Check wildfly-memory-usage

Overview

This check plugin monitors the heap and non-heap memory usage of a WildFly server, using its HTTP-JSON based API (JBossAS REST Management API). This allows us to monitor the application server without any additional configuration and installation - no need to deploy WAR-Agents like Jolokia. The plugin supports both standalone mode and domain mode.

Tested with WildFly 11 and WildFly 23.

To create a monitoring user, do this:

/opt/wildfly/bin/add-user.sh
What type of user do you wish to add?
 a) Management User (mgmt-users.properties)
 b) Application User (application-users.properties)
(a): a

Enter the details of the new user to add.
Using realm 'ManagementRealm' as discovered from the existing property files.
Username : wildfly-monitoring
Password :
Re-enter Password :
What groups do you want this user to belong to? (Please enter a comma separated list, or leave blank for none)[  ]:
About to add user 'wildfly-monitoring' for realm 'ManagementRealm'
Is this correct yes/no? yes
Is this new user going to be used for one AS process to connect to another AS process?
e.g. for a slave host controller connecting to the master or for a Remoting connection for server to server Jakarta Enterprise Beans calls.
yes/no? no

Fact Sheet

Check Plugin Download

https://github.com/Linuxfabrik/monitoring-plugins/tree/main/check-plugins/wildfly-memory-usage

Check Interval Recommendation

Once a minute

Can be called without parameters

No

Available for

Python 2, Python 3, Windows

Requirements

None

Help

usage: wildfly-memory-usage [-h] [-V] [--always-ok] [--critical CRIT]
                            [--instance INSTANCE]
                            [--mode {standalone,domain}] [--node NODE] -p
                            PASSWORD [--timeout TIMEOUT] [--url URL]
                            --username USERNAME [--warning WARN]

Checks the memory usage of a Wildfly/JBossAS over HTTP.

optional arguments:
  -h, --help            show this help message and exit
  -V, --version         show program's version number and exit
  --always-ok           Always returns OK.
  --critical CRIT       Set the critical threshold.
  --instance INSTANCE   The instance (server-config) to check if running in
                        domain mode.
  --mode {standalone,domain}
                        The mode the server is running.
  --node NODE           The node (host) if running in domain mode.
  -p PASSWORD, --password PASSWORD
                        WildFly API password.
  --timeout TIMEOUT     Network timeout in seconds. Default: 3 (seconds)
  --url URL             WildFly API URL. Default: http://localhost:9990
  --username USERNAME   WildFly API username. Default: wildfly-admin
  --warning WARN        Set the warning threshold.

Usage Examples

./wildfly-memory-usage --username wildfly-monitoring --password password --url http://wildfly:9990 --warning 80 --critical 90

Output:

Heap used: 18.04% (82.2MiB of 455.5MiB), Heap committed: 44.35% (202.0MiB of 455.5MiB), Non-Heap used: 14.56% (108.3MiB of 744.0MiB), Non-Heap committed: 16.25% (120.9MiB of 744.0MiB)

States

Triggers an alarm on usage in percent.

  • WARN or CRIT if memory usage (used or committed, heap or non-heap) is above certain thresholds (default 80/90%)

Perfdata / Metrics

  • heap-committed: in bytes

  • heap-committed-percent: in percent

  • heap-max: in bytes

  • heap-usage-percent: in percent

  • heap-used: in bytes

  • non-heap-committed: in bytes

  • non-heap-committed-percent: in percent

  • non-heap-max: in bytes

  • non-heap-usage-percent: in percent

  • non-heap-used: in bytes

Credits, License