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A collection of 13 posts

Retrieving S3 Objects Using curl

Amazon S3 is a popular object storage service that allows you to store and retrieve data in the cloud. One way to interact with S3 is by using the AWS SDKs, but you can also use command line tools such as curl to retrieve objects. In this post, we will

ANSIBLE: PREPARING THE MANAGED NODE FOR ANSIBLE WITH ANSIBLE

ANSIBLE: PREPARING THE MANAGED NODE FOR ANSIBLE WITH ANSIBLE

If you are new to ansible I would recommend reading my previous article Ansible: Getting Started [https://www.googlinux.com/ansible-getting-started/] Ansible is agent less and works on SSH to manage and automate tasks on Linux nodes. We would also like this automation to be un-attended. To achieve this, managed

CREATING A OCI CONTAINER WITHIN DOCKER CONTAINER

CREATING A OCI CONTAINER WITHIN DOCKER CONTAINER

This title sounds funny, but I couldn't find a better one. :) As OCI 1.0 specification was released it no longer remains as just Docker Container, it is now Linux Container. There are tools being built around OCI specification like buildah, cri-o, skopeo and lot more to come. I will

DOCKER: MULTI-STAGE BUILDS

DOCKER: MULTI-STAGE BUILDS

Multi-stage builds is a new feature in Docker 17.05, and they will be exciting to anyone who has struggled to optimise Dockerfiles while keeping them easy to read and maintain. One of the most challenging things about building images is keeping the image size down. Each instruction in the

ANSIBLE 2.3: NEW MODULES

ANSIBLE 2.3: NEW MODULES

Soon after Ansible turned five, version 2.3 was released. There are a lot of new features in this version specifically related to networking. Like, Persistent connections framework, network_cli connection plugin and netconf connection plugin. There are 280+ new modules available in Ansible 2.3. Below is the list

ANSIBLE: RUN PLAY ONLY ON REACHABLE HOST

ANSIBLE: RUN PLAY ONLY ON REACHABLE HOST

During one of my Ansible trainings in Singapore one candidate asked me, is there some way that we execute the play only on reachable hosts. She also insisted that the playbook should show no errors. Showing errors would report the Job as failed in Ansible Tower. So, finally we came

CREATING A PRIVATE DOCKER REGISTRY

CREATING A PRIVATE DOCKER REGISTRY

ABOUT REGISTRY A registry is a repository of docker images. Docker by default points to Public Docker Registry which is also called as Docker Hub. docker search would list results from docker hub and more information about image is available on hub.docker.com You can upload your docker images

QUICKLY DEPLOY HADOOP CLUSTER USING DOCKER

QUICKLY DEPLOY HADOOP CLUSTER USING DOCKER

Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage. Installing, configuring and adding new datanodes to

MICROSOFT SQL SERVER AS A DOCKER CONTAINER

MICROSOFT SQL SERVER AS A DOCKER CONTAINER

Nobody could have ever imagined Microsoft SQL Server running on Linux. I appreciate the foresight of Satya Nadella, CEO Microsoft embracing Linux and OpenSource. Now as Microsoft SQL Server vNext CTP 1.1 is available for Ubuntu, RHEL7 & CentOS7, how about running it as a container. To run SQL Server

CREATING DOCKER CONTAINER USING ANSIBLE

CREATING DOCKER CONTAINER USING ANSIBLE

Ansible and Docker have acquired a larger share among DevOps products & tools. So how about creating a generic ansible playbook to deploy a docker container. > If you are new to Ansible, I would recommend you to go through Ansible: Getting Started [http://googlinux.com/ansible-getting-started/]. We start our playbook by

ANSIBLE: GETTING STARTED

ANSIBLE: GETTING STARTED

WHAT IS ANSIBLE? Ansible was originally written by Michael DeHaan in Python with its first release on February 20, 2012. It was later acquired by Red Hat. Ansible is an open source configuration management and orchestration utility. It helps to automate deployment or softwares and configurations of multiple remote hosts.

HOW TO LIST ALL TAGS OF A DOCKER IMAGE

HOW TO LIST ALL TAGS OF A DOCKER IMAGE

DOCKER SEARCH To search a image on docker remote registry you can use docker search command. Example: root@googlinux.com:~# docker search ubuntu NAME DESCRIPTION STARS OFFICIAL AUTOMATED ubuntu Ubuntu is a Debian-based Linux operating s... 4482 [OK] ubuntu-upstart Upstart is an event-based replacement for ... 65 [OK] rastasheep/ubuntu-sshd Dockerized

HOW TO UPDATE ALL DOCKER IMAGES

Docker does not have a command to update images that you have already pulled. The only way is to pull all images again using docker pull command. This simple one-liner can help you update all images at once. docker images |grep -v REPOSITORY|awk '{print $1}'|xargs -L1