ansible: Bump the minimum Ansible version to 2.10+

It's getting harder to get around with only the builtin modules and
we'll need to use some of the curated community modules. The split of
Ansible into 'ansible-core' and 'ansible community (aka ansible)'
happened in v2.10. The way this patch enforces the version used in by
delegating a version check task to localhost, failing if the control
node doesn't meet the minimum version. 2.10 is pretty common these
days, so essentially only users on Debian-10 would be impacted by
this, but then again, installing from PyPI is a simple workaround in
that case.

Signed-off-by: Erik Skultety <eskultet@redhat.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/docs/installation.rst b/docs/installation.rst
index 9d60463..e608ca0 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -56,7 +56,13 @@ single step with:
    $ pip3 install .["vm_support"]
 
 where ``vm_support`` denotes the same set of dependencies as extra dependencies
-in a way ``pip`` recognizes for installable packages.
+in a way ``pip`` recognizes for installable packages. Additionally, for the
+VM use case we require some of the *general* Ansible community modules, so
+**Ansible >= 2.10** along with the corresponding Ansible community collections
+package (often called simply ``ansible``) is required. This is only relevant if
+you install most of your packages from the OS package management software. If
+you use the ``pip`` method no action is needed, it'll do the right thing.
+
 
 Development dependencies
 ~~~~~~~~~~~~~~~~~~~~~~~~