A monitoring/inventory plugin to check components and health status of systems which support Redfish. It will also create a inventory of all components of a system.

This is a monitoring/inventory plugin to check components and health status of systems which support Redfish. It will also create an inventory of all components of a system.

NetBox import support

You are also able to import the inventory files into NetBox using netbox-snyc.


  • 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 /usr/lib64/nagios/plugins/
    git clone
    cd check_redfish
    pip3 install -r requirements.txt || pip install -r requirements.txt

Icinga2 and Grafana

Command definitions and a service config example for Icinga2 can be found in contrib. There is also an InfluxDB dashboard for some metrics included.


usage: [-H HOST] [-u USERNAME] [-p PASSWORD] [-f AUTHFILE]
                        [--sessionfile SESSIONFILE]
                        [--sessionfiledir SESSIONFILEDIR] [--nosession] [-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] [--all] [-i]
                        [--inventory_id INVENTORY_ID]
                        [--inventory_file INVENTORY_FILE]

This is a monitoring/inventory plugin to check components and
health status of systems which support Redfish.
It will also create a inventory of all components of a system.


Version: 1.3.2 (2022-01-23)

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
  --nosession           Don't establish a persistent session and log out after
                        check is finished

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 https requests and responses to
                        output, also adds inventory source data to all
                        inventory objects
  -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 information (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 info and status
  --info                request system information
  --firmware            request firmware information
  --sel                 request System Log status
  --mel                 request Management Processor Log status
  --all                 request all of the above information at once

query inventory information (no health check):
  -i, --inventory       return inventory in json format instead of regular
                        plugin output
  --inventory_id INVENTORY_ID
                        set an ID which can be used to identify this host in
                        the destination inventory
  --inventory_file INVENTORY_FILE
                        set file to write the inventory output to. Otherwise
                        stdout will be used.

General usage

multiple request commands can be combined. Or use --all to query all system information at once

Let's start with an example

/usr/lib64/nagios/plugins/check_redfish/ -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 timeout in the BMC should be at least 6 minutes!

No Session

If no session is required (i.e.: testing, inventory collection) then a --nosession can be added to close session on the BMC properly.

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:


WARNING and CRITICAL (health checks only)

you can use warning and critical with following commands:

--mel and --sel (values are passed as "days")
define after how many days' event log entries which have a != OK severity shouldn't be alerted anymore. On most 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.

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

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

Detailed (health checks only)

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 https requests and responses will be printed.

Max option (health checks only)

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 these 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

Inventory data

This plugin is able to return a (almost) complete inventory of the queried system. Just add the command option --inventory or -i to get the inventory in a JSON format.

This is the first official version and might still change later on. If you encounter problems or have suggestions for changes/improvements then please create a GitHub issue.

Example of power supply inventory (--power --inventory)

    "inventory": {
        "chassi": [],
        "fan": [],
        "firmware": [],
        "logical_drive": [],
        "manager": [],
        "memory": [],
        "network_adapter": [],
        "network_port": [],
        "physical_drive": [],
        "power_supply": [
                "bay": 1,
                "capacity_in_watt": 500,
                "chassi_ids": [
                "firmware": "1.03",
                "health_status": "OK",
                "id": "0",
                "input_voltage": 224,
                "last_power_output": 110,
                "model": "XXXXXX-B21",
                "name": "HpeServerPowerSupply",
                "operation_status": "Enabled",
                "part_number": "XXXXXX-001",
                "serial": "XXXXXXX",
                "type": "AC",
                "vendor": "CHCNY"
                "bay": 2,
                "capacity_in_watt": 500,
                "chassi_ids": [
                "firmware": "1.03",
                "health_status": "OK",
                "id": "1",
                "input_voltage": 228,
                "last_power_output": 110,
                "model": "XXXXXX-B21",
                "name": "HpeServerPowerSupply",
                "operation_status": "Enabled",
                "part_number": "XXXXXX-001",
                "serial": "XXXXXXX",
                "type": "AC",
                "vendor": "CHCNY"
        "processor": [],
        "storage_controller": [],
        "storage_enclosure": [],
        "system": [],
        "temperature": []
    "meta": {
        "data_retrieval_issues": {},
        "duration_of_data_collection_in_seconds": 1.002901,
        "host_that_collected_inventory": "",
        "inventory_id": null,
        "inventory_layout_version": "1.2.0",
        "script_version": "1.2.0",
        "start_of_data_collection": "2021-04-01T09:09:07+02:00"

Verbose output

In case you need more information or want to debug the data you can add the verbose option. This will also add the source_data attribute for each inventory item.

Inventory attributes

You can find a list of attributes for each item here

Inventory file

It is also possible to use the cli option --inventory_file to write the inventory data to a file. This way it can be forwarded or used in an inventory import tool. Here you also might want to use --inventory_id to get a fixed reference to an existing object.

Known limitations

  • On HPE iLO4 a maximum of 30 entries will be returned for the commands --mel and --sel
  • On almost all systems the nic status is reported unreliable
  • 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 BL460c Gen9
  • ProLiant BL460c Gen10
  • 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 8 Version
  • PowerEdge R640 (iDrac 9 Version
  • PowerEdge R740 (iDRAC 9 Version
  • PowerEdge R740xd (iDRAC 9 Version
  • PowerEdge R7515 (iDRAC 9 Version
  • PowerEdge R840 (iDRAC 9 Version
  • PowerEdge R930 (iDRAC 8 Version


  • TaiShan 2280 V2 (iBMC Version 3.63)
  • X8600 Blade (iBMC Version 3.04)



  • iRMC S5 Firmware 2.60 till 2.63 has a minor bug, avoid usage!
  • make sure to use --detailed option for memory check. HealthRollup for Memory is not working/existent!
  • iRMC S5 Firmware 3.06P reports storage data twice for some components Models:
  • PRIMERGY RX2530 M5 (iRMC Version 2.50P)
  • PRIMERGY RX2540 M4 (iRMC Version 2.50P)
  • PRIMERGY RX2540 M5 (iRMC Version 2.50P)


  • Cisco C220M4SX (CIMC Version 4.1(2a))
  • Cisco C220M5SX (CIMC Version 3.1(3a))
  • Cisco C240M5SX (CIMC Version 3.1(3a))

Inspur (limited support)

  • Inspur NF5280 M5 (4.26.3)
  • Inspur NF5280 M6 (4.12.04)


>You can check out the full license here

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