RE: [PATCH 0/5] colo: Introduce resource agent and test suite/CI

["Zhang, Chen" <chen.zhang@intel.com>]

> -----Original Message-----
> From: Lukas Straub <lukasstraub2@web.de>
> Sent: Sunday, June 7, 2020 3:00 AM
> To: Zhang, Chen <chen.zhang@intel.com>
> Cc: qemu-devel <qemu-devel@nongnu.org>; Alberto Garcia
> <berto@igalia.com>; Dr. David Alan Gilbert <dgilbert@redhat.com>; Jason
> Wang <jasowang@redhat.com>
> Subject: Re: [PATCH 0/5] colo: Introduce resource agent and test suite/CI
> 
> On Mon, 18 May 2020 09:38:24 +0000
> "Zhang, Chen" <chen.zhang@intel.com> wrote:
> 
> > > -----Original Message-----
> > > From: Lukas Straub <lukasstraub2@web.de>
> > > Sent: Monday, May 11, 2020 8:27 PM
> > > To: qemu-devel <qemu-devel@nongnu.org>
> > > Cc: Alberto Garcia <berto@igalia.com>; Dr. David Alan Gilbert
> > > <dgilbert@redhat.com>; Zhang, Chen <chen.zhang@intel.com>
> > > Subject: [PATCH 0/5] colo: Introduce resource agent and test
> > > suite/CI
> > >
> > > Hello Everyone,
> > > These patches introduce a resource agent for fully automatic
> > > management of colo and a test suite building upon the resource agent to
> extensively test colo.
> > >
> > > Test suite features:
> > > -Tests failover with peer crashing and hanging and failover during
> > > checkpoint -Tests network using ssh and iperf3 -Quick test requires
> > > no special configuration -Network test for testing colo-compare
> > > -Stress test: failover all the time with network load
> > >
> > > Resource agent features:
> > > -Fully automatic management of colo
> > > -Handles many failures: hanging/crashing qemu, replication error,
> > > disk error, ...
> > > -Recovers from hanging qemu by using the "yank" oob command -Tracks
> > > which node has up-to-date data -Works well in clusters with more
> > > than 2 nodes
> > >
> > > Run times on my laptop:
> > > Quick test: 200s
> > > Network test: 800s (tagged as slow)
> > > Stress test: 1300s (tagged as slow)
> > >
> > > The test suite needs access to a network bridge to properly test the
> > > network, so some parameters need to be given to the test run. See
> > > tests/acceptance/colo.py for more information.
> > >
> > > I wonder how this integrates in existing CI infrastructure. Is there
> > > a common CI for qemu where this can run or does every subsystem have
> > > to run their own CI?
> >
> > Wow~ Very happy to see this series.
> > I have checked the "how to" in tests/acceptance/colo.py, But it looks
> > not enough for users, can you write an independent document for this
> series?
> > Include test Infrastructure ASC II diagram,  test cases design ,
> > detailed how to and more information for pacemaker cluster and resource
> agent..etc ?
> 
> Hi,
> I quickly created a more complete howto for configuring a pacemaker cluster
> and using the resource agent, I hope it helps:
> https://wiki.qemu.org/Features/COLO/Managed_HOWTO

Hi Lukas,

I noticed you contribute some content in Qemu COLO WIKI.
For the Features/COLO/Manual HOWTO
https://wiki.qemu.org/Features/COLO/Manual_HOWTO

Why not keep the Secondary side start command same with the qemu/docs/COLO-FT.txt?
If I understand correctly, add the quorum related command in secondary will support resume replication.
Then, we can add primary/secondary resume step here.

Thanks
Zhang Chen

> 
> Regards,
> Lukas Straub
> 
> > Thanks
> > Zhang Chen
> >
> >
> > >
> > > Regards,
> > > Lukas Straub
> > >
> > >
> > > Lukas Straub (5):
> > >   block/quorum.c: stable children names
> > >   colo: Introduce resource agent
> > >   colo: Introduce high-level test suite
> > >   configure,Makefile: Install colo resource-agent
> > >   MAINTAINERS: Add myself as maintainer for COLO resource agent
> > >
> > >  MAINTAINERS                              |    6 +
> > >  Makefile                                 |    5 +
> > >  block/quorum.c                           |   20 +-
> > >  configure                                |   10 +
> > >  scripts/colo-resource-agent/colo         | 1429 ++++++++++++++++++++++
> > >  scripts/colo-resource-agent/crm_master   |   44 +
> > >  scripts/colo-resource-agent/crm_resource |   12 +
> > >  tests/acceptance/colo.py                 |  689 +++++++++++
> > >  8 files changed, 2209 insertions(+), 6 deletions(-)  create mode
> > > 100755 scripts/colo-resource-agent/colo  create mode 100755
> > > scripts/colo-resource- agent/crm_master  create mode 100755
> > > scripts/colo-resource-agent/crm_resource
> > >  create mode 100644 tests/acceptance/colo.py
> > >
> > > --
> > > 2.20.1