如何更新init脚本

Question

更新init脚本( ubuntu系统)的正确方法是什么？

我正在尝试将我的gitlab版本从6-0升级到6-1，升级的一部分包括替换init脚本。

升级说明-步骤6

sudo rm /etc/init.d/gitlab
sudo curl --output /etc/init.d/gitlab https://raw.github.com/gitlabhq/gitlabhq/6-1-stable/lib/support/init.d/gitlab
sudo chmod +x /etc/init.d/gitlab

我发现在更新init脚本之后，调用脚本什么也不做。通常，它会打印出gitlab服务的进程id。

root@gitlab:/etc/init.d# /etc/init.d/gitlab status
root@gitlab:/etc/init.d# (notice how nothing happens)

#No gitlab process is running
root@gitlab:/etc/init.d# ps aux |grep gitlab
root      4519  0.0  0.1   9384   928 pts/0    R+   20:03   0:00 grep --color=auto gitlab

我已经采取了

步骤来排除这个问题：

确保它是可执行的

root@gitlab:/etc/init.d# ll gitlab
-rwxr-xr-x 1 root root 7195 Sep 28 19:29 gitlab*

Strace脚本

    root@gitlab:/etc/init.d# strace ./gitlab
execve("./gitlab", ["./gitlab"], [/* 16 vars */]) = 0
brk(0)                                  = 0xb29000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd33a1a8000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=22291, ...}) = 0
mmap(NULL, 22291, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7fd33a1a2000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\30\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1811128, ...}) = 0
mmap(NULL, 3925208, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7fd339bc9000
mprotect(0x7fd339d7e000, 2093056, PROT_NONE) = 0
mmap(0x7fd339f7d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b4000) = 0x7fd339f7d000
mmap(0x7fd339f83000, 17624, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7fd339f83000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd33a1a1000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd33a1a0000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd33a19f000
arch_prctl(ARCH_SET_FS, 0x7fd33a1a0700) = 0
mprotect(0x7fd339f7d000, 16384, PROT_READ) = 0
mprotect(0x619000, 4096, PROT_READ)     = 0
mprotect(0x7fd33a1aa000, 4096, PROT_READ) = 0
munmap(0x7fd33a1a2000, 22291)           = 0
getpid()                                = 4459
rt_sigaction(SIGCHLD, {0x40f100, ~[RTMIN RT_1], SA_RESTORER, 0x7fd339bff4a0}, NULL, 8) = 0
geteuid()                               = 0
brk(0)                                  = 0xb29000
brk(0xb4a000)                           = 0xb4a000
getppid()                               = 4458
stat("/etc/init.d", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("./gitlab", O_RDONLY)              = 3
fcntl(3, F_DUPFD, 10)                   = 10
close(3)                                = 0
fcntl(10, F_SETFD, FD_CLOEXEC)          = 0
rt_sigaction(SIGINT, NULL, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGINT, {0x40f100, ~[RTMIN RT_1], SA_RESTORER, 0x7fd339bff4a0}, NULL, 8) = 0
rt_sigaction(SIGQUIT, NULL, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGQUIT, {SIG_DFL, ~[RTMIN RT_1], SA_RESTORER, 0x7fd339bff4a0}, NULL, 8) = 0
rt_sigaction(SIGTERM, NULL, {SIG_DFL, [], 0}, 8) = 0
rt_sigaction(SIGTERM, {SIG_DFL, ~[RTMIN RT_1], SA_RESTORER, 0x7fd339bff4a0}, NULL, 8) = 0
read(10, "#! /bin/sh\n\n# GITLAB\n# Maintaine"..., 8192) = 7195
stat("/usr/local/sbin/sudo", 0x7fffcbf518d0) = -1 ENOENT (No such file or directory)
stat("/usr/local/bin/sudo", 0x7fffcbf518d0) = -1 ENOENT (No such file or directory)
stat("/usr/sbin/sudo", 0x7fffcbf518d0)  = -1 ENOENT (No such file or directory)
stat("/usr/bin/sudo", {st_mode=S_IFREG|S_ISUID|0755, st_size=71288, ...}) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fd33a1a09d0) = 4460
wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 1}], 0, NULL) = 4460
--- SIGCHLD (Child exited) @ 0 (0) ---
rt_sigreturn(0x11)                      = 4460
exit_group(1)                           = ?

我比Ubuntu更熟悉update，并且在手动执行upd-rc.d时，我听到了各种不同的意见。不管怎么说，我都试过了对本博客的建议

root@gitlab:/etc/init.d# sudo update-rc.d -f gitlab remove
 Removing any system startup links for /etc/init.d/gitlab ...
   /etc/rc0.d/K20gitlab
   /etc/rc1.d/K20gitlab
   /etc/rc2.d/S20gitlab
   /etc/rc3.d/S20gitlab
   /etc/rc4.d/S20gitlab
   /etc/rc5.d/S20gitlab
   /etc/rc6.d/K20gitlab
root@gitlab:/etc/init.d# update-rc.d gitlab defaults
 Adding system startup for /etc/init.d/gitlab ...
   /etc/rc0.d/K20gitlab -> ../init.d/gitlab
   /etc/rc1.d/K20gitlab -> ../init.d/gitlab
   /etc/rc6.d/K20gitlab -> ../init.d/gitlab
   /etc/rc2.d/S20gitlab -> ../init.d/gitlab
   /etc/rc3.d/S20gitlab -> ../init.d/gitlab
   /etc/rc4.d/S20gitlab -> ../init.d/gitlab
   /etc/rc5.d/S20gitlab -> ../init.d/gitlab

没有运气，剧本还是不运行。

要升级init脚本，还需要在ubuntu系统上做些什么吗？

Update1:

查看/var/log/auth.log显示：

vagrant@gitlab:~$ sudo su -
root@gitlab:~# /etc/init.d/gitlab status
root@gitlab:~# tail /var/log/auth.log
Sep 28 20:52:31 gitlab su[2205]: pam_unix(su:session): session closed for user root
Sep 28 20:52:31 gitlab sudo: pam_unix(sudo:session): session closed for user root
Sep 28 20:52:34 gitlab sudo:  vagrant : TTY=pts/0 ; PWD=/home/vagrant ; USER=root ; COMMAND=/bin/su -
Sep 28 20:52:34 gitlab sudo: pam_unix(sudo:session): session opened for user root by vagrant(uid=1000)
Sep 28 20:52:34 gitlab su[2311]: Successful su for root by root
Sep 28 20:52:34 gitlab su[2311]: + /dev/pts/0 root:root
Sep 28 20:52:34 gitlab su[2311]: pam_unix(su:session): session opened for user root by vagrant(uid=0)
Sep 28 20:52:43 gitlab sudo:     root : TTY=pts/0 ; PWD=/root ; USER=git ; COMMAND=/bin/false -c /etc/init.d/gitlab status
Sep 28 20:52:43 gitlab sudo: pam_unix(sudo:session): session opened for user git by vagrant(uid=0)
Sep 28 20:52:43 gitlab sudo: pam_unix(sudo:session): session closed for user git

Update2

我在6-0-稳定和6-1稳定之间做了不同的init脚本。这似乎是一次几乎完全的重写。

差别在这里：

https://gist.github.com/spudstud/6747146#file-diff-gitlab-init-scripts

您可以在这里看到实际的6-0脚本：

https://github.com/gitlabhq/gitlabhq/blob/6-0-stable/lib/support/init.d/gitlab

这里的6-1剧本是：

https://github.com/gitlabhq/gitlabhq/blob/6-1-stable/lib/support/init.d/gitlab

Update3

尝试使用bash -x启动脚本

root@gitlab:/etc/init.d# bash -x /etc/init.d/gitlab start
+ RAILS_ENV=production
+ app_root=/home/git/gitlab
+ app_user=git
+ unicorn_conf=/home/git/gitlab/config/unicorn.rb
+ pid_path=/home/git/gitlab/tmp/pids
+ socket_path=/home/git/gitlab/tmp/sockets
+ web_server_pid_path=/home/git/gitlab/tmp/pids/unicorn.pid
+ sidekiq_pid_path=/home/git/gitlab/tmp/pids/sidekiq.pid
+ '[' root '!=' git ']'
+ sudo -u git -H -i /etc/init.d/gitlab start
+ exit

成功，

看来，脚本必须以用户“git”的身份运行。

Answer 1

要调试bash或shell脚本，要么使用bash -x运行它，要么编辑脚本并添加一行set -x。这将显示脚本中每一行在执行时的执行跟踪以及变量赋值。

Answer 2

我发现了不需要更改init脚本的问题解决方案。

gitlab的说明指示用户使用adduser --disabled-login。我没有使用adduser，而是使用木偶来添加用户，并将默认的shell设置为/bin/false，而不是/bin/bash。

当我将'git‘用户的shell更改为/bin/bash时，init脚本再次正常工作。