Hi~ All~ Ping.... Anyone have time to review this series? I need more comments~ Thanks Zhang Chen > -----Original Message----- > From: Zhang, Chen <email@example.com> > Sent: Friday, November 1, 2019 10:49 AM > To: Jason Wang <firstname.lastname@example.org>; Paolo Bonzini > <email@example.com>; Philippe Mathieu-Daudé <firstname.lastname@example.org>; > qemu-dev <email@example.com> > Cc: Zhang Chen <firstname.lastname@example.org>; Zhang, Chen > <email@example.com> > Subject: [PATCH V2 0/4] Introduce Advanced Watch Dog module > > From: Zhang Chen <firstname.lastname@example.org> > > Advanced Watch Dog is an universal monitoring module on VMM side, it can > be used to detect network down(VMM to guest, VMM to VMM, VMM to > another remote server) and do previously set operation. Current AWD patch > just accept any input as the signal to refresh the watchdog timer, and we can > also make a certain interactive protocol here. For the output user can pre- > write some command or some messages in the AWD opt-script. We noticed > that there is no way for VMM communicate directly, maybe some people > think we don't need such things(up layer software like openstack can handle > it). But we engaged with real customer found that in some cases,they need a > lightweight and efficient mechanism to solve some practical > problems(openstack is too heavy). > for example: When it detects lost connection with the paired node,it will > send message to admin, notify another VMM, send qmp command to qemu > do some operation like restart the VM, build VMM heartbeat system, etc. > It make user have basic VM/Host network monitoring tools and basic false > tolerance and recovery solution. > > Demo usage(for COLO heartbeat service): > > In primary node: > > -chardev socket,id=h1,host=22.214.171.124,port=9009,server,nowait > -chardev socket,id=heartbeat0,host=126.96.36.199,port=4445 > -object iothread,id=iothread2 > -object advanced- > watchdog,id=heart1,server=on,awd_node=h1,notification_node=heartbeat > 0,opt_script=colo_opt_script_path,iothread=iothread1,pulse_interval=1000, > timeout=5000 > > In secondary node: > > -monitor tcp::4445,server,nowait > -chardev socket,id=h1,host=188.8.131.52,port=9009,reconnect=1 > -chardev socket,id=heart1,host=184.108.40.206,port=4445 > -object iothread,id=iothread1 > -object advanced- > watchdog,id=heart1,server=off,awd_node=h1,notification_node=heart1,op > t_script=colo_secondary_opt_script,iothread=iothread1,timeout=10000 > > > V2: > - Addressed Philippe comments add configure selector for AWD. > > Initial: > - Initial version. > > Zhang Chen (4): > net/awd.c: Introduce Advanced Watch Dog module framework > net/awd.c: Initailize input/output chardev > net/awd.c: Load advanced watch dog worker thread job > vl.c: Make Advanced Watch Dog delayed initialization > > configure | 9 + > net/Makefile.objs | 1 + > net/awd.c | 491 > ++++++++++++++++++++++++++++++++++++++++++++++ > qemu-options.hx | 6 + > vl.c | 7 + > 5 files changed, 514 insertions(+) > create mode 100644 net/awd.c > > -- > 2.17.1
"Zhang, Chen" <email@example.com> writes: > Hi~ All~ > > Ping.... Anyone have time to review this series? I need more comments~ Any takers?
> -----Original Message----- > From: Markus Armbruster <firstname.lastname@example.org> > Sent: Wednesday, November 27, 2019 11:49 PM > To: Zhang, Chen <email@example.com> > Cc: Jason Wang <firstname.lastname@example.org>; Paolo Bonzini > <email@example.com>; Philippe Mathieu-Daudé <firstname.lastname@example.org>; > qemu-dev <email@example.com>; Zhang Chen <firstname.lastname@example.org> > Subject: Re: [PATCH V2 0/4] Introduce Advanced Watch Dog module > > "Zhang, Chen" <email@example.com> writes: > > > Hi~ All~ > > > > Ping.... Anyone have time to review this series? I need more comments~ > > Any takers? Hi Markus, Thank you for your attention. This is a very simple module to complete the tasks related to error detection and automatic processing. I have write the detail reason why we need it in real environment on the commit log. Here is the latest patch: https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02872.html Thanks Zhang Chen
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