how to force service starts after network is ready in Ubuntu 10.04?

I'm setting up a nginx proxy server in the network, in the nginx conf file it looks for upstream servers through hostnames; the server uses dhcp 开发者_运维知识库interface.

every time reboot, nginx always fail to start, i ran into init 1 then invoke init 3, i can see that nginx fail because it can't find upstream servers, as network is not ready. when the interface is ready ,i start nginx /etc/init.d/nginx start , all works just fine.

I used debian before, debian starts networking during boot, won't continue booting until network is ready or timeout(dhcp), there won't be such problems.

I wonder how to make ubuntu works the debian way, make the networking ready before other server starts.

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I fixed a similar problem by putting a simple script in /etc/network/if-up.d/.

Try putting this script:

#!/bin/sh
/etc/init.d/nginx restart

give it a name you like and make the script executable. It should be executed each time network is ready.