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main.go
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main.go
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package main
import (
"flag"
"fmt"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
"syscall"
"./container"
)
var (
srcDir = flag.String("src", "/data/fluentd", "log base directory on the host")
dstDir = flag.String("dstDir", "/tmp", "destination directory on the host")
rootFS = flag.String("rootfs", "/data/alpine", "rootfs on the host( eg. alpine rootfs )")
GitlabAccessToken = flag.String("gitlabtoken", "", "gitlab access token")
GitlabEndpoint = flag.String("gitlaburl", "http://g.haodai.net", "gitlab base url")
runChild = flag.Bool("child", false, "run container")
token = flag.String("token", "", "gitlab user token")
// user = flag.String("user", "", "gitlab user info")
// childgit = flag.String("childgit", "", "gitlab git(org/repo) for container")
// childuserid = flag.Int("childuserid", 0, "gitlab userid for container")
listenPort = flag.Int("p", 0, "local port number")
// dialAddr = flag.String("dial", "", "dailing address for test listening (eg. localhost:8081)")
)
var Usage = func() {
fmt.Printf("Usage of %v:\n", os.Args[0])
flag.PrintDefaults()
fmt.Println(`Environments:
GOTTY_USERTOKEN -- user token for gitlab access
`)
}
func parseArgs(args []string) (git, user, token string) {
token = os.Getenv("GOTTY_USERTOKEN")
if token == "" {
fmt.Printf("error, no token found")
os.Exit(1)
}
for _, v := range args[1:] {
arg := strings.Split(v, "=")
if len(arg) < 2 {
continue
}
// if arg[0] == "token" {
// // fmt.Println("got user ", arg[1])
// s := strings.Split(v, "token=")
// if len(s) != 2 {
// log.Printf("parse token err expect prefix: token= ")
// continue
// }
// token = s[1]
// }
if arg[0] == "user" {
// fmt.Println("got user ", arg[1])
s := strings.Split(v, "user=")
if len(s) != 2 {
log.Printf("parse user err expect prefix: user= ")
continue
}
user = s[1]
}
if arg[0] == "git" {
// fmt.Println("got user ", arg[1])
s := strings.Split(v, "git=")
if len(s) != 2 {
log.Printf("parse user err expect prefix: git= ")
continue
}
git = s[1]
}
continue
}
return
}
// the container can't be run directly, there need an parent
func run() error {
// args := append([]string{"-child"}, "-childorg="+org, "-childrepo="+repo, "-childenv="+env)
args := []string{"-child"}
args = append(args, os.Args[1:]...)
cmd := exec.Command("/proc/self/exe", args...)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.SysProcAttr = &syscall.SysProcAttr{
Cloneflags: syscall.CLONE_NEWUTS | syscall.CLONE_NEWPID | syscall.CLONE_NEWNS,
Unshareflags: syscall.CLONE_NEWNS,
// Credential: &syscall.Credential{Uid: 65534, Gid: 65534}, //set at child level
}
// fmt.Println("start the child")
return cmd.Run()
//dst := filepath.Join(*dstDir, org, repo)
// _, err := container.UnMount(dst)
// if err != nil {
// fmt.Println("umount err", err)
// }
//log.Println("exit")
}
// link doesn't mount files, can't set workDir
// workDir can set in the log file structure only
func child(org, repo string, envs []string) error {
//Listen()
// l := filepath.Join(*srcDir, org, repo)
// t := filepath.Join("/tmp/", org, repo)
// src := filepath.Join("/tmp/", org)
// CreateLink(l, t)
dst := filepath.Join(*dstDir, org, repo)
src := filepath.Join(*srcDir, org, repo)
// err := os.MkdirAll(filepath.Join(dst, "logs/online"), 0755)
// if err != nil {
// fmt.Println("make err", err)
// }
// _, err = os.Stat(filepath.Join(dst, "logs/online"))
// if err != nil {
// return fmt.Errorf("dst %v does not exist", dst)
// }
// fmt.Println("create ok", filepath.Join(dst, "logs/online"))
okenvs, binds, err := getBinds(src, dst, envs)
if err != nil {
return err
}
fmt.Println("exist envs: ", okenvs)
for _, v := range okenvs {
os.MkdirAll(filepath.Join(dst, "logs", v), 0755)
}
c := &container.Container{
Arg: []string{"sh"},
// Src: filepath.Join(dst, env),
Rootfs: *rootFS,
Dst: dst,
// BindDst: filepath.Join(dst, "logs"),
CGroupName: repo,
Hostname: repo,
WorkDir: filepath.Join("/logs"),
Binds: binds,
}
return c.Run()
// if err != nil {
// log.Println("run err", err)
// return err
// }
// return nil
//log.Println("exit")
// RemoveLink(t)
}
func main() {
flag.Usage = Usage
flag.Parse()
if *GitlabAccessToken == "" {
fmt.Println("token not set, exit")
return
}
// if *dialAddr != "" {
// Dial(*dialAddr)
// os.Exit(0)
// }
// if len(os.Args) <= 1 {
// fmt.Println("error: no git provided")
// os.Exit(1)
// }
if *runChild {
git, user, token := parseArgs(os.Args)
if token == "" {
fmt.Println("token arg not provided")
return
}
fmt.Printf("Hi %v\n", strings.TrimSpace(user))
if git == "" {
//fmt.Printf("\ntry append gitlab info for quicker access:\n")
fmt.Printf("\n想快点? 添加Gitlab项目信息直接进入:\n")
fmt.Printf("示例: http://logs.devops.haodai.net:8001/?git=flow_center/df-openapi\n\n")
cancelprint := printprogress()
gitlist, err := GetProjectLists(token, *srcDir)
cancelprint()
if err != nil {
fmt.Printf("get project lists err: %v\n", err)
return
}
git, err = GetProjectFromInput(gitlist, *srcDir)
if err != nil {
fmt.Println("get project err: ", err)
os.Exit(1)
}
}
// check user's permission.
envs, err := CheckPerm(git, token)
if err != nil {
fmt.Printf("check permission err: %v\n", err)
return
}
k8sgit := strings.Replace(git, "_", "-", -1)
var org, repo string
giturl := strings.Split(k8sgit, "/")
if len(giturl) != 2 {
fmt.Printf("git %v format err, expect lens 2, got %v\n", git, len(giturl))
return
}
org = giturl[0]
repo = giturl[1]
fmt.Printf("\n=== Welcome ===\n")
fmt.Printf("logbase: %v, permit envs: %v\n", k8sgit, strings.Join(envs, ","))
child(org, repo, envs)
return
}
err := run()
if err != nil {
fmt.Printf("run err: %v\n", err)
return
}
fmt.Println("exited")
fmt.Printf("\nTry refresh the page to enter again.\n")
}