How to use logging

[billwear]

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Checking Logs in Systemd (MAAS 3.5 and Newer)

Starting with version 3.5, MAAS logs are saved in systemd. Use these commands to view the logs based on how you installed MAAS (snap or Debian packages):

Region Controller Logs

• Snap: journalctl -u snap.maas.pebble -t maas-regiond

• Debian: journalctl -u maas-regiond

Rack Controller Logs

• Snap: journalctl -u snap.maas.pebble -t maas-rackd

• Debian: journalctl -u maas-rackd

Agent Logs

• Snap: journalctl -u snap.maas.pebble -t maas-agent

• Debian: journalctl -u maas-agent

API Server Logs

• Snap: journalctl -u snap.maas.pebble -t maas-apiserver

• Debian: journalctl -u maas-apiserver

Filtering Logs by Machine Name

To search for logs by machine name (hostname):

journalctl -u snap.maas.pebble -t maas-machine --since "-15m" MAAS_MACHINE_HOSTNAME=ace-cougar

Checking Logs Before MAAS 3.5

Before version 3.5, MAAS saved logs in custom files. Here are some examples:

• Region Controller: /var/snap/maas/common/log/regiond.log or /var/log/maas/regiond.log

• Rack Controller: /var/snap/maas/common/log/rackd.log or /var/log/maas/rackd.log

• Proxy: /var/snap/maas/common/log/proxy/access.log

Using the less Command to Read Logs

less /var/snap/maas/common/log/regiond.log

How to Read Event Logs

Using the UI

1. Go to the Machines list in the UI.

2. Click on a machine and select the Events tab.

To see more details, click View full history.

Using the Command Line

maas $PROFILE events query

Formatting Event Logs with jq

To format the output neatly with jq:

maas admin events query | jq -r '(["HOSTNAME","TIMESTAMP","TYPE","DESCRIPTION"] | (., map(length*"-"))), (.events[] | [.hostname, .created, .type, .description // "-"]) | @tsv' | column -t -s $'\t'

How to Read Commissioning Logs

Using the UI

1. Go to the Commissioning tab of a machine.

2. Click the links to see the detailed logs.

Using the Command Line

maas $PROFILE node-script-result read $SYSTEM_ID $RESULTS

How to Read Testing Logs

Example Command:

maas $PROFILE node-script-result read $SYSTEM_ID type=smartctl-validate