Upgrade

MMM 2.1.0 is backwards compatible with MMM 2.0.x, so a monitoring host running version 2.1.0 can talk to agents running 2.0.x and the other way around.

1. Stop mmmd_mon (if you have multiple clusters running, be sure to stop all instances of mmmd_mon):

   /etc/init.d/mysql-mmm-monitor stop

2. When using the .debs edit /etc/default/mysql-mmm-monitor and set ENABLED to 0
3. Install the new version of MMM.
4. mmmd_mon was renamed to mmm_mond. So you can delete the old binary:

   rm -f /usr/sbin/mmmd_mon

5. If you have multiple clusters running, recreate your init-scripts for these by cloning /etc/init.d/mysql-mmm-monitor and adjusting the variable CLUSTER
6. (Optional) Edit mmm_mon.conf and change status_path from /var/lib/misc/mmmd_mon.status to /var/lib/misc/mmm_mond.status - afterwards copy the existing status file to its new location:

   cp /var/lib/misc/mmmd_mon.status /var/lib/misc/mmm_mond.status

7. Edit mmm_mon.conf and change pid_path from /var/run/mmmd_mon.pid to /var/run/mmm_mond.pid
8. The helper binaries have been moved so edit mmm_*.conf and change bin_path from /usr/bin/mysql-mmm.html to /usr/lib/mysql-mmm.html - then delete the old binaries:

   rm -rf /usr/bin/mysql-mmm

9. When using the .debs edit /etc/default/mysql-mmm-monitor and set ENABLED to 1
10. Start mmm_mond (if you use more than one cluster, don't forget to start them too):

    /etc/init.d/mysql-mmm-monitor start

1. Stop mmmd_agent:

   /etc/init.d/mysql-mmm-agent stop

2. When using the .debs edit /etc/default/mysql-mmm-agent and set ENABLED to 0
3. Install the new version of MMM.
4. mmmd_agent was renamed to mmm_agentd. So you can delete the old binary:

   rm -f /usr/sbin/mmmd_agent

5. The helper binaries have been moved so edit mmm_*.conf and change bin_path from /usr/bin/mysql-mmm.html to /usr/lib/mysql-mmm.html - then delete the old binaries:

   rm -rf /usr/bin/mysql-mmm

6. Edit mmm_*.conf and change pid_path in the <host> sections from /var/run/mmmd_agent.pid to /var/run/mmm_agentd.pid
7. When using the .debs edit /etc/default/mysql-mmm-agent and set ENABLED to 1
8. Start mmm_agentd:

   /etc/init.d/mysql-mmm-agent start