Error Installing OpenWISP2 on Raspbian Jessie

M Ricky Anggoro P

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Jul 12, 2019, 1:56:27 PM7/12/19

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Hello, I'm still newbie on OpenWISP2 and Ansible. I had some trouble on installing OpenWISP2 on Raspbian Jessie with ansbile playbook. This is my error line:

------------------------------

TASK [openwisp.openwisp2 : Update pip & related tools] ***********************************************

ok: [10.33.109.247]

TASK [openwisp.openwisp2 : Install cryptography from pip] ********************************************

fatal: [10.33.109.247]: FAILED! => {"changed": false, "cmd": ["/opt/openwisp2/env/bin/pip", "install", "-U", "cryptography"], "msg": "stdout: Collecting cryptography\n Using cached https://files.pythonhosted.org/packages/c2/95/f43d02315f4ec074219c6e3124a87eba1d2d12196c2767fadfdc07a83884/cryptography-2.7.tar.gz\n Installing build dependencies: started\n Installing build dependencies: finished with status 'done'\n Getting requirements to build wheel: started\n Getting requirements to build wheel: finished with status 'done'\n\n:stderr: DEPRECATION: Python 3.4 support has been deprecated. pip 19.1 will be the last one supporting it. Please upgrade your Python as Python 3.4 won't be maintained after March 2019 (cf PEP 429).\nERROR: Exception:\nTraceback (most recent call last):\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/cli/base_command.py\", line 178, in main\n status = self.run(options, args)\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/commands/install.py\", line 352, in run\n resolver.resolve(requirement_set)\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/resolve.py\", line 131, in resolve\n self._resolve_one(requirement_set, req)\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/resolve.py\", line 294, in _resolve_one\n abstract_dist = self._get_abstract_dist_for(req_to_install)\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/resolve.py\", line 242, in _get_abstract_dist_for\n self.require_hashes\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/operations/prepare.py\", line 362, in prepare_linked_requirement\n abstract_dist.prep_for_dist(finder, self.build_isolation)\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/operations/prepare.py\", line 169, in prep_for_dist\n self.install_backend_dependencies(finder=finder)\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/operations/prepare.py\", line 123, in install_backend_dependencies\n reqs = req.pep517_backend.get_requires_for_build_wheel()\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_vendor/pep517/wrappers.py\", line 71, in get_requires_for_build_wheel\n 'config_settings': config_settings\n File \"/opt/openwisp2/env/lib/python3.4/site-packages/pip/_vendor/pep517/wrappers.py\", line 162, in _call_hook\n raise BackendUnavailable\npip._vendor.pep517.wrappers.BackendUnavailable\n"}

PLAY RECAP *******************************************************************************************

10.33.109.247 : ok=24 changed=0 unreachable=0 failed=1 skipped=40 rescued=0 ignored=1

----------------------------------

I Suggest that my Python version is deprecated, but I already upgrade Python version to 3.6.3,

I also tried to install cryptography manually, like this:

pi@ricky:~/Python-3.6.3 $ sudo pip install cryptography

Collecting cryptography

Using cached https://files.pythonhosted.org/packages/c2/95/f43d02315f4ec074219c6e3124a87eba1d2d12196c2767fadfdc07a83884/cryptography-2.7.tar.gz

Installing build dependencies ... done

Getting requirements to build wheel ... done

Preparing wheel metadata ... done

Collecting six>=1.4.1 (from cryptography)

Downloading https://files.pythonhosted.org/packages/73/fb/00a976f728d0d1fecfe898238ce23f502a721c0ac0ecfedb80e0d88c64e9/six-1.12.0-py2.py3-none-any.whl

Collecting cffi!=1.11.3,>=1.8 (from cryptography)

Using cached https://files.pythonhosted.org/packages/93/1a/ab8c62b5838722f29f3daffcc8d4bd61844aa9b5f437341cc890ceee483b/cffi-1.12.3.tar.gz

Collecting asn1crypto>=0.21.0 (from cryptography)

Downloading https://files.pythonhosted.org/packages/ea/cd/35485615f45f30a510576f1a56d1e0a7ad7bd8ab5ed7cdc600ef7cd06222/asn1crypto-0.24.0-py2.py3-none-any.whl (101kB)

|████████████████████████████████| 102kB 1.8MB/s

Collecting pycparser (from cffi!=1.11.3,>=1.8->cryptography)

Building wheels for collected packages: cryptography

Building wheel for cryptography (PEP 517) ... done

Stored in directory: /root/.cache/pip/wheels/d0/02/96/64b1439e5409591b6b0294d1da2f66a4ae4f0548d1bdb225b7

Successfully built cryptography

Installing collected packages: six, pycparser, cffi, asn1crypto, cryptography

Running setup.py install for cffi ... done

Successfully installed asn1crypto-0.24.0 cffi-1.12.3 cryptography-2.7 pycparser-2.19 six-1.12.0

I got no idea what I should do to fix the error, thanks before.

M Ricky Anggoro P

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Jul 12, 2019, 1:58:18 PM7/12/19

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This is my hosts file:

[pi]

10.33.109.247

And this is my playbook.yml:

- hosts : pi

become: true

become_user: root

roles :

- openwisp.openwisp2

vars:

openwisp2_shared_secret: 12345678

postfix_myhostname: localhost

Federico Capoano

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Jul 12, 2019, 2:03:04 PM7/12/19

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To install cryptography manually you should do it in the python virtual environment used by openwisp:

cd /opt/openwisp2

source env/bin/activate

pip install cryptography

Try this and let me know if it solves it.

Best regards

Fed

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M Ricky Anggoro P

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Jul 12, 2019, 2:10:58 PM7/12/19

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Thanks for your very fast response :)

After I followed your suggest, i'm still got my error:

pi@ricky:~ $ cd /opt/openwisp2/

pi@ricky:/opt/openwisp2 $ ls

env

pi@ricky:/opt/openwisp2 $ source env/bin/activate

(env)pi@ricky:/opt/openwisp2 $ pip install cryptography

DEPRECATION: Python 3.4 support has been deprecated. pip 19.1 will be the last one supporting it. Please upgrade your Python as Python 3.4 won't be maintained after March 2019 (cf PEP 429).

Collecting cryptography

Using cached https://files.pythonhosted.org/packages/c2/95/f43d02315f4ec074219c6e3124a87eba1d2d12196c2767fadfdc07a83884/cryptography-2.7.tar.gz

Installing build dependencies ... done

Getting requirements to build wheel ... done

ERROR: Exception:

Traceback (most recent call last):

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/cli/base_command.py", line 178, in main

status = self.run(options, args)

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/commands/install.py", line 352, in run

resolver.resolve(requirement_set)

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/resolve.py", line 131, in resolve

self._resolve_one(requirement_set, req)

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/resolve.py", line 294, in _resolve_one

abstract_dist = self._get_abstract_dist_for(req_to_install)

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/resolve.py", line 242, in _get_abstract_dist_for

self.require_hashes

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/operations/prepare.py", line 362, in prepare_linked_requirement

abstract_dist.prep_for_dist(finder, self.build_isolation)

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/operations/prepare.py", line 169, in prep_for_dist

self.install_backend_dependencies(finder=finder)

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_internal/operations/prepare.py", line 123, in install_backend_dependencies

reqs = req.pep517_backend.get_requires_for_build_wheel()

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_vendor/pep517/wrappers.py", line 71, in get_requires_for_build_wheel

'config_settings': config_settings

File "/opt/openwisp2/env/lib/python3.4/site-packages/pip/_vendor/pep517/wrappers.py", line 162, in _call_hook

raise BackendUnavailable

pip._vendor.pep517.wrappers.BackendUnavailable

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Federico Capoano

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Jul 12, 2019, 6:08:41 PM7/12/19

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I'm not sure why it's happening, even after looking on Google it's not clear to me what that error means exactly.

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M Ricky Anggoro P

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Jul 14, 2019, 10:21:16 AM7/14/19

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Thanks for your response. After all, I gave up on Jessie, so I update my raspi to Buster, and run this command:

ansible-playbook -i hosts playbook.yml -b -k -K -u pi

It solved my problem. I think because the Python that installed in Jessie is 3.4, when Buster's default Python version is 3.7.3.

Thank you Federico, for your quick response.

Federico Capoano

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Jul 15, 2019, 1:54:04 PM7/15/19

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Welcome, I'm glad you solved it on your own.

It's quite hard to support many platforms out of the box.

Federico

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