[DRBD-user] Problems establishing replication after upgrade to recenty elrepo package

[Ciaś, J. (Jakub)]

Hi DRBD Community,

I've just noticed that after recent DRBD upgrade to the newest elrepo package I'm unable to establish replication for a newly created 50G volume.
Everything worked fine before upgrade. Only Kernel and DRBD packages were upgraded, so I don't suspect any other change as a cause.
Other 64 volumes which were created previously are working and replicating without any problems. I can even disconnect and reconnect them at any time.
The issue is only for the new volume.
Is this a known regression or maybe something has changed in process of creating replication for recent version?
Any help/hint/workaround would be much appreciated.

Actions:

Node A: # drbdadm connect somevol
(result: volume on node A switches from StandAlone to Connecting)
Node B: # drbdadm connect --discard-my-data somevol
(result: volume on node B switches from AtandAlone to Connecting, and volume on node A immediately switches back to StandAlone)

Events:

(Node A)

drbdsetup events2 somevol
exists resource name: somevol role:Primary suspended:no
exists connection name:somevol peer-node-id:0 conn-name:node-a connection:StandAlone role:Unknown
exists device name:somevol volume:0 minor:225 disk:UpToDate client:no quorum:yes
exists peer-device name:somevol peer-node-id:0 conn-name:node-b volume:0 replication:Off peer-disk:DUnknown peer-client:no resync-suspended:no
exists -
change connection name:somevol peer-node-id:0 conn-name:node-b connection:Unconnected
change connection name:somevol peer-node-id:0 conn-name:node-b connection:Connecting
change path name:somevol peer-node-id:0 conn-name:node-b local:ipv4:10.y.y.y:16225 peer:ipv4:10.x.x.x:16225 established:yes
change connection name:somevol peer-node-id:0 conn-name:node-b connection:Connected role:Secondary
change connection name:somevol peer-node-id:0 conn-name:node-b connection:Disconnecting role:Unknown
change path name:somevol peer-node-id:0 conn-name:node-b local:ipv4:10.y.y.y:16225 peer:ipv4:10.x.x.x:16225 established:no
change connection name:somevol peer-node-id:0 conn-name:node-b connection:StandAlone

(Node B)
[root at node-b NAS O66 ~]# drbdsetup events2 somevol
exists resource name:somevol role:Secondary suspended:no
exists connection name:somevol peer-node-id:1 conn-name:node-a connection:StandAlone role:Unknown
exists device name:somevol volume:0 minor:225 disk:UpToDate client:no quorum:yes
exists peer-device name:somevol peer-node-id:1 conn-name:node-a volume:0 replication:Off peer-disk:DUnknown peer-client:no resync-suspended:no
exists -
change connection name:somevol peer-node-id:1 conn-name:node-a connection:Unconnected
change connection name:somevol peer-node-id:1 conn-name:node-a connection:Connecting
change path name:somevol peer-node-id:1 conn-name:node-a local:ipv4:10.x.x.x:16225 peer:ipv4:10.y.y.y:16225 established:yes
change connection name:somevol peer-node-id:1 conn-name:node-a connection:Connected role:Primary
change connection name:somevol peer-node-id:1 conn-name:node-a connection:Disconnecting role:Unknown
change device name:somevol volume:0 minor:225 disk:Consistent client:no quorum:yes
change device name:somevol volume:0 minor:225 disk:UpToDate client:no quorum:yes
change path name:somevol peer-node-id:1 conn-name:node-a local:ipv4:10.x.x.x:16225 peer:ipv4:10.y.y.y:16225 established:no
change connection name:somevol peer-node-id:1 conn-name:node-a connection:StandAlone


System details:

2 storage nodes:
# hostnamectl
(...)
Operating System: Red Hat Enterprise Linux
     CPE OS Name: cpe:/o:redhat:enterprise_linux:7.8:GA:server
          Kernel: Linux 3.10.0-1127.el7.x86_64
    Architecture: x86-64

# rpm -qa | grep drbd
kmod-drbd90-9.0.22-2.el7_8.elrepo.x86_64
drbd90-utils-sysvinit-9.12.2-1.el7.elrepo.x86_64
drbd90-utils-9.12.2-1.el7.elrepo.x86_64

Resource for a volume (same definition on both nodes)
# cat /etc/drbd.d/somevol.res
resource somevol {
        protocol C;
        meta-disk internal;
        device /dev/drbd225;
        disk /dev/nasvg/somevol;
        on lx1712 { address 10.x.x.x:16225;  }
        on lx1714 { address 10.y.y.y:16225; }
}


Pozdrawiam / Best Regards

Jakub Ciaś
Sr. DevOps Expert
Tech / Infra / IaaS / Intelligent Automation
M +48 667-974-987
E Jakub.Cias at ing.com<mailto:Jakub.Cias at ing.comservicespolska.pl>
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