Apt dependency libnuma1 missing for Ubuntu 22.04 + amd64

[externl]

Description

Hi, sorry if this is the wrong repository to report this issue.

We recently encountered this issue when we upgraded our CI Docker container to use Ubuntu 22.04. We noticed that QuicConnection.IsSupported was suddenly returning false when it was previously working on Ubuntu 20.04.

After some digging it was narrowed down to a missing dependency liblttng-ust1. It is listed on the Install the .NET SDK or the .NET Runtime on Ubuntu page as required and that "When you install with a package manager, these libraries are installed for you."

It appears that it is not he case for this particular dependency. Minimal Ubuntu installs (like from Docker) do not include this out of the box, but regular sever installs do (e.g. installing from the ISO).

Adding the MS apt repository and installing dotnet does not bring in this dependency.

This also affects the official MS container mcr.microsoft.com/dotnet/sdk:7.0

As far as I can tell this affects amd64, but not arm64. Uninstalling liblttng-ust1 in an arm64 container will also uninstall dotnet. This doesn't seem to be the case for amd64

Reproduction Steps

Clone https://github.com/externl/quic-test on an amd64 machine with Docker installed.

By default it only a few packages are installed. Just enough to enable the ms repo and install dotnet-sdk-7.0. It does not include liblttng-ust1.

docker build -t quic-test .
docker run --rm quic-test

You'll see QIC is not supported :(

Now update Dockerfile and uncomment the line that installs liblttng-ust1. The the above commands again and you'll see QIC is supported :)

You should also be able to reproduce this by uninstalling liblttng-ust1 and then installing dotnet-sdk-7.0 from the MS apt repostiroy.

Expected behavior

liblttng-ust1 should be a dependency when installing dotnet from the apt repo

Actual behavior

It does not get installed.

Regression?

No response

Known Workarounds

No response

Configuration

No response

Other information

No response

[jkoritzinsky]

Right now, the Microsoft build of .NET does not explicitly require libttng-ust packages to be installed. The support for LTTNG lights up when the packages are available.

When using the build of .NET that Ubuntu provides in the default repositories for Ubuntu, the dependency should be present on the package metadata (and cause it to auto-install).

@hoyosjs this is related to what we were discussing offline last week.

[externl]

The support for LTTNG lights up when the packages are available.

Unfortunately System.Net.Quic seems to rely on this being installed, and it's not so obvious why it doesn't work when it's not installed.

The MS documentation doesn't mention anywhere that this is an optional dependency. It actually states that libttng-ust will be installed for you.

[jkotas]

If msquic package depends on liblttng, it should declare it as a dependency. This should be transfered to https://github.com/microsoft/msquic

[ghost]

Tagging subscribers to this area: @dotnet/ncl
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Issue Details

---

Description

Hi, sorry if this is the wrong repository to report this issue.

We recently encountered this issue when we upgraded our CI Docker container to use Ubuntu 22.04. We noticed that QuicConnection.IsSupported was suddenly returning false when it was previously working on Ubuntu 20.04.

After some digging it was narrowed down to a missing dependency liblttng-ust1. It is listed on the Install the .NET SDK or the .NET Runtime on Ubuntu page as required and that "When you install with a package manager, these libraries are installed for you."

It appears that it is not he case for this particular dependency. Minimal Ubuntu installs (like from Docker) do not include this out of the box, but regular sever installs do (e.g. installing from the ISO).

Adding the MS apt repository and installing dotnet does not bring in this dependency.

This also affects the official MS container mcr.microsoft.com/dotnet/sdk:7.0

As far as I can tell this affects amd64, but not arm64. Uninstalling liblttng-ust1 in an arm64 container will also uninstall dotnet. This doesn't seem to be the case for amd64

Reproduction Steps

Clone https://github.com/externl/quic-test on an amd64 machine with Docker installed.

By default it only a few packages are installed. Just enough to enable the ms repo and install dotnet-sdk-7.0. It does not include liblttng-ust1.

docker build -t quic-test .
docker run --rm quic-test

You'll see QIC is not supported :(

Now update Dockerfile and uncomment the line that installs liblttng-ust1. The the above commands again and you'll see QIC is supported :)

You should also be able to reproduce this by uninstalling liblttng-ust1 and then installing dotnet-sdk-7.0 from the MS apt repostiroy.

Expected behavior

liblttng-ust1 should be a dependency when installing dotnet from the apt repo

Actual behavior

It does not get installed.

Regression?

No response

Known Workarounds

No response

Configuration

No response

Other information

No response

Author:	externl
Assignees:	-
Labels:	area-Setup, untriaged, area-System.Net.Quic
Milestone:	-

[jkotas]

cc @wfurt Is there a known issue with msquic dependency on lttng?

[externl]

If msquic package depends on liblttng, it should declare it as a dependency. This should be transfered to https://github.com/microsoft/msquic

The dotnet documentation should also be updated to indicate that libttng-ust is not a required dependency and it is not installed automatically.

See https://learn.microsoft.com/en-us/dotnet/core/install/linux-ubuntu#dependencies

[wfurt]

AFAIK lttng was soft dependency. We only encountered problem with libnuma and the fix was submitted to msquic but not related.
@nibanks would know.

cc: @CarnaViire @ManickaP

[ManickaP]

It's libnuma not lttng. It works with pulling lttng because that has dependency on libnuma: https://packages.ubuntu.com/jammy/libs/liblttng-ust1
If you change the Dockerfile to do apt install libnuma1, it will work.

My outputs:

# default
docker run -it cf927e8d2961
QIC is not supported :(

# running ldd on libmsquic
root@184675f140d7:/app# ldd /usr/lib/x86_64-linux-gnu/libmsquic.so.2.2.1
linux-vdso.so.1 (0x00007ffc3cdf3000)
libcrypto.so.3 => /lib/x86_64-linux-gnu/libcrypto.so.3 (0x00007f886ac00000)
libnuma.so.1 => not found
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f886a800000)
/lib64/ld-linux-x86-64.so.2 (0x00007f886b2cd000)

# installing libnuma
root@184675f140d7:/app# apt install libnuma1
...
root@184675f140d7:/app# dotnet run
QIC is supported :)

So this is just a rehash of microsoft/msquic#3421

[wfurt]

this should be fixed by new MsQuic 2.2.2 package.