Upgrade Checkmk Raw to Enterprise Free Edition

Steps to upgrade exiting Checkmk Raw to Enterprise Free Edition which is limited to two sites, each with a maximum of 10 hosts that can be monitored.

1. Download the latest version of Checkmk Enterprise – Free Edition for CentOS 7 and transfer it to existing Checkmk Raw Edition Server
2. Install the checkmk enterprise free edition

[root@checkmk tmp]# yum install check-mk-enterprise-1.6.0p11.demo-el7-38.x86_64.rpm

3. Verify the Checkmk Enterprise Free Edition (.cee) is installed successfully

[root@checkmk tmp]# omd version
OMD - Open Monitoring Distribution Version 1.6.0p11.cee.demo

4. Switch to installed checkmk site and upgrade from Raw to Enterprise Edition

[root@checkmk tmp]# su checkmk
OMD[checkmk]:~$ omd version
OMD - Open Monitoring Distribution Version 1.6.0p11.cre
OMD[checkmk]:~$ omd stop
OMD[checkmk]:~$ omd update

Select the Checkmk Enterprise Free Edition (.cee.demo) and click Update Now

5. Start omd services

OMD[checkmk]:~$ omd start

6. Login to https://FQDN-CHECKMK/checkmk to verify that it had been upgraded to Enterprise Free Edition

Change the Core from NAGIOS to CMC

Change the Core Engine from nagios to CMC (Check_MK Micro Core)

# Verify the existing CORE used
[root@checkmk tmp]# omd config checkmk show
CORE: nagios
PNP4NAGIOS: on

#Stop the omd site
[root@checkmk tmp]# omd stop
#Change from nagios to cmc 
[root@checkmk tmp]# omd config checkmk set CORE cmc
#Start the omd site
[root@checkmk tmp]# omd start
# Verify Core is changed to cmc now
[root@checkmk tmp]# omd config checkmk show
CORE: cmc

Advanced Graphing

Enable the new CMC format to replace the existing pnp4nagios

1. Backup existing graph data in ~/var/pnp4nagios/perfdata/ to /tmp/backup.tar

tar -cvzf ~/tmp/backup.tar ~/var/pnp4nagios/perfdata/

2. Go to WATO-CONFIGURATION – Host & Service Parameters – Monitoring Configuration – Various – Configuration of RRD database of hosts

3. Create a new rule for RRD Storage Format = One RRD per host/service (saves disk IO, only with CMC) and activate the changes

4. Migrate existing RRDs to new format

[root@checkmk tmp]# su checkmk
# Migrate existing RRDs 
OMD[mysite]:~$ cmk --convert-rrds -v

# Path for new RRDs files
OMD[checkmk]:~/var/check_mk/rrd$ ls
AVENTIS-AD01/  AVENTIS-MGMT/

5. Delete all files in ~/var/pnp4nagios/perfdata to free up disk space

OMD[mysite]:~$ cmk --convert-rrds --delete-rrds -v

6. Click on the graph icon to view the Graph

Reference Links

1. Support for new RRD format with more efficient Disk IO
2. Checkmk Edition