by Kamran Kanwar Siraj
Ansible DevOps Tool and a configuration management tool that is like to Chef and Puppet. We know that puppet and chef probably have a richer feature set but simplicity was the desired objective. We see some tradeoffs between configuration management using Ansible and the option to simply kill and spin new application instances using a Docker container. With Docker, we need not upgrade machines but choose to spin new machines, which reduces the need to upgrade the EC2 cloud instances. Ansible is used mostly for deployment configuration. We use it to push changes and re-configure newly deployed machines. Additionally the ecosystem is great, with an easy option to write custom applications.
Simple IT Automation
Push-Model by Default
Modules are Ansible’s way of obstracting certain system management or configuration tasks. Ansible is able to make system management idempotent. This is a key concept that makes configuration management tools like Ansible more powerful and safe than any custom shell script. It is actually challenging o write a shell script that can configure a system to a particular state.
There is a large catalog of modules available for Ansible out of box. Here is a sample of things that can be managed with Ansible modules:
If there is no specific module available to accomplish, it can be run with some arbitrary commands or create own custom module.
Ansible container enables you to build container images and orchestrate those using only Ansible play books. It provides an Ansible-centric work flow for building, testing and installing containers. We can describe application in a single YAML file and, rather than using a Dockerfile, list Ansible roles that make up your container images.
With Ansible container, you no longer have to build and configure containers differently than you do traditional VM or bare-metal systems. We can apply the powers of Ansible and re-use your existing Ansible content for your containerized ecosystem. We can also use the templates to copy files, drop on encrypted data, handle errors, add conditions and more. The whole thing Ansible fetches to orchestrating the infrastructure can be applied to the image build process.
Use Ansible containers to run the applications and push images to private and public registries. When you are ready to deploy to the cloud, use it to generate an Ansible play book that automates the deployment.
Ansible believes you do not need another framework to validate basic things. As Ansible is an order-based system that will fail instantaneously on unhandled errors for a host, and prevent further configuration of that host. However, as Ansible is designed as a multi-tier orchestration system, it makes it stress-free to incorporate tests into the end of a play book run, either using lose tasks or roles.
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Overall, testing is a very organizational and site-specific thing. Everybody should make the most for your environment by deploying and benefit from a more robust and reliable deployment system. For more information on how we apply these kind of open source technologies, email us at email@example.com or visit www.royalcyber.com.