61 lines
1.8 KiB
Markdown
61 lines
1.8 KiB
Markdown
---
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title: Logging
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---
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{% capture overview %}
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This page will explain how logging works within a Juju deployed cluster.
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{% endcapture %}
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{% capture prerequisites %}
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This page assumes you have a working Juju deployed cluster.
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{% endcapture %}
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## Agent Logging
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The `juju debug-log` will show all of the consolidated logs of all the Juju agents running on each node of the cluster. This can be useful for finding out why a specific node hasn't deployed or is in an error state. These agent logs are located in `/var/lib/juju/agents` on every node.
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See the [Juju documentation](https://jujucharms.com/docs/stable/troubleshooting-logs) for more information.
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## Managing log verbosity
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Log verbosity in Juju is set at the model level. You can adjust it at any time:
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```
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juju add-model k8s-development --config logging-config='<root>=DEBUG;unit=DEBUG'
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```
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and later
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```
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juju config-model k8s-production --config logging-config='<root>=ERROR;unit=ERROR'
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```
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In addition, the jujud daemon is started in debug mode by default on all controllers. To remove that behavior edit ```/var/lib/juju/init/jujud-machine-0/exec-start.sh``` on the controller node and comment the ```--debug``` section.
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It then contains:
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```
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#!/usr/bin/env bash
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# Set up logging.
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touch '/var/log/juju/machine-0.log'
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chown syslog:syslog '/var/log/juju/machine-0.log'
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chmod 0600 '/var/log/juju/machine-0.log'
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exec >> '/var/log/juju/machine-0.log'
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exec 2>&1
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# Run the script.
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'/var/lib/juju/tools/machine-0/jujud' machine --data-dir '/var/lib/juju' --machine-id 0 # --debug
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```
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Then restart the service with:
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```
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sudo systemctl restart jujud-machine-0.service
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```
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See the [official documentation](https://jujucharms.com/docs/stable/models-config) for more information about logging and other model settings in Juju.
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