feat(build): debian package building

Signed-off-by: Boaz Sade <boaz@dragonflydb.io>

tools/packaging/README.md

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+# Installation Packages
+
+## Overview
+This directory includes a set of files and scripts to build installation package for various Linux distributions.
+
+## Debian
+The file to build the Debian package all located under "debian" directory.
+The resulting package will install the binary of Dragonfly as well as generate a new service entry for dragonfly,
+that can be controlled with "systemctl" command, to start, stop and check status of.
+### Building
+To build the package, you have a script called "generate_debian_package.sh". This script accepts the following parameters:
+* Optional binary path - the location from which to take the binary for the installation. The default for this is "repo path/build-opt".
+The location to which the resulting package is writing is at the location from which the script is executed.
+This script is depends on the following packages:
+* git
+* moreutils
+* debhelper
+* dpkg-dev
+
+To build:
+```
+/path/to/dragonfly/tools/packaging/generate_debian_package.sh [/path/to/dragonfly-binary-file]
+```
+
+This can only be run on Debian based hosts.
+You can use the flowing docker file to generate this package:
+```
+FROM ubuntu:20.04
+ARG DEBIAN_FRONTEND=noninteractive
+RUN apt update -y && apt-get install -y gcc dpkg-dev gpg vim wget git moreutils debhelper
+```
+Build the above docker and then run it with your dragonfly source code path mount as volume for the build:
+```
+docker build -t ubuntu-package .
+docker run --rm -ti -v /path/to/dragonfly-repo:/mydocker-path ubuntu-package bash
+```
+Again note that you need to be at "main" branch to successfully build this package.
+Note: If at the end of the installation you see a message "/usr/bin/deb-systemd-helper: error: systemctl preset failed on dragonfly.service: No such file or directory",
+you can ignore it, this seem to be related to [the following issue](https://groups.google.com/g/linux.debian.bugs.dist/c/m6xGZ82TdvM).

tools/packaging/debian/compat

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+11

tools/packaging/debian/control

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+Source: dragonfly
+Maintainer: DragonflyDB authors  <dragonfly@dragonflydb.io>
+Standards-Version:  4.2.1
+Priority: optional
+Section: database
+Vcs-Git: https://github.com/dragonflydb/dragonfly
+
+Package: dragonfly
+Architecture: amd64 arm64
+Depends: libc6, openssl, adduser, systemctl
+Homepage: https://dragonflydb.io
+Description: A fast in-memory store that is fully compatible with Redis™* and Memcached.

tools/packaging/debian/dragonfly.conf

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+--pidfile=/var/run/dragonfly/dragonfly.pid
+--log_dir=/var/log/dragonfly
+--dir=/var/run/dragonfly
+--version_check=true

tools/packaging/debian/dragonfly.install

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+debian/dragonfly.service /lib/systemd/system
+debian/dragonfly.conf	/etc/dragonfly
+debian/bin/dragonfly /usr/bin

tools/packaging/debian/dragonfly.logrotate

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+/var/log/dragonfly/dragonfly* {
+        weekly
+        missingok
+        rotate 12
+        compress
+        notifempty
+}

tools/packaging/debian/dragonfly.postinst

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+#!/bin/sh
+
+# Script to run at the end of the installation
+set -eu
+
+USER="dfly"
+DIR_NAME="dragonfly"
+GROUP="$USER"
+CONFFILE="/etc/${DIR_NAME}/${DIR_NAME}.conf"
+
+if [ "$1" = "configure" ]
+then
+	if ! dpkg-statoverride --list ${CONFFILE} >/dev/null 2>&1
+	then
+		dpkg-statoverride --update --add ${USER} ${GROUP} 640 ${CONFFILE}
+	fi
+fi
+
+#DEBHELPER#
+
+if [ "$1" = "configure" ]
+then
+	find /etc/${DIR_NAME} -maxdepth 1 -type d -name '${DIR_NAME}.*.d' -empty -delete
+fi
+
+exit 0

tools/packaging/debian/dragonfly.postrm

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+#!/bin/sh
+# Script to run at the end of remove
+set -eu
+DIR_NAME="dragonfly"
+USER_NAME="dfly"
+CONFFILE="/etc/${DIR_NAME}/${DIR_NAME}.conf"
+
+# When purging the package, remove all trances
+if [ "${1}" = "purge" ]
+then
+	userdel ${USER_NAME} || true
+	rm -rf /var/lib/${DIR_NAME} /var/log/${DIR_NAME} /etc/${DIR_NAME} /var/run/${DIR_NAME}
+	dpkg-statoverride --remove ${CONFFILE} || test $? -eq 2
+fi
+
+#DEBHELPER#
+
+exit 0

tools/packaging/debian/dragonfly.preinst

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+#!/bin/sh
+
+set -eu
+# Script to run before the installation starts.
+# We are creating a user "dragonfly", and the directories that
+# would be used by the application
+
+USER="dfly"
+DIR_NAME="dragonfly"
+
+setup_dir () {
+	DIR="${1}"
+	MODE="${2}"
+	GROUP="${3}"
+
+	mkdir -p ${DIR} || {
+		echo "failed to create dir ${DIR}"
+		return 1
+	}
+
+	if ! dpkg-statoverride --list ${DIR} >/dev/null 2>&1
+	then
+		echo "changing owner for ${DIR} to user ${USER}"
+		chown ${USER}:${GROUP} ${DIR}
+		chmod ${MODE} ${DIR}
+	fi
+}
+
+if [ "$1" = "install" ]; then
+	if ! id ${USER} >/dev/null 2>&1 ; then
+		echo "trying to create user ${USER}"
+		adduser \
+			--system \
+			--home /var/lib/${DIR_NAME} \
+			--quiet \
+			--group \
+			${USER} || {
+			echo "failed to add user ${USER}"
+			exit 1
+		}
+
+		setup_dir /var/log/${DIR_NAME} 2755 adm
+		setup_dir /var/lib/${DIR_NAME} 755 ${USER}
+		setup_dir /var/run/${DIR_NAME} 755 ${USER}
+		setup_dir /etc/${DIR_NAME} 2775 ${USER}
+	fi
+fi
+#DEBHELPER#
+
+exit 0

tools/packaging/debian/dragonfly.service

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+[Unit]
+Description=Modern and fast key-value store
+After=network.target
+Documentation=
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/dragonfly --flagfile=/etc/dragonfly/dragonfly.conf
+PIDFile=/var/run/dragonfly/dragonfly.pid
+TimeoutStopSec=0
+Restart=always
+User=dfly
+Group=dfly
+RuntimeDirectory=dragonfly
+RuntimeDirectoryMode=2755
+
+UMask=007
+PrivateTmp=yes
+LimitNOFILE=65535
+PrivateDevices=yes
+ProtectHome=yes
+ReadOnlyDirectories=/
+ReadWritePaths=-/var/lib/dragonfly
+ReadWritePaths=-/var/log/dragonfly
+ReadWritePaths=-/var/run/dragonfly
+
+NoNewPrivileges=true
+CapabilityBoundingSet=CAP_SETGID CAP_SETUID CAP_SYS_RESOURCE
+MemoryDenyWriteExecute=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+ProtectControlGroups=true
+RestrictRealtime=true
+RestrictNamespaces=true
+RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
+
+ProtectSystem=true
+ReadWriteDirectories=-/etc/dragonfly
+
+[Install]
+WantedBy=multi-user.target
+Alias=dragonfly.service

tools/packaging/debian/rules

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+#!/usr/bin/make -f
+
+%:
+	dh $@
+
+
+override_dh_auto_build:
+	@echo "no build is done here"
+
+override_dh_installchangelogs:
+	@echo "no change long installation"
+
+override_dh_auto_test:
+	@echo "no testing"
+
+override_dh_auto_clean:
+	dh_auto_clean

tools/packaging/generate_changelog.sh

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+#!/usr/bin/env bash
+
+# This would generate a change log required for build Debian installation package.
+# Don't run this script on your local machine, run this inside docker
+# you would need to install git client as well as moreutils
+# apt install -y git moreutils
+# note: This script should run on branch "main".
+
+set -eu
+
+if [ $# -ne 1 ]; then
+	echo "usage: <git repo path> <target path>"
+	exit 1
+fi
+SCRIPT_ABS_PATH=$(realpath $0)
+
+THIS_DIR=$(dirname ${SCRIPT_ABS_PATH})
+GIT_DIR=$1
+PACKGE_DIR=${THIS_DIR}/debian
+CHANGE_LOG=${PACKGE_DIR}/changelog
+
+cd ${GIT_DIR}
+git config --global --add safe.directory ${GIT_DIR}
+>${CHANGE_LOG}
+prevtag=v0.2.0
+pkgname=`cat ${PACKGE_DIR}/control | grep '^Package: ' | sed 's/^Package: //'`
+git tag -l v* | sort -V | while read tag; do
+    (echo "$pkgname (${tag#v}) unstable; urgency=low"; git log --pretty=format:'  * %s' $prevtag..$tag; git log --pretty='format:%n%n -- %aN <%aE>  %aD%n%n' $tag^..$tag) | cat - ${CHANGE_LOG} | sponge ${CHANGE_LOG}
+        prevtag=$tag
+done

tools/packaging/generate_debian_package.sh

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+#!/usr/bin/env bash
+
+# Generate a debian package from a pre-build dragonfly bianry and set of files as well as generating change log from git history.
+# The result is debian install package file (.deb file).
+# This script accept 2 parameters:
+#	1. Optioanl path to the location at which the binary file is located.
+# this depends on
+# * git
+# * moreutils
+# * debhelper
+# e.g. apt update -y && apt install -y git moreutils debhelper
+# Please note that is must run from main branch.
+# Best running this from inside a container.
+# The result are writing to the location from which you would execute the script (not where the script is located).
+# Version number is the tag number. Currently this would only generate a package for amd64.
+
+
+set -eu
+
+SCRIPT_ABS_PATH=$(realpath $0)
+SCRIPT_PATH=$(dirname ${SCRIPT_ABS_PATH})
+PACKAGES_PATH=${SCRIPT_PATH}/debian
+CHANGELOG_SCRIPT=generate_changelog.sh
+BUILD_DIR=build-opt
+ROOT_ABS_PATH=$(cd ${SCRIPT_PATH}; while [ ! -d ${BUILD_DIR} ]; do cd ..; done ; pwd)
+REPO_PATH=${ROOT_ABS_PATH}
+TEMP_WORK_DIR=$(mktemp -d)
+BASE_DIR=${TEMP_WORK_DIR}/packges
+ARCH_VAL=amd64
+BASE_PATH=${BASE_DIR}/dragonfly_${ARCH_VAL}
+BINARY_TARGET_DIR=${BASE_PATH}/debian/bin
+
+function cleanup {
+	echo $@
+	rm -rf ${TEMP_WORK_DIR}
+	exit 1
+}
+
+if [ $# -ge 1 ]; then
+	VERSION_FILE=$1
+else
+	if ! [ -f ${ROOT_ABS_PATH}/${BUILD_DIR}/dragonfly ]; then
+		cleanup "no dragonfly binary found at ${ROOT_ABS_PATH}/${BUILD_DIR}"
+	else
+		VERSION_FILE=${ROOT_ABS_PATH}/${BUILD_DIR}/dragonfly
+	fi
+fi
+
+mkdir -p ${BASE_PATH} || cleanup "failed to create working directory for building the package"
+
+cp -r ${PACKAGES_PATH} ${BASE_PATH} || cleanup "failed to copy required for the package build from ${PACKAGES_PATH}"
+
+cp ${SCRIPT_PATH}/${CHANGELOG_SCRIPT} ${BASE_PATH} || cleanup "failed to copy changelog script to ${BASE_PATH}"
+
+mkdir -p ${BINARY_TARGET_DIR} || cleanup "failed to create install directory for building the package"
+
+cp ${VERSION_FILE} ${BINARY_TARGET_DIR}/dragonfly || cleanup "failed to copy binary to target dir"
+
+${BASE_PATH}/${CHANGELOG_SCRIPT} ${REPO_PATH} || cleanup "failed to generate changelog for package"
+
+MY_DIR=${PWD}
+cd ${BASE_PATH} && dpkg-buildpackage --build=binary || cleanup "failed to generate the package"
+TEMP_RESULT_FILE=$(ls ../*.deb)
+
+mv ${TEMP_RESULT_FILE} ${MY_DIR} && cd ${MY_DIR}
+RESULT_FILE=$(ls *.deb 2>/dev/null)
+if [ "$RESULT_FILE" = "" ]; then
+	cleanup "failed to find build result file"
+fi
+echo "successfully build the install package at ${MY_DIR}/${RESULT_FILE}"
+rm -rf ${TEMP_WORK_DIR}
+exit 0