On 01/08/2016 07:19 PM, Dr. David Alan Gilbert wrote:
* Zhang Chen (zhangchen.f...@cn.fujitsu.com) wrote:
From: zhangchen <zhangchen.f...@cn.fujitsu.com>
Hi,all
This patch add an colo-proxy object, COLO-Proxy is a part of COLO,
based on qemu netfilter and it's a plugin for qemu netfilter. the function
keep Secondary VM connect normal to Primary VM and compare packets
sent by PVM to sent by SVM.if the packet difference,notify COLO do
checkpoint and send all primary packet has queued.
You can also get the series from:
https://github.com/zhangckid/qemu/tree/colo-v2.2-periodic-mode-with-colo-proxyV2
Are you sure that tag is correct? The series of commits doesn't seem to match
up with the set of commits posted.
Dave
Yes, it is. we have some code fix in other colo unrelated file.
in email, I just send colo related part.
zhangchen
Thanks for review
Usage:
primary:
-netdev tap,id=bn0 -device e1000,netdev=bn0
-object colo-proxy,id=f0,netdev=bn0,queue=all,mode=primary,addr=host:port
secondary:
-netdev tap,id=bn0 -device e1000,netdev=bn0
-object colo-proxy,id=f0,netdev=bn0,queue=all,mode=secondary,addr=host:port
NOTE:
queue must set "all". See enum NetFilterDirection for detail.
colo-proxy need queue all packets
colo-proxy V2 just can compare ip packet
## Background
COLO FT/HA (COarse-grain LOck-stepping Virtual Machines for Non-stop Service)
project is a high availability solution. Both Primary VM (PVM) and Secondary VM
(SVM) run in parallel. They receive the same request from client, and generate
responses in parallel too. If the response packets from PVM and SVM are
identical, they are released immediately. Otherwise, a VM checkpoint (on
demand)is conducted.
Paper:
http://www.socc2013.org/home/program/a3-dong.pdf?attredirects=0
COLO on Xen:
http://wiki.xen.org/wiki/COLO_-_Coarse_Grain_Lock_Stepping
COLO on Qemu/KVM:
http://wiki.qemu.org/Features/COLO
By the needs of capturing response packets from PVM and SVM and finding out
whether they are identical, we introduce a new module to qemu networking
called colo-proxy.
V2:
rebase colo-proxy with qemu-colo-v2.2-periodic-mode
fix dave's comments
fix wency's comments
fix zhanghailiang's comments
v1:
initial patch.
zhangchen (10):
Init colo-proxy object based on netfilter
Jhash: add linux kernel jhashtable in qemu
Colo-proxy: add colo-proxy framework
Colo-proxy: add data structure and jhash func
net/colo-proxy: Add colo interface to use proxy
net/colo-proxy: add socket used by forward func
net/colo-proxy: Add packet enqueue & handle func
net/colo-proxy: Handle packet and connection
net/colo-proxy: Compare pri pkt to sec pkt
net/colo-proxy: Colo-proxy do checkpoint and clear
include/qemu/jhash.h | 61 ++++
net/Makefile.objs | 1 +
net/colo-proxy.c | 939 +++++++++++++++++++++++++++++++++++++++++++++++++++
net/colo-proxy.h | 24 ++
qemu-options.hx | 6 +
trace-events | 8 +
vl.c | 3 +-
7 files changed, 1041 insertions(+), 1 deletion(-)
create mode 100644 include/qemu/jhash.h
create mode 100644 net/colo-proxy.c
create mode 100644 net/colo-proxy.h
--
1.9.1
--
Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
.
--
Thanks
zhangchen