Add docker files for build environment and generation of kernels

tools/kernel-factory/.gitignore

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+output

tools/kernel-factory/CentOS/6/Dockerfile

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+FROM centos:6
+
+# Last release must be download from mirror.centos.org, because vault.centos.org
+# does not containt repodata for last release.
+RUN yum list --showduplicates kernel \
+	| grep kernel | awk '{print $2}' | while read VERSION; do \
+			echo kernel-devel-${VERSION} kernel-${VERSION}; \
+		done | xargs yum install -y;
+
+# mirror.centos.org does not contain old releases.
+RUN sed -i 's/^mirrorlist/#mirrorlist/' /etc/yum.repos.d/*
+RUN sed -i 's;^#baseurl=http://mirror.centos.org/centos/;baseurl=http://vault.centos.org/;' /etc/yum.repos.d/*
+
+# do not remove old kernels
+RUN sed -i 's;installonly_limit=;installonly_limit=100500;' /etc/yum.conf
+
+# After new release must put PREVIOUS version here, e.g. at the time of
+# writing the comment last CentOS version was 6.10.
+RUN for RELEASEVER in 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9; do \
+	yum list --releasever=${RELEASEVER} --showduplicates kernel \
+		| grep kernel | awk '{print $2}' | while read VERSION; do \
+				echo kernel-devel-${VERSION} kernel-${VERSION}; \
+			done | xargs yum install --releasever=${RELEASEVER} -y; \
+	done

tools/kernel-factory/CentOS/7/Dockerfile

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+FROM centos:7
+
+# Last release must be download from mirror.centos.org, because vault.centos.org
+# does not containt repodata for last release.
+RUN yum list --showduplicates kernel \
+	| grep kernel | awk '{print $2}' | while read VERSION; do \
+			echo kernel-devel-${VERSION} kernel-${VERSION}; \
+		done | xargs yum install -y;
+
+# mirror.centos.org does not contain old releases.
+RUN sed -i 's/^mirrorlist/#mirrorlist/' /etc/yum.repos.d/*
+RUN sed -i 's;^#baseurl=http://mirror;baseurl=http://vault;' /etc/yum.repos.d/*
+
+# do not remove old kernels
+RUN sed -i 's;installonly_limit=;installonly_limit=100500;' /etc/yum.conf
+
+# After new release must put PREVIOUS version here, e.g. at the time of
+# writing the comment last CentOS version was 7.5.1804.
+RUN for RELEASEVER in 7.0.1406 7.1.1503 7.2.1511 7.3.1611 7.4.1708; do \
+	yum list --releasever=${RELEASEVER} --showduplicates kernel \
+		| grep kernel | awk '{print $2}' | while read VERSION; do \
+				echo kernel-devel-${VERSION} kernel-${VERSION}; \
+			done | xargs yum install --releasever=${RELEASEVER} -y; \
+	done

tools/kernel-factory/Debian/7/Dockerfile

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+FROM debian:7
+
+RUN apt-get update
+#RUN DEBIAN_FRONTEND=noninteractive apt-get install -y...

tools/kernel-factory/Debian/8/Dockerfile

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+FROM debian:8
+
+RUN apt-get update
+#RUN DEBIAN_FRONTEND=noninteractive apt-get install -y...

tools/kernel-factory/Debian/9/Dockerfile

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+FROM debian:9
+
+RUN apt-get update
+#RUN DEBIAN_FRONTEND=noninteractive apt-get install -y...

tools/kernel-factory/Debian/TODO

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+1. Lookup kernel in https://snapshot.debian.org/package/linux*
+2. Go to snapshot (e.g. https://snapshot.debian.org/archive/debian/20120612T040311Z/pool/main/l/linux/)
+3. Checkout release version
+4. ...

tools/kernel-factory/Ubuntu/14.04/Dockerfile

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+FROM ubuntu:14.04
+
+RUN apt-get update
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y linux-image-3*-generic linux-image-4*-generic linux-headers-*-generic

tools/kernel-factory/Ubuntu/16.04/Dockerfile

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+FROM ubuntu:16.04
+
+RUN apt-get update
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y linux-image-4*-generic linux-headers-*-generic

tools/kernel-factory/Ubuntu/18.04/Dockerfile

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+FROM ubuntu:18.04
+
+RUN apt-get update
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y linux-image-4*-generic linux-headers-*-generic