Q: I have an openvz container that is NOT stopping with the standard vz tools. How can I kill it? I tried a VZ destory but that wont work.
A: It's a little harsh, but the best way I've found to stop a stubborn container is to forcefully kill the container's processes. Command vzpid with grep makes it easy to find:
ps ax | awk '{print $1}' | xargs vzpid | grep <container ID> | awk '{print $1}' | xargs kill -9
https://serverfault.com/questions/318711/stop-an-unstoppable-openvz-container