Document the required glibc version for wide compatibilty

[leogr]

What to document

Plugins authors must build their plugins using the same glibs version we use in Falco. We have to document that.

/cc @jasondellaluce

[alban]

Thanks! FYI, I use the following Dockerfile to ensure that I have the same glibc as the one in Falco:

# Use the same base image as falco to ensure compatibility with glibc version
FROM golang:buster as builder

# Cache go modules so they won't be downloaded at each build
COPY go.mod go.sum /src/
RUN cd /src && go mod download

COPY ./ /src
RUN cd /src && make -C falco-plugin

# Use the following command to get the built files:
# DOCKER_BUILDKIT=1 docker build -f falco-plugin/Dockerfile --output=falco-plugin/ .
FROM scratch AS deploy-source
COPY --from=builder /src/falco-plugin/*.so /

[leogr]

Btw, to build and publish our plugins, we currently use this 👇
https://github.com/falcosecurity/test-infra/blob/master/images/build-plugins/Dockerfile#L6

[poiana]

Issues go stale after 90d of inactivity.

Mark the issue as fresh with /remove-lifecycle stale.

Stale issues rot after an additional 30d of inactivity and eventually close.

If this issue is safe to close now please do so with /close.

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/lifecycle stale

[jasondellaluce]

/remove-lifecycle stale

[poiana]

Issues go stale after 90d of inactivity.

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/lifecycle stale

[leogr]

/remove-lifecycle stale

@falcosecurity/falco-maintainers Shall we do the same for Falco?

[poiana]

Issues go stale after 90d of inactivity.

Mark the issue as fresh with /remove-lifecycle stale.

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/lifecycle stale

[leogr]

/remove-lifecycle stal

[leogr]

cc @vjjmiras

[poiana]

Stale issues rot after 30d of inactivity.

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/lifecycle rotten

[vjjmiras]

/remove-lifecycle rotten

[vjjmiras]

cc @vjjmiras

I wasn't aware of this issue. I'll take care of it.

[poiana]

Issues go stale after 90d of inactivity.

Mark the issue as fresh with /remove-lifecycle stale.

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/lifecycle stale

[FedeDP]

/remove-lifecycle stale

[leogr]

/help

cc @therealbobo @Andreagit97

[poiana]

@leogr:
This request has been marked as needing help from a contributor.

Please ensure the request meets the requirements listed here.

If this request no longer meets these requirements, the label can be removed
by commenting with the /remove-help command.

In response to this:

/help

cc @therealbobo @Andreagit97

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[poiana]

Issues go stale after 90d of inactivity.

Mark the issue as fresh with /remove-lifecycle stale.

Stale issues rot after an additional 30d of inactivity and eventually close.

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/lifecycle stale

[poiana]

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/lifecycle rotten

[Andreagit97]

/remove-lifecycle rotten

[poiana]

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/lifecycle stale

[Andreagit97]

/remove-lifecycle stale

[leogr]

/assign leogr
/assign LucaGuerra

[poiana]

Issues go stale after 90d of inactivity.

Mark the issue as fresh with /remove-lifecycle stale.

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/lifecycle stale

[leogr]

/remove-lifecycle stale

[leogr]

For the record, recently we upgraded golang in our CI, and broke the glibc compatibility.

@LucaGuerra and I are investigating.

[leogr]

For the record, recently we upgraded golang in our CI, and broke the glibc compatibility.

@LucaGuerra and I are investigating.

Fix: https://github.com/falcosecurity/plugins/pull/497/files

[leogr]

Update (as discussed with @LucaGuerra):

At the time of writing, Falco requires GLIBC 2.17 or newer (this is, however, not officially documented yet)

For plugins shipped with this repository, based on the current CI builder (using the golang:1.22-bullseye image 👇 ) the minimum guaranteed compatibility is with GLIBC 2.31. However, most plugins need a reduced set of GLIBC symbols and are usually compatible with older versions of GLIBC.

plugins/.github/workflows/reusable_build_packages.yaml

Lines 21 to 23 in 512f1ff

	# Upgrading to a newer debian version would make the build process generate
	# binaries that require newer GLIBC version so we need to be based on bullseye for now
	container: golang:1.22-bullseye

❯ docker run --rm -it golang:1.22-bullseye sh
# /lib/x86_64-linux-gnu/libc.so.6
GNU C Library (Debian GLIBC 2.31-13+deb11u10) stable release version 2.31.
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 10.2.1 20210110.
libc ABIs: UNIQUE IFUNC ABSOLUTE
For bug reporting instructions, please see:
<http://www.debian.org/Bugs/>.