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[SRX] How to schedule operational commands without using scripts

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Article ID: KB22795 KB Last Updated: 29 Sep 2020Version: 2.0
Summary:

This article provides information on how to take the output of certain commands at fixed intervals or at a particular time during the day. The output can be locally recorded or sent to an external server.

Symptoms:

You can schedule, for monitoring and troubleshooting purposes, certain operational commands at regular intervals or fixed time of the day. Scripts can be used for this; but it might be hard to figure out when there is an issue with the script.

Junos Event-Options is used to perform the function of operational scripts.

Solution:

The Event-Options feature allows you to perform predefined tasks, which are triggered based on the following types of events:

  • System-generated events

  • Manually generated events

In this case, you can use manually generated events, which can be triggered by users at specific times.

Configuration

set event-options generate-event testEvent time-of-day "10:42:00 +0000"
set event-options policy Policy1 events testEvent
set event-options policy Policy1 then execute-commands commands "show system uptime"
set event-options policy Policy1 then execute-commands output-filename test1
set event-options policy Policy1 then execute-commands destination local-directory
set event-options destinations local-directory archive-sites /var/tmp/

Verify the configuration:

show event-options
generate-event {
   testEvent time-of-day "10:42:00 +0000";
}
policy Policy1 {
   events testEvent;
   then {
      execute-commands {
         commands {
            "show system uptime";
         }
         output-filename test1;
         output-format text;
         destination local-directory;
      }
   }
}
destinations {
   local-directory {
      archive-sites {
         /var/tmp/;
      }
   }
}

This configuration will generate a testEvent at 10:42:00 +0000 every day. Policy1 will look for testEvent. Whenever this event is generated, the SRX device will record the output of the configured command in a local file in /var/tmp/.

The archive destination can be specified as:

  • Hypertext Transfer Protocol (HTTP) URL

  • FTP URL or

  • Secure copy (scp)-style remote file specification.

You can check the local directory by using the file list /var/tmp/ details operation mode command, after the scheduled time.

For more information, refer to Event Policy File Archiving Overview

The target filename will start with a underscore ( _ ), if the hostname (#set system hostname) is not configured for the device. If it is configured, the filename will start with the hostname.Note:

  •  A new file will be generated each time the event is triggered and the name of the new file will contain the corresponding time stamp; so the files will keep on archiving without any limit to the number of files. The output will not append to the previous file.

  • URLs of the file:/// type are not supported; however, local device directories are supported (for example, /var/tmp/).

  • If the generate-event option has time-interval in X seconds specified, then the event will be generated right at the commit of this config and after every X seconds.

  • If the generate-event option has time-of-day specified, then the event will be generated every day (24 hrs fixed interval) at the specified time.

  • Additionally, this configuration can also match system generated events. You can explore the events under set event-options policy <policy-name> events.

Modification History:
2020-09-28: Fixed broken link.
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