Init Percona XtraDB Cluster install script
Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>
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#!/bin/sh
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# Basic Percona XtraDB Cluster Server installation script
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# Intended to be run on openSUSE Leap, but is easily adaptable by changing the package manager call in check_dependencies.
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#
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# Georg Pfuetzenreuter <georg@lysergic.dev>
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# Created and last modified: 30/04/2022
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SCRIPT="PXC_Boostrap"
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VENDOR="Percona"
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VERSION="8.0.27"
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PRODUCT="$VENDOR-XtraDB-Cluster_$VERSION-18.1_Linux.x86_64.glibc2.17-minimal"
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TARBALL="$PRODUCT.tar.gz"
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URL="https://downloads.percona.com/downloads/Percona-XtraDB-Cluster-LATEST/Percona-XtraDB-Cluster-8.0.27/binary/tarball/$TARBALL"
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TARGETPREFIX="/opt"
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TARGETDIR="$TARGETPREFIX/$VENDOR"
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TMPDIR="/tmp"
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SHORTY="mysql"
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DATADIR="/var/lib/$SHORTY"
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HOMEDIR="/var/lib/${SHORTY}_home"
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RUNDATE="`date +%m%d%Y-%H%M%S`"
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servicefile="/etc/systemd/system/${SHORTY}d.service"
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configfile="/etc/opt/my.cnf"
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checkfile="/var/adm/pxc.installed"
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ARGS="$@"
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check_args () {
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if [ "$ARGS" = "--debug" ]
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then
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RUNMODE="debug"
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# we do not use this here
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echo "Not implemented."
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exit 1
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fi
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if [ ! "$ARGS" = "--debug" ]
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then
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RUNMODE="normal"
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fi
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if [ "$ARGS" = "--uninstall" ]
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then
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RUNMODE="uninstall"
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fi
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}
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check_dependencies () {
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if ! command -v ex &>/dev/null
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then
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if zypper --non-interactive install vim-small
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then
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log "Satisfied dependencies."
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else
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log "Could not satisfy dependency \"ex\"."
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return 1
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fi
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fi
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if ! command -v systemctl &>/dev/null
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then
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log "Unsure whether this actually is a systemd based system."
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return 1
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fi
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}
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init () {
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local step="Preparation"
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if [ ! "`id -u`" = "0" ]
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then
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log "Script needs root privileges."
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exit 1
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fi
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log "Initializing $SCRIPT for $PRODUCT"
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check_args
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if [ "$RUNMODE" = "normal" ]
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then
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if [ -f "$checkfile" ]
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then
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log "Existing installation found. Consider --uninstall first."
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exit 1
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fi
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check_dependencies
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check "$?" "dependencies"
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cd $TMPDIR
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download
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setup
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touch "$checkfile"
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fi
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if [ "$RUNMODE" = "uninstall" ]
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then
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uninstall
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fi
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}
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log () {
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local printmsg="$1"
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local prefix="[$SCRIPT]"
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local logmsg="$prefix $printmsg"
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local logfile="$TMPDIR/$SCRIPT_$RUNDATE.log"
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echo "$printmsg"
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echo "$logmsg" >> $logfile
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}
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check () {
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local return="$1"
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local action="$2"
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if [ "$return" = "0" ]
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then
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log "$step: Action \"$action\" OK"
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else
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log "$step: Action \"$action\" failed"
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abort
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fi
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}
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abort () {
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local trash_link="$TARGETPREFIX/$SHORTY"
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local trash_dir="$TARGETDIR/$PRODUCT"
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local trash_dl1="$TMPDIR/$TARBALL"
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local trash_dl2="$TMPDIR/$checksum"
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if [ ! "$RUNMODE" = "uninstall" ]
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then
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log "Fatal error, aborting script ..."
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fi
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if [ -h "$trash_link" ]
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then
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log "Cleaning up installation ..."
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rm $trash_link
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if [ -d $trash_dir ]
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then
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rm -r $trash_dir
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fi
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fi
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if [ -f "$trash_dl1" ]
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then
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log "Cleaning up download ..."
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rm $trash_dl1
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if [ -f $trash_dl2 ]
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then
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rm $trash_dl2
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fi
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fi
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if [ -f "$servicefile" ]
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then
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log "Removing servicefile ..."
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systemctl disable ${SHORTY}d.service &>/dev/null
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rm $servicefile
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fi
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if [ ! "$RUNMODE" = "uninstall" ]
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then
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log "Exit."
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exit 1
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fi
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}
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download () {
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checksum="$TARBALL.sha256sum"
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log "Downloading release tarball ..."
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if [ -f $TARBALL ]
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then
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log "Removing stale files ..."
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rm $TARBALL
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fi
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if [ -f $checksum ]
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then
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rm $checksum
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fi
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curl -sSLo $TARBALL $URL
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curl -sSLo $checksum $URL.sha256sum
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if ! download_verify $checksum
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then
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log "Corrupted download, verify URL."
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exit 1
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fi
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}
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download_verify () {
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log "Verifying downloaded tarball ..."
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sha256sum -c $1
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}
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setup () {
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local step="Setup"
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for action in extract prepare install
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do
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setup_$action
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check "$?" "$action"
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done
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}
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setup_extract () {
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log "Deflating ..."
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if [ ! -d "$TARGETDIR" ]
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then
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mkdir "$TARGETDIR"
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fi
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tar -C $TARGETDIR -xzf $TARBALL
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}
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setup_prepare () {
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log "Preparing installation ..."
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local target="$TARGETDIR/$PRODUCT"
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local target_short="$TARGETPREFIX/$SHORTY"
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ln -s $target $target_short
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if ! getent group "$SHORTY" &>/dev/null
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then
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log "Creating group ..."
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if ! groupadd -r $SHORTY
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then
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log "Failed to create group."
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return 1
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fi
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fi
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if ! id "$SHORTY" &>/dev/null
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then
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log "Creating user ..."
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if ! useradd -g $SHORTY -d $HOMEDIR -rs /usr/sbin/nologin $SHORTY
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then
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log "Failed to create user."
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return 1
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fi
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if [ ! -d "$HOMEDIR" ]
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then
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if mkdir $HOMEDIR
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then
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if chown $SHORTY:$SHORTY $HOMEDIR
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then
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if ! chmod 750 $HOMEDIR
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then
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log "Failed to set homedir permissions."
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return 1
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fi
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else
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log "Failed to set homedir ownership."
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return 1
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fi
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else
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log "Failed to create home directory."
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return 1
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fi
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fi
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fi
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if ! chown -R $SHORTY:$SHORTY $target
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then
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log "Failed to change ownership."
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return 1
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fi
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if ! chmod 750 $target
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then
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log "Failed to change permissions."
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return 1
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fi
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}
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setup_install () {
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log "Placing systemd service ..."
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ex - $servicefile <<EOF_SERVICE
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insert
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[Unit]
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Description=Percona XtraDB Cluster Server
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After=syslog.target network.target
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[Service]
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User=$SHORTY
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Group=$SHORTY
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PIDFile=/run/$SHORTY/${SHORTY}d.pid
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ExecStart=$TARGETPREFIX/$SHORTY/bin/mysqld --defaults-file=$configfile
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RuntimeDirectory=$SHORTY
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ProtectSystem=strict
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ProtectHome=yes
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PrivateDevices=yes
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PrivateTmp=yes
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PrivateUsers=yes
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ProtectKernelTunables=yes
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ProtectKernelLogs=yes
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ProtectControlGroups=yes
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ReadWritePaths=/var/lib/$SHORTY
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ReadWritePaths=/var/log/$SHORTY
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[Install]
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WantedBy=multi-user.target
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.
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wq
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EOF_SERVICE
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if [ ! "$?" = "0" ]
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then
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log "Failed to create systemd service file."
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return 1
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fi
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log "Placing initial configuration ..."
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ex - $configfile <<EOF_CONFIG
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insert
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[client]
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socket=/run/mysql/mysql.sock
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[mysqld]
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datadir=$DATADIR
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socket=/run/$SHORTY/$SHORTY.sock
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log-error=/var/log/$SHORTY/${SHORTY}d.log
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port=3306
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bind-address = ::1
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server-id=1
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ssl_ca=/etc/pki/trust/anchors/syscid-ca.crt
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ssl_cert=/etc/ssl/MySQL/crt
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ssl_key=/etc/ssl/MySQL/key
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.
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wq
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EOF_CONFIG
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if [ ! "$?" = "0" ]
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then
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log "Failed to create configfile"
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return 1
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fi
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if [ ! -d "$DATADIR" ]
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then
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if mkdir $DATADIR
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then
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if chown $SHORTY:$SHORTY $DATADIR
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then
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if ! chmod 750 $DATADIR
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then
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log "Failed to set datadir permissions."
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return 1
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fi
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else
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log "Failed to set datadir ownership."
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return 1
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fi
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else
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log "Failed to create data directory."
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return 1
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fi
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fi
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}
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uninstall () {
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log "Removing user and group ..."
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userdel -f $SHORTY &>/dev/null
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groupdel -f $SHORTY &>/dev/null
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log "Removing files and directories ..."
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abort
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echo "Remove data? y/n"
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read choice
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if [ "$choice" = "y" ]
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then
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if [ -d "$DATADIR" ]
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then
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rm -r "$DATADIR"
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fi
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if [ -d "$HOMEDIR" ]
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then
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rm -r "$HOMEDIR"
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fi
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if [ -f "$configfile" ]
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then
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rm "$configfile"
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fi
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fi
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if [ -f "$checkfile" ]
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then
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rm "$checkfile"
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fi
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log "OK"
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}
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# Execute workflow
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init
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