Put subcommand in dedicated files.

cmd/traefik/healthcheck.go

@@ -0,0 +1,64 @@
+package main
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/containous/flaeg"
+	"github.com/containous/traefik/configuration"
+)
+
+func newHealthCheckCmd(traefikConfiguration *TraefikConfiguration, traefikPointersConfiguration *TraefikConfiguration) *flaeg.Command {
+	return &flaeg.Command{
+		Name:                  "healthcheck",
+		Description:           `Calls traefik /ping to check health (web provider must be enabled)`,
+		Config:                traefikConfiguration,
+		DefaultPointersConfig: traefikPointersConfiguration,
+		Run: runHealthCheck(traefikConfiguration),
+		Metadata: map[string]string{
+			"parseAllSources": "true",
+		},
+	}
+}
+
+func runHealthCheck(traefikConfiguration *TraefikConfiguration) func() error {
+	return func() error {
+		traefikConfiguration.GlobalConfiguration.SetEffectiveConfiguration(traefikConfiguration.ConfigFile)
+
+		if traefikConfiguration.Ping == nil {
+			fmt.Println("Please enable `ping` to use healtcheck.")
+			os.Exit(1)
+		}
+
+		pingEntryPoint, ok := traefikConfiguration.EntryPoints[traefikConfiguration.Ping.EntryPoint]
+		if !ok {
+			pingEntryPoint = &configuration.EntryPoint{Address: ":8080"}
+		}
+
+		client := &http.Client{Timeout: 5 * time.Second}
+		protocol := "http"
+		if pingEntryPoint.TLS != nil {
+			protocol = "https"
+			tr := &http.Transport{
+				TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+			}
+			client.Transport = tr
+		}
+
+		resp, errPing := client.Head(protocol + "://" + pingEntryPoint.Address + traefikConfiguration.Web.Path + "ping")
+		if errPing != nil {
+			fmt.Printf("Error calling healthcheck: %s\n", errPing)
+			os.Exit(1)
+		}
+		if resp.StatusCode != http.StatusOK {
+			fmt.Printf("Bad healthcheck status: %s\n", resp.Status)
+			os.Exit(1)
+		}
+		fmt.Printf("OK: %s\n", resp.Request.URL)
+		os.Exit(0)
+		return nil
+	}
+}