Ubuntu 14.04上的upstart或bash脚本是否有变化？ （尝试用upstart启动sidekiq）

Question

我对bash脚本编写起来相当新，但我觉得我真的错过了一些基本的东西。我试图在Ubuntu 14.04机器上尝试几乎没有修改过的Mike Perham's upstart sidekiq script版本，但几乎没有按预期评估任何内容：

• 导出似乎无法正常工作
• source似乎没有在.bashrc中评估我更改的PATH变量或运行rbenv init命令
• cd似乎没有更改目录，除非$（pwd）命令不是评估它的正确方法

这是我修改后的脚本：

# /etc/init/sidekiq.conf - Sidekiq config

# This example config should work with Ubuntu 12.04+.  It
# allows you to manage multiple Sidekiq instances with
# Upstart, Ubuntu's native service management tool.

# change to match your deployment user
setuid deploy
setgid deploy

stop on (stopping workers or runlevel [06])

respawn
respawn limit 3 30

instance $index

script
# this script runs in /bin/sh by default
# respawn as bash so we can source in rbenv
exec /bin/bash <<EOT
  # use syslog for logging
  # exec &> /dev/kmsg

  # pull in system rbenv
  export HOME=/home/deploy
  echo "home is $HOME"
  source /home/deploy/.bashrc
  echo "path is $PATH"

  cd /home/deploy/domain_freek/current
  echo "user is $(whoami) and pwd is $(pwd) and rbenv is located at $(which rbenv)"
  exec bundle exec sidekiq -i ${index} -e production
EOT
end script

这是我在upstart日志文件中得到的输出：

home is
path is /usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin
user is deploy and pwd is / and rbenv is located at 
/bin/bash: line 12: exec: bundle: not found

Answer 1

2变化完全不同：

1）在exec /bin/bash << 'EOT'中向EOT添加硬报价（相信Mat，谢谢！）

2）不使用source加载.bashrc，而是将.bashrc中的rbenv行直接添加到upstart脚本中。将source /home/deploy/.bashrc替换为：

export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"
export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"

我不知道为什么这两个变化有所不同，如果这与ubuntu，upstart或bash的新版本相关。如果有人可以解释，请加入。

我已经为所有寻找答案的人提供了完整的工作脚本：

# /etc/init/sidekiq.conf - Sidekiq config

# This example config should work with Ubuntu 12.04+.  It
# allows you to manage multiple Sidekiq instances with
# Upstart, Ubuntu's native service management tool.
#
# See workers.conf for how to manage all Sidekiq instances at once.
#
# Save this config as /etc/init/sidekiq.conf then mange sidekiq with:
#   sudo start sidekiq index=0
#   sudo stop sidekiq index=0
#   sudo status sidekiq index=0
#
# or use the service command:
#   sudo service sidekiq {start,stop,restart,status}
#

description "Sidekiq Background Worker"

# no "start on", we don't want to automatically start
stop on (stopping workers or runlevel [06])

# change to match your deployment user
setuid deploy
setgid deploy

respawn
respawn limit 3 30

# TERM is sent by sidekiqctl when stopping sidekiq.  Without declaring these as normal exit codes, it just respawns.
normal exit 0 TERM

instance $index

script
# this script runs in /bin/sh by default
# respawn as bash so we can source in rbenv
exec /bin/bash << 'EOT'
  # use syslog for logging
  # exec &> /dev/kmsg

  # pull in system rbenv
  export HOME=/home/deploy
  echo "$HOME"
  #source /home/deploy/.bashrc
  export PATH="$HOME/.rbenv/bin:$PATH"
  eval "$(rbenv init -)"
  export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"
  echo "$PATH"

  cd /home/deploy/domain_freek/current
  echo "user is $(whoami) and pwd is $(pwd) and rbenv is located at $(which rbenv)"  
  exec bundle exec sidekiq -i ${index} -e production
EOT
end script

Answer 2

如果shell以非交互模式运行，Ubuntu 14.04上的默认.bashrc文件会立即返回几行。当您从bashrc中删除这些行时，source将在upstart中按预期工作。

〜/ .bashrc （要删除的行）

# If not running interactively, don't do anything
case $- in
    *i*) ;;
      *) return;;
esac

Answer 3

Josh的解决方案在使用rbenv的ubuntu 14.04上对我不起作用。然而，这确实有效：

exec /bin/bash <<EOF
  export RBENV_ROOT=/home/ubuntu/.rbenv
  export RBENV_VERSION=2.2.2
  cd /var/www/app/current
  exec /home/ubuntu/.rbenv/bin/rbenv exec bundle exec sidekiq -i ${index} -e production
EOF