环境说明:
操作系统: CentOS 6.6 x64,本文采用rpm方式安装corosync+pacemaker+drbd+nfs。
本文与上文配置进行了一个对比，实现相同的功能，具体哪个好，还是根据需求以及对哪个方案理解比较透，Heartbeat+DRBD+NFS高可用实例配置http://koumm.blog.51cto.com/703525/1737702
一、双机Heartbeat配置
1. app1,app2配置hosts文件，以及主机名。
[root@app1 soft]# vi /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.24 app1
192.168.0.25 app2
10.10.10.24 app1-priv
10.10.10.25 app2-priv
说明：10段是心跳IP, 192.168段是业务IP, 采用VIP地址是192.168.0.26。
2. 关闭selinux与防火墙
sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config
setenforce 0
chkconfig iptables off
service iptables stop
3. 配置各节点ssh互信，好像可配\可不配,方便管理。
app1:
[root@app1 ~]# ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ''
[root@app1 ~]# ssh-copy-id -i .ssh/id_rsa.pub root@app2
app2:
[root@app2 ~]# ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ''
[root@app2 ~]# ssh-copy-id -i .ssh/id_rsa.pub root@app1
二、DRDB安装配置
1. app1,app2配置hosts文件以及准备磁盘分区
app1: /dev/sdb1 —> app2: /dev/sdb1
2. app1,app2安装drbd并安装
(1) 下载drbd安装包, CentOS6.6采用kmod-drbd84-8.4.5-504.1安装包才可用。
http://rpm.pbone.net/
drbd84-utils-8.9.1-1.el6.elrepo.x86_64.rpm
kmod-drbd84-8.4.5-504.1.el6.x86_64.rpm
# rpm -ivh drbd84-utils-8.9.5-1.el6.elrepo.x86_64.rpm kmod-drbd84-8.4.5-504.1.el6.x86_64.rpm
Preparing... ########################################### [100%]
1:drbd84-utils ########################################### [ 50%]
2:kmod-drbd84 ########################################### [100%]
Working. This may take some time ...
Done.
#
(2) 加载DRBD到内核模块
app1,app2分别操作，并加入到/etc/rc.local文件中。
modprobe drbd
lsmode |grep drbd
3. 创建修改配置文件。节点1，节点2一样配置。
[root@app1 ~]# vi /etc/drbd.d/global_common.conf
global {
usage-count no;
}
common {
protocol C;
disk {
on-io-error detach;
no-disk-flushes;
no-md-flushes;
}
net {
sndbuf-size 512k;
max-buffers 8000;
unplug-watermark 1024;
max-epoch-size 8000;
cram-hmac-alg "sha1";
shared-secret "hdhwXes23sYEhart8t";
after-sb-0pri disconnect;
after-sb-1pri disconnect;
after-sb-2pri disconnect;
rr-conflict disconnect;
}
syncer {
rate 300M;
al-extents 517;
}
}
resource data {
on app1 {
device /dev/drbd0;
disk /dev/sdb1;
address 10.10.10.24:7788;
meta-disk internal;
}
on app2 {
device /dev/drbd0;
disk /dev/sdb1;
address 10.10.10.25:7788;
meta-disk internal;
}
}
4. 初始化资源
在app1和app2上分别执行：
# drbdadm create-md data
initializing activity log
NOT initializing bitmap
Writing meta data...
New drbd meta data block successfully created.
5. 启动服务
在app1和app2上分别执行：或采用 drbdadm up data
# service drbd start
Starting DRBD resources: [
create res: data
prepare disk: data
adjust disk: data
adjust net: data
]
..........
#
6. 查看启动状态, 两节点应均处于Secondary状态。
cat /proc/drbd #或者直接使用命令drbd-overview
节点1:
[root@app1 drbd.d]# cat /proc/drbd
version: 8.4.5 (api:1/proto:86-101)
GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96 build by [email protected], 2015-01-02 12:06:20
0: cs:Connected ro:Secondary/Secondary ds:Inconsistent/Inconsistent C r-----
ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:20964116
节点2:
[root@app2 drbd.d]# cat /proc/drbd
version: 8.4.5 (api:1/proto:86-101)
GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96 build by [email protected], 2015-01-02 12:06:20
0: cs:Connected ro:Secondary/Secondary ds:Inconsistent/Inconsistent C r-----
ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:20964116
7. 将其中一个节点配置为主节点
我们需要将其中一个节点设置为Primary，在要设置为Primary的节点上执行如下两条命令均可：
drbdadm -- --overwrite-data-of-peer primary data
主节点查看同步状态：
[root@app1 drbd.d]# cat /proc/drbd
version: 8.4.5 (api:1/proto:86-101)
GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96 build by [email protected], 2015-01-02 12:06:20
0: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r-----
ns:1229428 nr:0 dw:0 dr:1230100 al:0 bm:0 lo:0 pe:2 ua:0 ap:0 ep:1 wo:d oos:19735828
[>...................] sync'ed: 5.9% (19272/20472)M
finish: 0:27:58 speed: 11,744 (11,808) K/sec
[root@app1 drbd.d]#
8. 创建文件系统
文件系统的挂载只能在Primary节点进行，只有在设置了主节点后才能对drbd设备进行格式化, 格式化与手动挂载测试。
[root@app1 ~]# mkfs.ext4 /dev/drbd0
[root@app1 ~]# mount /dev/drbd0 /data
三、安装配置NFS
1. app1,app2节点配置nfs
# vi /etc/exports
/data 192.168.0.0/24(rw,no_root_squash)
2. app1,app2节点配置nfs
# service rpcbind start
# service nfs start
# chkconfig rpcbind on
# chkconfig nfs on
四、corosync+pacemaker
1. app1,app2配置安装corosync pacemaker
# yum install corosync pacemaker -y
2. app1,app2安装crmsh
RHEL自6.4起不再提供集群的命令行配置工具crmsh，要实现对集群资源管理，还需要独立安装crmsh。
crmsh的rpm安装可从如下地址下载：http://download.opensuse.org/repositories/network:/ha-clustering:/Stable/CentOS_CentOS-6/
[root@app1 crm]# yum install python-dateutil -y
说明：python-pssh、pssh依懒于python-dateutil包
[root@app1 crm]# rpm -ivh pssh-2.3.1-4.2.x86_64.rpm python-pssh-2.3.1-4.2.x86_64.rpm crmsh-2.1-1.6.x86_64.rpm
warning: pssh-2.3.1-4.2.x86_64.rpm: Header V3 RSA/SHA1 Signature, key ID 17280ddf: NOKEY
Preparing... ########################################### [100%]
1:python-pssh ########################################### [ 33%]
2:pssh ########################################### [ 67%]
3:crmsh ########################################### [100%]
[root@app1 crm]#
[root@app1 crm]#
3. 创建corosync配置文件，app1,app2一样。
cd /etc/corosync/
cp corosync.conf.example corosync.conf
vi /etc/corosync/corosync.conf
# Please read the corosync.conf.5 manual page
compatibility: whitetank
totem {
version: 2
secauth: on
threads: 0
interface {
ringnumber: 0
bindnetaddr: 10.10.10.0
mcastaddr: 226.94.8.8
mcastport: 5405
ttl: 1
}
}
logging {
fileline: off
to_stderr: no
to_logfile: yes
to_syslog: no
logfile: /var/log/cluster/corosync.log
debug: off
timestamp: on
logger_subsys {
subsys: AMF
debug: off
}
}
amf {
mode: disabled
}
service {
ver: 1
name: pacemaker
}
aisexec {
user: root
group: root
}
4. 创建认证文件，app1,app2一样
各节点之间通信需要安全认证，需要安全密钥，生成后会自动保存至当前目录下，命名为authkey,权限为400。
[root@app1 corosync]# corosync-keygen
Corosync Cluster Engine Authentication key generator.
Gathering 1024 bits for key from /dev/random.
Press keys on your keyboard to generate entropy.
Press keys on your keyboard to generate entropy (bits = 128).
Press keys on your keyboard to generate entropy (bits = 192).
Press keys on your keyboard to generate entropy (bits = 256).
Press keys on your keyboard to generate entropy (bits = 320).
Press keys on your keyboard to generate entropy (bits = 384).
Press keys on your keyboard to generate entropy (bits = 448).
Press keys on your keyboard to generate entropy (bits = 512).
Press keys on your keyboard to generate entropy (bits = 576).
Press keys on your keyboard to generate entropy (bits = 640).
Press keys on your keyboard to generate entropy (bits = 704).
Press keys on your keyboard to generate entropy (bits = 768).
Press keys on your keyboard to generate entropy (bits = 832).
Press keys on your keyboard to generate entropy (bits = 896).
Press keys on your keyboard to generate entropy (bits = 960).
Writing corosync key to /etc/corosync/authkey.
[root@app1 corosync]#
5. 将刚才配置的两个文件同步至app2
# scp authkeys corosync.conf root@app2:/etc/corosync/
6. 启动corosync\pacemaker服务，测试能否正常提供服务
节点1:
[root@app1 ~]# service corosync start
Starting Corosync Cluster Engine (corosync): [OK]
[root@app1 ~]# service pacemaker start
Starting Pacemaker Cluster Manager [OK]
配置服务开机自启动：
chkconfig corosync on
chkconfig pacemaker on
节点2:
[root@app2 ~]# service corosync start
Starting Corosync Cluster Engine (corosync): [OK]
[root@app1 ~]# service pacemaker start
Starting Pacemaker Cluster Manager [OK]
配置服务开机自启动：
chkconfig corosync on
chkconfig pacemaker on
7. 测试corosync,pacemaker,crmsh安装情况
(1) 查看节点情况
[root@app1 ~]# crm status
Last updated: Tue Jan 26 13:13:19 2016
Last change: Mon Jan 25 17:46:04 2016 via cibadmin on app1
Stack: classic openais (with plugin)
Current DC: app1 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
0 Resources configured
Online: [ app1 app2 ]
(2) 查看端口启动情况
# netstat -tunlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
udp 0 0 10.10.10.25:5404 0.0.0.0:* 2828/corosync
udp 0 0 10.10.10.25:5405 0.0.0.0:* 2828/corosync
udp 0 0 226.94.8.8:5405 0.0.0.0:* 2828/corosync
(3) 查看日志
[root@app1 corosync]# tail -f /var/log/cluster/corosync.log
可以查看日志中关键信息：
Jan 23 16:09:30 corosync [MAIN ] Corosync Cluster Engine ('1.4.7'): started and ready to provide service.
Jan 23 16:09:30 corosync [MAIN ] Successfully read main configuration file '/etc/corosync/corosync.conf'.
....
Jan 23 16:09:30 corosync [TOTEM ] Initializing transmit/receive security: libtomcrypt SOBER128/SHA1HMAC (mode 0).
Jan 23 16:09:31 corosync [TOTEM ] The network interface [10.10.10.24] is now up.
Jan 23 16:09:31 corosync [TOTEM ] A processor joined or left the membership and a new membership was formed.
Jan 23 16:09:48 corosync [TOTEM ] A processor joined or left the membership and a new membership was formed.
[root@app1 corosync]#
五、配置pacemaker
1. 基本配置
corosync默认启用了stonith功能，而我们要配置的集群并没有stonith设备，因此在配置集群的全局属性时要对其禁用。
# crm
crm(live)# configure ##进入配置模式
crm(live)configure# property stonith-enabled=false ##禁用stonith设备
crm(live)configure# property no-quorum-policy=ignore ##不具备法定票数时采取的动作
crm(live)configure# rsc_defaults resource-stickiness=100 ##设置默认的资源黏性，只对当前节点有效。
crm(live)configure# verify ##校验
crm(live)configure# commit ##校验没有错误再提交
crm(live)configure# show ##查看当前配置
node app1
node app2
property cib-bootstrap-options: \
dc-version=1.1.11-97629de \
cluster-infrastructure="classic openais (with plugin)" \
expected-quorum-votes=2 \
stonith-enabled=false \
default-resource-stickiness=100 \
no-quorum-policy=ignore
或:
# crm configure property stonith-enabled=false
# crm configure property no-quorum-policy=ignore
# crm configure property default-resource-stickiness=100
2. 资源配置
#命令使用经验说明：verify报错的，可以直接退出，也可以采用edit编辑，修改正确为止。
# crm configure edit 可以直接编辑配置文件
(1) 添加VIP
不要单个资源提交，等所有资源及约束一起建立之后提交。
crm(live)configure# primitive vip ocf:heartbeat:IPaddr params ip=192.168.0.26 cidr_netmask=24 nic=eth0:1 op monitor interval=30s timeout=20s on-fail=restart
crm(live)configure# verify #验证一下参数是否正确
说明:
primitive :定义资源命令
myip :资源ID名，可自行定义
ocf:heartbeat:IPaddr :资源代理(RA)
params ip=192.168.0.26 :定义VIP
op monitor :监控该资源
interval=30s :间隔时间
timeout=20s :超时时间
on-fail=restart :如服务非正常关闭，让其重启，如重启不了，再转移至其他节点
(2) 添加drdb服务
crm(live)configure# primitive mydrbd ocf:linbit:drbd params drbd_resource=data op monitor role=Master interval=20 timeout=30 op monitor role=Slave interval=30 timeout=30 op start timeout=240 op stop timeout=100
crm(live)configure# verify
把drbd设为主从资源：
crm(live)configure# ms ms_mydrbd mydrbd meta master-max=1 master-node-max=1 clone-max=2 clone-node-max=1 notify=true
crm(live)configure# verify
(3) 文件系统挂载服务：
crm(live)configure# primitive mystore ocf:heartbeat:Filesystem params device=/dev/drbd0 directory=/data fstype=ext4 op start timeout=60s op stop timeout=60s op monitor interval=30s timeout=40s on-fail=restart
crm(live)configure# verify
(3) 创建约束,很关键，VIP，DRBD, 目录挂载均在一台节点上，而且VIP，目录挂载均依懒于主DRBD.
创建组资源，vip与mystore一起。
crm(live)configure# group g_service vip mystore
crm(live)configure# verify
创建位置约束，组资源的启动依懒于drbd主节点
crm(live)configure# colocation c_g_service inf: g_service ms_mydrbd:Master
创建位置约整，mystore存储挂载依赖于drbd主节点
crm(live)configure# colocation mystore_with_drbd_master inf: mystore ms_mydrbd:Master
启动顺序依懒，drbd启动后，创建g_service组资源
crm(live)configure# order o_g_service inf: ms_mydrbd:promote g_service:start
crm(live)configure# verify
crm(live)configure# commit
3. 配置完成后，查看状态
[root@app1 ~]# crm status
Last updated: Mon Jan 25 22:24:55 2016
Last change: Mon Jan 25 22:24:46 2016
Stack: classic openais (with plugin)
Current DC: app2 - partition with quorum
Version: 1.1.11-97629de
2 Nodes configured, 2 expected votes
4 Resources configured
Online: [ app1 app2 ]
Master/Slave Set: ms_mydrbd [mydrbd]
Masters: [ app1 ]
Slaves: [ app2 ]
Resource Group: g_service
vip (ocf::heartbeat:IPaddr): Started app1
mystore (ocf::heartbeat:Filesystem): Started app1
[root@app1 ~]#
#说明：切换测试时有时会出现警告提示，影响真实状态查看，可以采用如下方式清除，提示哪个资源报警就清哪个，清理后，再次crm status查看状态显示正常。
Failed actions:
mystore_stop_0 on app1 'unknown error' (1): call=97, status=complete, last-rc-change='Tue Jan 26 14:39:21 2016', queued=6390ms, exec=0ms
[root@app1 ~]# crm resource cleanup mystore
Cleaning up mystore on app1
Cleaning up mystore on app2
Waiting for 2 replies from the CRMd.. OK
[root@app1 ~]#
(1) 查看DRBD挂载目录
[root@app2 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_app2-lv_root
35G 3.7G 30G 11% /
tmpfs 497M 45M 452M 10% /dev/shm
/dev/sda1 477M 34M 418M 8% /boot
192.168.1.26:/data 20G 44M 19G 1% /mnt
/dev/drbd0 20G 44M 19G 1% /data
[root@app2 ~]#
(2) 查看DRBD主备情况
[root@app2 ~]# cat /proc/drbd
version: 8.4.5 (api:1/proto:86-101)
GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96 build by [email protected], 2015-01-02 12:06:20
0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
ns:20484 nr:336 dw:468 dr:21757 al:4 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0
[root@app1 ~]# cat /proc/drbd
version: 8.4.5 (api:1/proto:86-101)
GIT-hash: 1d360bde0e095d495786eaeb2a1ac76888e4db96 build by [email protected], 2015-01-02 12:06:20
0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
ns:0 nr:20484 dw:20484 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:0
(3) NFS客户端挂载读写正常
[root@vm15 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 21G 4.6G 15G 24% /
/dev/sda1 99M 23M 72M 25% /boot
tmpfs 7.4G 0 7.4G 0% /dev/shm
/dev/mapper/vg-data 79G 71G 4.2G 95% /data
192.168.0.26:/data/ 5.0G 138M 4.6G 3% /mnt
[root@vm15 ~]#
[root@vm15 ~]#
[root@vm15 ~]# cd /mnt
[root@vm15 mnt]# ls
abc.txt lost+found
[root@vm15 mnt]# cp abc.txt a.txt
[root@vm15 mnt]#
[root@vm15 mnt]#
[root@vm15 mnt]# ls
a.txt abc.txt lost+found
[root@vm15 mnt]#
[root@vm15 mnt]#
[root@vm15 mnt]#
4. 关机节点1测试
(1) 关闭app1节点，资源全都在节点2启动
[root@app2 ~]# crm status
Last updated: Tue Jan 26 13:31:54 2016
Last change: Tue Jan 26 13:30:21 2016 via cibadmin on app1
Stack: classic openais (with plugin)
Current DC: app2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
4 Resources configured
Online: [ app2 ]
OFFLINE: [ app1 ]
Master/Slave Set: ms_mydrbd [mydrbd]
Masters: [ app2 ]
Stopped: [ app1 ]
Resource Group: g_service
vip (ocf::heartbeat:IPaddr): Started app2
mystore (ocf::heartbeat:Filesystem): Started app2
[root@app2 ~]#
(2) 磁盘目录挂载成功
[root@app2 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_app2-lv_root 36G 3.7G 30G 11% /
tmpfs 1004M 44M 960M 5% /dev/shm
/dev/sda1 485M 39M 421M 9% /boot
/dev/drbd0 5.0G 138M 4.6G 3% /data
[root@app2 ~]#
(3) DRBD也切换成了主节点：
[root@app2 ~]# cat /proc/drbd
version: 8.4.3 (api:1/proto:86-101)
GIT-hash: 89a294209144b68adb3ee85a73221f964d3ee515 build by gardner@, 2013-11-29 12:28:00
0: cs:WFConnection ro:Primary/Unknown ds:UpToDate/DUnknown C r-----
ns:0 nr:144 dw:148 dr:689 al:1 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:d oos:4
[root@app2 ~]#
节点1启动后，可以直接加入，资源也无需要再次切换。
5. 节点切换测试
# crm node standby app2 #app2离线
查看资源，节点资源直接切换到app1上面，还是重启效果好。
[root@app1 ~]# crm status
Last updated: Tue Jan 26 14:30:05 2016
Last change: Tue Jan 26 14:29:59 2016 via crm_attribute on app2
Stack: classic openais (with plugin)
Current DC: app2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
4 Resources configured
Node app2: standby
Online: [ app1 ]
Master/Slave Set: ms_mydrbd [mydrbd]
Masters: [ app1 ]
Stopped: [ app2 ]
Resource Group: g_service
vip (ocf::heartbeat:IPaddr): Started app1
mystore (ocf::heartbeat:Filesystem): Started app1
[root@app1 ~]#
6. 配置stonith,之前配置是关闭的，这里补充一下主要测试功能，实现环境中例如IBM x系列服务器可以采用ipmi等stonith设备配置。
本文采用VMware ESXi5.1虚拟机，stonith也是采用VMware ESXi的fence设备fence_vmware_soap
注：在测试corosync+pacemaker过程中出现无法快速reboot/shutdown.stonith对一些服务器无法重启时配置该操作很有用。
需要在app1,app2安装fence-agents安装包。
# yum install fence-agents
安装之后位置以及stonith测试功能
[root@app1 ~]# /usr/sbin/fence_vmware_soap -a 192.168.0.61 -z -l root -p 876543 -o list
...
...
DRBD_HEARTBEAT_APP1,564d09c3-e8ee-9a01-e5f4-f1b11f03c810
DRBD_HEARTBEAT_APP2,564dddb8-f4bf-40e6-dbad-9b97b97d3d25
...
...
例如：重启虚拟机：
[root@app1 ~]# /usr/sbin/fence_vmware_soap -a 192.168.0.61 -z -l root -p 876543 -n DRBD_HEARTBEAT_APP2 -o reboot
[root@app1 ~]# crm
crm(live)# configure
crm(live)configure# primitive vm-fence-app1 stonith:fence_vmware_soap params ipaddr=192.168.0.61 login=root passwd=876543 port=app1 ssl="1" pcmk_host_list="DRBD_HEARTBEAT_APP1" retry_on="10" shell_timeout="120" login_timeout="120" action="reboot" op start interval="0" timeout="120"
crm(live)configure# primitive vm-fence-app2 stonith:fence_vmware_soap params ipaddr=192.168.0.61 login=root passwd=876543 port=app2 ssl="1" pcmk_host_list="DRBD_HEARTBEAT_APP2" retry_on="10" shell_timeout="120" login_timeout="120" action="reboot" op start interval="0" timeout="120"
crm(live)configure# location l-vm-fence-app1 vm-fence-app1 -inf: app1
crm(live)configure# location l-vm-fence-app2 vm-fence-app2 -inf: app2
crm(live)configure# property stonith-enabled=true
crm(live)configure# verify
crm(live)configure# commit
[root@app1 ~]# crm status
Last updated: Tue Jan 26 16:50:53 2016
Last change: Tue Jan 26 16:50:27 2016 via crmd on app2
Stack: classic openais (with plugin)
Current DC: app2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
6 Resources configured
Online: [ app1 app2 ]
Master/Slave Set: ms_mydrbd [mydrbd]
Masters: [ app2 ]
Slaves: [ app1 ]
Resource Group: g_service
vip (ocf::heartbeat:IPaddr): Started app2
mystore (ocf::heartbeat:Filesystem): Started app2
vm-fence-app1 (stonith:fence_vmware_soap): Started app2
vm-fence-app2 (stonith:fence_vmware_soap): Started app1
查看整个配置文件：
[root@app1 ~]# crm
crm(live)# configure
crm(live)configure# show xml
清空资源，重新配置操作方法：
[root@app2 ~]# crm status
Last updated: Wed Jan 27 10:39:24 2016
Last change: Tue Jan 26 16:50:27 2016 via crmd on app2
Stack: classic openais (with plugin)
Current DC: app2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
6 Resources configured
Online: [ app1 app2 ]
Master/Slave Set: ms_mydrbd [mydrbd]
Masters: [ app2 ]
Slaves: [ app1 ]
Resource Group: g_service
vip (ocf::heartbeat:IPaddr): Started app2
mystore (ocf::heartbeat:Filesystem): Started app2
vm-fence-app1 (stonith:fence_vmware_soap): Started app2
vm-fence-app2 (stonith:fence_vmware_soap): Started app1
[root@app2 ~]#
先依次关闭资源 ：
[root@app2 ~]#
[root@app2 ~]# crm resource stop vm-fence-app2
[root@app2 ~]# crm resource stop vm-fence-app1
[root@app2 ~]# crm resource stop mystore
[root@app2 ~]# crm resource stop vip
[root@app2 ~]# crm resource stop ms_mydrbd
[root@app2 ~]# crm status
Last updated: Wed Jan 27 10:40:28 2016
Last change: Wed Jan 27 10:40:23 2016 via cibadmin on app2
Stack: classic openais (with plugin)
Current DC: app2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
6 Resources configured
Online: [ app1 app2 ]
[root@app2 ~]#
再清空配置：
[root@app2 ~]# crm configure erase
INFO: resource references in colocation:c_g_service updated
INFO: resource references in colocation:mystore_with_drbd_master updated
INFO: resource references in order:o_g_service updated
[root@app2 ~]#
[root@app2 ~]#
[root@app2 ~]# crm status
Last updated: Wed Jan 27 10:40:58 2016
Last change: Wed Jan 27 10:40:52 2016 via crmd on app2
Stack: classic openais (with plugin)
Current DC: app2 - partition with quorum
Version: 1.1.10-14.el6-368c726
2 Nodes configured, 2 expected votes
0 Resources configured
Online: [ app1 app2 ]
[root@app2 ~]#
[root@app2 ~]#
就可以再次重新配置了。
8. 配置小结：
之前多次未成功配置的成功主要在于资源的排列与定位启动上面，造成切换，启动均不成功，这个也是corosync+pacemaker的配置要理解的重点, DRBD+可以实现很多种组合，本文仅提供技术实现参考。