doc: add a note about containerized deployments

This commit updates the documentation to add a note about containerized
deployments.
Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit e6148850)

docs/source/installation/containerized.rst

+Containerized deployment
+========================
+
+Ceph-ansible supports docker and podman only in order to deploy Ceph in a containerized context.
\ No newline at end of file

docs/source/installation/methods.rst

 Installation methods
 ====================
 
-The following are all of the available options for the installing Ceph through different channels.
+ceph-ansible can deploy Ceph either in a non-containerized context (via packages) or in a containerized context using ceph-container images.
 
-We support 3 main installation methods, all managed by the ``ceph_origin`` variable:
+.. toctree::
+   :maxdepth: 1
 
-- ``repository``: means that you will get Ceph installed through a new repository. Later below choose between ``community``, ``rhcs`` or ``dev``. These options will be exposed through the ``ceph_repository`` variable.
-- ``distro``: means that no separate repo file will be added and you will get whatever version of Ceph is included in your Linux distro.
-- ``local``: means that the Ceph binaries will be copied over from the local machine (not well tested, use at your own risk)
-
-Origin: Repository
-------------------
-
-If ``ceph_origin`` is set to ``repository``, you now have the choice between a couple of repositories controlled by the ``ceph_repository`` option:
-
-- ``community``: fetches packages from http://download.ceph.com, the official community Ceph repositories
-- ``rhcs``: means you are a Red Hat customer, additionally you will have to select a repository type through ``ceph_repository_type`` (``cdn`` or ``iso``)
-- ``dev``: fetches packages from shaman, a gitbuilder based package system
-- ``uca``: fetches packages from Ubuntu Cloud Archive
-- ``custom``: fetches packages from a specific repository
-
-Community repository
-~~~~~~~~~~~~~~~~~~~~
-
-If ``ceph_repository`` is set to ``community``, packages you will be by default installed from http://download.ceph.com, this can be changed by tweaking ``ceph_mirror``.
-Final step is to select which Ceph release you want to install, for this you have to set ``ceph_stable_release`` accordingly.
-For example, ``ceph_stable_release: luminous``.
-
-RHCS repository
-~~~~~~~~~~~~~~~
-
-RHCS is the Red Hat Ceph Storage product from Red Hat, the enterprise version of Ceph.
-If ``ceph_repository`` is set to ``rhcs``, packages you will be installed from Red Hat sources.
-
-Additionally you will have to select a repository type through ``ceph_repository_type``, it can be ``cdn`` or ``iso``.
-To choose a specific version of RHCS you can set the ``ceph_rhcs_version`` variable accordingly, e.g: ``ceph_rhcs_version: 2``.
-
-UCA repository
-~~~~~~~~~~~~~~
-
-If ``ceph_repository`` is set to ``uca``, packages you will be by default installed from http://ubuntu-cloud.archive.canonical.com/ubuntu, this can be changed by tweaking ``ceph_stable_repo_uca``.
-You can also decide which OpenStack version the Ceph packages should come from by tweaking ``ceph_stable_openstack_release_uca``.
-For example, ``ceph_stable_openstack_release_uca: queens``.
-
-Dev repository
-~~~~~~~~~~~~~~
-
-If ``ceph_repository`` is set to ``dev``, packages you will be by default installed from https://shaman.ceph.com/, this can not be tweaked.
-You can obviously decide which branch to install with the help of  ``ceph_dev_branch`` (defaults to 'master').
-Additionally, you can specify a SHA1 with ``ceph_dev_sha1``, defaults to 'latest' (as in latest built).
-
-Custom repository
-~~~~~~~~~~~~~~~~~
-
-If ``ceph_repository`` is set to ``custom``, packages you will be by default installed from a desired repository.
-This repository is specifie with ``ceph_custom_repo``, e.g: ``ceph_custom_repo: https://server.domain.com/ceph-custom-repo``.
-
-
-Origin: Distro
---------------
-
-If ``ceph_origin`` is set to ``distro``, no separate repo file will be added and you will get whatever version of Ceph is included in your Linux distro.
-
-
-Origin: Local
--------------
-
-If ``ceph_origin`` is set to ``local``, the ceph binaries will be copied over from the local machine (not well tested, use at your own risk)
+   non-containerized
+   containerized

docs/source/installation/non-containerized.rst

+Non containerized deployement
+=============================
+
+The following are all of the available options for the installing Ceph through different channels.
+
+We support 3 main installation methods, all managed by the ``ceph_origin`` variable:
+
+- ``repository``: means that you will get Ceph installed through a new repository. Later below choose between ``community``, ``rhcs`` or ``dev``. These options will be exposed through the ``ceph_repository`` variable.
+- ``distro``: means that no separate repo file will be added and you will get whatever version of Ceph is included in your Linux distro.
+- ``local``: means that the Ceph binaries will be copied over from the local machine (not well tested, use at your own risk)
+
+Origin: Repository
+------------------
+
+If ``ceph_origin`` is set to ``repository``, you now have the choice between a couple of repositories controlled by the ``ceph_repository`` option:
+
+- ``community``: fetches packages from http://download.ceph.com, the official community Ceph repositories
+- ``rhcs``: means you are a Red Hat customer, additionally you will have to select a repository type through ``ceph_repository_type`` (``cdn`` or ``iso``)
+- ``dev``: fetches packages from shaman, a gitbuilder based package system
+- ``uca``: fetches packages from Ubuntu Cloud Archive
+- ``custom``: fetches packages from a specific repository
+
+Community repository
+~~~~~~~~~~~~~~~~~~~~
+
+If ``ceph_repository`` is set to ``community``, packages you will be by default installed from http://download.ceph.com, this can be changed by tweaking ``ceph_mirror``.
+Final step is to select which Ceph release you want to install, for this you have to set ``ceph_stable_release`` accordingly.
+For example, ``ceph_stable_release: luminous``.
+
+RHCS repository
+~~~~~~~~~~~~~~~
+
+RHCS is the Red Hat Ceph Storage product from Red Hat, the enterprise version of Ceph.
+If ``ceph_repository`` is set to ``rhcs``, packages you will be installed from Red Hat sources.
+
+Additionally you will have to select a repository type through ``ceph_repository_type``, it can be ``cdn`` or ``iso``.
+To choose a specific version of RHCS you can set the ``ceph_rhcs_version`` variable accordingly, e.g: ``ceph_rhcs_version: 2``.
+
+UCA repository
+~~~~~~~~~~~~~~
+
+If ``ceph_repository`` is set to ``uca``, packages you will be by default installed from http://ubuntu-cloud.archive.canonical.com/ubuntu, this can be changed by tweaking ``ceph_stable_repo_uca``.
+You can also decide which OpenStack version the Ceph packages should come from by tweaking ``ceph_stable_openstack_release_uca``.
+For example, ``ceph_stable_openstack_release_uca: queens``.
+
+Dev repository
+~~~~~~~~~~~~~~
+
+If ``ceph_repository`` is set to ``dev``, packages you will be by default installed from https://shaman.ceph.com/, this can not be tweaked.
+You can obviously decide which branch to install with the help of  ``ceph_dev_branch`` (defaults to 'master').
+Additionally, you can specify a SHA1 with ``ceph_dev_sha1``, defaults to 'latest' (as in latest built).
+
+Custom repository
+~~~~~~~~~~~~~~~~~
+
+If ``ceph_repository`` is set to ``custom``, packages you will be by default installed from a desired repository.
+This repository is specifie with ``ceph_custom_repo``, e.g: ``ceph_custom_repo: https://server.domain.com/ceph-custom-repo``.
+
+
+Origin: Distro
+--------------
+
+If ``ceph_origin`` is set to ``distro``, no separate repo file will be added and you will get whatever version of Ceph is included in your Linux distro.
+
+
+Origin: Local
+-------------
+
+If ``ceph_origin`` is set to ``local``, the ceph binaries will be copied over from the local machine (not well tested, use at your own risk)