ClickHouse/debian/clickhouse-server.init
2018-03-01 23:16:03 +03:00

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#!/bin/sh
### BEGIN INIT INFO
# Provides: clickhouse-server
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Required-Start:
# Required-Stop:
# Short-Description: Yandex clickhouse-server daemon
### END INIT INFO
CLICKHOUSE_USER=clickhouse
CLICKHOUSE_GROUP=${CLICKHOUSE_USER}
SHELL=/bin/bash
PROGRAM=clickhouse-server
GENERIC_PROGRAM=clickhouse
EXTRACT_FROM_CONFIG=${GENERIC_PROGRAM}-extract-from-config
SYSCONFDIR=/etc/$PROGRAM
CLICKHOUSE_LOGDIR=/var/log/clickhouse-server
CLICKHOUSE_LOGDIR_USER=root
CLICKHOUSE_DATADIR_OLD=/opt/clickhouse
LOCALSTATEDIR=/var/lock
BINDIR=/usr/bin
CLICKHOUSE_CRONFILE=/etc/cron.d/clickhouse-server
CLICKHOUSE_CONFIG=$SYSCONFDIR/config.xml
LOCKFILE=$LOCALSTATEDIR/$PROGRAM
RETVAL=0
CLICKHOUSE_PIDDIR=/var/run/$PROGRAM
CLICKHOUSE_PIDFILE="$CLICKHOUSE_PIDDIR/$PROGRAM.pid"
# Override defaults from optional config file
test -f /etc/default/clickhouse && . /etc/default/clickhouse
# On x86_64, check for required instruction set.
if uname -mpi | grep -q 'x86_64'; then
if ! grep -q 'sse4_2' /proc/cpuinfo; then
# On KVM, cpuinfo could falsely not report SSE 4.2 support, so skip the check.
if ! grep -q 'Common KVM processor' /proc/cpuinfo; then
# Some other VMs also report wrong flags in cpuinfo.
# Tricky way to test for instruction set:
# create temporary binary and run it;
# if it get caught illegal instruction signal,
# then required instruction set is not supported really.
#
# Generated this way:
# gcc -xc -Os -static -nostdlib - <<< 'void _start() { __asm__("pcmpgtq %%xmm0, %%xmm1; mov $0x3c, %%rax; xor %%rdi, %%rdi; syscall":::"memory"); }' && strip -R .note.gnu.build-id -R .comment -R .eh_frame -s ./a.out && gzip -c -9 ./a.out | base64 -w0; echo
if ! (echo -n 'H4sICAwAW1cCA2Eub3V0AKt39XFjYmRkgAEmBjsGEI+H0QHMd4CKGyCUAMUsGJiBJDNQNUiYlQEZOKDQclB9cnD9CmCSBYqJBRxQOvBpSQobGfqIAWn8FuYnPI4fsAGyPQz/87MeZtArziguKSpJTGLQK0mtKGGgGHADMSgoYH6AhTMPNHyE0NQzYuEzYzEXFr6CBPQDANAsXKTwAQAA' | base64 -d | gzip -d > /tmp/clickhouse_test_sse42 && chmod a+x /tmp/clickhouse_test_sse42 && /tmp/clickhouse_test_sse42); then
echo 'Warning! SSE 4.2 instruction set is not supported'
#exit 3
fi
fi
fi
fi
SUPPORTED_COMMANDS="{start|stop|status|restart|forcestop|forcerestart|reload|condstart|condstop|condrestart|condreload|initdb}"
is_supported_command()
{
echo "$SUPPORTED_COMMANDS" | grep -E "(\{|\|)$1(\||})" &> /dev/null
}
is_running()
{
[ -r "$CLICKHOUSE_PIDFILE" ] && pgrep -s $(cat "$CLICKHOUSE_PIDFILE") 1> /dev/null 2> /dev/null
}
wait_for_done()
{
while is_running; do
sleep 1
done
}
die()
{
echo $1 >&2
exit 1
}
# Check that configuration file is Ok.
check_config()
{
if [ -x "$BINDIR/$EXTRACT_FROM_CONFIG" ]; then
su -s $SHELL ${CLICKHOUSE_USER} -c "$BINDIR/$EXTRACT_FROM_CONFIG --config-file=\"$CLICKHOUSE_CONFIG\" --key=path" >/dev/null || die "Configuration file ${CLICKHOUSE_CONFIG} doesn't parse successfully. Won't restart server. You may use forcerestart if you are sure.";
fi
}
initdb()
{
if [ -d ${SYSCONFDIR} ]; then
su -s /bin/sh ${CLICKHOUSE_USER} -c "test -w ${SYSCONFDIR}" || chown ${CLICKHOUSE_USER}:${CLICKHOUSE_GROUP} ${SYSCONFDIR}
fi
if [ -x "$BINDIR/$EXTRACT_FROM_CONFIG" ]; then
CLICKHOUSE_DATADIR_FROM_CONFIG=$(su -s $SHELL ${CLICKHOUSE_USER} -c "$BINDIR/$EXTRACT_FROM_CONFIG --config-file=\"$CLICKHOUSE_CONFIG\" --key=path")
if [ "(" "$?" -ne "0" ")" -o "(" -z "${CLICKHOUSE_DATADIR_FROM_CONFIG}" ")" ]; then
die "Cannot obtain value of path from config file: ${CLICKHOUSE_CONFIG}";
fi
echo "Path to data directory in ${CLICKHOUSE_CONFIG}: ${CLICKHOUSE_DATADIR_FROM_CONFIG}"
else
CLICKHOUSE_DATADIR_FROM_CONFIG="/var/lib/clickhouse"
fi
if ! getent group ${CLICKHOUSE_USER} >/dev/null; then
echo "Can't chown to non-existing user ${CLICKHOUSE_USER}"
return
fi
if ! getent passwd ${CLICKHOUSE_GROUP} >/dev/null; then
echo "Can't chown to non-existing group ${CLICKHOUSE_GROUP}"
return
fi
if ! $(su -s $SHELL ${CLICKHOUSE_USER} -c "test -r ${CLICKHOUSE_CONFIG}"); then
echo "Warning! clickhouse config [${CLICKHOUSE_CONFIG}] not readable by user [${CLICKHOUSE_USER}]"
fi
if ! $(su -s $SHELL ${CLICKHOUSE_USER} -c "test -O \"${CLICKHOUSE_DATADIR_FROM_CONFIG}\" && test -G \"${CLICKHOUSE_DATADIR_FROM_CONFIG}\""); then
if [ $(dirname "${CLICKHOUSE_DATADIR_FROM_CONFIG}") == "/" ]; then
echo "Directory ${CLICKHOUSE_DATADIR_FROM_CONFIG} seems too dangerous to chown."
else
if [ ! -e "${CLICKHOUSE_DATADIR_FROM_CONFIG}" ]; then
echo "Creating directory ${CLICKHOUSE_DATADIR_FROM_CONFIG}"
mkdir -p "${CLICKHOUSE_DATADIR_FROM_CONFIG}"
fi
echo "Changing owner of [${CLICKHOUSE_DATADIR_FROM_CONFIG}] to [${CLICKHOUSE_USER}:${CLICKHOUSE_GROUP}]"
chown -R ${CLICKHOUSE_USER}:${CLICKHOUSE_GROUP} "${CLICKHOUSE_DATADIR_FROM_CONFIG}"
fi
fi
if ! $(su -s $SHELL ${CLICKHOUSE_USER} -c "test -w ${CLICKHOUSE_LOGDIR}"); then
echo "Changing owner of [${CLICKHOUSE_LOGDIR}/*] to [${CLICKHOUSE_USER}:${CLICKHOUSE_GROUP}]"
chown -R ${CLICKHOUSE_USER}:${CLICKHOUSE_GROUP} ${CLICKHOUSE_LOGDIR}/*
echo "Changing owner of [${CLICKHOUSE_LOGDIR}] to [${CLICKHOUSE_LOGDIR_USER}:${CLICKHOUSE_GROUP}]"
chown ${CLICKHOUSE_LOGDIR_USER}:${CLICKHOUSE_GROUP} ${CLICKHOUSE_LOGDIR}
fi
}
start()
{
[ -x $BINDIR/$PROGRAM ] || exit 0
local EXIT_STATUS
EXIT_STATUS=0
echo -n "Start $PROGRAM service: "
ulimit -n 262144
if is_running; then
echo -n "already running "
EXIT_STATUS=1
else
mkdir -p $CLICKHOUSE_PIDDIR
chown -R $CLICKHOUSE_USER:$CLICKHOUSE_GROUP $CLICKHOUSE_PIDDIR
initdb
if ! is_running; then
# Lock should not be held while running child process, so we release the lock. Note: obviously, there is race condition.
# But clickhouse-server has protection from simultaneous runs with same data directory.
su -s $SHELL ${CLICKHOUSE_USER} -c "flock -u 9; exec -a \"$PROGRAM\" \"$BINDIR/$PROGRAM\" --daemon --pid-file=\"$CLICKHOUSE_PIDFILE\" --config-file=\"$CLICKHOUSE_CONFIG\""
EXIT_STATUS=$?
if [ $EXIT_STATUS -ne 0 ]; then
break
fi
fi
fi
if [ $EXIT_STATUS -eq 0 ]; then
echo "DONE"
else
echo "FAILED"
fi
return $EXIT_STATUS
}
stop()
{
local EXIT_STATUS
EXIT_STATUS=0
if [ -f $CLICKHOUSE_PIDFILE ]; then
echo -n "Stop $PROGRAM service: "
kill -TERM $(cat "$CLICKHOUSE_PIDFILE")
wait_for_done
echo "DONE"
fi
return $EXIT_STATUS
}
restart()
{
check_config
stop
start
}
forcestop()
{
local EXIT_STATUS
EXIT_STATUS=0
echo -n "Stop forcefully $PROGRAM service: "
kill -KILL $(cat "$CLICKHOUSE_PIDFILE")
wait_for_done
echo "DONE"
return $EXIT_STATUS
}
forcerestart()
{
forcestop
start
}
use_cron()
{
# 1. running systemd
if [ -x "/bin/systemctl" ] && [ -f /etc/systemd/system/clickhouse-server.service ] && [ -d /run/systemd/system ]; then
return 1
fi
# 2. disabled by config
if [ -z "$CLICKHOUSE_CRONFILE" ]; then
return 2
fi
return 0
}
enable_cron()
{
use_cron && sed -i 's/^#*//' "$CLICKHOUSE_CRONFILE"
}
disable_cron()
{
use_cron && sed -i 's/^#*/#/' "$CLICKHOUSE_CRONFILE"
}
is_cron_disabled()
{
use_cron || return 0
# Assumes that either no lines are commented or all lines are commented.
# Also please note, that currently cron file for ClickHouse has only one line (but some time ago there was more).
grep -q -E '^#' "$CLICKHOUSE_CRONFILE";
}
main()
{
# See how we were called.
EXIT_STATUS=0
case "$1" in
start)
start && enable_cron
;;
stop)
disable_cron && stop
;;
restart)
restart && enable_cron
;;
forcestop)
disable_cron && forcestop
;;
forcerestart)
forcerestart && enable_cron
;;
reload)
restart
;;
condstart)
is_running || start
;;
condstop)
is_running && stop
;;
condrestart)
is_running && restart
;;
condreload)
is_running && restart
;;
initdb)
initdb
;;
enable_cron)
enable_cron
;;
disable_cron)
disable_cron
;;
*)
echo "Usage: $0 $SUPPORTED_COMMANDS"
exit 2
;;
esac
exit $EXIT_STATUS
}
status()
{
if is_running; then
echo "$PROGRAM service is running"
else
if is_cron_disabled; then
echo "$PROGRAM service is stopped";
else
echo "$PROGRAM: process unexpectedly terminated"
fi
fi
}
# Running commands without need of locking
case "$1" in
status)
status
exit 0
;;
esac
(
if flock -n 9; then
main "$@"
else
echo "Init script is already running" && exit 1
fi
) 9> $LOCKFILE