Firstly, Ansible is simple open-source IT engine that automates application deployment, infra service orchestration, cloud provisioning and many other IT devices.
Secondly, Ansible uses playbook to define automation jobs, and playbook use very simple language i.e. Hence the profit is that even the IT infrastructure maintenance people can know and understand the playbook and debug if needed (YAML – It is in human-readable form).
In conclusion, After relating to your nodes, Ansible pushes small programs called “Ansible Modules”. Ansible manages your index in simple text files (These are the host’s files). Ansible uses the host’s file where one can group the hosts and can control the actions on a specific group in the playbooks.
What is Configuration Management
However, Configuration management in terms of Ansible means that it manages the configuration of the product review by keeping a record and updating detailed information which describes an enterprise’s tools. Run the playbook from your Ansible controller machine and execute it.
Ansible – Ad hoc Commands
moreoever, Ad hoc commands are commands which can be run individually to use single action like if you want to install/update/remove the package the production we don’t use Ad hoc commands and the biggest disadvanta
Ansible – Playbooks
Finally, Playbooks are one of the core features of Ansible. They are like a to-do list for Ansible that includes a schedule of tasks.
Similarly, Playbooks contain the actions which the user wants to perform on a singular device.Playbooks are the structure segments for everything the use cases of Ansible.
Ansible Playbook Structure
However, Each playbook is a gathering of one or more shows in it.
In other words, The function of a play is to map a set of instructions determined against a particular host.
Ansible : The Different YAML Tags
Let us now go within the different YAML tags.
Name
This tag defines the title of the Ansible playbook. Being in whatever this playbook will be doing logical name will be given to the playbook.
hosts
This tag specifies the lists of hosts or host groups against which we want to run the task. The host’s field/label is necessary.
In Addition, It explains Ansible receives to run the scheduled tasks. The task can be run on the same machine on a remote device.
vars
Vars label lets you define the variables which you can use in your playbook. Usage is similar to variables in any programming language.
tasks
All playbooks should require tasks or a list of tasks to be executed. Tasks are a program of actions one needs to perform.
In addition, A tasks field will include the title of the task. It runs as the maintenance topic for the user. Each task internally links to a piece of code called module arguments will require the module you want to execute.
Roles
Finally, Roles present a structure fully or interdependent combinations from variables, responsibilities, lists, templates, and modules.
Secondly, In Ansible, the purpose is the device for separating a playbook into multiple lines. It simplifies addressing multiple playbooks, and this makes them more comfortable to reuse. The division of the playbook permits you to reasonably occurred the playbook into reusable segments.
In Addition, Roles make not playbooks. There is no way to immediately perform roles. Roles have no specific background for which host the role will use.
In conclusion, Top-level playbooks remain the platform containing the hosts from your inventory list to roles that should implemented to those hosts.
Variable
Variable in playbooks are related to using variables in any programming language. In Addition, It helps you practice and select a condition to a variable and use that everywhere in the playbook.
Loops
Below is a standard to describe the method of Loops in Ansible.
Firstly, The task is to copy set all the war files from one record to the tomcat web apps folder. Here, we will focus on the usage of loops.
Secondly, in the ‘shell’ command, we have done ls *.war.
The output of that command taken in a variable named output.
to loop, the ‘with_items’ syntax.
with_items: “{{output.stdout_lines}}” –> output.stdout_lines gives us the line by line output then we loop on the output with the with_items command of Ansible.