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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...
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Setup Docker slaves for Jenkins

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Jenkins is the one of the primary CI tool used in industry. Jenkins provide on cross planform support and have master-slave configuration. Your slave could be any operating system. Recently docker is becoming very popular for replacement of virtualisation up to some extend. Today I will detail out the steps needed to make  dynamically slave provision via docker images . Setting up Host for Docker You need to have your base machine either VM or hypervisor etc and need to install with all prerequisite. Lets install docker now. curl -sSL https://get.docker.com/ | sh
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Colour formatting - Jenkins Console

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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...
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