1 files changed, 174 insertions, 0 deletions
diff --git a/go/swift-rpc-losf/main.go b/go/swift-rpc-losf/main.go
new file mode 100644
index 000000000..9bf6489d3
--- /dev/null
+++ b/go/swift-rpc-losf/main.go
@@ -0,0 +1,174 @@
+// Copyright (c) 2010-2012 OpenStack Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// KV store for LOFS
+package main
+
+import (
+	"flag"
+	"fmt"
+	"github.com/sirupsen/logrus"
+	"net/http"
+	_ "net/http/pprof"
+	"os"
+	"os/signal"
+	"path"
+	"syscall"
+	"time"
+)
+
+// Name of the base losf root directory, relative to the swift disk
+const rootDirBase = "losf"
+
+// Will run checks and create rootDir if needed
+// Returns the path to rootDir
+func diskSetup(diskPath string, policyIdx int, waitForMount bool) (string, error) {
+
+	if waitForMount {
+		log.Debugf("waitForMount is set, if %s is not mounted, will wait until it is", diskPath)
+	}
+	for waitForMount {
+		nowMounted, err := isMounted(diskPath)
+		if err != nil {
+			return "", err
+		}
+		if nowMounted {
+			break
+		}
+		time.Sleep(time.Second / 10)
+	}
+
+	// OVH patch to match a similar mechanism in the python code.
+	// If a ".offline" file exists in srv node, do not start (/srv/node/disk-XX.offline)
+	offlineFile := fmt.Sprintf("%s%s", diskPath, ".offline")
+	offlineFileExists := false
+	if _, err := os.Stat(offlineFile); err == nil {
+		offlineFileExists = true
+		log.Debugf("offline file exists: %s", offlineFile)
+	}
+	for offlineFileExists {
+		if _, err := os.Stat(offlineFile); os.IsNotExist(err) {
+			offlineFileExists = false
+		}
+		time.Sleep(time.Second * 10)
+	}
+
+	rootDir := path.Join(diskPath, getBaseDirName(rootDirBase, policyIdx))
+	log.Debug(rootDir)
+
+	rootDirExists, err := dirExists(rootDir)
+	if err != nil {
+		return "", err
+	}
+	if !rootDirExists {
+		err := os.Mkdir(rootDir, os.FileMode(0700))
+		if err != nil {
+			return "", err
+		}
+	}
+	return rootDir, nil
+}
+
+// Parse options and starts the rpc server.
+func main() {
+	var dbDir, socketPath string
+	var kv KV
+
+	setupLogging()
+
+	debugLevels := map[string]logrus.Level{
+		"panic": logrus.PanicLevel,
+		"fatal": logrus.FatalLevel,
+		"error": logrus.ErrorLevel,
+		"warn":  logrus.WarnLevel,
+		"info":  logrus.InfoLevel,
+		"debug": logrus.DebugLevel,
+	}
+
+	var diskPath = flag.String("diskPath", "", "Swift disk path (/srv/node/disk-xyz)")
+	var policyIdx = flag.Int("policyIdx", 0, "Policy index")
+	var waitForMount = flag.Bool("waitForMount", true, "Wait for diskPath to be mounted. If diskPath exists but is not a mount, it will wait")
+	var profilerAddr = flag.String("profilerAddr", "", "Start profiler and make it available at this address (127.0.0.1:8081)")
+	var debugLevel = flag.String("debug", "info", "Debug level (error, warn, info, debug)")
+	var allowRoot = flag.Bool("allowRoot", false, "Allow process to run as root")
+	var useGoLevelDB = flag.Bool("useGoLevelDB", false, "Use native golang levelDB package")
+
+	flag.Parse()
+
+	log.SetLevel(debugLevels[*debugLevel])
+
+	if !*allowRoot && os.Getuid() == 0 {
+		log.Fatal("running as root, and allowRoot is false")
+	}
+
+	if *diskPath == "" {
+		log.Fatal("diskPath not specified")
+	}
+
+	rootDir, err := diskSetup(*diskPath, *policyIdx, *waitForMount)
+	if err != nil {
+		panic(err)
+	}
+
+	dbDir = path.Join(rootDir, "db")
+	socketPath = path.Join(rootDir, "rpc.socket")
+	rlog := log.WithFields(logrus.Fields{"socket": socketPath})
+
+	// install signal handler
+	stopChan := make(chan os.Signal, 1)
+	signal.Notify(stopChan, os.Interrupt, syscall.SIGTERM)
+
+	// start http server for profiling
+	if *profilerAddr != "" {
+		go func() {
+			rlog.Debug(http.ListenAndServe(*profilerAddr, nil))
+		}()
+	}
+
+	// Acquire lock to protect socket
+	rlog.Debug("Locking socket")
+	err = lockSocket(socketPath)
+	if err != nil {
+		rlog.Fatalf("Failed to lock RPC socket: %s", err)
+	}
+	os.Remove(socketPath)
+
+	// Open the database
+	if *useGoLevelDB {
+		kv, err = openGoLevelDb(dbDir)
+	} else {
+		kv, err = openLevigoDB(dbDir)
+	}
+
+	if err != nil {
+		rlog.Fatal(err)
+	}
+
+	// Check the kv was stopped properly
+	isClean, err := setKvState(kv)
+	if err != nil {
+		rlog.Fatal(err)
+	}
+	log.Infof("kv is clean: %v", isClean)
+
+	// Start the RPC server
+	rlog.Info("Starting RPC server")
+	err = runServer(kv, *diskPath, socketPath, stopChan, isClean)
+	if err != nil {
+		rlog.Fatal(err)
+	}
+
+	return
+}