Corosync+pacemaker's Crmsh CRM example

Corosync and pacemaker implementation of the high availability of the difficulties in the CRM command, subcommand, more parameters, and so on, the following some common examples.
One, CRM has two kinds of working methods

1, batch mode, which is to enter commands directly on the shell command line
2, interactive mode (CRM (live) #) enters into Crmsh for interactive execution

Second, the order detailed

1, First ORDER subcommand

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[Root@node1 corosync]# CRM CRM (live) # Help This is the CRM shell, a Pacemaker command line interface. Available commands: CIB manage Shadow CIBs//CIB sand Box Resource resource management//All resources are defined after this sub command Configure CRM cluster configuration//Edit cluster configuration information Node nodes management//cluster Nodes admin subcommand Options user Preferences//Priority History CRM Cluster history//Command history Site Geo-cluster Support RA Resource Agents Information Center/resource Agent subcommand (all processes associated with the resource agent are under this command) Status Show cluster status//display current cluster state information Help, huh? Show Help (Help topics for List of topics)//view possible commands for the current zone End,cd,up go back one level//return to First Class CRM (live) Quit,bye,exit exit the program//Exit CRM (live) Interactive mode

2,resource Resource State CONTROL subcommand

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CRM (live) resource# help vailable commands: Status Show status in Resources//display resource status information Start start a resource/a resource Stop stop a resource/a resource Restart restart a resource/reboot a resource promote promote a master-slave resource//promotion of a master-slave resource Demote demote a Master-slave resource//demote a master-slave resource Manage put a resource into managed mode//Add a resource to admin mode Unmanage put a resource into unmanaged mode/remove a resource from admin mode Migrate migrate a resource to another node//migrate resources to another node Unmigrate Unmigrate A resource to another node Param manage a parameter of a resource//management resource parameters Secret Manage sensitive parameters//management of sensitive parameters Meta manage a meta attribute//Manage Source Properties Utilization Manage a Utilization attribute Failcount Manage failcounts//Management failure counters Cleanup Cleanup Resource status//cleanup resource status Refresh Refresh CIB from the LRM status//Update CIB (cluster information Base) from LRM (LRM Local resource management), in Reprobe probe for resource not started by the CRM//probing resources that are not started in CRM Trace start RA tracing//Enable Resource Agent (RA) tracking Untrace Stop RA Tracing//Disable resource Agent (RA) tracking Help topics for List of topics//Display assistance End went back one level//Return (CRM (live) #) Quit exit the program//Exit Interactive

3,configure Resource Definition Child command

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CRM (live) configure# help Available commands: Node define a cluster node//define a cluster nodes Primitive define a resource//define Resources Monitor add monitor operation to a primitive//Add monitoring options to a resource (such as timeout, operation after startup failure) Group define a groups//define a set type (combine multiple resources) Clone define a clones//defines a clone type (you can set the total number of clones, and several clones can be run on each node) Ms Define a Master-slave resource//define a master-slave type (nodes within a cluster can only have one running master resource, others from the standby) Rsc_template Define a resource template//define a resource template Location a location preference//defines the position constraint precedence (the default is run on that node (if the value of the position constraint is the same, the default bias is high, run on that node)) colocation colocate Resources//Routing constraints (possibility of multiple resources together) Order of resources//resource start sequence Rsc_ticket Resources Ticket Dependency Property set a cluster//set cluster properties Rsc_defaults Set resource defaults//Set resource default properties (sticky) Fencing_topology node Fencing order//Isolation nodes sequence Role define roles access rights//define the access rights of the persona User define user access rights//define access rights with users Op_defaults Set Resource Operations defaults//Set resource default options Schema set or display current CIB RNG schema Show display CIB objects//display cluster information base on Edit edit CIB objects//Edit the Cluster info object (VIM mode edit) Filter filter CIB objects//Filter CIB objects Delete Delete CIB objects//Delete CIB object Default-timeouts set timeouts for operations to minimums from the Meta-data Rename Rename a CIB object//Rename CIB objects Modgroup Modify Group//Change resource groups Refresh Refresh from CIB//re-read CIB information Erase erase the CIB/clear CIB information Ptest Show cluster actions if changes were committed Rsctest test resources as currently configured CIB CIB Shadow Management Cibstatus CIB status Management and editing//CIB state management and editing Template Edit and import a configuration from a template//edit or import configuration template Commit the changes to the CIB//submit the changed information to the write CIB Verify verify the CIB with crm_verify//CIB syntax validation Upgrade Upgrade the CIB to version 1.0//upgrade CIB to 1.0 Save Save the CIB to a file//export the current CIB to a document (a directory where the exported file exists before switching CRM) Load Import the CIB from a file//load from the contents of the CIB Graph generate a directed graph XML RAW XML Help topics for List of topics//Display assistance information End goes back one level//return to first tier (CRM (live) #) Quit exit the program//exit CRM Interactive mode

4,node Node Admin subcommand

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CRM (live) # node CRM (live) node# help Node Management and Status commands. Available commands: Status Show nodes status as XML//Display node state information in XML format Show shows node//command line format displays nodes state information Standby put node into standby//simulate the specified node offline (standby must be followed by the FQDN) Online set node online//node back online Maintenance put node into maintenance Mode///Change one node state to maintenance Ready put node into ready mode///Change one node state to ready Fence Fence node//Isolation Nodes Clearstate Clear Node state//Cleanup nodes status information Delete Delete node//delete one of the nodes Attribute Manage attributes Utilization Manage Utilization attributes Status-attr Manage Status Attributes Help topics for List of topics End goes back one level//return to last time Quit exit the program//exit

5,ra Resource Agent Child command

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CRM (live) # RA CRM (live) ra# help Available commands: Classes list classes and providers//resource agent classification The list list RA for a class (and provider)//shows the resources provided in a category Meta show meta-data for a RA//display available parameters for a resource agent order (such as Meta OCF:HEARTBEAT:IPADDR2) Providers show providers for a RA and a class Help topics for List of topics End down one level Quit exit the program

Third, the example
1, System resources view

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Resource agents used by the CRM (live) ra# classes//System Lsb Ocf/heartbeat Pacemaker Service Stonith

2, the default system resource list

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CRM (Live) ra# list OCF//list default system resources Ctdb Clustermon Delay Dummy filesystem healthcpu IPAddr IPaddr2 ipsrcaddr healthcpu healthsmart HealthSmart LVM MailTo Route Sendarp Squid Stateful sysinfo systemhealth Virtualdomain Xinetd Apache CONNTRACKD controld DB2 DHCPD Ethmonitor exportfs Iscsilogicalunit MySQL named Nfsnotify nfsserver pgsql Ping Pingd Postfix remote RSYNCD symlink Tomcat

3, view the additional system resources

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CRM (Live) ra# list LSB//list Plus system resources NetworkManager abrt-ccpp abrt-oops ABRTD acpid ATD AUDITD AutoFS blk-availability Certmonger Corosync corosync-notifyd cpuspeed Crond Cups DNSMASQ firstboot Haldaemon Halt hsqldb Ip6tables iptables irqbalance jexec kdump Killall Lvm2-lvmetad lvm2-monitor mdmonitor Messagebus MYSQLD netconsole Netfs Network NFS Nfslock nginx NMB ntpd ntpdate ODDJOBD OpenFire Pacemaker PHP-FPM Portreserve Postfix psacct quota_nld Rdisc Redis Restorecond rngd rpcbind RPCGSSD RPCIDMAPD RPCSVCGSSD Rsyslog Sandbox SASLAUTHD single SLAPD SMARTD SMB snmpd SNMPTRAPD Spice-vdagentd sshd SSSD Sysstat udev-post VSFTPD Wdaemon winbind wpa_supplicant ypbind

4, view the parameters of system resources

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CRM (Live) ra# meta ocf:heartbeat:IPaddr//view parameters for system resource IPAddr Manages virtual IPv4 and IPV6 addresses (Linux specific version) (OCF:HEARTBEAT:IPADDR) This linux-specific resource manages IP alias IP addresses. It can add an IP alias, or remove one. In addition, it can implement Cluster Alias IP functionality If invoked as a clone resource. If used as a clone, you should explicitly set Clone-node-max >= 2, and/or Clone-max < number of nodes. In the case of node failure, Clone instances need to is re-allocated on surviving nodes. This would isn't to possible if there is already a instance on those nodes, and Clone-node-max=1 (which is the default). Parameters (*: Required, []: Default): Ip* (String): IPv4 or IPV6 address The IPv4 (dotted quad notation) or IPV6 address (colon hexadecimal notation) Example IPv4 "192.168.1.1". Example IPv6 "2001:db8:dc28:0:0:fc57:d4c8:1fff". 。。。。。。。。。。。。。。。。。。。 Omitted........................

5, Property modification

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CRM (Live) configure# property Stonith-enabled=false//Disabled stonith-enable CRM (Live) configure# property No-quorum-policy=ignore//Ignore voting rules

6, define the command used by a resource

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/** * Primitive: Defines the command used for a resource * Webip: A name for the resource * OCF:HEARTBEAT;IPADDR: The type of resource agent used, by whom the agent provided * OP Monitor to monitor Webip * Interval: Time interval * Timeout: Timeout time * On-fail: Failed from the beginning */ CRM (Live) configure# primitive Webip ocf:heartbeat:IPaddr params ip=192.168.10.130 op monitor interval=30s timeout=20s On-fail=restart CRM (Live) configure# primitive nginx_res Lsb:nginx//The scripts in/etc/init.d/* are the LSB The parameters behind the params can be found by using meta commands, and different system resource parameters are not the same.

7, defining an arrangement constraint

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/** * Define an arrangement constraint * colocation: Arranging constraint commands * Nginx_web: Constraint name * inf:# (possibility, INF means permanent together, can also be numeric) * Webip Nginx_res: #资源名称 */ CRM (Live) configure# colocation nginx_web inf:nginx_res Webip

8, define resource start order

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/** * Define resource start order * Order: Commands for sequential constraints * NGINX_AFTER_IP: Constraint ID * Mandatory: #指定级别 (There are three levels: mandatory: Mandatory, Optional: Optional, Serialize: Serialization) * Webip nginx_res: #资源名称, the sequence of writing here is very important */ CRM (Live) configure# order nginx_after_ip Mandatory:webip Nginx_res

9, define node weights

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/** * Define node weights * Location: Node weight command * Webip_and_webnfs_and_webserver: Constraint name * Webip 500:node1:webip The weight of the Node1 node of this resource is 500 */ CRM (Live) configure# location Webip_and_webnfs_and_webserver Webip 500:node1

10, define default resource properties

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/** * Define default resource properties * Rsc_defaults: Default Resource * This defines the default weights that represent each resource in the cluster. Only when the resource service is not in the current node will the weights take effect, for example, I have defined three resources Webip, Webnfs, webserver, the weight of each resource is 100, then add together will become 300, Previously defined node1 of the value of the position constraint is 500, when Node1 down, back online, so switch to Node1 on. */ CRM (Live) configure# rsc_defaults resource-stickiness=100

11, delete the resource or node

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CRM (live) configure# Delete nginx_res//delete a resource, constraint, sort, group, etc CRM (live) node# Delete node1//delete a section

12, other resources

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CRM (Live) configure# Verify//Audit CRM (Live) configure# commit/Submit CRM (Live) configure# Show//display

13, node hangs and online

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crm (live) node # Standby node1  //node hang   CRM (live) node# online node1   //node online