Error while Installing Zope Server in Schedulix

[saloni mittal]

Hi Team,

Trouble creating virtual environment for Zope server installation in linux environment

1) We are facing trouble installing zope with virtual environment when executed we are facing the below error
when executing the shown command

 virtualenv --no-site-packages Zope
Traceback (most recent call last):
  File "/bin/virtualenv", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3084, in <module>
    @_call_aside
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3070, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3097, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 651, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 952, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 839, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'virtualenv==20.0.21' distribution was not found and is required by the application


2) We were unable to install virtualenv first with easy_install so we did the following

3) Installed pip package with yum instal python-pip

4) Downaload virtualenv using pip command. Output is shown below

 /bin/python -m pip install --user virtualenv
Collecting virtualenv
  Downloading https://files.pythonhosted.org/packages/57/6e/a13442adf18bada682f88f55638cd43cc7a39c3e00fdcf898ca4ceaeb682/virtualenv-20.0.21-py2.py3-none-any.whl (4.7MB)
    100% |████████████████████████████████| 4.7MB 174kB/s
Requirement already satisfied (use --upgrade to upgrade): six<2,>=1.9.0 in /usr/lib/python2.7/site-packages (from virtualenv)
Collecting distlib<1,>=0.3.0 (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/7d/29/694a3a4d7c0e1aef76092e9167fbe372e0f7da055f5dcf4e1313ec21d96a/distlib-0.3.0.zip (571kB)
    100% |████████████████████████████████| 573kB 1.7MB/s
Collecting importlib-metadata<2,>=0.12; python_version < "3.8" (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/ad/e4/891bfcaf868ccabc619942f27940c77a8a4b45fd8367098955bb7e152fb1/importlib_metadata-1.6.0-py2.py3-none-any.whl
Collecting appdirs<2,>=1.4.3 (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/3b/00/2344469e2084fb287c2e0b57b72910309874c3245463acd6cf5e3db69324/appdirs-1.4.4-py2.py3-none-any.whl
Collecting importlib-resources<2,>=1.0; python_version < "3.7" (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/7f/2d/88f166bcaadc09d9fdbf1c336ad118e01b7fe1155e15675e125be2ff1899/importlib_resources-1.5.0-py2.py3-none-any.whl
Collecting filelock<4,>=3.0.0 (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/14/ec/6ee2168387ce0154632f856d5cc5592328e9cf93127c5c9aeca92c8c16cb/filelock-3.0.12.tar.gz
Collecting contextlib2<1,>=0.6.0; python_version < "3.3" (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/85/60/370352f7ef6aa96c52fb001831622f50f923c1d575427d021b8ab3311236/contextlib2-0.6.0.post1-py2.py3-none-any.whl
Collecting pathlib2<3,>=2.3.3; python_version < "3.4" and sys_platform != "win32" (from virtualenv)
  Downloading https://files.pythonhosted.org/packages/e9/45/9c82d3666af4ef9f221cbb954e1d77ddbb513faf552aea6df5f37f1a4859/pathlib2-2.3.5-py2.py3-none-any.whl
Collecting zipp>=0.5 (from importlib-metadata<2,>=0.12; python_version < "3.8"->virtualenv)
  Downloading https://files.pythonhosted.org/packages/ce/8c/2c5f7dc1b418f659d36c04dec9446612fc7b45c8095cc7369dd772513055/zipp-3.1.0.tar.gz
  Running setup.py (path:/tmp/pip-build-nR0Qs9/zipp/setup.py) egg_info for package zipp produced metadata for project name unknown. Fix your #egg=zipp fragments.
Collecting configparser>=3.5; python_version < "3" (from importlib-metadata<2,>=0.12; python_version < "3.8"->virtualenv)
  Downloading https://files.pythonhosted.org/packages/e5/7c/d4ccbcde76b4eea8cbd73b67b88c72578e8b4944d1270021596e80b13deb/configparser-5.0.0.tar.gz (75kB)
    100% |████████████████████████████████| 81kB 7.8MB/s
  Running setup.py (path:/tmp/pip-build-nR0Qs9/configparser/setup.py) egg_info for package configparser produced metadata for project name unknown. Fix your #egg=configparser fragments.
Collecting singledispatch; python_version < "3.4" (from importlib-resources<2,>=1.0; python_version < "3.7"->virtualenv)
  Downloading https://files.pythonhosted.org/packages/c5/10/369f50bcd4621b263927b0a1519987a04383d4a98fb10438042ad410cf88/singledispatch-3.4.0.3-py2.py3-none-any.whl
Collecting typing; python_version < "3.5" (from importlib-resources<2,>=1.0; python_version < "3.7"->virtualenv)
  Downloading https://files.pythonhosted.org/packages/22/30/64ca29543375759dc589ade14a6cd36382abf2bec17d67de8481bc9814d7/typing-3.7.4.1-py2-none-any.whl
Collecting scandir; python_version < "3.5" (from pathlib2<3,>=2.3.3; python_version < "3.4" and sys_platform != "win32"->virtualenv)
  Downloading https://files.pythonhosted.org/packages/df/f5/9c052db7bd54d0cbf1bc0bb6554362bba1012d03e5888950a4f5c5dadc4e/scandir-1.10.0.tar.gz
Installing collected packages: distlib, contextlib2, unknown, scandir, pathlib2, unknown, importlib-metadata, appdirs, singledispatch, typing, importlib-resources, filelock, virtualenv
  Running setup.py install for distlib ... done
  Running setup.py install for unknown ... done
  Running setup.py install for scandir ... done
  Running setup.py install for unknown ... done
  Running setup.py install for filelock ... done
Successfully installed appdirs contextlib2 distlib filelock importlib-metadata importlib-resources pathlib2 scandir singledispatch typing unknown unknown virtualenv
You are using pip version 8.1.2, however version 20.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.

5) Then we installed virtualenv using easy_install and it did not work and gave below error

sudo /usr/bin/easy_install virtualenv
Searching for virtualenv
Best match: virtualenv 20.0.21
Adding virtualenv 20.0.21 to easy-install.pth file
Installing virtualenv script to /usr/bin

Using /root/.local/lib/python2.7/site-packages
Processing dependencies for virtualenv
Searching for zipp>=0.4
Reading https://pypi.python.org/simple/zipp/
Best match: zipp 3.1.0
Downloading https://files.pythonhosted.org/packages/ce/8c/2c5f7dc1b418f659d36c04dec9446612fc7b45c8095cc7369dd772513055/zipp-3.1.0.tar.gz#sha256=c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96
Processing zipp-3.1.0.tar.gz
Writing /tmp/easy_install-9dI7F0/zipp-3.1.0/setup.cfg
Running zipp-3.1.0/setup.py -q bdist_egg --dist-dir /tmp/easy_install-9dI7F0/zipp-3.1.0/egg-dist-tmp-8LBG0c
warning: install_lib: 'build/lib' does not exist -- no Python modules to install

zip_safe flag not set; analyzing archive contents...
Moving UNKNOWN-0.0.0-py2.7.egg to /usr/lib/python2.7/site-packages
Adding UNKNOWN 0.0.0 to easy-install.pth file

Installed /usr/lib/python2.7/site-packages/UNKNOWN-0.0.0-py2.7.egg
error: The 'zipp>=0.4' distribution was not found and is required by importlib-resources

6) So we upgraded pip package and installed virtual env again

/bin/python -m pip install --upgrade pip
Collecting pip
  Downloading https://files.pythonhosted.org/packages/43/84/23ed6a1796480a6f1a2d38f2802901d078266bda38388954d01d3f2e821d/pip-20.1.1-py2.py3-none-any.whl (1.5MB)
    100% |████████████████████████████████| 1.5MB 600kB/s
Installing collected packages: pip
  Found existing installation: pip 8.1.2
    Uninstalling pip-8.1.2:
      Successfully uninstalled pip-8.1.2
Successfully installed pip-20.1.1

/bin/python -m pip install --user virtualenv
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Requirement already satisfied: virtualenv in ./.local/lib/python2.7/site-packages (20.0.21)
Requirement already satisfied: distlib<1,>=0.3.0 in ./.local/lib/python2.7/site-packages (from virtualenv) (0.3.0)
Requirement already satisfied: filelock<4,>=3.0.0 in ./.local/lib/python2.7/site-packages (from virtualenv) (3.0.12)
Requirement already satisfied: importlib-resources<2,>=1.0; python_version < "3.7" in ./.local/lib/python2.7/site-packages (from virtualenv) (1.5.0)
Requirement already satisfied: six<2,>=1.9.0 in /usr/lib/python2.7/site-packages (from virtualenv) (1.9.0)
Requirement already satisfied: pathlib2<3,>=2.3.3; python_version < "3.4" and sys_platform != "win32" in ./.local/lib/python2.7/site-packages (from virtualenv) (2.3.5)
Requirement already satisfied: contextlib2<1,>=0.6.0; python_version < "3.3" in ./.local/lib/python2.7/site-packages (from virtualenv) (0.6.0.post1)
Requirement already satisfied: appdirs<2,>=1.4.3 in ./.local/lib/python2.7/site-packages (from virtualenv) (1.4.4)
Requirement already satisfied: importlib-metadata<2,>=0.12; python_version < "3.8" in ./.local/lib/python2.7/site-packages (from virtualenv) (1.6.0)
Collecting zipp>=0.4; python_version < "3.8"
  Downloading zipp-1.2.0-py2.py3-none-any.whl (4.8 kB)
Requirement already satisfied: singledispatch; python_version < "3.4" in ./.local/lib/python2.7/site-packages (from importlib-resources<2,>=1.0; python_version < "3.7"->virtualenv) (3.4.0.3)
Requirement already satisfied: typing; python_version < "3.5" in ./.local/lib/python2.7/site-packages (from importlib-resources<2,>=1.0; python_version < "3.7"->virtualenv) (3.7.4.1)
Requirement already satisfied: scandir; python_version < "3.5" in ./.local/lib/python2.7/site-packages (from pathlib2<3,>=2.3.3; python_version < "3.4" and sys_platform != "win32"->virtualenv) (1.10.0)
Collecting configparser>=3.5; python_version < "3"
  Downloading configparser-4.0.2-py2.py3-none-any.whl (22 kB)
Installing collected packages: zipp, configparser
Successfully installed configparser-4.0.2 zipp-1.2.0

7) We then executed virtualenv with easy_install it don't thow error

sudo /usr/bin/easy_install virtualenv
Searching for virtualenv
Best match: virtualenv 20.0.21
Adding virtualenv 20.0.21 to easy-install.pth file
Installing virtualenv script to /usr/bin

Using /root/.local/lib/python2.7/site-packages
Processing dependencies for virtualenv
Finished processing dependencies for virtualenv


8) Even after this we are not able to proceed further


virtualenv --no-site-packages Zope
Traceback (most recent call last):
  File "/bin/virtualenv", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3084, in <module>
    @_call_aside
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3070, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3097, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 651, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 952, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 839, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'virtualenv==20.0.21' distribution was not found and is required by the application

Thank you,

Saloni

[Ronald Jeninga]

Hi Saloni,

it's probably something "stupid". I'll have to read everything very closely.

But before I do so, what platform are you using?

I assume it's not a RHEL7 or 8 (or compatible like CentOS)?

And please have a look at $BICSUITEHOME/lib/zope-pre.script

It is the pre-install script that is used by my rpms and it works pretty well on bothe RHEL7 and 8.

Note that in case of RHEL8 not virtualenv but virtualenv-2 is used (Zope still runs with python2; people are working on a port to python3 but that's not as stable as we would like to).

Best regards,

Ronald

[Ronald Jeninga]

... not as stable *yet* as we would like to...

I'm not blaming any of the people doing this magnificent and difficult work!

On the contrary, I really appreciate their huge efforts!

Ronald

[saloni mittal]

Hi Ronald,

The issue has been resolved.

We have faced a major issue while creating the python virtual environment for a Zope Server , we followed couple of links which helped us installed Virtual env “virtualenv 20.0.21” .Still no luck. After checking  we have observed there it was “virtualenv 16.0.0” was present.

Then we installed it and the issue is resolved now.

Thank you,

Saloni

[Ronald Jeninga]

Hi Saloni,

I'm glad you've found the culprit. I would have had a hard time finding that remotely.

Thank you for the feedback!

Best regards,

Ronald