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Description: A stackable multienvironment directory layout for Ansible using unionfs. Check thisGithub project with demo data for the environments

There are three methods to run unionfs binary. From unionfs binary in the host, a docker container or a podman container.

Usingunionfs host binary

• unionfs-fuse

Using docker engine

• Docker
• Docker SDK for Python

Using podman engine

• Podman

• Seerequirements.txt

Define a stackable environment hierarchy inmultienv_union variable using a list. The last environment in the list has the most priority. For exampledev:

multienv_union:  -base  -dev

For exampledev:

multienv_union:  -base  -production

More than two directories can be stacked. For example, to stackstage over dev and base:

multienv_union:  -base  -dev  -stage

For the rest of variables:

• Seedefaults/main.yml.

• Centos: if using Centos and getting a message like'is mounted on / but it is not a shared mount', you may need to makemultienv_host_mountpoint a shared mount point withmount --make-rshared <multienv_host_mountpoint>. Replace<multienv_host_mountpoint> with the respective value
• Depends on other Ansible roles: no

-hosts:allroles:    -jobcespedes.multienv

Run it with docker:

ansible-playbook -i localhost, multienv.yml

Run it with podman:

# podman method requires sudoansible-playbook -i localhost, multienv.yml -e multienv_method=podman -K

Run it with binary in host:

ansible-playbook -i localhost, multienv.yml -e multienv_method=binary

Unmount it

ansible-playbook -i localhost, multienv.yml -e multienv_stop=true

Apache 2.0

Job Céspedes:jobcespedes@gmail.com