Red Hat Summit21장. Resource monitoring operations
To ensure that resources remain healthy, you can add a monitoring operation to a resource’s definition. If you do not specify a monitoring operation for a resource, by default the pcs command will create a monitoring operation, with an interval that is determined by the resource agent. If the resource agent does not provide a default monitoring interval, the pcs command will create a monitoring operation with an interval of 60 seconds.
The following table summarizes the properties of a resource monitoring operation.
| Field | Description |
|---|---|
|
| Unique name for the action. The system assigns this when you configure an operation. |
|
|
The action to perform. Common values: |
|
|
If set to a nonzero value, a recurring operation is created that repeats at this frequency, in seconds. A nonzero value makes sense only when the action
If set to zero, which is the default value, this parameter allows you to provide values to be used for operations created by the cluster. For example, if the |
|
|
If the operation does not complete in the amount of time set by this parameter, abort the operation and consider it failed. The default value is the value of
The |
|
| The action to take if this action ever fails. Allowed values:
*
*
*
*
*
*
*
The default for the |
|
|
If |
21.1. Configuring resource monitoring operations
You can configure monitoring operations when you create a resource with the following command.
pcs resource create resource_id standard:provider:type|type [resource_options] [op operation_action operation_options [operation_type operation_options]...]
For example, the following command creates an IPaddr2 resource with a monitoring operation. The new resource is called VirtualIP with an IP address of 192.168.0.99 and a netmask of 24 on eth2. A monitoring operation will be performed every 30 seconds.
# pcs resource create VirtualIP ocf:heartbeat:IPaddr2 ip=192.168.0.99 cidr_netmask=24 nic=eth2 op monitor interval=30sAdding a monitoring operation to an existing resource
Add a monitoring operation to an existing resource with the following command.
# pcs resource op add resource_id operation_action [operation_properties]Deleting a configured resource operation
Use the following command to delete a configured resource operation.
# pcs resource op remove resource_id operation_name operation_propertiesYou must specify the exact operation properties to properly remove an existing operation.
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