Hi~ All~ Ping.... Anyone have time to review this series? I need more comments~
Thanks Zhang Chen > -----Original Message----- > From: Zhang, Chen <chen.zh...@intel.com> > Sent: Friday, November 1, 2019 10:49 AM > To: Jason Wang <jasow...@redhat.com>; Paolo Bonzini > <pbonz...@redhat.com>; Philippe Mathieu-Daudé <phi...@redhat.com>; > qemu-dev <qemu-devel@nongnu.org> > Cc: Zhang Chen <zhangc...@gmail.com>; Zhang, Chen > <chen.zh...@intel.com> > Subject: [PATCH V2 0/4] Introduce Advanced Watch Dog module > > From: Zhang Chen <chen.zh...@intel.com> > > 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=3.3.3.3,port=9009,server,nowait > -chardev socket,id=heartbeat0,host=3.3.3.3,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=3.3.3.3,port=9009,reconnect=1 > -chardev socket,id=heart1,host=3.3.3.8,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
