配置crmsh的yum仓库，此仓库的RPM包有openSUSE提供，将这个network:ha-clustering:Stable.repo文件直接下载到本地并且命名为crmsh.repo
wget -O /etc/yum.repos.d/crmsh.repo http://download.opensuse.org/repositories/network:/ha-clustering:/Stable/CentOS_CentOS-7/network:ha-clustering:Stable.repo yum repolist yum install -y crmsh
crmsh是pacemaker的命令行接口工具，执行help命令，可以查看shell接口所有的一级命令和二级命令，使用cd 可以切换到二级子命令的目录中去，可以执行二级子命令
在集群中的资源有四类：primitive主资源、group组资源、clone克隆资源、ms/master主从资源
在集群中的约束有三种：
①：location位置约束：资源间的依赖/互斥性，定义资源是否运行在同一节点上。score，正值表示要运行在同一节点上，负值则不可。 ②：colocation排列约束：每个节点都有一个score值，正值则倾向于本节点，负值倾向于其他节点，所有节点score比较，倾向于最大值的节点。 ③：order顺序约束：定义资源执行动作的次序，例如vip应先配置，httpd服务后配置。特殊的score值，-inf 负无穷，inf 正无穷。
常用指令介绍：
crm(live)# help
Help overview for crmsh
Available topics:(可用主题)
Overview Help overview for crmsh Topics Available topics Description Program description CommandLine Command line options Introduction Introduction Interface User interface Completion Tab completion Shorthand Shorthand syntax Features Features Shadows Shadow CIB usage Checks Configuration semantic checks Templates Configuration templates Testing Resource testing Security Access Control Lists (ACL) Resourcesets Syntax: Resource sets AttributeListReferences Syntax: Attribute list references AttributeReferences Syntax: Attribute references RuleExpressions Syntax: Rule expressions Reference Command reference
Available commands:(可用命令)
cd 切换命令层级，例如 cd cluster：切换到cluster二级命令
help 查看帮助
ls 列出命令层级和命令
quit 退出
report 报告
status 查看集群状态，可以有参数 help status 可以查看
up 回到上一个命令层级
verify 验证集群状态
assist/ Configuration assistant 配置集群代理
template Create template for primitives
weak-bond Create a weak bond between resources
cib/ CIB shadow management
cibstatus CIB status management and editing (CIB状态管理和编辑)
commit Copy a shadow CIB to the cluster (将影子CIB复制到集群)
delete Delete a shadow CIB (删除阴影CIB)
diff Diff between the shadow CIB and the live CIB (阴影CIB和活动CIB的区别)
import Import a CIB or PE input file to a shadow (将CIB或PE输入文件导入到阴影中)
list List all shadow CIBs (列出所有阴影CIB)
new Create a new shadow CIB (创建一个新的CIB)
reset Copy live cib to a shadow CIB (将活动CIB复制到影子CIB)
use Change working CIB (改变工作CIB)
cibstatus/ CIB status management and editing
load Load the CIB status section
node Change node status
op Edit outcome of a resource operation
origin Display origin of the CIB status section
quorum Set the quorum
run Run policy engine
save Save the CIB status section
show Show CIB status section
simulate Simulate cluster transition
ticket Manage tickets
cluster/ Cluster setup and management （重要）
add 给集群添加节点
copy 拷贝文件到另外一个集群的节点
diff Diff file across cluster
geo_init Configure cluster as geo cluster
geo_init_arbitrator Initialize node as geo cluster arbitrator
geo_join Join cluster to existing geo cluster
health 集群的健康状态检查
init 初始化集群
join 加入到已经存在的集群
remove 从集群中移除一个节点
run 在所有集群节点执行一条命令
start 启动集群服务
status 集群状态检查
stop 停止集群服务
wait_for_startup Wait for cluster to start
configure/ CIB configuration cib 集群配置（很重要，最重要的命令用中文注释了）
acl_target Define target access rights
alert Event-driven alerts
cib CIB shadow management
cibstatus CIB status management and editing
clone 定义克隆资源
colocation 设置排列约束
commit Commit the changes to the CIB
default-timeouts Set timeouts for operations to minimums from the meta-data
delete Delete CIB objects
edit 编辑集群配置文件，cib文件
erase Erase the CIB
fencing_topology Node fencing order
filter Filter CIB objects
get_property Get property value
graph Generate a directed graph
group 定义组资源
load Import the CIB from a file
location 设置位置约束
modgroup Modify group
monitor Add monitor operation to a primitive
ms 定义主从资源
node Define a cluster node
op_defaults Set resource operations defaults
order 设置顺序约束
primitive 定义主资源
property 设置集群的属性
ptest Show cluster actions if changes were committed
refresh Refresh from CIB
rename Rename a CIB object
role Define role access rights
rsc_defaults Set resource defaults
rsc_template Define a resource template
rsc_ticket Resources ticket dependency
rsctest Test resources as currently configured
save Save the CIB to a file
schema Set or display current CIB RNG schema
set Set an attribute value
show Display CIB objects
tag Define resource tags
template Edit and import a configuration from a template
upgrade Upgrade the CIB
user Define user access rights
validate-all Help for command validate-all
validate_all Call agent validate-all for resource
verify Verify the CIB with crm_verify
xml Raw xml
corosync/ Corosync management Corosync的管理
add-node Add a corosync node
del-node Remove a corosync node
diff Diffs the corosync configuration
edit Edit the corosync configuration
get Get a corosync configuration value
log Show the corosync log file
pull Pulls the corosync configuration
push Push the corosync configuration
reload Reload the corosync configuration
set Set a corosync configuration value
show Display the corosync configuration
status Display the corosync status
history/ Cluster history 设置集群的历史信息
detail Set the level of detail shown
diff Cluster states/transitions difference
events Show events in log
exclude Exclude log messages
graph Generate a directed graph from the PE file
info Cluster information summary
latest Show latest news from the cluster
limit Limit timeframe to be examined
log Log content
node Node events
peinputs List or get PE input files
refresh Refresh live report
resource Resource events
session Manage history sessions
setnodes Set the list of cluster nodes
show Show status or configuration of the PE input file
source Set source to be examined
transition Show transition
transitions List transitions
wdiff Cluster states/transitions difference
maintenance/ Maintenance mode commands 维护模式的命令
action Invoke a resource action
off Disable maintenance mode
on Enable maintenance mode
node/ Node management 节点管理（很重要）
attribute 管理、查看节点属性
clearstate Clear node state
delete 删除节点
fence Fence 一个节点
maintenance Put node into maintenance mode
online 让节点上线, 例如：node online node2
ready Put node into ready mode
server Show node hostname or server address
show 查看集群中的节点
standby 让一个节点standy，例如：node standby node1
status 查看集群中节点的状态
status-attr 管理集群中节点的属性
utilization Manage utilization attributes
options/ User preferences
add-quotes Add quotes around parameters containing spaces
check-frequency When to perform semantic check
check-mode How to treat semantic errors
colorscheme Set colors for output
editor Set preferred editor program
manage-children How to handle children resource attributes
output Set output type
pager Set preferred pager program
reset Reset user preferences to factory defaults
save Save the user preferences to the rc file
set Set the value of a given option
show Show current user preference
skill-level Set skill level
sort-elements Sort CIB elements
user Set the cluster user
wait Synchronous operation
ra/ 资源代理管理操作（很重要）
classes 列出资源类别和提供者，例如：ra classes
info 查看脚本的使用方法，例如：ra info IPaddr2
list 列出一个类别中有多少可用的资源代理，例如：ra list lsb 或 ra list ocf
providers 查看特定资源代理有哪个提供者提供，例如：ra providers IPaddr2
validate Validate parameters for RA
resource/ Resource management 资源管理（重要）
ban Ban a resource from a node
cleanup Cleanup resource status
clear Clear any relocation constraint
constraints Show constraints affecting a resource
demote Demote a master-slave resource
failcount Manage failcounts
locate Show the location of resources
maintenance Enable/disable per-resource maintenance mode
manage Put a resource into managed mode
meta Manage a meta attribute
move 将某个资源迁移到哪个节点上去
operations Show active resource operations
param Manage a parameter of a resource
promote Promote a master-slave resource
refresh Refresh CIB from the LRM status
reprobe Probe for resources not started by the CRM
restart Restart resources
scores Display resource scores
secret Manage sensitive parameters
start Start resources
status Show status of resources
stop Stop resources
trace Start RA tracing
unmanage Put a resource into unmanaged mode
untrace Stop RA tracing
utilization Manage a utilization attribute
script/ Cluster script management
json JSON API for cluster scripts
list List available scripts
run Run the script
show Describe the script
verify Verify the script
site/ GEO clustering site support
ticket Manage site tickets
template/ Edit and import a configuration from a template
apply Process and apply the current configuration to the current CIB
delete Delete a configuration
edit Edit a configuration
list List configurations/templates
load Load a configuration
new Create a new configuration from templates
show Show the processed configuration