Add docker build files of 4 linux distros

The intention of these docker files is to run build test before send PR
and to solve build failure issues derived from less common distros.

Docker version 20 is required to build images correctly. In docker
version 19, when some conditions related to kernel and glibc versions
are satisfied, `[' command fails during building docker images. Because
`faccessat2' syscall is not whitelisted.

References
https://bugzilla.redhat.com/show_bug.cgi?id=1900021
https://github.com/moby/moby/pull/41353/files

scripts/Dockerfile-alpine-20210212

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+FROM alpine:20210212
+RUN apk update && apk add llvm11-dev clang-dev build-base zlib-dev curl clang-static llvm-static libxml2-dev linux-headers
+ENV CARGO_HOME /usr/local
+ENV RUSTUP_HOME /usr/local
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
+ARG KERNEL_HEADERS_TAR
+ADD $KERNEL_HEADERS_TAR /
+ARG REDBPF_TAR
+ADD $REDBPF_TAR /
+WORKDIR /redbpf
+ENV RUSTFLAGS -Ctarget-feature=-crt-static
+CMD cargo build

scripts/Dockerfile-arch-20210321

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+FROM archlinux:base-devel-20210321.0.17674
+RUN pacman -Sy --noconfirm llvm clang zlib
+ENV CARGO_HOME /usr/local
+ENV RUSTUP_HOME /usr/local
+RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
+ARG KERNEL_HEADERS_TAR
+ADD $KERNEL_HEADERS_TAR /
+ARG REDBPF_TAR
+ADD $REDBPF_TAR /
+WORKDIR /redbpf
+CMD cargo build

scripts/Dockerfile-fedora-35

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+FROM fedora:rawhide
+RUN yum update -y && yum install -y clang llvm-devel zlib-devel
+ENV CARGO_HOME /usr/local
+ENV RUSTUP_HOME /usr/local
+RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
+ARG KERNEL_HEADERS_TAR
+ADD $KERNEL_HEADERS_TAR /
+ARG REDBPF_TAR
+ADD $REDBPF_TAR /
+WORKDIR /redbpf
+CMD cargo build

scripts/Dockerfile-ubuntu-20.10

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+FROM ubuntu:groovy
+RUN apt update && apt install -y build-essential zlib1g-dev llvm-11-dev libclang-11-dev curl
+ENV CARGO_HOME /usr/local
+ENV RUSTUP_HOME /usr/local
+RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
+ARG KERNEL_HEADERS_TAR
+ADD $KERNEL_HEADERS_TAR /
+ARG REDBPF_TAR
+ADD $REDBPF_TAR /
+WORKDIR /redbpf
+CMD cargo build

scripts/build-image.sh

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+#!/bin/bash
+
+DISTRO=$1
+case $DISTRO in
+    fedora-35|ubuntu-20.10|arch-20210321|alpine-20210212)
+        ;;
+    *)
+        echo "error: unknown distro. choose one of <ubuntu-20.10|fedora-35|arch-20210321>" >&2
+        exit 1
+        ;;
+esac
+
+if [[ -z $KERNEL_SOURCE ]]; then
+    KERNEL_SOURCE=/lib/modules/$(uname -r)
+fi
+
+if ! [[ -e $KERNEL_SOURCE ]]; then
+    echo "error: kernel headers not found" >&2
+    exit 1
+fi
+
+BINDIR=$(readlink -f $(dirname $0))
+cd $BINDIR
+ROOTDIR=$(git rev-parse --show-toplevel)
+cd $ROOTDIR
+UNIQUE=$(tr -dc '[:alnum:]' < /dev/urandom |head -c 16)
+TEMPDIR=$(mktemp -p $ROOTDIR -d)
+git archive --prefix=redbpf/ --format=tar -o $TEMPDIR/$UNIQUE.tar HEAD
+while read SM_TAR; do
+    tar -Af $TEMPDIR/${UNIQUE}.tar ${SM_TAR}
+    rm -f ${SM_TAR}
+done < <(git submodule foreach -q \
+             "git archive --prefix=redbpf/\$sm_path/ --format=tar -o ${UNIQUE}.tar HEAD; echo \$sm_path/${UNIQUE}.tar")
+cd $TEMPDIR
+KERNEL_HEADERS_TAR=$(uname -r).tar
+tar -hcf $KERNEL_HEADERS_TAR $KERNEL_SOURCE
+
+cp $BINDIR/Dockerfile-${DISTRO} Dockerfile
+docker build -t redbpf-build-env:${DISTRO} \
+       --build-arg REDBPF_TAR=${UNIQUE}.tar \
+       --build-arg KERNEL_HEADERS_TAR=${KERNEL_HEADERS_TAR} .
+
+rm -rf ${TEMPDIR:?}

scripts/build-test.sh

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+#!/bin/bash
+
+BINDIR=$(dirname $(readlink -f $0))
+cd $BINDIR
+for DISTRO in fedora-35 ubuntu-20.10 arch-20210321 alpine-20210212; do
+    ./build-image.sh $DISTRO
+done
+
+# Make a machine sounds like a jet or melt CPUs..
+docker-compose up

scripts/docker-compose.yml

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+version: "3"
+services:
+  fedora-35:
+    image: redbpf-build-env:fedora-35
+  ubuntu-20.10:
+    image: redbpf-build-env:ubuntu-20.10
+  arch-20210321:
+    image: redbpf-build-env:arch-20210321
+  alpine-20210212:
+    image: redbpf-build-env:alpine-20210212