Date: Fri, 30 May 2003 11:26:45 -0700 From: Sean Chittenden <sean@chittenden.org> To: Marko Zec <zec@tel.fer.hr> Cc: hackers@freebsd.org Subject: Re: Network stack cloning / virtualization patches Message-ID: <20030530182645.GP62688@perrin.int.nxad.com> In-Reply-To: <3ED14BF3.139CAC32@tel.fer.hr> References: <3ED14BF3.139CAC32@tel.fer.hr>
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> at http://www.tel.fer.hr/zec/vimage/ you can find a set of patches > against 4.8-RELEASE kernel that provide support for network stack > cloning. The patched kernel allows multiple fully independent > network stack instances to simultaneously coexist within a single OS > kernel, providing a foundation for supporting diverse new > applications, including: > > - Enhanced virtual hosting (think of jails with its own private set of > network interfaces, IP addresses, routing tables, ipfw and dummynet > instance etc.); > - High-performance real-time network simulation / emulation; > - Fully isolated overlay VPN provisioning (using IP tunnels), including > the possibility of creating nested VPNs. > > The network stacks are embedded in new resource container entities > named "virtual images". Each process and network stack instance within > the system has to be associated with a virtual image, which in effect > becomes a light or pseudo virtual machine entity. Additional goodies > include the possibility to control some other resources besides the > network stack, most notably the independent CPU load and usage > accounting, as well as feedback-driven proportional share scheduling > among virtual images. For more details, check the above URL. > Note that the patch was designed to allow all existing applications and > utilities to run unmodified on the patched kernel, so no recompiling of > the userland is necessary. > > Hope you'll find use for the new framework :-) Has anyone stepped forward to possibly shepherd this code into the tree? I am highly interested in this code and would like to see it incorporated into the base system (read: -CURRENT, before 5.2). After looking at the TODO, I realize that this patch isn't 100% yet, but can it be broken down into a smaller set of commits? Anyone doing virtual hosting would kill to have this functionality in FreeBSD right now. -sc -- Sean Chittenden
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