diff --git a/docs/getting-started-guides/ubuntu/logging-2017-7-15.md b/docs/getting-started-guides/ubuntu/logging-2017-7-15.md new file mode 100644 index 0000000000000..ae7237a0a764a --- /dev/null +++ b/docs/getting-started-guides/ubuntu/logging-2017-7-15.md @@ -0,0 +1,60 @@ +--- +title: Logging +--- + +{% capture overview %} +This page will explain how logging works within a Juju deployed cluster. +{% endcapture %} + +{% capture prerequisites %} +This page assumes you have a working Juju deployed cluster. +{% endcapture %} + + +## Agent Logging + +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. + +See the [Juju documentation](https://jujucharms.com/docs/stable/troubleshooting-logs) for more information. + + +## Managing log verbosity + +Log verbosity in Juju is set at the model level. You can adjust it at any time: + +``` +juju add-model k8s-development --config logging-config='=DEBUG;unit=DEBUG' +``` + +and later + +``` +juju config-model k8s-production --config logging-config='=ERROR;unit=ERROR' +``` + +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. + +It then contains: + +``` +#!/usr/bin/env bash + +# Set up logging. +touch '/var/log/juju/machine-0.log' +chown syslog:syslog '/var/log/juju/machine-0.log' +chmod 0600 '/var/log/juju/machine-0.log' +exec >> '/var/log/juju/machine-0.log' +exec 2>&1 + +# Run the script. +'/var/lib/juju/tools/machine-0/jujud' machine --data-dir '/var/lib/juju' --machine-id 0 # --debug +``` + +Then restart the service with: + +``` +sudo systemctl restart jujud-machine-0.service +``` + +See the [official documentation](https://jujucharms.com/docs/stable/models-config) for more information about logging and other model settings in Juju. +