How to deploy on MAAS

This guide aims to provide a quick start to deploying Charmed MySQL on MAAS. It summarizes the instructions from the Build a MAAS and LXD environment with Multipass Tutorial to set up and tear down a playground environment.

If you want to deploy MySQL on MAAS in a production environment, refer to the official Bootstrap MAAS Tutorial followed by the Charmed MySQL Tutorial.

Summary

• Bootstrap a Multipass VM
• Configure MAAS
• Register MAAS with Juju
• Deploy Charmed MySQL on MAAS
• Test Charmed MySQL deployment
• Clean up the environment

For further details and explanation about each step, remember you can refer to the original tutorial.

Bootstrap a Multipass VM

Install Multipass and launch a VM:

sudo snap install multipass

wget -qO- https://raw.githubusercontent.com/canonical/maas-multipass/main/maas.yml \
 | multipass launch --name maas -c8 -m12GB -d50GB --cloud-init -

The wget command provides a cloud-init file that will set up the VM’s LXD and MAAS environment.

Configure MAAS

1. Find your MAAS IP with

multipass list

2. Open http://<MAAS_IP>:5240/MAAS/ and log in with the default credentials: username=admin, password=admin.

3. Complete the additional MAAS configuration in the welcome screen.

The LXD machine will be up and running after the images downloading and sync is completed.

A note on DHCP

MAAS uses DHCP to boot and install new machines. You must enable DHCP manually if you see this banner on MAAS pages:

Make sure to enable DHCP service inside the MAAS VM only.

Use the internal VM network fabric-1 on 10.10.10.0/24 and choose a range (e.g. 10.10.10.100-10.10.10.120). Check the official MAAS manual for more information about enabling DHCP.

6. Finally, dump MAAS admin user API key to add as Juju credentials later:

multipass exec maas -- sudo maas apikey --username admin

Register MAAS with Juju

1. Enter the Multipass shell and install juju:

multipass shell maas
sudo snap install juju

2. Add MAAS cloud and credentials into juju.

These commands are interactive, so the following code block shows the commands followed by a sample output. Make sure to enter your own information when prompted by juju.

juju add-cloud

> Since Juju 2 is being run for the first time, downloading latest cloud information. Fetching latest public cloud list... Your list of public clouds is up to date, see `juju clouds`. Cloud Types
>    maas
>    manual
>    openstack
>    oracle
>    vsphere
> 
> Select cloud type: maas
> Enter a name for your maas cloud: maas-cloud 
> Enter the API endpoint url: http://<MAAS_IP>:5240/MAAS
> Cloud "maas-cloud" 

juju add-credential maas-cloud 

> ...
> Enter credential name: maas-credentials
> 
> Regions
>   default
> Select region [any region, credential is not region specific]: default
> ...
> Using auth-type "oauth1". 
> Enter maas-oauth: $(paste the MAAS Keys copied from the output above or from http://YOUR_MAAS_IP:5240/MAAS/r/account/prefs/api-keys ) 
> Credential "maas-credentials" added locally for cloud "maas-cloud".

3. Bootstrap Juju.

Add the flags --credential if you registered several MAAS credentials, and --debug if you want to see bootstrap details:

juju bootstrap --constraints tags=juju maas-cloud maas-controller

Deploy Charmed MySQL on MAAS

juju add-model mysql maas-cloud
juju deploy mysql --channel 8.0/candidate # MAAS supported since charm revision 234+

Sample juju status output:

Model  Controller       Cloud/Region        Version  SLA          Timestamp
mysql  maas-controller  maas-cloud/default  3.1.8    unsupported  12:57:06+02:00

App    Version          Status  Scale  Charm  Channel        Rev  Exposed  Message
mysql  8.0.36-0ubun...  active      1  mysql  8.0/candidate  234  no       

Unit      Workload  Agent  Machine  Public address  Ports           Message
mysql/1*  active    idle   1        10.10.10.7      3306,33060/tcp  Primary

Machine  State    Address     Inst id       Base          AZ       Message
1        started  10.10.10.7  pumped-racer  [email protected]  default  Deployed

Test your Charmed MySQL deployment

Check the Testing reference to test your deployment.

Clean up the environment

multipass stop maas

If you’re done with testing and would like to free up resources on your machine, you can remove the VM entirely.

To completely delete your VM and all its data, run:

multipass delete --purge maas