installing dependency docker-compose with pip3 fails

[d10r]

I was setting up an AMB oracle following instructions in https://docs.tokenbridge.net/amb-bridge/arbitrary-message-bridge-deployment/2-tokenbridge-oracle-instance, using a virgin Ubuntu 18.04 target.

$ ansible-playbook -e 'ansible_python_interpreter=/usr/bin/python3' -i hosts.yml site.yml
...
TASK [common : Install python docker library] ***************************************************************************************************************************************************************
fatal: [95.216.217.155]: FAILED! => {"changed": true, "cmd": "pip3 install docker docker-compose setuptools", "delta": "0:00:01.980818", "end": "2020-11-13 14:12:02.450033", "msg": "non-zero return code", "rc": 1, "start": "2020-11-13 14:12:00.469215", "stderr": "    ERROR: Command errored out with exit status 1:\n     command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '\"'\"'/tmp/pip-install-1wef4f88/dockerpty/setup.py'\"'\"'; __file__='\"'\"'/tmp/pip-install-1wef4f88/dockerpty/setup.py'\"'\"';f=getattr(tokenize, '\"'\"'open'\"'\"', open)(__file__);code=f.read().replace('\"'\"'\\r\\n'\"'\"', '\"'\"'\\n'\"'\"');f.close();exec(compile(code, __file__, '\"'\"'exec'\"'\"'))' egg_info --egg-base /tmp/pip-pip-egg-info-kndur3cn\n         cwd: /tmp/pip-install-1wef4f88/dockerpty/\n    Complete output (3 lines):\n    Traceback (most recent call last):\n      File \"<string>\", line 1, in <module>\n    ModuleNotFoundError: No module named 'setuptools'\n    ----------------------------------------\nERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.", "stderr_lines": ["    ERROR: Command errored out with exit status 1:", "     command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '\"'\"'/tmp/pip-install-1wef4f88/dockerpty/setup.py'\"'\"'; __file__='\"'\"'/tmp/pip-install-1wef4f88/dockerpty/setup.py'\"'\"';f=getattr(tokenize, '\"'\"'open'\"'\"', open)(__file__);code=f.read().replace('\"'\"'\\r\\n'\"'\"', '\"'\"'\\n'\"'\"');f.close();exec(compile(code, __file__, '\"'\"'exec'\"'\"'))' egg_info --egg-base /tmp/pip-pip-egg-info-kndur3cn", "         cwd: /tmp/pip-install-1wef4f88/dockerpty/", "    Complete output (3 lines):", "    Traceback (most recent call last):", "      File \"<string>\", line 1, in <module>", "    ModuleNotFoundError: No module named 'setuptools'", "    ----------------------------------------", "ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output."], "stdout": "Collecting docker\n  Downloading docker-4.3.1-py2.py3-none-any.whl (145 kB)\nCollecting docker-compose\n  Downloading docker_compose-1.27.4-py2.py3-none-any.whl (110 kB)\nCollecting setuptools\n  Downloading setuptools-50.3.2-py3-none-any.whl (785 kB)\nRequirement already satisfied: requests!=2.18.0,>=2.14.2 in /usr/lib/python3/dist-packages (from docker) (2.18.4)\nCollecting websocket-client>=0.32.0\n  Downloading websocket_client-0.57.0-py2.py3-none-any.whl (200 kB)\nRequirement already satisfied: six>=1.4.0 in /usr/lib/python3/dist-packages (from docker) (1.11.0)\nCollecting python-dotenv<1,>=0.13.0\n  Downloading python_dotenv-0.15.0-py2.py3-none-any.whl (18 kB)\nRequirement already satisfied: PyYAML<6,>=3.10 in /usr/lib/python3/dist-packages (from docker-compose) (3.12)\nCollecting dockerpty<1,>=0.4.1\n  Downloading dockerpty-0.4.1.tar.gz (13 kB)", "stdout_lines": ["Collecting docker", "  Downloading docker-4.3.1-py2.py3-none-any.whl (145 kB)", "Collecting docker-compose", "  Downloading docker_compose-1.27.4-py2.py3-none-any.whl (110 kB)", "Collecting setuptools", "  Downloading setuptools-50.3.2-py3-none-any.whl (785 kB)", "Requirement already satisfied: requests!=2.18.0,>=2.14.2 in /usr/lib/python3/dist-packages (from docker) (2.18.4)", "Collecting websocket-client>=0.32.0", "  Downloading websocket_client-0.57.0-py2.py3-none-any.whl (200 kB)", "Requirement already satisfied: six>=1.4.0 in /usr/lib/python3/dist-packages (from docker) (1.11.0)", "Collecting python-dotenv<1,>=0.13.0", "  Downloading python_dotenv-0.15.0-py2.py3-none-any.whl (18 kB)", "Requirement already satisfied: PyYAML<6,>=3.10 in /usr/lib/python3/dist-packages (from docker-compose) (3.12)", "Collecting dockerpty<1,>=0.4.1", "  Downloading dockerpty-0.4.1.tar.gz (13 kB)"]}  

I then tried to do that manually on the target in an ssh session:

# pip3 install docker-compose
Collecting docker-compose
  Using cached docker_compose-1.27.4-py2.py3-none-any.whl (110 kB)
Collecting python-dotenv<1,>=0.13.0
  Using cached python_dotenv-0.15.0-py2.py3-none-any.whl (18 kB)
Collecting requests<3,>=2.20.0
  Downloading requests-2.25.0-py2.py3-none-any.whl (61 kB)
     |████████████████████████████████| 61 kB 2.8 MB/s 
Requirement already satisfied: PyYAML<6,>=3.10 in /usr/lib/python3/dist-packages (from docker-compose) (3.12)
Collecting texttable<2,>=0.9.0
  Downloading texttable-1.6.3-py2.py3-none-any.whl (10 kB)
Requirement already satisfied: websocket-client<1,>=0.32.0 in /usr/local/lib/python3.6/dist-packages (from docker-compose) (0.57.0)
Collecting cached-property<2,>=1.2.0
  Downloading cached_property-1.5.2-py2.py3-none-any.whl (7.6 kB)
Collecting distro<2,>=1.5.0
  Downloading distro-1.5.0-py2.py3-none-any.whl (18 kB)
Collecting docopt<1,>=0.6.1
  Downloading docopt-0.6.2.tar.gz (25 kB)
    ERROR: Command errored out with exit status 1:
     command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-7stclzk6/docopt/setup.py'"'"'; __file__='"'"'/tmp/pip-install-7stclzk6/docopt/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-quvjndi1
         cwd: /tmp/pip-install-7stclzk6/docopt/
    Complete output (3 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
    ModuleNotFoundError: No module named 'setuptools'
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

Could be solved with apt install python3-setuptools.
I propose to either mention that requirement in the docs or to add that dependency to the Ansible scripts.