Llama Charmers Next Logrotated

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Overview

logrotate is a subordinate charm that ensure that all logrotate.d configurations within /etc/logrotate.d/ folder are modified accordingly to a retention period defined in the charm

Build

cd charm-logrotate                                                                  
charm build

Usage

Add to an existing application using juju-info relation.

Example:

juju deploy ubuntu
juju deploy ./charm-logrotate
juju add-unit ubuntu
juju add-relation ubuntu logrotate

Configuration

The user can configure the following parameters:

• logrotate-retention (default: 180): The logrotate retention period in days. The charm will go through ALL logrotate entries in /etc/logrotate.d/ and set the rotate config to the appropriate value, depending on the rotation interval used. For example if rotation is monthy and retention is 180 days -> rotate 6 or rotation is daily and retention is 90 days -> rotate 90 or rotation is weekly and retention is 21 days -> rotate 3 Weekly will round up the week count, for example if retention is set to 180 days -> rotate 26 (26 weeks x 7 days = 182 days) Yearly will put rotate to 1 and increase it with 1 for each 360 days. Monthly will round up, using 30 days for a month. Yearly will round up, adding a year for each 360 days.

• override: (default: []): JSON formatted field containing a list of files that need to have custom logrotate interval and count. The format is as follows: [ {"path": "/etc/logrotate.d/rotatefile", "rotate": 5, "interval": "weekly"}, {}, ... ]

Mind the double quotes for the properties/values!

Valid options for rotate: any integer value
Valid options for interval: 'daily', 'weekly', 'monthly', 'yearly'

Testing

Unit tests have been developed to test return values from the charm helper class, while modifying pre-defined string entries with the logrotate syntax.

To run unit tests:

tox -e unit

Functional tests have been developed using python-libjuju, deploying a simple ubuntu charm and adding logortate as a subordinate.

To run tests using python-libjuju:

tox -e functional

Contact Information

Diko Parvanov diko.parvanov@canonical.com