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describe what ansible-core is (#73829)

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docs/docsite/rst/core_index.rst
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@ -12,6 +12,12 @@ About ansible-core
Ansible is an IT automation tool. It can configure systems, deploy software, and orchestrate more advanced IT tasks such as continuous deployments or zero downtime rolling updates. Ansible is an IT automation tool. It can configure systems, deploy software, and orchestrate more advanced IT tasks such as continuous deployments or zero downtime rolling updates.
Ansible core, or ``ansible-core`` is the main building block and architecture for Ansible, and includes:
* CLI tools such as ``ansible-playbook``, ``ansible-doc``. and others for driving and interacting with automation.
* The Ansible language that uses YAML to create a set of rules for developing Ansible Playbooks and includes functions such as conditionals, blocks, includes, loops, and other Ansible imperatives.
* An architectural framework that allows extensions through Ansible collections.
Ansible's main goals are simplicity and ease-of-use. It also has a strong focus on security and reliability, featuring a minimum of moving parts, usage of OpenSSH for transport (with other transports and pull modes as alternatives), and a language that is designed around auditability by humans--even those not familiar with the program. Ansible's main goals are simplicity and ease-of-use. It also has a strong focus on security and reliability, featuring a minimum of moving parts, usage of OpenSSH for transport (with other transports and pull modes as alternatives), and a language that is designed around auditability by humans--even those not familiar with the program.
We believe simplicity is relevant to all sizes of environments, so we design for busy users of all types: developers, sysadmins, release engineers, IT managers, and everyone in between. Ansible is appropriate for managing all environments, from small setups with a handful of instances to enterprise environments with many thousands of instances. We believe simplicity is relevant to all sizes of environments, so we design for busy users of all types: developers, sysadmins, release engineers, IT managers, and everyone in between. Ansible is appropriate for managing all environments, from small setups with a handful of instances to enterprise environments with many thousands of instances.
@ -20,7 +26,7 @@ You can learn more at `AnsibleFest <https://www.ansible.com/ansiblefest>`_, the
Ansible manages machines in an agent-less manner. There is never a question of how to upgrade remote daemons or the problem of not being able to manage systems because daemons are uninstalled. Because OpenSSH is one of the most peer-reviewed open source components, security exposure is greatly reduced. Ansible is decentralized--it relies on your existing OS credentials to control access to remote machines. If needed, Ansible can easily connect with Kerberos, LDAP, and other centralized authentication management systems. Ansible manages machines in an agent-less manner. There is never a question of how to upgrade remote daemons or the problem of not being able to manage systems because daemons are uninstalled. Because OpenSSH is one of the most peer-reviewed open source components, security exposure is greatly reduced. Ansible is decentralized--it relies on your existing OS credentials to control access to remote machines. If needed, Ansible can easily connect with Kerberos, LDAP, and other centralized authentication management systems.
This documentation covers the version of Ansible noted in the upper left corner of this page. We maintain multiple versions of Ansible and of the documentation, so please be sure you are using the version of the documentation that covers the version of Ansible you're using. For recent features, we note the version of Ansible where the feature was added. This documentation covers the version of ``ansible-core`` noted in the upper left corner of this page. We maintain multiple versions of ``ansible-core`` and of the documentation, so please be sure you are using the version of the documentation that covers the version of Ansible you're using. For recent features, we note the version of Ansible where the feature was added.
``ansible-core`` releases a new major release approximately twice a year. The core application evolves somewhat conservatively, valuing simplicity in language design and setup. Contributors develop and change modules and plugins, hosted in collections since version 2.10, much more quickly. ``ansible-core`` releases a new major release approximately twice a year. The core application evolves somewhat conservatively, valuing simplicity in language design and setup. Contributors develop and change modules and plugins, hosted in collections since version 2.10, much more quickly.