The pacemaker of the enterprise

Pacemaker, is a cluster resource manager. It enables node and resource level failure detection and recovery of the maximum Availability Cluster service (also known as resource management) using the messaging and membership capabilities provided by your preferred cluster infrastructure (Openais or Heaerbeat).
It can do clusters of any size and comes with a robust dependency model that enables administrators to accurately express the relationships between cluster resources (including order and location). Almost any script that can be scripted can be administered as part of a pacemaker cluster.

Features of Pacemaker:

• Host and application-level fault detection and recovery

• Support for virtually any redundant configuration

• Supports multiple cluster configuration modes at the same time

• Configuration policy handles quorum loss (when multiple machines fail)

• Support app startup/shutdown sequence

• Supported, must/must run on the same machine application

• Applications that support multiple modes (such as master/slave)

• You can test for any failure or cluster status

• 
  

• Primitive (native): basic resources, raw resources

• Group: Resource Group

• Clone: Clones the resource (which can be run on multiple nodes at the same time) before cloning is defined as primitive. Mainly includes stonith and clustered file system (cluster filesystem)

• Master/slave: master-slave resources such as Drdb

• Lsb:linux tables in the library, typically located in the/etc/rc.d/init.d/directory support Start|stop|status and other parameters of the service script are LSB

• Ocf:open cluster framework, open cluster architecture

• Heartbeat:heartbaet V1 Version

• Stonith: Designed for configuring Stonith devices

172.25.85.2 server2.example.com (1024)
172.25.85.3 server3.example.com (1024)


1. SERVER2/3:
/etc/init.d/ldirectord stop
Chkconfig Ldirectord off
Yum Install Pacemaker-y
Rpm-q Corosync


Server2:
Cd/etc/corosync
CP Corosync.conf.example corosync.conf

Vim/etc/corosync/corosync.conf

Bindnetaddr:172.25.85.0service {Name:pacemaker ver:0}

scp/etc/corosync/corosync.conf [Email protected]:/etc/corosync/


/etc/init.d/corosync start
CRM_VERIFY-LV # #检测配置文件是否正确




Server3:
/etc/init.d/corosync start
Tail-f/var/log/messages





2. Server2:
Yum Install crmsh-1.2.6-0.rc2.2.1.x86_64.rpm pssh-2.3.1-2.1.x86_64.rpm

Crm

CRM (Live) configure# Property No-quorum-policy=ignore # #将修改同步到其他节点crm (live) configure# commit

Vim/etc/httpd/conf/httpd.conf

<Location/server-status> SetHandler server-status Order Deny,allow deny from all to 127.0.0.1&L T;/location>

Crm

CRM (Live) configure# primitive VIP OCF:HEARTBEAT:IPADDR2 params ip=172.25.85.100 CRM (live) configure# primitive VIP OCF: HEARTBEAT:IPADDR2 params ip=172.25.85.100 cidr_netmask=32 op monitor interval=30s primitive website ocf:heartbeat: Apache params configfile=/etc/httpd/conf/httpd.conf op monitor interval=60s CRM (live) configure# commit

You can use Crm_mon to view:
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CRM (Live) configure# collocation website-with-ip inf:website VIP # #将这两个资源整合到一个主 On-Machine

CRM (Live) configure# commit

CRM (live) configure# Delete Website-with-ip
CRM (Live) configure# commit

CRM (live) configure# Group Apache VIP website # #创建一个资源组apac He

CRM (Live) configure# commit

Crm_mon
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CRM (Live) node# Showserver2.example.com:normalserver3.example.com:normalcrm (live) node# standby server2.example.com

CRM (Live) resource# stop Apache CRM (live) resource# Show Resource Group:apache VIP (OCF::HEARTBEAT:IPADDR2): Stop PED website (ocf::heartbeat:apache): Stoppedcrm (live) configure# delete Apache CRM (live) configure# Delete websit eCRM (live) configure# commit

Note
To delete a resource:
CRM (Live) resource# stop website
CRM (live) configure# Delete website



Server3:
Yum Install crmsh-1.2.6-0.rc2.2.1.x86_64.rpm pssh-2.3.1-2.1.x86_64.rpm

Vim/etc/httpd/conf/httpd.conf

<Location/server-status> SetHandler server-status Order Deny,allow deny from all to 127.0.0.1&L T;/location>

Crm_mon # #



3. True on-machine: Systemctl start Fence_virtd.service


Server2:
Stonith_admin-i
Stonith_admin-m-A FENCE_XVM

Crm

CRM (Live) configure# property stonith-enabled=true

Primitive vmfence STONITH:FENCE_XVM params pcmk_host_map= "server2.example.com:ricci1;server3.example.com: HEARTBEAT1 "OP Monitor interval=1min

Primitive SqlData OCF:LINBIT:DRBD params drbd_resource=sqldata op monitor interval=30s

Ms Sqldataclone SqlData Meta master-max=1 master-node-max=1 clone-max=2 clone-node-max=1 notify=true

CRM (Live) configure# commit

Crm_mon

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Primitive Sqlfs ocf:heartbeat:Filesystem params device=/dev/drbd1 directory=/var/lib/mysql FSTYPE=EXT4

colocation SQLFS_ON_DRBD Inf:sqlfs Sqldataclone:master

Order Sqlfs-after-sqldata Inf:sqldataclone:promote Sqlfs:start

CRM (Live) configure# commit

Crm_mon

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CRM (Live) configure# primitive MySQL lsb:mysqld op monitor interval=30scrm (live) configure# group MyGroup VIP Sqlfs Mysqlin Fo:resource references in COLOCATION:SQLFS_ON_DRBD updatedinfo:resource references in Order:sqlfs-after-sqldata Updated

CRM (Live) configure# commit

Crm_mon

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CRM (Live) resource# refresh MyGroup



Server3:
Crm_mon # #监控节点状态

The pacemaker of the enterprise