GLIBC_2.28 not found

[rgreinho]

Since I upgraded to Rust 1.78, I am facing the following issue while deploying lambda functions:

/var/task/bootstrap: /lib64/libc.so.6: version `GLIBC_2.28' not found (required by /var/task/bootstrap) 

I checked older issues and found somehow similar ones, but it looks like I am building and deploying my functions correctly though:

My runtime is Amazon Linux 2:

The functions are built with cargo lambda build --release

My rust version is:

$ rustc --version
rustc 1.78.0 (9b00956e5 2024-04-29)

And I am using lambda_runtime = "0.11.1".

Could it be that Rust 1.78 cannot yet run on Amazon Linux 2 runtimes?

[RDarrylR]

I believe you will need to move to Amazon Linux 2023 as AL2 doesn’t support newer GLIBC versions. That was my experience when I was using AL2.

[calavera]

I believe you will need to move to Amazon Linux 2023 as AL2 doesn’t support newer GLIBC versions. That was my experience when I was using AL2.

That's correct. Deploy your function with the runtime provided.al2023.

[github-actions]

This issue is now closed. Comments on closed issues are hard for our team to see.
If you need more assistance, please either tag a team member or open a new issue that references this one.

[rgreinho]

Thanks y'all, it worked! 😃

[mbergkvist]

We are deploying to aws-cn so Amazon Linux 2023 is unfortunately not yet an option for us. Our solution is to add

{
    bundling: {
        cargoLambdaFlags: ['--target', 'aarch64-unknown-linux-gnu.2.26'],
    },
    runtime: 'provided.al2'
}

to the RustFunctionProps (cargo-lambda-cdk).

[tbar4]

We are deploying to aws-cn so Amazon Linux 2023 is unfortunately not yet an option for us. Our solution is to add

{
    bundling: {
        cargoLambdaFlags: ['--target', 'aarch64-unknown-linux-gnu.2.26'],
    },
    runtime: 'provided.al2'
}

to the RustFunctionProps (cargo-lambda-cdk).

Thanks for solving, AWS gov-cloud won't be getting AL2023 for lambda for the foreseeable future so this is a big help.

[jtuliani]

@tbar4 The Lambda AL2023 runtimes are now available in China regions: https://www.amazonaws.cn/en/new/2024/amazon-lambda-adds-support-for-amazon-linux-2023-runtimes-in-amazon-web-services-china-regions/

[hxk1633]

@calavera Using the provided.al2023 fixes this issue, but fails to build the docker image when I use sam local start-api. The image it tries to build is public.ecr.aws/sam/emulation-provided.al2023 according to my logs. I have more details about this in an issue I created: aws/aws-sam-cli#7825. Curious if this is is an issue with the provided.2023 docker image or a bug with the SAM CLI. Your thoughts?

[rimutaka]

The lambda binary can include the GLIBC if there is a mismatch with what is in the image/container:

RUSTFLAGS='-C target-feature=+crt-static' cargo build --release --target $target --package $crate

How it works: https://doc.rust-lang.org/rustc/codegen-options/index.html#target-feature

Current GLIBC versions

Check the links for the latest at the time of reading this.

• the latest: 2.40 (https://sourceware.org/glibc/)
• Ubuntu 24: 2.39 (https://discourse.ubuntu.com/t/ubuntu-24-04-lts-noble-numbat-release-notes/39890)
• provided.al2023: glibc 2.34 (https://docs.aws.amazon.com/linux/al2023/ug/core-glibc.html)