Logrotate setup


How to setup logrotate


There are several applications which do not have in build capability to rotate the logs and purge the old logs.
Lets take example of apache, You may need to rotate its log and purge old one and zip the current one. It's not possible to truncate the apache log when its running, You will need to handle in via logotate command.
Here is the way you can setup logrotate for an application.

Here I am taking example of apache, You can change it as per your need




cat /etc/logrotate.conf

# keep 4 weeks worth of backlogs
rotate 4

 # create new (empty) log files after rotating old ones
create

 # uncomment this if you want your log files compressed
compress

 # packages drop log rotation information into this directory
include /etc/logrotate.d

 /etc/apache2/logs/access_log {
           rotate 5
           size 10000k
           sharedscripts
           postrotate
               /usr/bin/killall -HUP httpd
           endscript
       }

 /etc/apache2/logs/ssl_request_log {
           rotate 5
           size 10000k
           sharedscripts
           postrotate
               /usr/bin/killall -HUP httpd
           endscript
       }

 /etc/apache2/logs/error_log {
           rotate 5
           size 10000k
           sharedscripts
           postrotate
               /usr/bin/killall -HUP httpd
           endscript
       }

rotate
Log  files  are  rotated  count  times before being removed

 size 
Log files are rotated when they grow bigger than size bytes

 sharedscripts
prerotate and postrotate scripts are run for each log which is rotated

postrotate/endscript
 The  lines  between postrotate and endscript are executed after the log file is rotated

killall -HUP
The HUP signal ( "hangup signal") is usually sent to a program to restarts and re-reads all its configuration in the process.The Apache web server will catch a HUP signal and re-read all its configuration files but it won't restart any processes. But other process may behave differently, Some process may not catch HUP, and you may want to just use kill.

Now set a cron job as root user (or which ever can perform above job).

1 23 * * * logrotate /etc/logrotate.conf 2>&1 > /dev/null

This will run 1 pass 11pm every day.

Comments

Post a Comment

Popular posts from this blog

Colour formatting - Jenkins Console

Image
Jenkins is the main CI tool used in Software industry. This is the backbone tool for all CI and CD implementation, Build - release and deployment methods. With the help of 100s of plugin available around the jenkins, We can achieve so much of automation around build process including build/deployment pipeline, notification, analysis, pre and post build action etc. Jenkins has tremendous power to perform great amount of work around the core build process. Many time we write script in pre and post build action to perform many tasks which is becoming very command and necessary for automation. But the main limitation in running shell script is that it's very difficult to make it more human readable for errors and make it fancy. Today i am going to cover some steps to make the output of shell script colour formatted. Jenkins Configuration Steps First install following jenkins plugin https://wiki.jenkins-ci.org/display/JENKINS/AnsiColor+Plugin Go to jenkins configurati
Read more

Manage Docker images on local disk

Docker is very powerful containerization technique, and it is becoming famous in short time. People are adapting and containerizing their applications for deployment. Soon container become very heavy and consume too much of disk space, If you do not delete old images and layers you may soon run out of disk space. Here i am trying to cover the ways to regain the disk space consumed by docker images. Moving docker filesystem to bigger mount point. Usually docker keeps all temporary files related to image building and layers at /var/lib/docker This path is local to the system usually at root partition "/" . You can mount a bigger disk space and move the content of /var/lib/docker to the new mount location and make sym link.  This way even docker images occupy space, will not affect  your system as it will be using some other mount location. Remove Old docker images Here are few ways to remove old and unused docker images Removing stopped contai
Read more

How to migrate Parent pom from maven to gradle

Convert Maven parent/super pom to Gradle init file When you think of moving to gradle for some reason from maven, You need to take care of lot of stuff around it, You can find lot of tools and help to convert maven pom.xml to gradle build.gradle But one of the most important task as an engineer or architect would be to convert your super pom (or parent pom) in to gradle init scripts. Gradle init script provides same functionality as Maven super/parent pom. The basic difference is that you can call init script Run time As many as of them This gives us flexibility to change the init script on run time but doubt of not tracking the changes.
Read more