Issue in starting mrsm stack

[lrangar]

Hello,

I recently installed Meerschaum and I am trying to start the mrsm stack using the command: mrsm stack up -d db. However, I am getting the following error:

meerschaum.utils.venv:65
Activating virtual environment 'None'...
Traceback (most recent call last):
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/actions/_entry.py", line 84, in _entry_with_args
    result = action_function(**kw)
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/actions/stack.py", line 61, in stack
    write_stack(debug=debug)
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/config/stack/__init__.py", line 224, in write_stack
    general_write_yaml_config(get_necessary_files(), debug=debug)
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/config/stack/__init__.py", line 211, in get_necessary_files
    get_config('stack', STACK_COMPOSE_FILENAME, substitute=True), compose_header
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/config/__init__.py", line 183, in get_config
    _sync_files(keys=[keys[0]])
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/config/_sync.py", line 166, in sync_files
    key_functions[k]()
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/config/_sync.py", line 138, in _stack
    sync_yaml_configs(
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/config/_sync.py", line 107, in sync_yaml_configs
    sub_config = search_and_substitute_config(sub_config)
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/config/_read_config.py", line 254, in search_and_substitute_config
    _find_symlinks(config)
  File "/home/lrangar/.local/lib/python3.8/site-packages/meerschaum/config/_read_config.py", line 248, in _find_symlinks
    for k, v in d.items():
AttributeError: 'NoneType' object has no attribute 'items'

 💢 Failed to execute 'stack up' with exception:
    
    'NoneType' object has no attribute 'items'.

I created a virtual environment and activated it, yet the issue is resolved.
My python version is

Python 3.8.14

And I am using Ubuntu

Description:	Ubuntu 18.04.6 LTS
Release:	18.04
Codename:	bionic 

I even tried to run the command mrsm stack up -d db with sudo permissions suspecting file permission issue. Even this didn't resolve the issue.

Can someone please help me out in resolving the issue or point out what I am doing wrong?

Thanks in advance :")

[bmeares]

Hi @lrangar, thanks for reporting this bug! I spun up an Ubuntu 18.04 VM to investigate and was able to reproduce the issue. I believe this edge case was brought up by differences in the Python 3.8 standard library between Ubuntu 18.04 and 20.04+.

I threw together a quick patch and published v1.3.2 which should fix things for you:

pip install --upgrade meerschaum

Hopefully this should fix the issue! If you run into more problems, I recommend upgrading to Ubuntu 20.04 if possible.

Lastly, don't forget to add your user to the docker group for the stack command to work:

sudo usermod -aG docker $USER

[lrangar]

Hello @bmeares ,

The quick patch which you released did solve my above mentioned error. However, at some later steps I faced few errors. So in order to save time I installed Ubuntu-20.04 version as you suggested and it solved all the issues. Thanks a lot for your time in looking into my issue. :")