ubuntu: start (upstart) second instance of mongodb

Question

the standard upstart script that comes with mongodb works fine:

# Ubuntu upstart file at /etc/init/mongodb.conf

limit nofile 20000 20000

kill timeout 300 # wait 300s between SIGTERM and SIGKILL.

pre-start script
    mkdir -p /var/lib/mongodb/
    mkdir -p /var/log/mongodb/
end script

start on runlevel [2345]
stop on runlevel [06]

script
  ENABLE_MONGODB="yes"
  if [ -f /etc/default/mongodb ]; then . /etc/default/mongodb; fi
  if [ "x$ENABLE_MONGODB" = "xyes" ]; then exec start-stop-daemon --start --quiet --chuid mongodb --exec  /usr/bin/mongod -- --config /etc/mongodb.conf; fi
end script

if i want to run a second instance of mongod i thought i just copy both /etc/mongodb.conf -> /etc/mongodb2.conf and /etc/init/mongodb.conf -> /etc/init/mongodb2.conf and change the std port in the first conf-file. then adjust the script above to start with the newly created /etc/mongodb2.conf.

i can then just say start mongodb2and the service starts ... but it is killed right after starting. what do i change, to get both processes up and running?

 # Ubuntu upstart file at /etc/init/mongodb2.conf

limit nofile 20000 20000

kill timeout 300 # wait 300s between SIGTERM and SIGKILL.

pre-start script
    mkdir -p /var/lib/mongodb2/
    mkdir -p /var/log/mongodb2/
end script

start on runlevel [2345]
stop on runlevel [06]

script
  ENABLE_MONGODB="yes"
  if [ -f /etc/default/mongodb ]; then . /etc/default/mongodb; fi
  if [ "x$ENABLE_MONGODB" = "xyes" ]; then exec start-stop-daemon --start --quiet --chuid mongodb --exec  /usr/bin/mongod -- --config /etc/mongodb2.conf; fi
end script

Answer 1

i couldn't get the "standard" upstart script to work (as described above), so i changed it like this:

# Ubuntu upstart file at /etc/init/mongodb.conf

limit nofile 20000 20000

kill timeout 300 # wait 300s between SIGTERM and SIGKILL.

pre-start script
    mkdir -p /var/lib/mongodb/
    mkdir -p /var/log/mongodb/
end script

start on runlevel [2345]
stop on runlevel [06]

script

  exec sudo -u mongodb /usr/bin/mongod --config /etc/mongodb.conf

end script

and if you want to run other instances of mongodb just copy the *.conf files and make the changes to /etc/mongodb2.conf and /etc/init/mongodb2.conf

# Ubuntu upstart file at /etc/init/mongodb2.conf

limit nofile 20000 20000

kill timeout 300 # wait 300s between SIGTERM and SIGKILL.

pre-start script
    mkdir -p /var/lib/mongodb2/
    mkdir -p /var/log/mongodb2/
end script

start on runlevel [2345]
stop on runlevel [06]

script

  exec sudo -u mongodb /usr/bin/mongod --config /etc/mongodb2.conf

end script

i think the only thing that is not working is restart mongodb - you have to stop and then start again ...