#!/bin/bash

INITSYS=`readlink -f /proc/1/exe`
if [ "$INITSYS" != "/lib/systemd/systemd" -a "$INITSYS" != "/usr/lib/systemd/systemd" ]; then
	echo "ERROR: This chr package supports only systemd."
	exit 0
fi

# create elasticsearch user
getent group elasticsearch >/dev/null 2>&1 ||
	addgroup --system elasticsearch
getent passwd elasticsearch >/dev/null 2>&1 ||
	adduser --system --home /nonexistent --no-create-home --disabled-password --shell /bin/false --ingroup elasticsearch elasticsearch
#getent passwd elasticsearch |grep "elasticsearch user" >/dev/null 2>&1 ||
#	chfn -f "elasticsearch user" elasticsearch

echo "Checking systemd notify,log socket placeholders"
/usr/lib/3gsystools/chr_placeholder_check /chroot/elasticd/run /systemd/notify file
/usr/lib/3gsystools/chr_placeholder_check /chroot/elasticd/run /systemd/journal/dev-log file

# restarting syslog
systemctl restart rsyslog

# creating link from /dev/log to systemd log socket
if ! [ -e /chroot/elasticd/dev/log ]; then
	ln -s ../run/systemd/journal/dev-log /chroot/elasticd/dev/log
fi

echo "Checking elasticsearch data folders"
test -e /srv/elasticsearch || install -m 755 -o elasticsearch -g elasticsearch -d /srv/elasticsearch
test -e /chroot/elasticd/var/lib/elasticsearch || install -m 755 -o elasticsearch -g elasticsearch -d /chroot/elasticd/var/lib/elasticsearch


echo "Updating fstab"
/usr/local/sbin/fstab-chr

# load sysctl config
sysctl -p /etc/sysctl.d/elasticsearch-chroot.conf

# delete deprecated units
[ -h /etc/systemd/system/multi-user.target.wants/elasticsearch-chroot.service ] && rm /etc/systemd/system/multi-user.target.wants/elasticsearch-chroot.service

# activating systemd units
systemctl daemon-reload


# Enabling systemd units

SYSTEMD_UNITS="
	chr-elasticd.target
	chroot-elasticd-run-systemd-notify.mount
	chroot-elasticd-tmp.mount
	chroot-elasticd-run-systemd-journal-dev\\x2dlog.mount
	chroot-elasticd-var-lib-elasticsearch.mount
	chroot-elasticd-proc.mount
	elasticsearch-chroot.service
"

for systemd_unit in $SYSTEMD_UNITS; do

	systemctl enable "${systemd_unit}"
	if deb-systemd-helper --quiet was-enabled "${systemd_unit}"; then
		deb-systemd-helper enable "${systemd_unit}" >/dev/null || true
	else
		deb-systemd-helper update-state "${systemd_unit}" >/dev/null || true
	fi

done

exit 0