feat: Extend regexp processor do allow renaming of measurements, tags and fields

[srebhan]

• Updated associated README.md.
• Wrote appropriate unit tests.

resolves #5159
resolves #9506
resolves #9557

related to #6830, #6831

With this PR, the regexp processor is able to rename measurements, tags and fields using regular expressions. To do so, the user specifies what to rename using the key property. Furthermore, the user has control over the behavior in case the resulting tag or field name already exists by changing the result_key value between overwrite and keep.

[telegraf-tiger]

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• windows_i386.zip

• darwin_amd64.tar.gz

• x86_64.rpm

• freebsd_amd64.tar.gz

• linux_amd64.tar.gz

• amd64.deb

• armv6hl.rpm

• freebsd_armv7.tar.gz

• linux_armhf.tar.gz

• armhf.deb

• linux_mipsel.tar.gz

• mipsel.deb

• armel.rpm

• linux_armel.tar.gz

• armel.deb

• static_linux_amd64.tar.gz

• s390x.rpm

• linux_s390x.tar.gz

• s390x.deb

• linux_mips.tar.gz

• mips.deb

• i386.rpm

• freebsd_i386.tar.gz

• linux_i386.tar.gz

• i386.deb

• ppc64le.rpm

• linux_ppc64le.tar.gz

• ppc64el.deb

• aarch64.rpm

• linux_arm64.tar.gz

• arm64.deb

[helenosheaa]

Thanks for doing this @srebhan! Someone was just asking about this functionality yesterday. The extended measurement functionality looks great and nice refactor.

[ihard]

Hi, I tested the assembly, it works as expected on my data (correct replacement of metric names).

[bai]

👋🏼 Friendly bump to see if it's something that can be shipped?

[srebhan]

@bai I'm waiting for the response of @reimda if adding sections processors.regex.tag_rename, processors.regex.field_rename and processors.regex.metric_rename is ok for him as this would render the key field meaningless for those sections.
Once I get the feedback, I can change the code. :-)

[telegraf-tiger]

📦 Looks like new artifacts were built from this PR.

Expand this list to get them here! 🐯

Artifact URLs

DEB	RPM	TAR GZ	ZIP
amd64.deb	aarch64.rpm	darwin_amd64.tar.gz	windows_amd64.zip
arm64.deb	armel.rpm	freebsd_amd64.tar.gz	windows_i386.zip
armel.deb	armv6hl.rpm	freebsd_armv7.tar.gz
armhf.deb	i386.rpm	freebsd_i386.tar.gz
i386.deb	ppc64le.rpm	linux_amd64.tar.gz
mips.deb	s390x.rpm	linux_arm64.tar.gz
mipsel.deb	x86_64.rpm	linux_armel.tar.gz
ppc64el.deb		linux_armhf.tar.gz
s390x.deb		linux_i386.tar.gz
		linux_mips.tar.gz
		linux_mipsel.tar.gz
		linux_ppc64le.tar.gz
		linux_s390x.tar.gz
		static_linux_amd64.tar.gz

[powersj]

@reimda can you sign-off on this PR? You had a previous discussion around naming and functionality that would be good to get your +1 on.

Thanks!

[reimda]

During my first review I thought there was overlap of functionality with the old settings and new ones. It makes much more sense looking at it now. Sorry to delay merging.

@srebhan Was there anything else you wanted to change?

[srebhan]

No I'm happy with the current state when you are. :-)

[blockloop]

What version can we expect this to be part of?

[Hipska]

Hi, it is already available in the latest versions.