A monitoring plugin to check components and health status of systems which support Redfish

This is a monitoring plugin to check components and health status of systems which support Redfish.


  • python >= 3.6
  • redfish >= 2.1.4


RedHat based OS

  • on RedHat/CentOS you need to install python3.6 and pip from EPEL first

  • on RedHat/CentOS 8 systems the package name changed to python3-pip

    yum install python36-pip
  • download and install plugin

    cd /tmp
    git clone
    cd check_redfish
    pip3 install -r requirements.txt || pip install -r requirements.txt
    install -m 755 -D /usr/lib64/nagios/plugins/
    cd /tmp
    rm -rf /tmp/check_redfish


Command definitions and a service config example for Icinga2 can be found in contrib


usage: [-H HOST] [-u USERNAME] [-p PASSWORD] [-f AUTHFILE]
                        [--sessionfile SESSIONFILE]
                        [--sessionfiledir SESSIONFILEDIR] [-h] [-w WARNING]
                        [-c CRITICAL] [-v] [-d] [-m MAX] [-r RETRIES]
                        [-t TIMEOUT] [--storage] [--proc] [--memory] [--power]
                        [--temp] [--fan] [--nic] [--bmc] [--info] [--firmware]
                        [--sel] [--mel]

This is a monitoring plugin to check components and
health status of systems which support Redfish.


Version: 0.0.11 (2020-02-11)

mandatory arguments:
  -H HOST, --host HOST  define the host to request. To change the port just
                        add ':portnumber' to this parameter.

authentication arguments:
  -u USERNAME, --username USERNAME
                        the login user name
  -p PASSWORD, --password PASSWORD
                        the login password
  -f AUTHFILE, --authfile AUTHFILE
                        authentication file with user name and password
  --sessionfile SESSIONFILE
                        define name of session file
  --sessionfiledir SESSIONFILEDIR
                        define directory where the plugin saves session files

optional arguments:
  -h, --help            show this help message and exit
  -w WARNING, --warning WARNING
                        set warning value
  -c CRITICAL, --critical CRITICAL
                        set critical value
  -v, --verbose         this will add all requests and responses to output
  -d, --detailed        always print detailed result
  -m MAX, --max MAX     set maximum of returned items for --sel or --mel
  -r RETRIES, --retries RETRIES
                        set number of maximum retries (default: 3)
  -t TIMEOUT, --timeout TIMEOUT
                        set number of request timeout per try/retry (default:

query status/health informations (at least one is required):
  --storage             request storage health
  --proc                request processor health
  --memory              request memory health
  --power               request power supply health
  --temp                request temperature sensors status
  --fan                 request fan status
  --nic                 request network interface status
  --bmc                 request bmc infos and status
  --info                request system informations
  --firmware            request firmware informations
  --sel                 request System Log status
  --mel                 request Management Processor Log status

General usage

multiple request commands can be combined.

Lets start with an example

/usr/lib64/nagios/plugins/ -H -f /etc/icinga2/ilo_credentials --storage --power

  • request BMC:
  • use credentials from file: /etc/icinga2/ilo_credentials
  • query health of: storage, power

Alternative HTTPS port

If you want to use a different Port then 443 then just add the port to the Host parameter.
Example for Port 8443:



Credentials can be provided in 3 ways and will be checked in following order:

  • using --username and --password options (credentials will be exposed in process list)
  • using an auth file which includes the credentials
  • add credentials to environment

Authentication file

An authentication credential file can be provided. The structure looks like this:


Environment variables

these two environment vars will be checked

    export CHECK_REDFISH_USERNAME=icinga
    export CHECK_REDFISH_PASSWORD=readonlysecret

Sessions and session resumption

To avoid delays due to login on every request and flooding the event log with login/logout messages a session resumption was implemented. If the session in the BMC is expired a new session and session file will be created.

To actually benefit from this feature you need to set the user session timeout in the BMC to a higher value then your default check interval!

If your default check interval is 5 minutes then the session timout in the BMC should be at least 6 minutes!

Session file name and location

Per default a session file will be crated in the system/user default temp path. These defaults can be changed with following options:

Use --sessionfiledirto define where the session files should be stored Use --sessionfile to specify the name of the session file for this particular system


options like this:

--sessionfiledir /var/plugin/tmp --sessionfile my-hostname.session

results in following session file:



you can use warning and critical with following commands:

--mel (values are passed as "days")
define after how many days event log entries which have a != OK severity shouldn't be alerted anymore. On HPE systems it is not possible to set management event log entries as cleared. So entries with a severity of warning would alarm forever. This way they change state while they age.

--sel (values are passed as "days")
works the same way as stated above for HPE systems just for SEL on Huawei systems

Example: --mel --critical 1 --warning 3

  • Entries with a != OK severity which are not older then 24 hours are reported as CRITICAL
  • Entries with a != OK severity which are not older then 72 hours are reported as WARNING
  • Any entries with a != OK severity which are older then 72 hours will be roprted as OK


Health status by default will be reported as a summary:

[OK]: All power supplies (2) are in good condition|'ps_1'=122 'ps_2'=109

If multiline output by default is preferred the option --detailed needs to be added

[OK]: Power supply 1 (865408-B21) status is: Ok
[OK]: Power supply 2 (865408-B21) status is: Ok|'ps_1'=121 'ps_2'=109


Use option --verbose to check for connection problems. All redfish requests and responses will be printed.

Max option

This option can be used to limit the results output for event log entries requested by --mel and --sel

Timeout and Retries

Sometimes an iLO4 BMC can be very slow in answering Redfish request. To avoid getting "retries exhausted" alarms you can increase the number of retries and/or the timeout. The timeout defines the seconds after each try/retry times out. If you increase theses values make sure to also adjust the check_timeout setting in your Icinga2 service definition. The total runtime of this plugin (if all retries fail) can be calculated like this: (1. try + num retries) * timeout

The default number of retries is set to 3 and the default timeout is set to 7. In case all retries fail then the plugin would be finished after 28 seconds.

(1 + 3) * 7 = 28

Known limitations

  • On HPE iLO4 a maximum of 30 entries will be returned for the commands --mel and --sel
  • On HPE systems the nic status is reported unreliable
  • On Lenovo systems the commands --mel and --sel are not implemented due to issues with timeouts
  • On Huawei systems the command --mel is not implemented
  • For --storage components which report a Status.Health as None will be treated as OK if Status.State is set to Enabled

Supported Systems

This plugin is currently tested with following systems

Hewlett Packard Enterprise

Almost all Server which have iLO4 (2.50) or iLO5 (1.20) should work

  • ProLiant BL460c Gen8
  • ProLiant DL360p Gen8
  • ProLiant DL360 Gen9
  • ProLiant DL360 Gen10
  • ProLiant DL380p Gen8
  • ProLiant DL380 Gen9
  • ProLiant DL380 Gen10
  • ProLiant DL560 Gen10
  • ProLiant DL580 Gen8
  • ProLiant DL580 Gen9


  • ThinkSystem SR650 (BMC Version 2.12)


  • PowerEdge R630 (iDRAC Version
  • PowerEdge R740 (iDRAC Version
  • PowerEdge R930 (iDRAC Version


  • TaiShan 2280 V2 (iBMC Version 3.63)


  • PRIMERGY RX2540 M5 (iRMC Version 2.50P)


>You can check out the full license here

This project is licensed under the terms of the MIT license.