There are some things to consider in preparation of migrating your checkmk server to a different IP network.
Things to consider
- Agent Updater
- If the update server is not configured as a DNS name make sure to update the IP address of the update server prior to migration
- Make sure your TLS certificates do match the new server configuration and are baked into the agent
- Verify, that all agents are up-to-date!
- Agent Access
- Checkmk Agent: Ensure your IP whitelist contains both the old and new IP of the server prior to the migration (Rule: Allowed agent access via IP address (Linux, Windows))
- SNMP: Ensure ACL on SNMP devices will allow the new IP
- Firewall
- Make sure your central firewall(s) allow all necessary traffic (See the following article for reference: Which network ports are used by Checkmk services?)
- Routing
- If custom routes have been configured on the checkmk server, make sure to check and if necessary adapt them
- Webserver
- If the server name changes, you need to aquire new certificates. See also the section Agent Updater!
- Mailserver
- Make sure your mail server is still accessible from the new IP