lalyos/hack-docker-hosts.sh

## readme.md

      
    Raw
  

              readme.md
            
          
    Right now when you start a docker instance, you can change the /etc/hosts file. Previously i was workarounding this limitation with dnsmasq, but it seems to havyweight.
I found an alternate solution on stackowerflow which simply hacks libnss_files.so, by replaces all /etc/hosts reference with /tmp/hosts, then puts the hacked library to LD_LIBRARY_PATH
hack

Here is the sligthly modified version for centos:
cp /etc/hosts /tmp/hosts
#vi /tmp/hosts
mkdir -p -- /lib-override && cp /lib64/libnss_files.so.2 /lib-override

sed -i.bak 's:/etc/hosts:/tmp/hosts:g' /lib-override/libnss_files.so.2
export LD_LIBRARY_PATH=/lib-override

  
## hack-docker-hosts.sh
cp /etc/hosts /tmp/hosts
#vi /tmp/hosts
mkdir -p -- /lib-override && cp /lib64/libnss_files.so.2 /lib-override

sed -i.bak 's:/etc/hosts:/tmp/hosts:g' /lib-override/libnss_files.so.2
export LD_LIBRARY_PATH=/lib-override
	cp /etc/hosts /tmp/hosts
	#vi /tmp/hosts
	mkdir -p -- /lib-override && cp /lib64/libnss_files.so.2 /lib-override

	sed -i.bak 's:/etc/hosts:/tmp/hosts:g' /lib-override/libnss_files.so.2
	export LD_LIBRARY_PATH=/lib-override