Switch builder images to use gcc images as base for any fallback target

[FedeDP]

Motivation

It would be much simpler for us to rely on the official gcc images: https://hub.docker.com/_/gcc.

Feature

Official gcc images are multi platform; support x86_64, arm64, arm32 and s390x.
Moreover, they are official, therefore they won't suddenly disappear.

Using them, we could drop the arch from our builder images regex, as all our builder images would be multiarch.
Moreover, we could cover any gcc version we want; finally, we would also have a single image for each gcc version (no more a single image that provides a list of gcc versions!)

I'd wait for #258 and the PR by Aldo to port the Images listing code from docker client to falcoctl.

WDYT @EXONER4TED @alacuku @Lowaiz @dwindsor ?

[FedeDP]

Considering that @alacuku will already port the builder images to correctly use a docker repository, in the end we would have: falcosecurity/docker-builder docker repository, with tags like:

• any_gcc4.9.1-latest
• any_gcc4.9.1-master
• any_gcc6.0.0-commithash
• centos_gcc4.8.5-latest

We will still need to support specific images (ie: images that do not rely on he official gcc ones but instead use distro-specific one, like the driverkit-builder-centos-x86_64_gcc4.8.5) because some drivers absolutely want their distro gcc to build.
Given that we will still support distro-specific images, i am not sure whether we want to retain the architecture field in the builder images regex name, as distro-specific images could be arch-specific.

[alacuku]

Given that we will still support distro-specific images, i am not sure whether we want to retain the architecture field in the builder images regex name, as distro-specific images could be arch-specific.

How many distros need a distro-specific image?

[FedeDP]

For now, we only had one case (the aforementioned centos one).
But we cannot tell it in advance unfortunately. Only time will tell!

[poiana]

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[FedeDP]

/remove-lifecycle stale

[poiana]

Issues go stale after 90d of inactivity.

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/lifecycle stale

[FedeDP]

/remove-lifecycle stale

[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

[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

[FedeDP]

/remove-lifecycle stale

[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

[FedeDP]

/remove-lifecycle stale

[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

[FedeDP]

/remove-lifecycle stale

[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

[FedeDP]

/remove-lifecycle stale