我试图通过drbd和fiesystem在Ubuntu 14.04上启动postgres服务器。
服务状态如下：
Last updated: Mon Mar 14 01:16:45 2016 Last change: Mon Mar 14 01:05:53 2016 via cibadmin on node1 Stack: corosync Current DC: node2 (2) - partition with quorum Version: 1.1.10-42f2063 2 Nodes configured 5 Resources configured Online: [ node1 node2 ] Master/Slave Set: ms_drbd [drbd_postgres] Masters: [ node1 ] Stopped: [ node2 ] Resource Group: database fs_postgres (ocf::heartbeat:Filesystem): Started node1 ip_postgres (ocf::heartbeat:IPaddr2): Started node1 postgresql (ocf::heartbeat:pgsql): Stopped Failed actions: drbd_postgres_start_0 (node=node2, call=367, rc=1, status=complete, last-rc-change=Mon Mar 14 00:55:56 2016 , queued=3798ms, exec=0ms ): unknown error 我的群集configuration如下：
node $id="1" node1 node $id="2" node2 primitive drbd_postgres ocf:linbit:drbd \ params drbd_resource="db_disk" \ op monitor interval="29s" role="Master" \ op monitor interval="31s" role="Slave" primitive fs_postgres ocf:heartbeat:Filesystem \ params device="/dev/drbd0" directory="/var/lib/postgresql/9.5/main" fstype="ext4" primitive ip_postgres ocf:heartbeat:IPaddr2 \ params ip="192.168.1.103" cidr_netmask="24" \ op monitor interval="30s" primitive postgresql ocf:heartbeat:pgsql \ params config="/etc/postgresql/9.5/main/postgresql.conf" \ params pgctl="/usr/lib/postgresql/9.5/bin/pg_ctl" \ params pgdata="/var/lib/postgresql/9.5/main" \ op start interval="0" timeout="120s" \ op stop interval="0" timeout="120s" \ meta target-role="Started" group database fs_postgres ip_postgres postgresql ms ms_drbd drbd_postgres \ meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true" colocation fs_on_drbd inf: fs_postgres ms_drbd:Master colocation postgresql_on_drbd inf: database ms_drbd:Master order postgres_after_fs inf: fs_postgres:promote postgresql:start order postgresql_after_drbd inf: ms_drbd:promote database:start property $id="cib-bootstrap-options" \ dc-version="1.1.10-42f2063" \ cluster-infrastructure="corosync" \ stonith-enabled="false" \ no-quorum-policy="ignore" node $id="1" node1 node $id="2" node2 primitive drbd_postgres ocf:linbit:drbd \ params drbd_resource="db_disk" \ op monitor interval="29s" role="Master" \ op monitor interval="31s" role="Slave" primitive fs_postgres ocf:heartbeat:Filesystem \ params device="/dev/drbd0" directory="/var/lib/postgresql/9.5/main" fstype="ext4" primitive ip_postgres ocf:heartbeat:IPaddr2 \ params ip="192.168.1.103" cidr_netmask="24" \ op monitor interval="30s" primitive postgresql ocf:heartbeat:pgsql \ params config="/etc/postgresql/9.5/main/postgresql.conf" \ params pgctl="/usr/lib/postgresql/9.5/bin/pg_ctl" \ params pgdata="/var/lib/postgresql/9.5/main" \ op start interval="0" timeout="120s" \ op stop interval="0" timeout="120s" \ meta target-role="Started" group database fs_postgres ip_postgres postgresql ms ms_drbd drbd_postgres \ meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true" colocation fs_on_drbd inf: fs_postgres ms_drbd:Master colocation postgresql_on_drbd inf: database ms_drbd:Master order postgres_after_fs inf: fs_postgres:promote postgresql:start order postgresql_after_drbd inf: ms_drbd:promote database:start property $id="cib-bootstrap-options" \ dc-version="1.1.10-42f2063" \ cluster-infrastructure="corosync" \ stonith-enabled="false" \ no-quorum-policy="ignore"
Corosyncconfiguration：
totem { version: 2 cluster_name: postgresql transport: udpu interface { ringnumber: 0 bindnetaddr: 192.168.1.0 broadcast: yes mcastport: 5405 } } quorum { provider: corosync_votequorum expected_votes: 2 two_node: 1 } nodelist { node { ring0_addr: 192.168.1.101 name: node1 nodeid: 1 } node { ring0_addr: 192.168.1.102 name: node2 nodeid: 2 } } logging { to_logfile: yes logfile: /var/log/corosync/corosync.log to_syslog: yes timestamp: on }
DRBDconfiguration：
resource db_disk { device /dev/drbd0; meta-disk internal; syncer { rate 40M; } on node1 { address 172.16.1.101:7789; disk /dev/sdb1; } on node2 { address 172.16.1.102:7789; disk /dev/sdb1; } }
我没有看到日志中的任何错误消息，但这一个：
root@node1:/var/log# egrep 'ERR|WARN' syslog Mar 14 01:06:48 node1 Filesystem(fs_postgres)[13266]: WARNING: Couldn't find device [/dev/drbd0]. Expected /dev/??? to exist root@node1:/var/log#
似乎需要一个oder约束，这确保文件系统的挂载等待，直到drbd资源被提升为主要成功为止。 没有订单限制，Pacemaker可以尝试挂载FS，而DRBD仍然是次要angular色，这是drbd不允许的。
尝试这个：
order fs_after_drbd inf: ms_drbd:promote fs_postgres:start