energylink/packaging/deb/control/postinst

#!/bin/sh

set -e

[ -f /etc/default/grafana ] && . /etc/default/grafana

startGrafana() {
    if [ -x /bin/systemctl ] ; then
        /bin/systemctl daemon-reload
        /bin/systemctl start grafana.service
	elif [ -x "/etc/init.d/grafana" ]; then
		if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
			invoke-rc.d grafana start || true
		else
			/etc/init.d/grafana start || true
		fi
	fi
}

case "$1" in
	configure)
	[ -z "$GRAFANA_USER" ] && GRAFANA_USER="grafana"
	[ -z "$GRAFANA_GROUP" ] && GRAFANA_GROUP="grafana"
	if ! getent group "$GRAFANA_GROUP" > /dev/null 2>&1 ; then
	    addgroup --system "$GRAFANA_GROUP" --quiet
	fi
	if ! id $GRAFANA_USER > /dev/null 2>&1 ; then
	    adduser --system --home /usr/share/grafana --no-create-home \
		--ingroup "$GRAFANA_GROUP" --disabled-password --shell /bin/false \
		"$GRAFANA_USER"
	fi

	# Set user permissions on /var/log/grafana, /opt/grafana/data
	mkdir -p /var/log/grafana /opt/grafana/data
	chown -R $GRAFANA_USER:$GRAFANA_GROUP /var/log/grafana /opt/grafana/data
	chmod 755 /var/log/grafana /opt/grafana/data

	# configuration files should not be modifiable by elasticsearch user, as this can be a security issue
	chown -Rh root:root /etc/grafana/*
	chmod 755 /etc/grafana
	find /etc/grafana -type f -exec chmod 644 {} ';'
	find /etc/grafana -type d -exec chmod 755 {} ';'

	# if $2 is set, this is an upgrade
	if ( [ -n $2 ] && [ "$RESTART_ON_UPGRADE" = "true" ] ) ; then
		startGrafana
	# this is a fresh installation
	elif [ -z $2 ] ; then
        if [ -x /bin/systemctl ] ; then
            echo "### NOT starting on installation, please execute the following statements to configure elasticsearch to start automatically using systemd"
            echo " sudo /bin/systemctl daemon-reload"
            echo " sudo /bin/systemctl enable grafana.service"
            echo "### You can start grafana by executing"
            echo " sudo /bin/systemctl start grafana.service"

        elif [ -x /usr/sbin/update-rc.d ] ; then
            echo "### NOT starting grafana by default on bootup, please execute"
            echo " sudo update-rc.d grafana defaults 95 10"
            echo "### In order to start grafana, execute"
            echo " sudo /etc/init.d/grafana start"
        fi
	fi
	;;
esac