How to configure VMware monitoring in Check_MK

Check_MK is able to monitor ESXi or vCenter out of the box. The configuration requires 2 steps and preferred a read only user.

1. Login to Check_MK


2. Create new Host


Hostname: ESXi/vCenter Name or fqdn
IP Address: ESXi/vCenter Management IP


Save & Go to Services

The error message is normal and we can ignore it.


3. Go to Host & Service Parameters


4. Click on Datasource Programs


5. Click Check state of VMWare ESX via vSphere

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6. Create rule in folder Main directory

Explicit hosts: ESXi-Name
vSphere User name: ReadOnlyUser-Name
vSphere secret: Password of the ReadOnlyUser
 Host Systems
 Virtual Machines
 Performance Counters
 License Usage
 Display ESX Host power state on 
 Display VM power state on
 Placeholder VMs 

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8. Click on Save

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9. Activate your changes

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10. Click on Hosts

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11. Click on Hosts

3rd icon – Edit services of host

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12. Activate missing

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13. Activate your changes –> see step 9

14. Check your discovered services.

Go to Views –> All Services

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15. Click on the refresh icon next to Check_MK and Check_MK Discovery

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That’s all. If you have question just leave a comment.

3 thoughts on “How to configure VMware monitoring in Check_MK

  1. Hi,
    when I try to do that, I only see one Service.
    Only “esx_vsphere_objects.count” is discovered an this reports “Virtualmachines: 0”.
    Can you tell me, what I do wrong?
    My Check_MK Version is 1.2.6p16

    1. Hi,

      have you executed an discovery? WATO –> Configuration –> Hosts –> On top Bulk Discovery –> Select “Find new & remove obsolete” and click start.


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