This will possibly delete all the VMs you have created or connected to that VM host – which may result in data loss. Using the above example, if you are running both a VM host and a rack controller for MAAS 2.6 on one system, and you suddenly decide to delete that rack controller from 2.6 and attempt to register the same code to a 2.9 MAAS, the VM host may fail or disappear. If you delete a rack controller from, say, a 2.6 version of MAAS, and attempt to register that 2.6 version of the rack controller code to, say, a 2.9 version of MAAS, you may experience errors and potential data loss.
#MULTI RACK APP SOFTWARE#
Moving a rack controller from one version of MAAS to another: MAAS rack controller software is an integral part of each version of MAAS. If the resources on the system are not more than adequate to cover both tasks, you may see slowdowns (or even apparent “freeze” events) on the system. Using the same system as a rack controller and a VM host: While not forbidden or inherently dangerous, using the same machine as both a rack controller and a VM host may cause resource contention and poor performance. These dangers are precipitated by one caveat and two potential mistakes: There are dangers associate with moving a rack controller – dangers that may generate errors, get you into a non-working state, or cause you significant data loss. This behaviour may change with future versions of MAAS.Ībout the potential dangers of moving a rack controller Unless you remove the software on this machine, rebooting it will cause the machine to re-instate itself as a rack controller. Note that you will need multiple rack controllers to achieve specific high availability configurations. You can also list and confirm all registered rack controllers via the CLI select the link at the top of the page to find out how. The commands there will already include the correct MAAS URL and secret, so you can cut and paste them at the command line. Simply click on the button labeled, “Add rack controller” and choose the instructions relevant to your build model (snap or packages). Note that on the UI, you can find complete instructions for adding a rack controller under the “Controllers” tab.
The $SECRET is stored in file /var/lib/maas/secret on the API server.
Sudo maas init rack -maas-url $MAAS_URL -secret $SECRET
#MULTI RACK APP INSTALL#
To install and register a rack controller with the MAAS: sudo snap install maas
#MULTI RACK APP HOW TO#
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