feat(inputs.p4runtime): Implementation of P4Runtime input plugin

[jokuniew]

Co-Authored-By: Jakub Sikorski jakub.sikorski@intel.com

Required for all PRs

• Updated associated README.md.
• Wrote appropriate unit tests.
• Pull request title or commits are in conventional commit format

resolves #12470

P4Runtime is a gRPC server whose API is used to interact with a control plane specification for controlling the data plane elements of a device defined or described by a P4 program.

P4Runtime Specification: https://p4.org/p4-spec/docs/p4runtime-spec-working-draft-html-version.html

P4 programmable pipelines provide the flexibility of adding custom counters that can help observe the pipeline's operation. We provide the means to evaluate the effectiveness of those pipelines via exposed counters. That is the motivation why we would like to have a Telegraf input plugin that exposes P4Runtime Counters metrics.

[telegraf-tiger]

Thanks so much for the pull request!
🤝 ✒️ Just a reminder that the CLA has not yet been signed, and we'll need it before merging. Please sign the CLA when you get a chance, then post a comment here saying !signed-cla

[powersj]

Hi,

Thank you for the PR! I have done an initial first pass through this. While I have seen your issue, my high-level question is, what is P4Runtime used for? What devices, systems, etc. use this? Trying to understand what the target user is and what we would need to support this.

Thanks!

[jokuniew]

Hi,

Thank you for the PR! I have done an initial first pass through this. While I have seen your issue, my high-level question is, what is P4Runtime used for? What devices, systems, etc. use this? Trying to understand what the target user is and what we would need to support this.

Thanks!

Added brief info about P4 and P4Runtime at the beginning of README.md

[jokuniew]

I don't know what's going on with run-readme-linter job, but for this readme result is:
Pass plugins/inputs/p4runtime/README.md

[powersj]

Thanks for the updates! Think I am good except for the coutner_index as a tag. Maybe if I saw more example data that you are parsing, but as of now having an 'index' as a tag is a red flag.

Thanks again!

[powersj]

Thanks!

[srebhan]

Very nice code @jokuniew! I do have some smaller comments though. Can you please take a look!?

[telegraf-tiger]

Download PR build artifacts for linux_amd64.tar.gz, darwin_amd64.tar.gz, and windows_amd64.zip.
Downloads for additional architectures and packages are available below.

⚠️ This pull request increases the Telegraf binary size by 2.86 % for linux amd64 (new size: 166.4 MB, nightly size 161.7 MB)

📦 Click here to get additional PR build artifacts

Artifact URLs

DEB	RPM	TAR GZ	ZIP
amd64.deb	aarch64.rpm	darwin_amd64.tar.gz	windows_amd64.zip
arm64.deb	armel.rpm	darwin_arm64.tar.gz	windows_arm64.zip
armel.deb	armv6hl.rpm	freebsd_amd64.tar.gz	windows_i386.zip
armhf.deb	i386.rpm	freebsd_armv7.tar.gz
i386.deb	ppc64le.rpm	freebsd_i386.tar.gz
mips.deb	riscv64.rpm	linux_amd64.tar.gz
mipsel.deb	s390x.rpm	linux_arm64.tar.gz
ppc64el.deb	x86_64.rpm	linux_armel.tar.gz
riscv64.deb		linux_armhf.tar.gz
s390x.deb		linux_i386.tar.gz
		linux_mips.tar.gz
		linux_mipsel.tar.gz
		linux_ppc64le.tar.gz
		linux_riscv64.tar.gz
		linux_s390x.tar.gz

[srebhan]

Looks good to me. Thanks for the fast and nice update @jokuniew!