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Hi all, I'm having a strange issue with the bridge on my lxc host. First, some background info: I'm running lxc version 0.75 on a CentOS 6.3 install with the standard kernel (2.6.32-279.9.1.el6.i686). it's running inside a VirtualBox VM. I created 100 containers and named from 000 to 099. they are all with sequential assigned IPs and macaddresses (from 10.0.1.0/8 till 10.0.1.99/8 | 80:04:C0:AB:00:00 till 80:04:C0:AB:00:63). When starting them in "mass" with something like: for i in `range 0 99`; do echo $i; lxc-start -n $i -d; done after a random number of containers is started the br0 bridge just stops to answer for anything. It just freezes (it's easy to note because I'm connecting to the host through ssh using the same bridge). If I put a sleep 5 on the for above, things goes better, but then one or two of the containers became a "remote bridge bomb". The bridge stays working till a packet arrives to the "bomb" container, and them again the entire bridge freezes. This container bomb is also random. if I remove the problematic container iface from the bridge, it unfreezes. If I add it again and send a packet... It freezes again. If I stop the container and re-start it... all goes fine and the issue vanish. From my point of view, looks like when the virtual iface is created during the container start (if under load or with too much concurrent starts... I don't know), sometimes something goes wrong with the iface and it mess with the entire bridge if this "messy" iface is attached. Do any one have any input on this (do this happened before? Is there a limit for concurrent containers initializations? Is there a kernel setting or some config that I could do to solve it)? In order to achieve what I need in production environment, I will need to start and stop containers several times per minute. Do this sound too problematic? If you guys need any additional information, please just let me know. Thanks in advance -- Leon Waldman Senior Linux/UNIX SysAdmin & Consultant. Back-End & Infrastructure Architect.   |
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