问题
So I'm trying to write some init.d scripts satisfying LSB so they run appropriately at startup and shutdown. Unfortunately, I'm having issues with LSB/update-rc.d to satisfy dependencies.
# Required-Start: $network $local_fs hadoop-namenode hadoop-datanode zookeeper-server
# Required-Stop: $network $local_fs hadoop-namenode hadoop-datanode zookeeper-server
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
however, when I run update-rc.d defaults, it merely generates the defaults involved, with the exact same start time as the already dependencies, which breaks things horribly. Am I missing something with update-rc.d or LSB to get this configured?
In case it's relevant, this is Ubuntu 12.04
回答1:
To make your script run later in the boot sequence, just add a sequence number, like 98 in the following command. Then most dependencies will be satisfied.
Once, I had to use a boot script which depended on other boot scripts. This brought a lot troubles. In the end I used this command to solve the problem:
cd /etc/init.d
sudo update-rc.d my_script defaults 98
The 98 means my_script gets sequence number 98 at boot, it looks like it's range from 1 to 99, and most other boot scripts have smaller numbers, this ensures my script has all its dependencies ready.
BTW, to remove the old script, this can be used:
sudo update-rc.d -f my_old_script remove
# -f means 'force'
Hope this helps.
回答2:
This approach doesn't work anymore on some systems (Debian Squeeze for example). The number is just ignored with no explanation. The preferred method is this: http://refspecs.linuxbase.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-generic/initscrcomconv.html
Look at "Required-Start:" script declaration.
来源：https://stackoverflow.com/questions/12080294/update-rc-d-and-init-d-dependencies