[ClusterLabs] Trouble with drbd/pacemaker: switch to secondary/secondary

Anne Nicolas ennael1 at gmail.com
Fri Oct 14 22:22:16 CEST 2016 

Hi!

I'm having trouble with a 2 nodes cluster used for DRBD / Apache / Samba
and some other services.

Whatever I do, it always goes to the following state:

Last updated: Fri Oct 14 17:41:38 2016
Last change: Thu Oct 13 10:42:29 2016 via cibadmin on bzvairsvr
Stack: corosync
Current DC: bzvairsvr (168430081) - partition with quorum
Version: 1.1.8-9.mga5-394e906
2 Nodes configured, unknown expected votes
13 Resources configured.


Online: [ bzvairsvr bzvairsvr2 ]

 Master/Slave Set: drbdservClone [drbdserv]
     Slaves: [ bzvairsvr bzvairsvr2 ]
 Clone Set: fencing [st-ssh]
     Started: [ bzvairsvr bzvairsvr2 ]

When I reboot bzvairsvr2 this one goes primary again. But after a while
becomes secondary also.
I use a very basic fencing system based on ssh. It's not optimal but
enough for the current tests.

Here are information about the configuration:

node 168430081: bzvairsvr
node 168430082: bzvairsvr2
primitive apache apache \
        params configfile="/etc/httpd/conf/httpd.conf" \
        op start interval=0 timeout=120s \
        op stop interval=0 timeout=120s
primitive clusterip IPaddr2 \
        params ip=192.168.100.1 cidr_netmask=24 nic=eno1 \
        meta target-role=Started
primitive clusterroute Route \
        params destination="0.0.0.0/0" gateway=192.168.100.254
primitive drbdserv ocf:linbit:drbd \
        params drbd_resource=server \
        op monitor interval=30s role=Slave \
        op monitor interval=29s role=Master start-delay=30s
primitive fsserv Filesystem \
        params device="/dev/drbd/by-res/server" directory="/Server"
fstype=ext4 \
        op start interval=0 timeout=60s \
        op stop interval=0 timeout=60s \
        meta target-role=Started
primitive libvirt-guests systemd:libvirt-guests
primitive libvirtd systemd:libvirtd
primitive mysql systemd:mysqld
primitive named systemd:named
primitive samba systemd:smb
primitive st-ssh stonith:external/ssh \
        params hostlist="bzvairsvr bzvairsvr2"
group iphd clusterip clusterroute \
        meta target-role=Started
group services libvirtd libvirt-guests apache named mysql samba \
        meta target-role=Started
ms drbdservClone drbdserv \
        meta master-max=1 master-node-max=1 clone-max=2 clone-node-max=1
notify=true target-role=Started
clone fencing st-ssh
colocation fs_on_drbd inf: fsserv drbdservClone:Master
colocation iphd_on_services inf: iphd services
colocation services_on_fsserv inf: services fsserv
order fsserv-after-drbdserv inf: drbdservClone:promote fsserv:start
order services_after_fsserv inf: fsserv services
property cib-bootstrap-options: \
        dc-version=1.1.8-9.mga5-394e906 \
        cluster-infrastructure=corosync \
        no-quorum-policy=ignore \
        stonith-enabled=true \

cluster logs are flooded by :
Oct 14 17:42:28 [3445] bzvairsvr      attrd:   notice:
attrd_trigger_update:    Sending flush op to all hosts for:
master-drbdserv (10000)
Oct 14 17:42:28 [3445] bzvairsvr      attrd:   notice:
attrd_perform_update:    Sent update master-drbdserv=10000 failed:
Transport endpoint is not connected
Oct 14 17:42:28 [3445] bzvairsvr      attrd:   notice:
attrd_perform_update:    Sent update -107: master-drbdserv=10000
Oct 14 17:42:28 [3445] bzvairsvr      attrd:  warning:
attrd_cib_callback:      Update master-drbdserv=10000 failed: Transport
endpoint is not connected
Oct 14 17:42:59 [3445] bzvairsvr      attrd:   notice:
attrd_trigger_update:    Sending flush op to all hosts for:
master-drbdserv (10000)
Oct 14 17:42:59 [3445] bzvairsvr      attrd:   notice:
attrd_perform_update:    Sent update master-drbdserv=10000 failed:
Transport endpoint is not connected
Oct 14 17:42:59 [3445] bzvairsvr      attrd:   notice:
attrd_perform_update:    Sent update -107: master-drbdserv=10000
Oct 14 17:42:59 [3445] bzvairsvr      attrd:  warning:
attrd_cib_callback:      Update master-drbdserv=10000 failed: Transport
endpoint is not connected


And here is dmesg

[34067.547147] block drbd0: peer( Secondary -> Primary )
[34091.023206] block drbd0: peer( Primary -> Secondary )
[34096.616319] drbd server: peer( Secondary -> Unknown ) conn( Connected
-> TearDown ) pdsk( UpToDate -> DUnknown )
[34096.616353] drbd server: asender terminated
[34096.616358] drbd server: Terminating drbd_a_server
[34096.682874] drbd server: Connection closed
[34096.682894] drbd server: conn( TearDown -> Unconnected )
[34096.682897] drbd server: receiver terminated
[34096.682900] drbd server: Restarting receiver thread
[34096.682902] drbd server: receiver (re)started
[34096.682915] drbd server: conn( Unconnected -> WFConnection )
[34103.311898] drbd server: Handshake successful: Agreed network
protocol version 101
[34103.311903] drbd server: Agreed to support TRIM on protocol level
[34103.311997] drbd server: Peer authenticated using 20 bytes HMAC
[34103.312046] drbd server: conn( WFConnection -> WFReportParams )
[34103.312062] drbd server: Starting asender thread (from drbd_r_server
[4344])
[34103.380311] block drbd0: drbd_sync_handshake:
[34103.380318] block drbd0: self
8B500BD87A5D76D4:0000000000000000:A1860E99AC8107A0:A1850E99AC8107A0
bits:0 flags:0
[34103.380323] block drbd0: peer
8B500BD87A5D76D4:0000000000000000:A1860E99AC8107A0:A1850E99AC8107A0
bits:0 flags:0
[34103.380327] block drbd0: uuid_compare()=0 by rule 40
[34103.380335] block drbd0: peer( Unknown -> Secondary ) conn(
WFReportParams -> Connected ) pdsk( DUnknown -> UpToDate )
[34114.046443] bnx2x 0000:05:00.0 enp5s0f0: NIC Link is Down
[34123.802580] drbd server: PingAck did not arrive in time.
[34123.802617] drbd server: peer( Secondary -> Unknown ) conn( Connected
-> NetworkFailure ) pdsk( UpToDate -> DUnknown )
[34123.802773] drbd server: asender terminated
[34123.802777] drbd server: Terminating drbd_a_server
[34123.932565] drbd server: Connection closed
[34123.932585] drbd server: conn( NetworkFailure -> Unconnected )
[34123.932588] drbd server: receiver terminated
[34123.932590] drbd server: Restarting receiver thread
[34123.932592] drbd server: receiver (re)started
[34123.932605] drbd server: conn( Unconnected -> WFConnection )
[34185.719207] bnx2x 0000:05:00.0 enp5s0f0: NIC Link is Up, 10000 Mbps
full duplex, Flow control: ON - receive & transmit
[34232.241599] bnx2x 0000:05:00.0 enp5s0f0: NIC Link is Down
[34268.637861] bnx2x 0000:05:00.0 enp5s0f0: NIC Link is Up, 10000 Mbps
full duplex, Flow control: ON - receive & transmit
[34318.675122] drbd server: Handshake successful: Agreed network
protocol version 101
[34318.675128] drbd server: Agreed to support TRIM on protocol level
[34318.675218] drbd server: Peer authenticated using 20 bytes HMAC
[34318.675258] drbd server: conn( WFConnection -> WFReportParams )
[34318.675276] drbd server: Starting asender thread (from drbd_r_server
[4344])
[34318.738909] block drbd0: drbd_sync_handshake:
[34318.738916] block drbd0: self
8B500BD87A5D76D4:0000000000000000:A1860E99AC8107A0:A1850E99AC8107A0
bits:0 flags:0
[34318.738921] block drbd0: peer
8B500BD87A5D76D4:0000000000000000:A1860E99AC8107A0:A1850E99AC8107A0
bits:0 flags:0
[34318.738924] block drbd0: uuid_compare()=0 by rule 40
[34318.738933] block drbd0: peer( Unknown -> Secondary ) conn(
WFReportParams -> Connected ) pdsk( DUnknown -> UpToDate )
[34328.812317] block drbd0: peer( Secondary -> Primary )
[37316.065793] usb 3-11: USB disconnect, device number 3
[52246.642265] block drbd0: peer( Primary -> Secondary )

Any help would be appreciated

Cheers

-- 
Anne Nicolas
http://mageia.org

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