"Links are not allowed as constraints" with current pip versions

[Kevin Zhao]

Setup devstack master on ubuntu 21.04 Hirsute.

Python 3.9

2021-08-08 09:27:49.395 | WARNING: You are using pip version 20.2.4; however, version 21.2.3 is available.
2021-08-08 09:27:49.395 | You should consider upgrading via the '/usr/bin/python3.9 -m pip install --upgrade pip' command.
2021-08-08 09:27:49.591 | +^[[3242minc/python:pip_install:200 ^[[m^O result=0
2021-08-08 09:27:49.606 | +^[[3242minc/python:pip_install:202 ^[[m^O time_stop pip_install
2021-08-08 09:27:49.620 | +^[[3242mfunctions-common:time_stop:2309 ^[[m^O local name
2021-08-08 09:27:49.635 | +^[[3242mfunctions-common:time_stop:2310 ^[[m^O local end_time
2021-08-08 09:27:49.648 | +^[[3242mfunctions-common:time_stop:2311 ^[[m^O local elapsed_time
2021-08-08 09:27:49.661 | +^[[3242mfunctions-common:time_stop:2312 ^[[m^O local total
2021-08-08 09:27:49.674 | +^[[3242mfunctions-common:time_stop:2313 ^[[m^O local start_time
2021-08-08 09:27:49.689 | +^[[3242mfunctions-common:time_stop:2315 ^[[m^O name=pip_install
2021-08-08 09:27:49.703 | +^[[3242mfunctions-common:time_stop:2316 ^[[m^O start_time=1628414865235
2021-08-08 09:27:49.716 | +^[[3242mfunctions-common:time_stop:2318 ^[[m^O [[ -z 1628414865235 ]]
2021-08-08 09:27:49.729 | ++^[[3242mfunctions-common:time_stop:2321 ^[[m^O date +%s%3N
2021-08-08 09:27:49.747 | +^[[3242mfunctions-common:time_stop:2321 ^[[m^O end_time=1628414869732
2021-08-08 09:27:49.760 | +^[[3242mfunctions-common:time_stop:2322 ^[[m^O elapsed_time=4497
2021-08-08 09:27:49.774 | +^[[3242mfunctions-common:time_stop:2323 ^[[m^O total=0
2021-08-08 09:27:49.787 | +^[[3242mfunctions-common:time_stop:2325 ^[[m^O _TIME_START[$name]=
2021-08-08 09:27:49.801 | +^[[3242mfunctions-common:time_stop:2326 ^[[m^O _TIME_TOTAL[$name]=4497
2021-08-08 09:27:49.815 | +^[[3242minc/python:pip_install:203 ^[[m^O return 0
2021-08-08 09:27:49.830 | +^[[3242m./stack.sh:main:773 ^[[m^O iniset -sudo /etc/systemd/journald.conf Journal RateLimitBurst 0
2021-08-08 09:27:49.968 | +^[[3242m./stack.sh:main:774 ^[[m^O sudo systemctl restart systemd-journald
2021-08-08 09:27:50.269 | +^[[3242m./stack.sh:main:780 ^[[m^O install_infra
2021-08-08 09:27:50.283 | +^[[3242mlib/infra:install_infra:31 ^[[m^O local PIP_VIRTUAL_ENV=/opt/stack/requirements/.venv
2021-08-08 09:27:50.298 | +^[[3242mlib/infra:install_infra:32 ^[[m^O '[' '!' -d /opt/stack/requirements/.venv ']'
2021-08-08 09:27:50.312 | +^[[3242mlib/infra:install_infra:32 ^[[m^O python3 -m venv /opt/stack/requirements/.venv
2021-08-08 09:27:55.492 | +^[[3242mlib/infra:install_infra:34 ^[[m^O PIP_VIRTUAL_ENV=/opt/stack/requirements/.venv
2021-08-08 09:27:55.507 | +^[[3242mlib/infra:install_infra:34 ^[[m^O pip_install -U pbr
2021-08-08 09:27:55.605 | +^[[3242minc/python:pip_install:193 ^[[m^O env http_proxy= https_proxy= no_proxy= PIP_FIND_LINKS= SETUPTOOLS_SYS_PATH_TECHNIQUE=rewrite /opt/stack/requirements/.venv/bin/pip install -c /opt/stack/requirements/upper-constraints.txt -U pbr
2021-08-08 09:27:59.093 | DEPRECATION: Constraints are only allowed to take the form of a package name and a version specifier. Other forms were originally permitted as an accident of the implementation, but were undocumented. The new implementation of the resolver no longer supports these forms. A possible replacement is replacing the constraint with a requirement.. You can find discussion regarding this at https://github.com/pypa/pip/issues/8210.
2021-08-08 09:27:59.093 | ERROR: Links are not allowed as constraints
2021-08-08 09:27:59.300 | +^[[3242minc/python:pip_install:1 ^[[m^O exit_trap
2021-08-08 09:27:59.317 | +^[[3242m./stack.sh:exit_trap:507 ^[[m^O local r=1
2021-08-08 09:27:59.335 | ++^[[3242m./stack.sh:exit_trap:508 ^[[m^O jobs -p
2021-08-08 09:27:59.352 | +^[[3242m./stack.sh:exit_trap:508 ^[[m^O jobs=
2021-08-08 09:27:59.366 | +^[[3242m./stack.sh:exit_trap:511 ^[[m^O [[ -n '' ]]
2021-08-08 09:27:59.382 | +^[[3242m./stack.sh:exit_trap:517 ^[[m^O '[' -f '' ']'
2021-08-08 09:27:59.398 | +^[[3242m./stack.sh:exit_trap:522 ^[[m^O kill_spinner
2021-08-08 09:27:59.413 | +^[[3242m./stack.sh:kill_spinner:417 ^[[m^O '[' '!' -z '' ']'
2021-08-08 09:27:59.429 | +^[[3242m./stack.sh:exit_trap:524 ^[[m^O [[ 1 -ne 0 ]]
2021-08-08 09:27:59.444 | +^[[3242m./stack.sh:exit_trap:525 ^[[m^O echo 'Error on exit'
2021-08-08 09:27:59.444 | Error on exit
2021-08-08 09:27:59.460 | +^[[3242m./stack.sh:exit_trap:527 ^[[m^O type -p generate-subunit
2021-08-08 09:27:59.476 | +^[[3242m./stack.sh:exit_trap:528 ^[[m^O generate-subunit 1628414803 76 fail
2021-08-08 09:28:00.095 | +^[[3242m./stack.sh:exit_trap:530 ^[[m^O [[ -z /opt/stack/logs ]]
2021-08-08 09:28:00.111 | +^[[3242m./stack.sh:exit_trap:533 ^[[m^O /usr/bin/python3.9 /opt/stack/devstack/tools/worlddump.py -d /opt/stack/logs
2021-08-08 09:28:00.739 | +^[[3242m./stack.sh:exit_trap:542 ^[[m^O exit 1

Follow the guide from: https://github.com/pypa/pip/issues/8253

Limit the pip to 20.2.3 can workaround this issue.

[Radosław Piliszek (yoctozepto)]

We don't support Ubuntu 21.04 nor are we going to constrain pip *again*. We are actively working on fixing the real issue here "ERROR: Links are not allowed as constraints" getting Fedora to work. Please see: https://review.opendev.org/c/openstack/devstack/+/802642

[Justas P (jpou123)]

I'm having same issue on Ubuntu 20.04.03. Running DevStack from stable/victoria branch.

jpo@jpo-test:~/devstack$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal

Using python 3.8 to install os-testr
+inc/python:pip_install:193 sudo -H LC_ALL=en_US.UTF-8 SETUPTOOLS_USE_DISTUTILS=stdlib http_proxy= https_proxy= no_proxy= PIP_FIND_LINKS= SETUPTOOLS_SYS_PATH_TECHNIQUE=rewrite python3.8 -m pip install -c /opt/stack/requirements/upper-constraints.txt -U os-testr
DEPRECATION: Constraints are only allowed to take the form of a package name and a version specifier. Other forms were originally permitted as an accident of the implementation, but were undocumented. The new implementation of the resolver no longer supports these forms. A possible replacement is replacing the constraint with a requirement. You can find discussion regarding this at https://github.com/pypa/pip/issues/8210.
ERROR: Editable requirements are not allowed as constraints
+inc/python:pip_install:1 exit_trap
+./stack.sh:exit_trap:496 local r=1
++./stack.sh:exit_trap:497 jobs -p
+./stack.sh:exit_trap:497 jobs=
+./stack.sh:exit_trap:500 [[ -n '' ]]
+./stack.sh:exit_trap:506 '[' -f '' ']'
+./stack.sh:exit_trap:511 kill_spinner
+./stack.sh:kill_spinner:406 '[' '!' -z '' ']'
+./stack.sh:exit_trap:513 [[ 1 -ne 0 ]]
+./stack.sh:exit_trap:514 echo 'Error on exit'
Error on exit
+./stack.sh:exit_trap:516 type -p generate-subunit
+./stack.sh:exit_trap:517 generate-subunit 1631878217 42 fail
./stack.sh: line 517: /opt/stack/devstack.subunit: Permission denied
jpo@jpo-test:~/devstack$

[Dr. Jens Harbott (j-harbott)]

I think that this issue has been fixed by now. If you still have problems, please attach the full output of your stack.sh run on a fresh installation.

[Jason Paroly (jparoly)]

I can confirm that I did not hit this issue. I installed devstack from the master branch on ubuntu 20.04.03.

my local.conf:

[[local|localrc]]
ADMIN_PASSWORD=<psswd>
DATABASE_PASSWORD=<psswd>
RABBIT_PASSWORD=<psswd>
SERVICE_PASSWORD=<psswd>