From Ubuntu 23.04 Lunar Lobster onwards pcs is the recommended and supported tool to set up and manage Corosync/Pacemaker clusters in Ubuntu. This is the last Ubuntu release where crmsh will be supported, but not recommended, so users will have time to migrate out of it.
The migration from crmsh to pcs is not that complex since both have a similar CLI. Below one can find a direct mapping of some useful commands from crmsh to pcs.
| Action | crmsh | pcs |
|---|---|---|
| Show configuration (raw XML) | crm configure show xml | pcs cluster cib |
| Show configuration (human-friendly) | crm configure show | pcs config |
| Show cluster status | crm status | pcs status |
| Put a node in standby mode | crm node standby NODE | pcs node standby NODE |
| Remove a node from standby mode | crm node online NODE | pcs node unstandby NODE |
| Set cluster property | crm configure property PROPERTY=VALUE | pcs property set PROPERTY=VALUE |
| List Resource Agent classes | crm ra classes | pcs resource standards |
| List available Resource Agents by standard | crm ra list ocf | pcs resource agents ocf |
| List available Resource Agents by OCF provider | crm ra list ocf pacemaker | pcs resource agents ocf:pacemaker |
| List available Resource Agent parameters | crm ra info AGENT | pcs resource describe AGENT |
| Show available Fence Agent parameters | crm ra info stonith:AGENT | pcs stonith describe AGENT |
| Create a resource | crm configure primitive NAME AGENT params PARAMETERS | pcs resource create NAME AGENT PARAMETERS |
| Show configuration of all resources | crm configure show | pcs resource config |
| Show configuration of one resource | crm configure show RESOURCE | pcs resource config RESOURCE |
| Show configuration of fencing resources | crm resource status | pcs stonith config |
| Start a resource | crm resource start RESOURCE | pcs resource enable RESOURCE |
| Stop a resource | crm resource stop RESOURCE | pcs resource disable RESOURCE |
| Remove a resource | crm configure delete RESOURCE | pcs resource delete RESOURCE |
| Modify a resource’s instance parameters | crm resource param RESOURCE set PARAMETER=VALUE | pcs resource update RESOURCE PARAMETER=VALUE |
| Delete a resource’s instance parameters | crm resource param RESOURCE delete PARAMETER | pcs resource update RESOURCE PARAMETER= |
| List current resource defaults | crm configure show type:rsc_defaults | pcs resource defaults |
| Set resource defaults | crm configure rsc_defaults OPTION=VALUE | pcs resource defaults OPTION=VALUE |
| List current operation defaults | crm configure show type:op_defaults | pcs resource op defaults |
| Set operation defaults | crm configure op_defaults OPTION=VALUE | pcs resource op defaults OPTION=VALUE |
| Clear fail counts for a resource | crm resource cleanup RESOURCE | *pcs resource cleanup * |
| Create a colocation constraint | crm configure colocation NAME INFINITY: RESOURCE_1 RESOURCE_2 | pcs constraint colocation add RESOURCE_1 with RESOURCE_2 INFINITY |
| Create an ordering constraint | crm configure order NAME mandatory: RESOURCE_1 RESOURCE_2 | pcs constraint order RESOURCE_1 then RESOURCE_2 |
| Create a location constraint | crm configure location NAME RESOURCE 50: NODE | pcs constraint location RESOURCE prefers NODE=50 |
| Move a resource to a specific node | crm resource move RESOURCE NODE | pcs resource move RESOURCE NODE |
| Move a resource away from its current node | crm resource ban RESOURCE NODE | pcs resource ban RESOURCE NODE |
| Remove any constraints created by moving a resource | crm resource unmove RESOURCE | pcs resource clear RESOURCE |