Chapter 28. Triggering scripts for cluster events

1. Configure an alert that calls the script myscript.sh and that uses a 15-second timeout.

   # pcs alert create id=my-alert path=/path/to/myscript.sh meta timeout=15s

   Copy to Clipboard

2. Add an alert recipient that has an ID of my-alert-recipient1, passing the call to the recipient someuser@example.com with a timestamp in the format %D %H:%M.

   # pcs alert recipient add my-alert value=someuser@example.com id=my-alert-recipient1 meta timestamp-format="%D %H:%M"

   Copy to Clipboard

3. Add an alert recipient that has an ID of my-alert-recipient2, passing the call to the recipient otheruser@example.com with a timestamp in the format %c.

   # pcs alert recipient add my-alert value=otheruser@example.com id=my-alert-recipient2 meta timestamp-format="%c"

   Copy to Clipboard

Procedure

1. Create a simple alert. Since no alert ID value is specified, the system creates an alert ID value of alert.

   # pcs alert create path=/my/path

   Copy to Clipboard

2. Add a recipient of rec_value to the alert. Since this command does not specify a recipient ID, the value of alert-recipient is used as the recipient ID.

   # pcs alert recipient add alert value=rec_value

   Copy to Clipboard

3. Add a second recipient of rec_value2 to the alert. This command specifies a recipient ID of my-recipient for the recipient.

   # pcs alert recipient add alert value=rec_value2 id=my-recipient

   Copy to Clipboard

4. Display the alert configuration.

   # pcs alert config
   Alerts:
    Alert: alert (path=/my/path)
     Recipients:
      Recipient: alert-recipient (value=rec_value)
      Recipient: my-recipient (value=rec_value2)

   Copy to Clipboard

5. Add a second alert, with an alert ID of my-alert.

   # pcs alert create id=my-alert path=/path/to/script description=alert_description options option1=value1 opt=val meta timeout=50s timestamp-format="%H%B%S"

   Copy to Clipboard

6. Add a recipient for that alert for the second alert with a recipient value of my-other-recipient. Since no recipient ID is specified, the system provides a recipient id of my-alert-recipient.

   # pcs alert recipient add my-alert value=my-other-recipient

   Copy to Clipboard

7. Display the alert configuration.

   # pcs alert
   Alerts:
    Alert: alert (path=/my/path)
     Recipients:
      Recipient: alert-recipient (value=rec_value)
      Recipient: my-recipient (value=rec_value2)
    Alert: my-alert (path=/path/to/script)
     Description: alert_description
     Options: opt=val option1=value1
     Meta options: timestamp-format=%H%B%S timeout=50s
     Recipients:
      Recipient: my-alert-recipient (value=my-other-recipient)

   Copy to Clipboard

8. Modify the alert values for the alert my-alert.

   # pcs alert update my-alert options option1=newvalue1 meta timestamp-format="%H%M%S"

   Copy to Clipboard

9. Modify the alert values for the recipient my-alert-recipient.

   # pcs alert recipient update my-alert-recipient options option1=new meta timeout=60s

   Copy to Clipboard

10. Display the alert configuration.

    # pcs alert
    Alerts:
     Alert: alert (path=/my/path)
      Recipients:
       Recipient: alert-recipient (value=rec_value)
       Recipient: my-recipient (value=rec_value2)
     Alert: my-alert (path=/path/to/script)
      Description: alert_description
      Options: opt=val option1=newvalue1
      Meta options: timestamp-format=%H%M%S timeout=50s
      Recipients:
       Recipient: my-alert-recipient (value=my-other-recipient)
        Options: option1=new
        Meta options: timeout=60s

    Copy to Clipboard

11. Remove the recipient my-alert-recipient from alert.

    # pcs alert recipient remove my-recipient

    Copy to Clipboard

12. Display the alert configuration.

    # pcs alert
    Alerts:
     Alert: alert (path=/my/path)
      Recipients:
       Recipient: alert-recipient (value=rec_value)
     Alert: my-alert (path=/path/to/script)
      Description: alert_description
      Options: opt=val option1=newvalue1
      Meta options: timestamp-format="%M%B%S" timeout=50s
      Recipients:
       Recipient: my-alert-recipient (value=my-other-recipient)
        Options: option1=new
        Meta options: timeout=60s

    Copy to Clipboard

13. Remove the alert myalert from the configuration.

    # pcs alert remove myalert

    Copy to Clipboard

14. Display the alert configuration.

    # pcs alert
    Alerts:
     Alert: alert (path=/my/path)
      Recipients:
       Recipient: alert-recipient (value=rec_value)

    Copy to Clipboard