Hi, On Thu, Jul 21, 2011 at 06:02:09PM +0100, Gordon Henderson wrote:
> A few months ago there were some posts about running containers in a > diskless host - just looking for some more info about this in my ponderous > ponderings! > > I'm not after having a diskless host (although it's an option), but to > have a host NFS mount a filesystem of a container, then start it.... > > ie. big NFS servery type thing. Many front-end hosts with lots of RAM, but > minimal disks. Container image NFS (or ?) mounted off server. Lets assume > 2 LAN interfaces on the fronting server - a private one to the filestore > and a public one to the rest of the world... (although that's not critical > for what I'm thinking of) > > That would then make management of the images utterly trivial and give the > ability to migrate them from one physical host to another with nothing > more than a shutdown/de-config on one host, and a config/startup on a new > host... > > However, assuming LXC is happy with it, there's the issue of running > services on an NFS server - but that's really not something for here - I'm > just interested in the scenario of server + multiple hosts... mounting > images via NFS. I can't think why it might not work... Obviously there > might be performance issues, but lets assume the environment is mostly > read access of a typical LAMP type server (with the M part on another > separate server using standard MySQL network access to it, rather than > local access to the (NFS) disk) > > This is basically a managemnt type issue more than anything else - the > ability to migrate containers to faster/less loaded hosts, or failled > hosts and so on. (Lets assume the file and sql servers are adequately > backed up by other means) > > Anyone see any issues? Would anyone do it differently? Well, you could also use iscsi in stead of nfs ... Also, some time ago I have build -as a proof of concept, but mostly just for fun- a bootable USB-stick with a kernel, busybox, some other stuff and LXC. The usb-stick contains a small Linux system that is capable of starting LXC-containers. So you let some system boot from this USB-stick. The system provides a NIC and the harddisks. This would come close to what you describe: a config-free server that only provides storage (and in this case: network-connection) and a small environment that contains as little as possible but provides the functionality to manage and start LXC-containers. Open source software gives us so much fun :) Cheers, Matto ------------------------------------------------------------------------------ Storage Efficiency Calculator This modeling tool is based on patent-pending intellectual property that has been used successfully in hundreds of IBM storage optimization engage- ments, worldwide. Store less, Store more with what you own, Move data to the right place. Try It Now! http://www.accelacomm.com/jaw/sfnl/114/51427378/ _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
