chore: pip performance is improved by ipv4 over ipv6 precedence

[nstng]

Signed-off-by: Nils Semmelrock nils.semmelrock@tngtech.com

Summary

There is no ipv6 interface defined on the vms that is able to do external communication. Various tools (also pip) use getaddrinfo for communication with a service. This has per default an ipv6 preference. If ipv6 endpoints are not reachable then this can take much longer than needed.
Here: change to an ipv4 over ipv6 preference.

To reproduce:

• run time pip3 install pip-install-test with and without this change (can be done without sourcing or restarting)
• without ipv4 preference:

vagrant@magma-deb:~$ time pip3 install pip-install-test
Collecting pip-install-test
  Using cached pip_install_test-0.5-py3-none-any.whl (1.7 kB)
Installing collected packages: pip-install-test
Successfully installed pip-install-test-0.5

real	0m13.822s
user	0m1.329s
sys	0m0.132s

• with ipv4 preference:

vagrant@magma-deb:~$ time pip3 install pip-install-test
Collecting pip-install-test
  Using cached pip_install_test-0.5-py3-none-any.whl (1.7 kB)
Installing collected packages: pip-install-test
Successfully installed pip-install-test-0.5

real	0m1.707s
user	0m1.360s
sys	0m0.163s

• -> real 0m13.822s vs real 0m1.707s

Note: there might be a better way to configure the network interfaces of the VMs - until now I did not find a more clean way.

Test Plan

Make sure no integration test depends on an ipv6 preference:

• lte integ tests: https://github.com/nstng/magma/actions/runs/3159729632
  • test_3485_timer_for_default_bearer_with_mme_restart failed -> should not be related to change
• lte integ tests bazel: https://github.com/nstng/magma/actions/runs/3159735914
  • test_attach_detach_with_mobilityd_restart failed -> should not be related to change
• lte integ tests debian: https://github.com/nstng/magma/actions/runs/3159740729
  • currently bug for run on forks
• ✔️ cwf integ tests: https://github.com/nstng/magma/actions/runs/3159744715
• ✔️ feg integ tests: https://github.com/nstng/magma/actions/runs/3159749260
• ✔️ sudo tests: https://github.com/nstng/magma/actions/runs/3159753275

Additional Information

• This change is backwards-breaking

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[github-actions]

feg-workflow

    2 files  203 suites   40s ⏱️
374 tests 374 ✔️ 0 💤 0 ❌
388 runs  388 ✔️ 0 💤 0 ❌

Results for commit cad0478.

[github-actions]

dp-workflow

14 tests   14 ✔️  2m 26s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit cad0478.

[github-actions]

agw-workflow

615 tests   611 ✔️  4m 45s ⏱️
    2 suites      4 💤
    2 files        0 ❌

Results for commit cad0478.