[ClusterLabs] Antw: Re: 答复: the PAF switchover does not happen if the VIP resource is stopped

[Ulrich Windl]

>>> emmanuel segura <emi2fast at gmail.com> schrieb am 26.04.2018 um 10:00 in
Nachricht
<CAE7pJ3AgTLyoV7-bS=vxshEtrKPvP8o7VKo=vfxEJv4unMW6ZA at mail.gmail.com>:
> But I think using ifdown isn't the correct way to test the cluster, this
> topic was discussed many times

I agree: But if you cannot pull the plug (like for a VM), what do you
suggest?: A blockhole route?

> 
> 2018-04-26 9:53 GMT+02:00 范国腾 <fanguoteng at highgo.com>:
> 
>> 1. There is no failure in initial status. sds1 is master
>>
>>
>>
>> 2. ifdown the sds1 VIP network card.
>>
>> 3. ifup the sds1 VIP network card and then ifdown sds2 VIP network card
>>
>>
>>
>>
>>
>> -----邮件原件-----
>> 发件人: Jehan-Guillaume de Rorthais [mailto:jgdr at dalibo.com]
>> 发送时间: 2018年4月26日 15:07
>> 收件人: 范国腾 <fanguoteng at highgo.com>
>> 抄送: Cluster Labs - All topics related to open-source clustering welcomed <
>> users at clusterlabs.org>; 李梦怡 <limengyi at highgo.com>
>> 主题: Re: [ClusterLabs] the PAF switchover does not happen if the VIP
>> resource is stopped
>>
>>
>>
>> On Thu, 26 Apr 2018 02:53:33 +0000
>>
>> 范国腾 <fanguoteng at highgo.com> wrote:
>>
>>
>>
>> > Hi Rorthais，
>>
>> >
>>
>> > Thank you for your help.
>>
>> >
>>
>> > The replication works at that time.
>>
>> >
>>
>> > I try again today.
>>
>> > (1) If I run "ifup enp0s3" in node2, then run "ifdown enp0s3" in
>>
>> > node1, the switchover issue could be reproduced. (2) But if I run
>>
>> > "ifup enp0s3" in node2, run "pcs resource cleanup mastergroup" to
>>
>> > clean the VIP resource, and there is no Failed Actions in "pcs
>>
>> > status", then run "ifdown enp0s3" in node1, it works. The switchover
>> could happened again.
>>
>> >
>>
>> >
>>
>> > Is there any parameter to control this behaviors so that I don't need
>>
>> > to execute the "pcs cleanup" command every time?
>>
>>
>>
>> Check the failcounts for each resource on each nodes (pcs resource
>> failcount [...]).
>>
>> Check the scores as well (crm_simulate -sL).
>>
>>
>>
>> >
>>
>> > -----邮件原件-----
>>
>> > 发件人: Jehan-Guillaume de Rorthais [mailto:jgdr at dalibo.com 
>> <jgdr at dalibo.com>]
>>
>> > 发送时间: 2018年4月25日 18:39
>>
>> > 收件人: 范国腾 <fanguoteng at highgo.com>
>>
>> > 抄送: Cluster Labs - All topics related to open-source clustering
>>
>> > welcomed <users at clusterlabs.org>; 李梦怡 <limengyi at highgo.com> 主题: Re:
>>
>> > [ClusterLabs] the PAF switchover does not happen if the VIP resource
>>
>> > is stopped
>>
>> >
>>
>> >
>>
>> > On Wed, 25 Apr 2018 08:58:34 +0000
>>
>> > 范国腾 <fanguoteng at highgo.com> wrote:
>>
>> >
>>
>> > >
>>
>> > > Our lab has two resource: (1) PAF (master/slave)    (2) VIP (bind to
>> the
>>
>> > > master PAF node). The configuration is in the attachment.
>>
>> > >
>>
>> > > Each node has two network card: One(enp0s8) is for the pacemaker
>>
>> > > heartbeat in internal network, the other(enp0s3) is for the master
>>
>> > > VIP in the external network.
>>
>> > >
>>
>> > >
>>
>> > >
>>
>> > > We are testing the following case: if the master VIP network card is
>>
>> > > down, the master postgres and VIP could switch to another node.
>>
>> > >
>>
>> > >
>>
>> > >
>>
>> > > 1. At first, node2 is master, I run "ifdown enp0s3" in node2, then
>>
>> > > node1 become the master, that is ok.
>>
>> > >
>>
>> > > 2. Then I run "ifup enp0s3" in node2, wait for 60 seconds,
>>
>> >
>>
>> > Did you check PostgreSQL instances were replicating again?
>>
>> >
>>
>> > > then run "ifdown enp0s3" in node1, but the node1 still be master.
>>
>> > > Why does switchover doesn't happened? How to recover to make system
>> work?
>>
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> 
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