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

check_mk_login

2. Create new Host

create_new_host

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

create_new_host_esxi

Save & Go to Services

The error message is normal and we can ignore it.

create_host_error

3. Go to Host & Service Parameters

host_service_parameters

4. Click on Datasource Programs

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
Select  
 Host Systems
 Virtual Machines
 Datastores
 Performance Counters
 License Usage
Select
 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 …

Setup check_mk

Check_MK is a monitoring solution which is originally based on Nagios. It has been extended with a nice web gui including a lot of new features which simplify the setup of a monitoring system. It is available as Enterprise edition and as RAW (Open Source) edition.

There is a limited english documentation available. https://mathias-kettner.de/checkmk.html

Steps to install and configure Check_MK on CentOS7:

Download CentOS7 image (minimal is sufficient) http://isoredirect.centos.org/centos/7/isos/x86_64/CentOS-7-x86_64-Minimal-1511.iso

Install Centos following the standard documention. After you have successfull installed Centos login to the system using SSH.

ssh root@centos7

First install all available updates.

yum update

Second some packages are required to be able to install check_mk successfully.

yum -y install epel-release
yum makecache all
yum -y install php-mcrypt

Download fping (http://pkgs.repoforge.org/fping/?C=M;O=D) and install it:

cd /root
wget http://pkgs.repoforge.org/fping/fping-3.10-1.el7.rf.x86_64.rpm
rpm -i fping*.rpm

Furthermore it is required to change SELINUX.

vi /etc/sysconfig/selinux
# This file controls the state of SELinux on