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VPN does not work in VM if CGO_ENABLED = 0 but works with CGO_ENABLED = 1 #358

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1 of 3 tasks
tricktron opened this issue Jun 30, 2022 · 5 comments · Fixed by #359
Closed
1 of 3 tasks

VPN does not work in VM if CGO_ENABLED = 0 but works with CGO_ENABLED = 1 #358

tricktron opened this issue Jun 30, 2022 · 5 comments · Fixed by #359

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@tricktron
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Description

While testing the newest #357 qemu fix with nix for NixOS/nixpkgs#179522 I noticed the following:

If CGO_ENABLED=0 my vpn did not work. If CGO_ENABLED=1 my vpn inside the vm works.

Hypothesis: CGO_ENABLED=1 means that go uses native libraries, e.g. for dns resolution. As a result, that means that vpn passthrough to the VM to QEMU may need CGO_ENABLED=1.

Possibly relevant/related: Lima needs CGO_ENABLED=1 as well. https://github.com/lima-vm/lima/blob/master/docs/network.md#dns-19216853.

Unfortunately I cannot share my vpn configs, since it is a customer.

Version

Colima Version: 0.4.3 git commit: 84fae1c
Lima Version: 0.11.1
Qemu Version: 7.0

Operating System

  • macOS Intel
  • macOS M1
  • Linux

Reproduction Steps

  1. colima start
  2. colima ssh
  3. nslookup (internal domain only reachable by vpn)

Expected behaviour

Connection works.

Additional context

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@abiosoft
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abiosoft commented Jun 30, 2022 •
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Alright, then we can switch it back to using CGO_ENABLED=1.

As a side note, thanks @tricktron, you've been very helpful with your feedbacks.

tricktron added a commit to tricktron/nixpkgs that referenced this issue Jun 30, 2022
@tricktron
colima: set CGO_ENABLED = 1 to make VPN connections work
fe6fd9e 
See abiosoft/colima#358
@abiosoft abiosoft mentioned this issue Jun 30, 2022
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@abiosoft
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@tricktron do you mind helping to confirm if it works with the CGO_ENABLED variable missing? To confirm the default behaviour.

@tricktron
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@abiosoft sure, I can test it tomorrow.

@tricktron
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tricktron commented Jul 1, 2022 •
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@abiosoft

@tricktron do you mind helping to confirm if it works with the CGO_ENABLED variable missing? To confirm the default behaviour.

I can confirm, it works:+1:

I think you are ready for a new tag/release:smiley:.

@abiosoft
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abiosoft commented Jul 1, 2022 •
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@tricktron https://github.com/abiosoft/colima/releases/tag/v0.4.4.

Release and release notes will be generated after successful build but you can point the Nix package to v0.4.4 already.

Release is done.

Thanks.

SuperSandro2000 added a commit to NixOS/nixpkgs that referenced this issue Jul 4, 2022
@tricktron @06kellyjac
@Atemu @SuperSandro2000
colima: 0.4.2 -> 0.4.4 (#179522)
ac8fadc 
* colima: use updated Makefile in build and install phases

* colima: use lima-unwrapped

* colima: fix dynamic version

* colima: 0.4.2 -> 0.4.3

* colima: delete .git folder in postfetch when `leaveDotGit = true`

Otherwise it may lead to non-deterministic behaviour.

Co-authored-by: j-k <dev@j-k.io>

* colima: do not override default buildGoModule phases

The colima Makefile does more or less the same as the `buildGoModule`
implementation. Instead of overriding it and using the Makefile
directly, we reproduce the behaviour desired behaviour by customising
env variables, e.g. `ldflags` and `subPackages`.

Co-authored-by: j-k <dev@j-k.io>

* colima: use `buildGoModule = buildGo118Module;`

Co-authored-by: j-k <dev@j-k.io>

* colima: update meta.description

Co-authored-by: j-k <dev@j-k.io>

* colima: set `CGO_ENABLED = 1` to make VPN connections work

See abiosoft/colima#358

* colima: 0.4.3 -> 0.4.4

* colima: define all ldflags in preConfigure

Co-authored-by: Atemu <Atemu@users.noreply.github.com>

* colima: add version test

* colima: add meta.mainProgram and meta.platforms

* colima: remove unused runCommand input

Co-authored-by: j-k <dev@j-k.io>

* colima: cleanup meta

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

* colima: drop meta.platforms

because we use the default value of `platforms.darwin ++
platforms.linux`

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>
Co-authored-by: Atemu <Atemu@users.noreply.github.com>

* Update pkgs/applications/virtualization/colima/default.nix

Co-authored-by: j-k <dev@j-k.io>
Co-authored-by: Atemu <Atemu@users.noreply.github.com>
Co-authored-by: Sandro <sandro.jaeckel@gmail.com>
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net: remove CGO_ENABLED=0 to fix VPN connections abiosoft/colima
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@abiosoft @tricktron