Hi Andrei, Hi everybody,
> Gesendet: Mittwoch, 12. Mai 2021 um 16:01 Uhr > Von: fatcha...@gmx.de > An: users@clusterlabs.org > Betreff: Re: [ClusterLabs] 2 node mariadb-cluster - constraint-problems ? > > Hi Andrei, Hi everybody, > > > > You need order fs_database after promote operation; and as I just found > > pacemaker also does not reverse it correctly and executes fs stop and > > drbd demote concurrently. So you need additional order constraint to > > first stop fs then demote drbd. > > is there so good doku about this, I don't know how to archive a "after > promote operation" and how can I tell the pcs to first dismount the > filesystem mountpoint and then demote the drbd-device. > ok, so I found something and used this: pcs constraint order stop fs_logfiles then demote drbd_logsfiles-clone pcs constraint order stop fs_database then demote database_drbd-clone and it works great Thanks for the hint. But the thing I still don't understand is why the cluster demotes is active node for a short time when I reenable a node from standby back to unstandby ? Is it not possible to join the drbd as secondary without demote the primary for a short moment ? Best regards and take care fatcharly > Sorry but this is new for me. > > Best regards and take care > > fatcharly > > > > > > Gesendet: Dienstag, 11. Mai 2021 um 17:19 Uhr > > Von: "Andrei Borzenkov" <arvidj...@gmail.com> > > An: users@clusterlabs.org > > Betreff: Re: [ClusterLabs] 2 node mariadb-cluster - constraint-problems ? > > > > On 11.05.2021 17:43, fatcha...@gmx.de wrote: > > > Hi, > > > > > > I'm using a CentOS 8.3.2011 with a pacemaker-2.0.4-6.el8_3.1.x86_64 + > > > corosync-3.0.3-4.el8.x86_64 and kmod-drbd90-9.0.25-2.el8_3.elrepo.x86_64. > > > The cluster consists of two nodes which are providing a ha-mariadb with > > > the help of two drbd devices for the database and the logfiles. The > > > corosync is working over two rings and both machines are virtual > > > kvm-guests. > > > > > > Problem: > > > Node susanne is the active node and lisbon is changing from standby to > > > active, susanna is trying to demote one drbd-device but is failling to. > > > The cluster is working on properly, but the error stays. > > > This is the what happens: > > > > > > Cluster Summary: > > > * Stack: corosync > > > * Current DC: lisbon (version 2.0.4-6.el8_3.1-2deceaa3ae) - partition > > > with quo rum > > > * Last updated: Tue May 11 16:15:54 2021 > > > * Last change: Tue May 11 16:15:42 2021 by root via cibadmin on susanne > > > * 2 nodes configured > > > * 11 resource instances configured > > > > > > Node List: > > > * Online: [ lisbon susanne ] > > > > > > Active Resources: > > > * HA_IP (ocf::heartbeat:IPaddr2): Started susanne > > > * Clone Set: database_drbd-clone [database_drbd] (promotable): > > > * Masters: [ susanne ] > > > * Slaves: [ lisbon ] > > > * Clone Set: drbd_logsfiles-clone [drbd_logsfiles] (promotable): > > > * drbd_logsfiles (ocf::linbit:drbd): Demoting susanne > > > * fs_logfiles (ocf::heartbeat:Filesystem): Started susanne > > > > Presumably fs_logfiles is located on drbd_logfiles, so how comes it is > > active while drbd_logfiles is being demoted? Then drbdadm fails to > > change status to secondary and RA simply loops forever until timeout. > > > > > * fs_database (ocf::heartbeat:Filesystem): Started susanne > > > * mysql-server (ocf::heartbeat:mysql): Started susanne > > > * Clone Set: ping_fw-clone [ping_fw]: > > > * Started: [ lisbon susanne ] > > > > > > ------------------------------------------------------------------------------------------- > > > after a few seconds it switches over: > > > > > > Cluster Summary: > > > * Stack: corosync > > > * Current DC: lisbon (version 2.0.4-6.el8_3.1-2deceaa3ae) - partition > > > with quo rum > > > * Last updated: Tue May 11 16:17:59 2021 > > > * Last change: Tue May 11 16:15:42 2021 by root via cibadmin on susanne > > > * 2 nodes configured > > > * 11 resource instances configured > > > > > > Node List: > > > * Online: [ lisbon susanne ] > > > > > > Active Resources: > > > * HA_IP (ocf::heartbeat:IPaddr2): Started susanne > > > * Clone Set: database_drbd-clone [database_drbd] (promotable): > > > * Masters: [ susanne ] > > > * Slaves: [ lisbon ] > > > * Clone Set: drbd_logsfiles-clone [drbd_logsfiles] (promotable): > > > * Masters: [ susanne ] > > > * Slaves: [ lisbon ] > > > * fs_logfiles (ocf::heartbeat:Filesystem): Started susanne > > > * fs_database (ocf::heartbeat:Filesystem): Started susanne > > > * mysql-server (ocf::heartbeat:mysql): Started susanne > > > * Resource Group: apache: > > > * httpd_srv (ocf::heartbeat:apache): Started susanne > > > * Clone Set: ping_fw-clone [ping_fw]: > > > * Started: [ lisbon susanne ] > > > > > > Failed Resource Actions: > > > * drbd_logsfiles_demote_0 on susanne 'error' (1): call=736, > > > status='Timed Out' > > > , exitreason='', last-rc-change='2021-05-11 16:15:42 +02:00', queued=0ms, > > > exec=9 0001ms > > > ---------------------------------------------------------------------------------------------- > > > > > > > And what you see in logs? > > > > > I think it is a constraint-problem, but I can't find it. > > > This is my config: > > > [root@susanne pacemaker]# pcs config show Cluster Name: mysql_cluster > > > Corosync Nodes: > > > susanne lisbon > > > Pacemaker Nodes: > > > lisbon susanne > > > > > > Resources: > > > Resource: HA_IP (class=ocf provider=heartbeat type=IPaddr2) > > > Attributes: cidr_netmask=24 ip=192.168.18.154 > > > Operations: monitor interval=15s (HA_IP-monitor-interval-15s) > > > start interval=0s timeout=20s (HA_IP-start-interval-0s) > > > stop interval=0s timeout=20s (HA_IP-stop-interval-0s) > > > Clone: database_drbd-clone > > > Meta Attrs: clone-max=2 clone-node-max=1 notify=true promotable=true > > > promoted-max=1 promoted-node-max=1 > > > Resource: database_drbd (class=ocf provider=linbit type=drbd) > > > Attributes: drbd_resource=drbd1 > > > Operations: demote interval=0s timeout=90 > > > (database_drbd-demote-interval-0s) > > > monitor interval=20 role=Slave timeout=20 > > > (database_drbd-monitor-interval-20) > > > monitor interval=10 role=Master timeout=20 > > > (database_drbd-monitor-interval-10) > > > notify interval=0s timeout=90 > > > (database_drbd-notify-interval-0s) > > > promote interval=0s timeout=90 > > > (database_drbd-promote-interval-0s) > > > reload interval=0s timeout=30 > > > (database_drbd-reload-interval-0s) > > > start interval=0s timeout=240 > > > (database_drbd-start-interval-0s) > > > stop interval=0s timeout=100 > > > (database_drbd-stop-interval-0s) > > > Clone: drbd_logsfiles-clone > > > Meta Attrs: clone-max=2 clone-node-max=1 notify=true promotable=true > > > promoted-max=1 promoted-node-max=1 > > > Resource: drbd_logsfiles (class=ocf provider=linbit type=drbd) > > > Attributes: drbd_resource=drbd2 > > > Operations: demote interval=0s timeout=90 > > > (drbd_logsfiles-demote-interval-0s) > > > monitor interval=20 role=Slave timeout=20 > > > (drbd_logsfiles-monitor-interval-20) > > > monitor interval=10 role=Master timeout=20 > > > (drbd_logsfiles-monitor-interval-10) > > > notify interval=0s timeout=90 > > > (drbd_logsfiles-notify-interval-0s) > > > promote interval=0s timeout=90 > > > (drbd_logsfiles-promote-interval-0s) > > > reload interval=0s timeout=30 > > > (drbd_logsfiles-reload-interval-0s) > > > start interval=0s timeout=240 > > > (drbd_logsfiles-start-interval-0s) > > > stop interval=0s timeout=100 > > > (drbd_logsfiles-stop-interval-0s) > > > Resource: fs_logfiles (class=ocf provider=heartbeat type=Filesystem) > > > Attributes: device=/dev/drbd2 directory=/mnt/clusterfs2 fstype=ext4 > > > Operations: monitor interval=20s timeout=40s > > > (fs_logfiles-monitor-interval-20s) > > > start interval=0s timeout=60s > > > (fs_logfiles-start-interval-0s) > > > stop interval=0s timeout=60s (fs_logfiles-stop-interval-0s) > > > Resource: fs_database (class=ocf provider=heartbeat type=Filesystem) > > > Attributes: device=/dev/drbd1 directory=/mnt/clusterfs1 fstype=ext4 > > > Operations: monitor interval=20s timeout=40s > > > (fs_database-monitor-interval-20s) > > > start interval=0s timeout=60s > > > (fs_database-start-interval-0s) > > > stop interval=0s timeout=60s (fs_database-stop-interval-0s) > > > Resource: mysql-server (class=ocf provider=heartbeat type=mysql) > > > Attributes: additional_parameters=--bind-address=0.0.0.0 > > > binary=/usr/bin/mysqld_safe config=/etc/my.cnf > > > datadir=/mnt/clusterfs1/mysql pid=/var/lib/mysql/run/mariadb.pid > > > socket=/var/lib/mysql/mysql.sock > > > Operations: demote interval=0s timeout=120s > > > (mysql-server-demote-interval-0s) > > > monitor interval=20s timeout=30s > > > (mysql-server-monitor-interval-20s) > > > notify interval=0s timeout=90s > > > (mysql-server-notify-interval-0s) > > > promote interval=0s timeout=120s > > > (mysql-server-promote-interval-0s) > > > start interval=0s timeout=60s > > > (mysql-server-start-interval-0s) > > > stop interval=0s timeout=60s (mysql-server-stop-interval-0s) > > > Group: apache > > > Resource: httpd_srv (class=ocf provider=heartbeat type=apache) > > > Attributes: configfile=/etc/httpd/conf/httpd.conf > > > statusurl=http://127.0.0.1/server-status > > > Operations: monitor interval=10s timeout=20s > > > (httpd_srv-monitor-interval-10s) > > > start interval=0s timeout=40s (httpd_srv-start-interval-0s) > > > stop interval=0s timeout=60s (httpd_srv-stop-interval-0s) > > > Clone: ping_fw-clone > > > Resource: ping_fw (class=ocf provider=pacemaker type=ping) > > > Attributes: dampen=10s host_list=192.168.18.1 multiplier=1000 > > > Operations: monitor interval=10s timeout=60s > > > (ping_fw-monitor-interval-10s) > > > start interval=0s timeout=60s (ping_fw-start-interval-0s) > > > stop interval=0s timeout=20s (ping_fw-stop-interval-0s) > > > > > > Stonith Devices: > > > Fencing Levels: > > > > > > Location Constraints: > > > Resource: mysql-server > > > Constraint: location-mysql-server > > > Rule: boolean-op=or score=-INFINITY (id:location-mysql-server-rule) > > > Expression: pingd lt 1 (id:location-mysql-server-rule-expr) > > > Expression: not_defined pingd > > > (id:location-mysql-server-rule-expr-1) > > > Ordering Constraints: > > > start mysql-server then start httpd_srv (kind:Mandatory) > > > (id:order-mysql-server-httpd_srv-mandatory) > > > start database_drbd-clone then start drbd_logsfiles-clone > > > (kind:Mandatory) > > > (id:order-database_drbd-clone-drbd_logsfiles-clone-mandatory) > > > start drbd_logsfiles-clone then start fs_database (kind:Mandatory) > > > (id:order-drbd_logsfiles-clone-fs_database-mandatory) > > > > You need order fs_database after promote operation; and as I just found > > pacemaker also does not reverse it correctly and executes fs stop and > > drbd demote concurrently. So you need additional order constraint to > > first stop fs then demote drbd. > > > > > start fs_database then start fs_logfiles (kind:Mandatory) > > > (id:order-fs_database-fs_logfiles-mandatory) > > > start fs_logfiles then start mysql-server (kind:Mandatory) > > > (id:order-fs_logfiles-mysql-server-mandatory) > > > Colocation Constraints: > > > fs_logfiles with drbd_logsfiles-clone (score:INFINITY) > > > (with-rsc-role:Master) > > > (id:colocation-fs_logfiles-drbd_logsfiles-clone-INFINITY) > > > fs_database with database_drbd-clone (score:INFINITY) > > > (with-rsc-role:Master) > > > (id:colocation-fs_database-database_drbd-clone-INFINITY) > > > drbd_logsfiles-clone with database_drbd-clone (score:INFINITY) > > > (rsc-role:Master) (with-rsc-role:Master) > > > (id:colocation-drbd_logsfiles-clone-database_drbd-clone-INFINITY) > > > HA_IP with database_drbd-clone (score:INFINITY) (rsc-role:Started) > > > (with-rsc-role:Master) (id:colocation-HA_IP-database_drbd-clone-INFINITY) > > > mysql-server with fs_database (score:INFINITY) > > > (id:colocation-mysql-server-fs_database-INFINITY) > > > httpd_srv with mysql-server (score:INFINITY) > > > (id:colocation-httpd_srv-mysql-server-INFINITY) > > > Ticket Constraints: > > > > > > Alerts: > > > No alerts defined > > > > > > Resources Defaults: > > > No defaults set > > > Operations Defaults: > > > No defaults set > > > > > > Cluster Properties: > > > cluster-infrastructure: corosync > > > cluster-name: mysql_cluster > > > dc-version: 2.0.4-6.el8_3.1-2deceaa3ae > > > have-watchdog: false > > > last-lrm-refresh: 1620742514 > > > stonith-enabled: FALSE > > > > > > Tags: > > > No tags defined > > > > > > Quorum: > > > Options: > > > > > > > > > > > > > > > > > > Any suggestions are welcome > > > > > > best regards stay safe, take care > > > > > > fatcharly > > > > > > _______________________________________________ > > > Manage your subscription: > > > https://lists.clusterlabs.org/mailman/listinfo/users > > > > > > ClusterLabs home: https://www.clusterlabs.org/ > > > > > > > _______________________________________________ > > Manage your subscription: > > https://lists.clusterlabs.org/mailman/listinfo/users > > > > ClusterLabs home: https://www.clusterlabs.org/ > > > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ > _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/
