DevOps.... CI/CD

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...

docker-maven-plugin is the great plugin provided by spotify to build docker image during maven build. There is very strange error or behaviour I have seen during the image creation. Plugin expects that image which Dockerfile is pulling needs to be passed with username and password, which should not an essential parameter as most of the images does not need any auth to be downloaded.  You may see this error [INFO] Building image your-application:0.0.3 Step 1 : FROM ubunt:latest [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] your-application..................................... FAILUER [ 3.619 s] [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 39.938 s (Wall Clock) [INFO] Finished at: 2016-06-25T16:26:06+00:00 [INFO] Final Memory: 65M/1216M [INF...

Summary: Managing the configuration of Jenkins—the popular open source, continuous integration and continuous delivery application—is not trivial. Even a small change can make the platform less stable or result in problems. Vishal Sahasrabuddhe talks about his experiences using Jenkins and offers tips to take advantage of its many powerful features to automate deployment and increase productivity and product quality. (Originally published on  cmcrossroads.com ) Configuration management requires that you automate application build, package, and deployment. There are many tools used to accomplish these tasks, but Jenkins is one of the most popular open source frameworks employed by teams today. Jenkins is widely used by developers to automate not only application procedures, but also continuous integration and continuous delivery. It comes with many powerful built-in features, and there are also hundreds of plugins that help it integrate with other tools and p...

Lessons Learned in Jenkins Management : Managing the configuration of Jenkins is not trivial; even a small change can make the platform less stable or result in problems. Vishal Sahasrabuddhe talks about his real-world experiences with Jenkins and details how to take advantage of its many powerful features while avoiding possible pitfalls.

Providing effective training is an art form. It requires much dedication and skill to engage your students so they believe they have benefited. Simple presentations can feel dull and unengaging, making the topic less interesting and many times leading to little or no knowledge transfer, even if the subject was covered correctly and the information was spot on. Gaining—and keeping—the interest of your audience is paramount in any successful training program. Here are a few essentials to consider when creating your presentation to make it more effective: Start with the basics

Inmobi is a Mobile Advertising organization and making a huge impact all over the Market. I would like to talk about some of my personal experience working with Inmobi as an employee. Work culture - Just one word, awesome. They have lots of work with tight deadlines, but employee rarely need to compromise with their personal life. Inmobi work policies are really employee friendly in all aspects. Its great to work together with like minded freaks to disrupt the market.

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