We’ve collected some of the most asked questions about
Access hardware/software inventory
In a multi-site environment sites are able to collect hardware/software information from their monitored hosts. If you have configured
idoitcmk to fetch information about your hosts from one site this site will need access to the other sites’ hardware/software inventory. To do so please make sure you have the following settings:
- Go to WATO > Distributed Monitoring > Edit slave site > Livestatus settings > Connection
- Select Use Livestatus Proxy Daemon
- Select option TCP port to connect to for Connect to
- Add FQDN/IP and port for the selected slave which other sites can use
- Uncheck Allow access via TCP
- Save and activate your changes
Now you will see inside the Web GUI a button called Inventory on each status page of a host. This is a good indicator that
idoitcmk may access inventory information via Web API as well.
The add-on supports more than one tenants provided by i-doit. For each i-doit tenant you need to configure an unique API key.
For example, you already have created 2 or more tenants in i-doit. Create for each tenant a slightly different configuration file and add each tenant’s API key to the setting
i-doit.key. The setting
i-doit.url is always the same but the settings
i-doit.password may differ. For each tenant call
idoitcmk and add the option
You can even mix-up configuration files: One file contains common settings and the others are tenant-specific. For example:
Compare host tags between Check_MK and i-doit
Host tags are grouped in Check_MK. This is an example for a tag group with all its tags:
Internal ID: criticality Title: Criticality Topic: – Choices: 1 Tag ID: prod Description: Productive system 2 Tag ID: critical Description: Business critical 3 Tag ID: test Description: Test system 4 Tag ID: offline Description: Do not monitor this host
Via Check_MK Web API you receive for the tag
prod this key-value pair:
As you can see, the key of a tag group is prefixed by
tag_ followed by its
Internal ID, here:
Tag ID is used as the value.
On i-doit side these grouped tags are named
static host tags. You find them in
Extras > Check_MK 2 > Tags (static). This is the representation of the tag
prod mentioned above:
Host tag (id): prod Display name: Productive system Host group: criticality Description: Criticality
Here is a direct comparison between Check_MK and i-doit:
Self-signed certificates and other problems with TLS connections
It’s common practice to enforce TLS-encrypted HTTPS connections between
idoitcmk, i-doit and Check_MK – even in firewalled private networks. Often self-signed x.509 certificates are used. That’ll no problem at all, if you take care of these steps:
- The host
idoitcmkruns on (precisely: OpenSSL which is used by cURL which is used by PHP) needs to verify the complete certificate chain, especially the root certificate. Therefore, import your root certificate on that host. You should test if everything works by running the
- Alternatively, but strictly not recommended just disable this certificate verification. You must disable it for both connections to i-doit and Check_MK by adding two new configuration settings. Example:
Please keep in mind that disabling verification does not protect your setup from man-in-the-middle attacks. This weakens your IT security significantly. You’ll be warned.
Check_MK responds with HTTP status code “414”
Sometimes Check_MK responds with HTTP status code
414 URI too long while requesting the hardware/software inventory API. For example, this could happen while executing the command
$ idoitcmk pull Import inventory data into CMDB Looking for hosts in Check_MK… Found 1234 hosts Read hardware/software inventory data for each host… Web server responded with HTTP status code "414"
To prevent this error you should decrease the configuration setting
i-doit.limitBatchRequests. Default value is
500. A value of
100 should be working.
Duplicated Objects after pulling to i-doit
If the Matching seems not working properly, get sure that the categorys “Checkmk Host” and Checkmk Tags" are assigned to the Objecttypes you pull to i-doit.For this you can use the Quick Configuration Wizard
It might also be necessary to reduce the pull identifiers to e.g. hostname.