Initial commit

2017-09-07 13:39:11 +01:00
commit ec68367227
735 changed files with 248651 additions and 0 deletions
--- a/cmd/runmqserver/mqconfig.go
+++ b/cmd/runmqserver/mqconfig.go
@@ -0,0 +1,135 @@
+/*
+© Copyright IBM Corporation 2017
+
+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.
+*/
+package main
+
+import (
+	"io/ioutil"
+	"log"
+	"runtime"
+	"strings"
+
+	"golang.org/x/sys/unix"
+)
+
+// fsTypes contains file system identifier codes.
+// This code will not compile on some operating systems - Linux only.
+var fsTypes = map[int64]string{
+	0x61756673: "aufs",
+	0xef53:     "ext",
+	0x6969:     "nfs",
+	0x65735546: "fuse",
+	0x9123683e: "btrfs",
+	0x01021994: "tmpfs",
+	0x794c7630: "overlayfs",
+}
+
+func logBaseImage() error {
+	buf, err := ioutil.ReadFile("/etc/os-release")
+	if err != nil {
+		return err
+	}
+	lines := strings.Split(string(buf), "\n")
+	for _, l := range lines {
+		if strings.HasPrefix(l, "PRETTY_NAME=") {
+			words := strings.Split(l, "\"")
+			if len(words) >= 2 {
+				log.Printf("Base image detected: %v", words[1])
+				return nil
+			}
+		}
+	}
+	return nil
+}
+
+func readProc(filename string) (value string, err error) {
+	buf, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSpace(string(buf)), nil
+}
+
+func readMounts() error {
+	all, err := readProc("/proc/mounts")
+	if err != nil {
+		log.Println("Error: Couldn't read /proc/mounts")
+		return err
+	}
+	lines := strings.Split(all, "\n")
+	detected := false
+	for i := range lines {
+		parts := strings.Split(lines[i], " ")
+		//dev := parts[0]
+		mountPoint := parts[1]
+		fsType := parts[2]
+		if strings.Contains(mountPoint, "/mnt") {
+			log.Printf("Detected '%v' volume mounted to %v", fsType, mountPoint)
+			detected = true
+		}
+	}
+	if !detected {
+		log.Println("No volume detected. Persistent messages may be lost")
+	} else {
+		checkFS("/mnt/mqm")
+	}
+	return nil
+}
+
+func checkFS(path string) {
+	statfs := &unix.Statfs_t{}
+	err := unix.Statfs(path, statfs)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	t := fsTypes[statfs.Type]
+	switch t {
+	case "aufs", "overlayfs", "tmpfs":
+		log.Fatalf("Error: %v uses unsupported filesystem type %v", path, t)
+	default:
+		log.Printf("Detected %v has filesystem type '%v'", path, t)
+	}
+}
+
+func logConfig() {
+	log.Printf("CPU architecture: %v", runtime.GOARCH)
+	// TODO: You can't use os.user if you're cross-compiling
+	// u, err := user.Current()
+	// if err != nil {
+	// 	log.Println(err)
+	// } else {
+	// 	log.Printf("Running as user ID %v (%v) with primary group %v", u.Uid, u.Name, u.Gid)
+	// }
+	if runtime.GOOS == "linux" {
+		var err error
+		osr, err := readProc("/proc/sys/kernel/osrelease")
+		if err != nil {
+			log.Println(err)
+		} else {
+			log.Printf("Linux kernel version: %v", osr)
+		}
+		logBaseImage()
+		fileMax, err := readProc("/proc/sys/fs/file-max")
+		if err != nil {
+			log.Println(err)
+		} else {
+			log.Printf("Maximum file handles: %v", fileMax)
+		}
+		readMounts()
+	} else {
+		log.Fatalf("Unsupported platform: %v", runtime.GOOS)
+	}
+}