Molecule: No filter named 'molecule_from_yaml' on fresh Molecule

[a0s]

Issue Type

• Bug report

Molecule and Ansible details

ansible 2.7.9
  config file = /Users/a0s/.ansible.cfg
  configured module search path = [u'/Users/a0s/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/local/lib/python2.7/site-packages/ansible
  executable location = /usr/local/bin/ansible
  python version = 2.7.15 (default, Jan 12 2019, 21:43:48) [GCC 4.2.1 Compatible Apple LLVM 10.0.0 (clang-1000.11.45.5)]
molecule, version 2.19.0

Molecule installation method (one of):

• pip

Ansible installation method (one of):

• brew

Detail any linters or test runners used:

Desired Behavior

Idempotence completed successfully. message

Actual Behaviour

a0s@cto:~ [2.4.5 ] $ molecule init role --role-name my-role
--> Initializing new role my-role...
Initialized role in /Users/a0s/my-role successfully.

a0s@cto:~ [2.4.5 ] $ cd my-role/

a0s@cto:~/my-role [2.4.5 ] $ molecule test
--> Validating schema /Users/a0s/my-role/molecule/default/molecule.yml.
Validation completed successfully.
--> Test matrix

└── default
    ├── lint
    ├── destroy
    ├── dependency
    ├── syntax
    ├── create
    ├── prepare
    ├── converge
    ├── idempotence
    ├── side_effect
    ├── verify
    └── destroy

--> Scenario: 'default'
--> Action: 'lint'
--> Executing Yamllint on files found in /Users/a0s/my-role/...
Lint completed successfully.
--> Executing Flake8 on files found in /Users/a0s/my-role/molecule/default/tests/...
Lint completed successfully.
--> Executing Ansible Lint on /Users/a0s/my-role/molecule/default/playbook.yml...
Lint completed successfully.
--> Scenario: 'default'
--> Action: 'destroy'
 [WARNING]: Skipping plugin (/usr/local/lib/python2.7/site-
packages/molecule/provisioner/ansible/plugins/filters/molecule_core.py) as it
seems to be invalid: cannot import name py31compat


    PLAY [Destroy] *****************************************************************

    TASK [Destroy molecule instance(s)] ********************************************
    fatal: [localhost]: FAILED! => {"msg": "An unhandled exception occurred while templating '{{ lookup('file', molecule_file) | molecule_from_yaml }}'. Error was a <class 'ansible.errors.AnsibleError'>, original message: template error while templating string: no filter named 'molecule_from_yaml'. String: {{ lookup('file', molecule_file) | molecule_from_yaml }}"}

    PLAY RECAP *********************************************************************
    localhost                  : ok=0    changed=0    unreachable=0    failed=1

ERROR:
An error occurred during the test sequence action: 'destroy'. Cleaning up.
--> Scenario: 'default'
--> Action: 'destroy'
 [WARNING]: Skipping plugin (/usr/local/lib/python2.7/site-
packages/molecule/provisioner/ansible/plugins/filters/molecule_core.py) as it
seems to be invalid: cannot import name py31compat


    PLAY [Destroy] *****************************************************************

    TASK [Destroy molecule instance(s)] ********************************************
    fatal: [localhost]: FAILED! => {"msg": "An unhandled exception occurred while templating '{{ lookup('file', molecule_file) | molecule_from_yaml }}'. Error was a <class 'ansible.errors.AnsibleError'>, original message: template error while templating string: no filter named 'molecule_from_yaml'. String: {{ lookup('file', molecule_file) | molecule_from_yaml }}"}

    PLAY RECAP *********************************************************************
    localhost                  : ok=0    changed=0    unreachable=0    failed=1

ERROR:

[seandst]

 [WARNING]: Skipping plugin (/usr/local/lib/python2.7/site-
packages/molecule/provisioner/ansible/plugins/filters/molecule_core.py) as it
seems to be invalid: cannot import name py31compat

molecule_core.py provides the molecule_from_yaml filter. I'm guessing that the setuptools package is either outdated or not installed.

[a0s]

@seandst You're right! It works with fresh pyenv-virtualenv's environment. Also, i used python-3.7.2 and docker (not docker-py)

[seandst]

That's great news, since that was my only guess. :D

I'm glad it's working for you now.

[ssbarnea]

I get the same error about missing filther even when I do have recent setuptools but what makes it unique is that i always happens only when inside a virtualenv that is using site-packages. Seems very similar to https://github.com/ansible/molecule/issues/1888

[webknjaz]

FTR I'm hitting the same error with filter not found now.

[webknjaz]

Alright... It seems to be related to https://github.com/ansible/molecule/issues/2012.
This hints us that failure to import anyconfig prevents molecule_core.py filters from being loaded.

[WARNING]: Skipping plugin (/tmp/mol-test/mol_venv/lib/python3.7/site-packages/molecule/provisioner/ansible/plugins/filters/molecule_core.py) as it seems to be invalid: No module named 'anyconfig'

The interesting part is that anyconfig is installed in the same virtualenv as molecule itself.

[xsteadfastx]

im hitting the same error.... no warning for me... it just tells me

molecule converge                                                                                  37.3s  Mo 06 Mai 2019 08:43:31 CEST
--> Validating schema /home/preuss/src/server_provisioning/roles/testrolle/molecule/default/molecule.yml.
Validation completed successfully.
--> Test matrix

└── default
    ├── dependency
    ├── create
    ├── prepare
    └── converge

--> Scenario: 'default'
--> Action: 'dependency'
Skipping, missing the requirements file.
--> Scenario: 'default'
--> Action: 'create'

    PLAY [Create] ******************************************************************

    TASK [Log into a Docker registry] **********************************************
    fatal: [localhost]: FAILED! => {"msg": "An unhandled exception occurred while templating '{{ lookup('file', molecule_file) | molecule_from_yaml }}'. Error was a <class 'ansible.errors.AnsibleError'>, original message: template error while templating string: no filter named 'molecule_from_yaml'. String: {{ lookup('file', molecule_file) | molecule_from_yaml }}"}

    PLAY RECAP *********************************************************************
    localhost                  : ok=0    changed=0    unreachable=0    failed=1

ERROR:

did nothing fancy... just install molecule in a own venv, created a fresh role... and started to run it.

[webknjaz]

@xsteadfastx it would be very useful if you could record that with asciinema starting with molecule install and role generation...

[caleb15]

I got the same error, I was able to fix it by making sure molecule and ansible were both installed _not_ with the --user option.

[stdevel]

Thanks for the hintm @caleb15 - that actually helped on macOS 10.15.

[kuwv]

I'm not sure if I'm understanding this. If the work around is to install and run as root then this issue isn't fixed. If that's the case why is this closed?

[apatard]

I'm not sure if I'm understanding this. If the work around is to install and run as root then this issue isn't fixed. If that's the case why is this closed?

@kuwv this bug is about molecule 2.X. In molecule 3.X, the filter is not provided with molecule since 3.1.1 (https://github.com/ansible-community/molecule/pull/2869/)

[kuwv]

@apatard Well, guess that means there's a bug in molecule-ec2:

fatal: [localhost]: FAILED! => {"msg": "template error while templating string: no filter named 'molecule_from_yaml'. String: {{ lookup('file', molecule_instance_config) | molecule_from_yaml }}"}

Edit:
https://github.com/ansible-community/molecule-ec2/issues/33

[ssbarnea]

Someone needs to help with ec2 module maintenance, I added comment on https://github.com/ansible-community/molecule-ec2/pull/34#pullrequestreview-572472108 but I am unable to do it myself.

I can only help with reviews and releases, already overloaded.