From db5d31d563aefb02b0872cad2f0779a4ef005c5d Mon Sep 17 00:00:00 2001
From: Mikhail Klementev <blame@dumpstack.io>
Date: Sat, 30 May 2020 13:42:47 +0000
Subject: [PATCH] CentOS 8 image generator

---
 tools/qemu-centos-img/8/Dockerfile  | 56 +++++++++++++++++++++++++++++
 tools/qemu-centos-img/8/generate.sh |  6 ++++
 2 files changed, 62 insertions(+)
 create mode 100644 tools/qemu-centos-img/8/Dockerfile
 create mode 100755 tools/qemu-centos-img/8/generate.sh

diff --git a/tools/qemu-centos-img/8/Dockerfile b/tools/qemu-centos-img/8/Dockerfile
new file mode 100644
index 0000000..2502864
--- /dev/null
+++ b/tools/qemu-centos-img/8/Dockerfile
@@ -0,0 +1,56 @@
+# Copyright 2020 Mikhail Klementev. All rights reserved.
+# Use of this source code is governed by a AGPLv3 license
+# (or later) that can be found in the LICENSE file.
+#
+# Usage:
+#
+#     $ sudo docker build -t gen-centos8-image .
+#     $ sudo docker run --privileged -v $(pwd):/shared -t gen-centos8-image
+#     $ tar -Szcf out_of_tree_centos_8.img.tar.gz out_of_tree_centos_8.img
+#
+# out_of_tree_centos_8.img will be created in current directory.
+# You can change $(pwd) to different directory to use different destination
+# for image.
+#
+FROM centos:8
+
+RUN yum -y update
+RUN yum -y groupinstall "Development Tools"
+RUN yum -y install qemu-img e2fsprogs
+
+ENV TMPDIR=/tmp/centos
+
+RUN yum --installroot=$TMPDIR \
+        --releasever=8 \
+        --disablerepo='*' \
+        --enablerepo=BaseOS \
+        -y groupinstall Base
+RUN yum --installroot=$TMPDIR \
+        --releasever=8 \
+        --disablerepo='*' \
+        --enablerepo=BaseOS \
+        -y install openssh-server openssh-clients
+
+RUN chroot $TMPDIR /bin/sh -c 'useradd -m user'
+RUN sed -i 's/root:\*:/root::/' $TMPDIR/etc/shadow
+RUN sed -i 's/user:!!:/user::/' $TMPDIR/etc/shadow
+RUN sed -i '/PermitEmptyPasswords/d' $TMPDIR/etc/ssh/sshd_config
+RUN echo PermitEmptyPasswords yes >> $TMPDIR/etc/ssh/sshd_config
+RUN sed -i '/PermitRootLogin/d' $TMPDIR/etc/ssh/sshd_config
+RUN echo PermitRootLogin yes >> $TMPDIR/etc/ssh/sshd_config
+
+# network workaround
+RUN chmod +x $TMPDIR/etc/rc.local
+RUN echo 'dhclient' >> $TMPDIR/etc/rc.local
+
+ENV IMAGEDIR=/tmp/image
+ENV IMAGE=/shared/out_of_tree_centos_8.img
+
+RUN mkdir $IMAGEDIR
+
+# Must be executed with --privileged because of /dev/loop
+CMD qemu-img create $IMAGE 2G && \
+	mkfs.ext4 -F $IMAGE && \
+	mount -o loop $IMAGE $IMAGEDIR && \
+	cp -a $TMPDIR/* $IMAGEDIR/ && \
+	umount $IMAGEDIR
diff --git a/tools/qemu-centos-img/8/generate.sh b/tools/qemu-centos-img/8/generate.sh
new file mode 100755
index 0000000..0ab64e4
--- /dev/null
+++ b/tools/qemu-centos-img/8/generate.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+cd "$(dirname "$0")"
+
+sudo docker build -t gen-centos8-image .
+sudo docker run --privileged -v $(pwd):/shared -t gen-centos8-image
+tar -Szcf out_of_tree_centos_8.img.tar.gz out_of_tree_centos_8.img