Well, I'm a newbie myself.  But this:
drbdadm primary --force ___the name of the drbd res___
has worked for me.  But I'm having lots of trouble myself,
so...
then there's this:
drbdadm -- --overwrite-data-of-peer primary bravo
(bravo happens to be my drbd res) and that should also
strongarm one machine or another to be the primary.

j.

On Fri, Oct 14, 2016 at 3:22 PM, Anne Nicolas <enna...@gmail.com> wrote:

> 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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