By Daniel Hall
Leverage the facility of Ansible to regulate your infrastructure efficiently
About This Book
- Configure Ansible in your Linux and home windows machines effectively
- Extend Ansible so as to add positive aspects corresponding to looping, conditional executions, and job delegations
- Explore the features of Ansible from uncomplicated to extra complex issues with assistance from this step by step guide
Who This publication Is For
This booklet is meant for a person who desires to study Ansible ranging from the fundamentals. a few adventure of ways to establish and configure Linux machines and a operating wisdom of BIND, MySQL, and different Linux daemons is expected.
What you are going to Learn
- Manage your home windows machines with Ansible
- Use Ansible's command-line instruments to interrogate systems
- Interact with modules and install cloud infrastructures
- Process facts inside of Ansible and expand the performance of Ansible
- Learn tips on how to shop secrets and techniques in Ansible's vault and notice different resource code administration techniques
- Build maintainable configurations for giant environments
- Write customized Ansible plugins efficiently
- Extend the performance of Ansible via writing your individual modules
Ansible is an open resource software program platform for configuring and handling pcs. It offers a transparent and concise solution to deal with the configuration of your Linux infrastructure. This e-book is a step by step consultant that gives you with the information you require to successfully deal with your structures in an easy, speedy, and maintainable means, with real-world examples.
You will commence via studying the fundamentals of Ansible after which circulate directly to exploring extra complicated themes. you'll then research the elemental and complicated operations of playbooks and engage with modules to regulate home windows machines and set up them. additionally, you will get familiar with Ansible's extra complex positive aspects resembling serially updating machines, delegating initiatives to different machines, complicated makes use of of variables, looping and stipulations, copying complete directories, and utilizing filters to strategy variables. in the direction of the tip of the booklet, you are going to the best way to bring up the performance of Ansible itself by way of writing your individual modules and plugins.
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Extra resources for Ansible Configuration Management
This allows us to trigger many handlers from a single step in the task list. For example, if we have just checked out a newer version of any Django application, we can set a handler to migrate the database, deploy the static files, and restart Apache. We can do this by simply using a YAML list on the notify action. py collectstatic -c –noinput args: chdir: /opt/apps/Qroud - name: restart httpd service: name: httpd state: restarted We can see that the git module is used to check out some public GitHub code, and if that caused anything to change, it triggers the migrate db, generate static, and restart httpd actions.
This allows you to perform more complex tasks than you could do with single modules alone. [ 15 ] Simple Playbooks Ansible can be used as a command-line tool for making small changes. However, its real power lies in its scripting abilities. While setting up machines, we almost always need to do more than one thing at a time. Ansible uses a concept named playbook to do this. Using playbooks, we can perform many actions at once, and across multiple systems. They provide a way to orchestrate deployments, ensure a consistent configuration, or simply perform a common task.
The group_by module can create groups based on the facts about the machines, including the ones we set up ourselves using the add_fact module explained earlier. The group_by module accepts one argument, key, which takes the name of a group the machine will be added to. By combining this with the use of variables, we can make the module add a server to a group based on its operating system, virtualization technology, or any other fact that we have access to. We can then use this group in the target section of any subsequent plays, or in templates.
Ansible Configuration Management by Daniel Hall