Merge pull request #7 from hipages/code-cleanup

Code cleanup

.circleci/config.yml

@@ -1,23 +1,35 @@
-# Golang CircleCI 2.0 configuration file
-#
-# Check https://circleci.com/docs/2.0/language-go/ for more details
+defaults: &defaults
+  working_directory: /go/src/github.com/hipages/php-fpm_exporter
+
 version: 2
 jobs:
 
-  build:
+  test:
+    <<: *defaults
     docker:
       - image: circleci/golang:1.9
-    working_directory: /go/src/github.com/hipages/php-fpm_exporter
     steps:
       - checkout
       - run: curl -L -s https://github.com/golang/dep/releases/download/v0.4.1/dep-linux-amd64 -o /go/bin/dep && chmod +x /go/bin/dep
       - run: dep ensure -vendor-only
       - run: go test -v ./...
 
-  deploy:
+  lint:
+    <<: *defaults
+    docker:
+      - image: circleci/golang:1.9
+    steps:
+      - checkout
+      - run: curl -L -s https://github.com/golang/dep/releases/download/v0.4.1/dep-linux-amd64 -o /go/bin/dep && chmod +x /go/bin/dep
+      - run: dep ensure -vendor-only
+      - run: curl -L -s https://github.com/alecthomas/gometalinter/releases/download/v2.0.5/gometalinter-2.0.5-linux-amd64.tar.gz | tar xvfz - -C /go/bin/ --strip 1
+#      - run: gometalinter --disable-all --enable=errcheck --enable=vet --enable=vetshadow --vendor ./...
+      - run: gometalinter --disable-all --enable=vet --enable=vetshadow --vendor ./...
+
+  deploy:
+    <<: *defaults
     docker:
       - image: circleci/golang:1.9
-    working_directory: /go/src/github.com/hipages/php-fpm_exporter
     steps:
       - checkout
       - setup_remote_docker:
@@ -31,13 +43,17 @@ workflows:
   version: 2
   build-n-deploy:
     jobs:
-      - build:
+      - test:
+          filters:
+            tags:
+              only: /^v.*/
+      - lint:
           filters:
             tags:
               only: /^v.*/
       - deploy:
           requires:
-            - build
+            - test
           filters:
             branches:
               ignore: /.*/

README.md

@@ -35,7 +35,8 @@ The `server` command runs the server required for prometheus to retrieve the sta
 | `--web.listen-address` | Address on which to expose metrics and web interface. | `PHP_FPM_WEB_LISTEN_ADDRESS` | [`:9253`](https://github.com/prometheus/prometheus/wiki/Default-port-allocations)         |
 | `--web.telemetry-path` | Path under which to expose metrics.                   | `PHP_FPM_WEB_TELEMETRY_PATH` | `/metrics`      |
 | `--phpfpm.scrape-uri`  | FastCGI address, e.g. unix:///tmp/php.sock;/status or tcp://127.0.0.1:9000/status | `PHP_FPM_SCRAPE_URI` | `tcp://127.0.0.1:9000/status` |
-| `--log.level`          | Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal] (default "error") | PHP_FPM_LOG_LEVEL | info |
+| `--phpfpm.fix-process-count`  | Enable to calculate process numbers via php-fpm_exporter since PHP-FPM sporadically reports wrong active/idle/total process numbers. | `PHP_FPM_FIX_PROCESS_COUNT`| `false` |
+| `--log.level`          | Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal] (default "error") | `PHP_FPM_LOG_LEVEL` | info |
 
 ### CLI Examples
 
@@ -54,6 +55,11 @@ The `server` command runs the server required for prometheus to retrieve the sta
   php-fpm_exporter server --phpfpm.scrape-uri tcp://127.0.0.1:9000/status,tcp://127.0.0.1:9001/status
   ```
 
+* Run as server and enable process count fix via environment variable:
+  ```
+  PHP_FPM_FIX_PROCESS_COUNT=1 go run main.go server --web.listen-address ":12345" --log.level=debug
+  ```
+
 ### Docker Examples
 
 * Run docker manually
@@ -75,6 +81,8 @@ The `server` command runs the server required for prometheus to retrieve the sta
 
   [![asciicast](https://asciinema.org/a/1msR8nqAsFdHzROosUb7PiHvf.png)](https://asciinema.org/a/1msR8nqAsFdHzROosUb7PiHvf)
 
+### Kubernetes Example
+
 ## Metrics collected
 
 ```
@@ -94,6 +102,12 @@ The `server` command runs the server required for prometheus to retrieve the sta
 # TYPE phpfpm_max_children_reached counter
 # HELP phpfpm_max_listen_queue The maximum number of requests in the queue of pending connections since FPM has started.
 # TYPE phpfpm_max_listen_queue counter
+# HELP phpfpm_process_last_request_cpu
+# TYPE phpfpm_process_last_request_cpu gauge
+# HELP phpfpm_process_last_request_memory
+# TYPE phpfpm_process_last_request_memory gauge
+# HELP phpfpm_process_requests
+# TYPE phpfpm_process_requests counter
 # HELP phpfpm_scrape_failures The number of failures scraping from PHP-FPM.
 # TYPE phpfpm_scrape_failures counter
 # HELP phpfpm_slow_requests The number of requests that exceeded your 'request_slowlog_timeout' value.

cmd/get.go

@@ -16,11 +16,12 @@ package cmd
 import (
 	"encoding/json"
 	"fmt"
+	"time"
+
 	"github.com/davecgh/go-spew/spew"
 	"github.com/gosuri/uitable"
 	"github.com/hipages/php-fpm_exporter/phpfpm"
 	"github.com/spf13/cobra"
-	"time"
 )
 
 // Configuration variables
@@ -44,7 +45,9 @@ var getCmd = &cobra.Command{
 			pm.Add(uri)
 		}
 
-		pm.Update()
+		if err := pm.Update(); err != nil {
+			log.Fatal("Could not update pool.", err)
+		}
 
 		switch output {
 		case "json":

cmd/root.go

@@ -101,3 +101,15 @@ func initLogger() {
 
 	log.SetLevel(lvl)
 }
+
+func mapEnvVars(envs map[string]string, cmd *cobra.Command) {
+	for env, flag := range envs {
+		flag := cmd.Flags().Lookup(flag)
+		flag.Usage = fmt.Sprintf("%v [env %v]", flag.Usage, env)
+		if value := os.Getenv(env); value != "" {
+			if err := flag.Value.Set(value); err != nil {
+				log.Error(err)
+			}
+		}
+	}
+}

cmd/server.go

@@ -15,15 +15,15 @@ package cmd
 
 import (
 	"context"
-	"fmt"
-	"github.com/hipages/php-fpm_exporter/phpfpm"
-	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promhttp"
-	"github.com/spf13/cobra"
 	"net/http"
 	"os"
 	"os/signal"
 	"time"
+
+	"github.com/hipages/php-fpm_exporter/phpfpm"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"github.com/spf13/cobra"
 )
 
 // Configuration variables
@@ -102,7 +102,9 @@ to quickly create a Cobra application.`,
 		defer cancel()
 		// Doesn't block if no connections, but will otherwise wait
 		// until the timeout deadline.
-		srv.Shutdown(ctx)
+		if err := srv.Shutdown(ctx); err != nil {
+			log.Fatal("Error during shutdown", err)
+		}
 		// Optionally, you could run srv.Shutdown in a goroutine and block on
 		// <-ctx.Done() if your application should wait for other services
 		// to finalize based on context cancellation.
@@ -114,14 +116,6 @@ to quickly create a Cobra application.`,
 func init() {
 	RootCmd.AddCommand(serverCmd)
 
-	// Here you will define your flags and configuration settings.
-
-	// Cobra supports Persistent Flags which will work for this command
-	// and all subcommands, e.g.:
-	// serverCmd.PersistentFlags().String("foo", "", "A help for foo")
-
-	// Cobra supports local flags which will only run when this command
-	// is called directly, e.g.:
 	serverCmd.Flags().StringVar(&listeningAddress, "web.listen-address", ":9253", "Address on which to expose metrics and web interface.")
 	serverCmd.Flags().StringVar(&metricsEndpoint, "web.telemetry-path", "/metrics", "Path under which to expose metrics.")
 	serverCmd.Flags().StringSliceVar(&scrapeURIs, "phpfpm.scrape-uri", []string{"tcp://127.0.0.1:9000/status"}, "FastCGI address, e.g. unix:///tmp/php.sock;/status or tcp://127.0.0.1:9000/status")
@@ -139,11 +133,5 @@ func init() {
 		"PHP_FPM_FIX_PROCESS_COUNT":  "phpfpm.fix-process-count",
 	}
 
-	for env, flag := range envs {
-		flag := serverCmd.Flags().Lookup(flag)
-		flag.Usage = fmt.Sprintf("%v [env %v]", flag.Usage, env)
-		if value := os.Getenv(env); value != "" {
-			flag.Value.Set(value)
-		}
-	}
+	mapEnvVars(envs, serverCmd)
 }

cmd/version.go

@@ -31,14 +31,4 @@ var versionCmd = &cobra.Command{
 
 func init() {
 	RootCmd.AddCommand(versionCmd)
-
-	// Here you will define your flags and configuration settings.
-
-	// Cobra supports Persistent Flags which will work for this command
-	// and all subcommands, e.g.:
-	// versionCmd.PersistentFlags().String("foo", "", "A help for foo")
-
-	// Cobra supports local flags which will only run when this command
-	// is called directly, e.g.:
-	// versionCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
 }

main.go

@@ -15,6 +15,7 @@ package main
 
 import (
 	"fmt"
+
 	"github.com/hipages/php-fpm_exporter/cmd"
 )
 

phpfpm/exporter.go

@@ -11,12 +11,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// Package phpfpm provides convenient access to PHP-FPM pool data
 package phpfpm
 
 import (
+	"sync"
+
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/speps/go-hashids"
-	"sync"
 )
 
 const (

phpfpm/phpfpm.go

@@ -17,12 +17,13 @@ package phpfpm
 import (
 	"encoding/json"
 	"fmt"
-	"github.com/tomasen/fcgi_client"
 	"io/ioutil"
 	"net/url"
 	"strconv"
 	"sync"
 	"time"
+
+	"github.com/tomasen/fcgi_client"
 )
 
 // PoolProcessRequestIdle defines a process that is idle.