8.0 // indirect
 	github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35 // indirect
+	github.com/prometheus/client_golang v1.4.1
 	github.com/rakyll/statik v0.1.1
 	github.com/rodaine/table v1.0.0
 	github.com/spf13/cobra v0.0.3
 	github.com/spf13/pflag v1.0.1 // indirect
-	github.com/stretchr/testify v1.3.0
+	github.com/stretchr/testify v1.4.0
 	github.com/templexxx/cpufeat v0.0.0-20170927014610-3794dfbfb047 // indirect
 	github.com/templexxx/xor v0.0.0-20170926022130-0af8e873c554 // indirect
 	github.com/tjfoc/gmsm v0.0.0-20171124023159-98aa888b79d8 // indirect

go.sum

@@ -1,81 +1,141 @@
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models/config/server_common.go

@@ -48,31 +48,25 @@ type ServerCommonConf struct {
 	// ProxyBindAddr specifies the address that the proxy binds to. This value
 	// may be the same as BindAddr. By default, this value is "0.0.0.0".
 	ProxyBindAddr string `json:"proxy_bind_addr"`
-
 	// VhostHttpPort specifies the port that the server listens for HTTP Vhost
 	// requests. If this value is 0, the server will not listen for HTTP
 	// requests. By default, this value is 0.
 	VhostHttpPort int `json:"vhost_http_port"`
-
 	// VhostHttpsPort specifies the port that the server listens for HTTPS
 	// Vhost requests. If this value is 0, the server will not listen for HTTPS
 	// requests. By default, this value is 0.
 	VhostHttpsPort int `json:"vhost_https_port"`
-
 	// TcpMuxHttpConnectPort specifies the port that the server listens for TCP
 	// HTTP CONNECT requests. If the value is 0, the server will not multiplex TCP
 	// requests on one single port. If it's not - it will listen on this value for
 	// HTTP CONNECT requests. By default, this value is 0.
 	TcpMuxHttpConnectPort int `json:"tcpmux_httpconnect_port"`
-
 	// VhostHttpTimeout specifies the response header timeout for the Vhost
 	// HTTP server, in seconds. By default, this value is 60.
 	VhostHttpTimeout int64 `json:"vhost_http_timeout"`
-
 	// DashboardAddr specifies the address that the dashboard binds to. By
 	// default, this value is "0.0.0.0".
 	DashboardAddr string `json:"dashboard_addr"`
-
 	// DashboardPort specifies the port that the dashboard listens on. If this
 	// value is 0, the dashboard will not be started. By default, this value is
 	// 0.
@@ -83,6 +77,9 @@ type ServerCommonConf struct {
 	// DashboardUser specifies the password that the dashboard will use for
 	// login. By default, this value is "admin".
 	DashboardPwd string `json:"dashboard_pwd"`
+	// EnablePrometheus will export prometheus metrics on {dashboard_addr}:{dashboard_port}
+	// in /metrics api.
+	EnablePrometheus bool `json:"enable_prometheus"`
 	// AssetsDir specifies the local directory that the dashboard will load
 	// resources from. If this value is "", assets will be loaded from the
 	// bundled executable using statik. By default, this value is "".
@@ -167,6 +164,7 @@ func GetDefaultServerConf() ServerCommonConf {
 		DashboardPort:          0,
 		DashboardUser:          "admin",
 		DashboardPwd:           "admin",
+		EnablePrometheus:       false,
 		AssetsDir:              "",
 		LogFile:                "console",
 		LogWay:                 "console",
@@ -312,6 +310,10 @@ func UnmarshalServerConfFromIni(content string) (cfg ServerCommonConf, err error
 		cfg.DashboardPwd = tmpStr
 	}
 
+	if tmpStr, ok = conf.Get("common", "enable_prometheus"); ok && tmpStr == "true" {
+		cfg.EnablePrometheus = true
+	}
+
 	if tmpStr, ok = conf.Get("common", "assets_dir"); ok {
 		cfg.AssetsDir = tmpStr
 	}