netdata-installer.sh

#!/bin/bash

LC_ALL=C

# you can set CFLAGS before running installer
CFLAGS="${CFLAGS--O3}"

# keep a log of this command
printf "\n# " >>netdata-installer.log
date >>netdata-installer.log
printf "CFLAGS=\"%s\" " "${CFLAGS}" >>netdata-installer.log
printf "%q " "$0" "${@}" >>netdata-installer.log
printf "\n" >>netdata-installer.log

ME="$0"
DONOTSTART=0
DONOTWAIT=0
NETDATA_PREFIX=
ZLIB_IS_HERE=0

usage() {
	cat <<USAGE

${ME} <installer options>

Valid <installer options> are:

   --install /PATH/TO/INSTALL

        If your give: --install /opt
        netdata will be installed in /opt/netdata

   --dont-start-it

        Do not (re)start netdata.
        Just install it.

   --dont-wait

        Do not wait for the user to press ENTER.
        Start immediately building it.

   --zlib-is-really-here

        If you get errors about missing zlib,
        but you know it is available,
        you have a broken pkg-config.
        Use this option to allow it continue
        without checking pkg-config.

Netdata will by default be compiled with gcc optimization -O3
If you need to pass different CFLAGS, use something like this:

  CFLAGS="<gcc options>" $ME <installer options>

For the installer to complete successfully, you will need
these packages installed:

   gcc make autoconf automake pkg-config zlib1g-dev

For the plugins, you will at least need:

   curl node

USAGE
}

while [ ! -z "${1}" ]
do
	if [ "$1" = "--install" ]
		then
		NETDATA_PREFIX="${2}/netdata"
		shift 2
	elif [ "$1" = "--zlib-is-really-here" ]
		then
		ZLIB_IS_HERE=1
		shift 1
	elif [ "$1" = "--dont-start-it" ]
		then
		DONOTSTART=1
		shift 1
	elif [ "$1" = "--dont-wait" ]
		then
		DONOTWAIT=1
		shift 1
	elif [ "$1" = "--help" -o "$1" = "-h" ]
		then
		usage
		exit 1
	else
		echo >&2
		echo >&2 "ERROR:"
		echo >&2 "I cannot understand option '$1'."
		usage
		exit 1
	fi
done

cat <<BANNER

Welcome to netdata!
Nice to see you are giving it a try!

You are about to build and install netdata to your system.

It will be installed at these locations:

  - the daemon    at ${NETDATA_PREFIX}/usr/sbin/netdata
  - config files  at ${NETDATA_PREFIX}/etc/netdata
  - web files     at ${NETDATA_PREFIX}/usr/share/netdata
  - plugins       at ${NETDATA_PREFIX}/usr/libexec/netdata
  - cache files   at ${NETDATA_PREFIX}/var/cache/netdata
  - log files     at ${NETDATA_PREFIX}/var/log/netdata

This installer allows you to change the installation path.
Press Control-C and run the same command with --help for help.

BANNER

if [ ! "${UID}" = 0 -o "$1" = "-h" -o "$1" = "--help" ]
	then
	echo >&2
	echo >&2 "You have to run netdata as root."
	echo >&2 "The netdata daemon will drop priviliges"
	echo >&2 "but you have to start it as root."
	echo >&2
	exit 1
fi

have_autotools=
if [ "$(type autoreconf 2> /dev/null)" ]
then
	autoconf_maj_min() {
		local maj min IFS=.-

		maj=$1
		min=$2

		set -- $(autoreconf -V | sed -ne '1s/.* \([^ ]*\)$/\1/p')
		eval $maj=\$1 $min=\$2
	}
	autoconf_maj_min AMAJ AMIN

	if [ "$AMAJ" -gt 2 ]
	then
		have_autotools=Y
	elif [ "$AMAJ" -eq 2 -a "$AMIN" -ge 60 ]
	then
		have_autotools=Y
	else
		echo "Found autotools $AMAJ.$AMIN"
	fi
else
	echo "No autotools found"
fi

if [ ! "$have_autotools" ]
then
	if [ -f configure ]
	then
		echo "Will skip autoreconf step"
	else
		cat <<-"EOF"

	Sorry, you do not seem to have autotools 2.60 or later, which is
	required to build from the git sources of netdata.

	You can either install a suitable version of autotools and automake
	or download a netdata package which does not have these dependencies.

	Source packages where autotools have already been run are available
	here:
	       https://firehol.org/download/netdata/

	The unsigned/master folder tracks the head of the git tree and released
	packages are also available.
	EOF
		exit 1
	fi
fi

if [ ${DONOTWAIT} -eq 0 ]
	then
	if [ ! -z "${NETDATA_PREFIX}" ]
		then
		read -p "Press ENTER to build and install netdata to '${NETDATA_PREFIX}' > "
	else
		read -p "Press ENTER to build and install netdata to your system > "
	fi
fi

# reload the profile
[ -f /etc/profile ] && . /etc/profile

build_error() {
	cat <<EOF

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Sorry! NetData failed to build...

You many need to check these:

1. The package zlib1g-dev has to be installed.

2. You need basic build tools installed, like:

   gcc make autoconf automake pkg-config

   Autoconf version 2.60 or higher is required

3. If your system cannot find ZLIB, although it is installed
   run me with the option:  --zlib-is-really-here

If you still cannot get it to build, ask for help at github:

   https://github.com/firehol/netdata/issues


EOF
	trap - EXIT
	exit 1
}

run() {
	printf >&2 ":-----------------------------------------------------------------------------\n"
	printf >&2 "Running command:\n"
	printf >&2 "\n"
	printf >&2 "%q " "${@}"
	printf >&2 "\n"
	printf >&2 "\n"

	"${@}"
}

if [ ${ZLIB_IS_HERE} -eq 1 ]
	then
	shift
	echo >&2 "ok, assuming zlib is really installed."
	export ZLIB_CFLAGS=" "
	export ZLIB_LIBS="-lz"
fi

trap build_error EXIT

if [ "$have_autotools" ]
then
	echo >&2 "Running ./autogen.sh ..."
	run ./autogen.sh || exit 1
fi

echo >&2 "Running ./configure ..."
run ./configure \
	--prefix="${NETDATA_PREFIX}/usr" \
	--sysconfdir="${NETDATA_PREFIX}/etc" \
	--localstatedir="${NETDATA_PREFIX}/var" \
	--with-zlib --with-math --with-user=netdata \
	CFLAGS="${CFLAGS}" || exit 1

# remove the build_error hook
trap - EXIT

if [ -f src/netdata ]
	then
	echo >&2 "Cleaning a possibly old compilation ..."
	run make clean
fi

echo >&2 "Compiling netdata ..."
run make || exit 1

echo >&2 "Installing netdata ..."
run make install || exit 1

echo >&2 "Adding netdata user group ..."
getent group netdata > /dev/null || run groupadd -r netdata

echo >&2 "Adding netdata user account ..."
getent passwd netdata > /dev/null || run useradd -r -g netdata -c netdata -s /sbin/nologin -d / netdata


# -----------------------------------------------------------------------------
# load options from the configuration file

# create an empty config if it does not exist
[ ! -f "${NETDATA_PREFIX}/etc/netdata/netdata.conf" ] && touch "${NETDATA_PREFIX}/etc/netdata/netdata.conf"

# function to extract values from the config file
config_option() {
	local key="${1}" value="${2}" line=

	if [ -s "${NETDATA_PREFIX}/etc/netdata/netdata.conf" ]
		then
		line="$( grep "^[[:space:]]*${key}[[:space:]]*=[[:space:]]*" "${NETDATA_PREFIX}/etc/netdata/netdata.conf" | head -n 1 )"
		[ ! -z "${line}" ] && value="$( echo "${line}" | cut -d '=' -f 2 | sed -e "s/^[[:space:]]\+//g" -e "s/[[:space:]]\+$//g" )"
	fi

	echo "${value}"
}

# user
defuser="netdata"
[ ! "${UID}" = "0" ] && defuser="${USER}"
NETDATA_USER="$( config_option "run as user" "${defuser}" )"

# debug flags
defdebug=0
NETDATA_DEBUG="$( config_option "debug flags" ${defdebug} )"

# port
defport=19999
NETDATA_PORT="$( config_option "port" ${defport} )"

# directories
NETDATA_CACHE_DIR="$( config_option "cache directory" "${NETDATA_PREFIX}/var/cache/netdata" )"
NETDATA_WEB_DIR="$( config_option "web files directory" "${NETDATA_PREFIX}/usr/share/netdata/web" )"
NETDATA_LOG_DIR="$( config_option "log directory" "${NETDATA_PREFIX}/var/log/netdata" )"
NETDATA_CONF_DIR="$( config_option "config directory" "${NETDATA_PREFIX}/etc/netdata" )"


# -----------------------------------------------------------------------------
# prepare the directories

echo >&2 "Fixing directory permissions for user ${NETDATA_USER}..."
for x in "${NETDATA_WEB_DIR}" "${NETDATA_CONF_DIR}" "${NETDATA_CACHE_DIR}" "${NETDATA_LOG_DIR}"
do
	if [ ! -d "${x}" ]
		then
		echo >&2 "Creating directory '${x}'"
		run mkdir -p "${x}" || exit 1
	fi
	run chown -R "${NETDATA_USER}:${NETDATA_USER}" "${x}" || echo >&2 "WARNING: Cannot change the ownership of the files in directory ${x} to ${NETDATA_USER}..."
	run chmod 0775 "${x}" || echo >&2 "WARNING: Cannot change the permissions of the directory ${x} to 0755..."
done

# fix apps.plugin to be setuid to root
run chown root "${NETDATA_PREFIX}/usr/libexec/netdata/plugins.d/apps.plugin"
run chmod 4755 "${NETDATA_PREFIX}/usr/libexec/netdata/plugins.d/apps.plugin"


# -----------------------------------------------------------------------------
# check if we can re-start netdata

if [ ${DONOTSTART} -eq 1 ]
	then
	if [ ! -s "${NETDATA_PREFIX}/etc/netdata/netdata.conf" ]
		then
		echo >&2 "Generating empty config file in: ${NETDATA_PREFIX}/etc/netdata/netdata.conf"
		echo "# Get config from http://127.0.0.1:${NETDATA_PORT}/netdata.conf" >"${NETDATA_PREFIX}/etc/netdata/netdata.conf"
		chown "${NETDATA_USER}" "${NETDATA_PREFIX}/etc/netdata/netdata.conf"
		chmod 0664 "${NETDATA_PREFIX}/etc/netdata/netdata.conf"
	fi
	echo >&2 "OK. It is now installed and ready."
	exit 0
fi

# -----------------------------------------------------------------------------
# stop a running netdata

isnetdata() {
	[ -z "$1" -o ! -f "/proc/$1/stat" ] && return 1
	[ "$(cat "/proc/$1/stat" | cut -d '(' -f 2 | cut -d ')' -f 1)" = "netdata" ] && return 0
	return 1
}


printf >&2 "Stopping a (possibly) running netdata..."
ret=0
count=0
while [ $ret -eq 0 ]
do
	if [ $count -gt 15 ]
		then
		echo >&2 "Cannot stop the running netdata."
		exit 1
	fi

	count=$((count + 1))

	pid=$(cat /var/run/netdata.pid 2>/dev/null)
	# backwards compatibility
	[ -z "${pid}" ] && pid=$(cat /var/run/netdata/netdata.pid 2>/dev/null)
	
	isnetdata $pid || pid=
	if [ ! -z "${pid}" ]
		then
		run kill $pid 2>/dev/null
		ret=$?
	else
		run killall netdata 2>/dev/null
		ret=$?
	fi

	test $ret -eq 0 && printf >&2 "." && sleep 2
done
echo >&2


# -----------------------------------------------------------------------------
# run netdata

echo >&2 "Starting netdata..."
run ${NETDATA_PREFIX}/usr/sbin/netdata -pidfile /var/run/netdata.pid "${@}"

if [ $? -ne 0 ]
	then
	echo >&2
	echo >&2 "SORRY! FAILED TO START NETDATA!"
	exit 1
else
	echo >&2 "OK. NetData Started!"
fi


# -----------------------------------------------------------------------------
# save a config file, if it is not already there

if [ ! -s "${NETDATA_PREFIX}/etc/netdata/netdata.conf" ]
	then
	echo >&2 "Downloading default configuration from netdata..."
	sleep 5

	# remove a possibly obsolete download
	[ -f "${NETDATA_PREFIX}/etc/netdata/netdata.conf.new" ] && rm "${NETDATA_PREFIX}/etc/netdata/netdata.conf.new"

	# disable a proxy to get data from the local netdata
	export http_proxy=
	export https_proxy=

	# try wget
	wget 2>/dev/null -O "${NETDATA_PREFIX}/etc/netdata/netdata.conf.new" "http://localhost:${NETDATA_PORT}/netdata.conf"
	ret=$?

	# try curl
	if [ $ret -ne 0 -o ! -s "${NETDATA_PREFIX}/etc/netdata/netdata.conf.new" ]
		then
		curl -s -o "${NETDATA_PREFIX}/etc/netdata/netdata.conf.new" "http://localhost:${NETDATA_PORT}/netdata.conf"
		ret=$?
	fi

	if [ $ret -eq 0 -a -s "${NETDATA_PREFIX}/etc/netdata/netdata.conf.new" ]
		then
		mv "${NETDATA_PREFIX}/etc/netdata/netdata.conf.new" "${NETDATA_PREFIX}/etc/netdata/netdata.conf"
		echo >&2 "New configuration saved for you to edit at ${NETDATA_PREFIX}/etc/netdata/netdata.conf"

		chown "${NETDATA_USER}" "${NETDATA_PREFIX}/etc/netdata/netdata.conf"
		chmod 0664 "${NETDATA_PREFIX}/etc/netdata/netdata.conf"
	else
		echo >&2 "Cannnot download configuration from netdata daemon using url 'http://localhost:${NETDATA_PORT}/netdata.conf'"
		[ -f "${NETDATA_PREFIX}/etc/netdata/netdata.conf.new" ] && rm "${NETDATA_PREFIX}/etc/netdata/netdata.conf.new"
	fi
fi

# -----------------------------------------------------------------------------

cat <<END


-------------------------------------------------------------------------------

ok. NetData is installed and is running.

Hit http://localhost:${NETDATA_PORT}/ from your browser.

To stop netdata, just kill it, with:

  killall netdata

To start it, just run it:

  ${NETDATA_PREFIX}/usr/sbin/netdata

Enjoy!

END

# -----------------------------------------------------------------------------
# Check for KSM

ksm_is_available_but_disabled() {
	cat <<KSM1

INFORMATION:

I see you have kernel memory de-duper (called Kernel Same-page Merging,
or KSM) available, but it is not currently enabled.

To enable it run:

echo 1 >/sys/kernel/mm/ksm/run
echo 1000 >/sys/kernel/mm/ksm/sleep_millisecs

If you enable it, you will save 20-60% of netdata memory.

KSM1
}

ksm_is_not_available() {
	cat <<KSM2

INFORMATION:

I see you do not have kernel memory de-duper (called Kernel Same-page
Merging, or KSM) available.

To enable it, you need a kernel built with CONFIG_KSM=y

If you can have it, you will save 20-60% of netdata memory.

KSM2
}

if [ -f "/sys/kernel/mm/ksm/run" ]
	then
	if [ $(cat "/sys/kernel/mm/ksm/run") != "1" ]
		then
		ksm_is_available_but_disabled
	fi
else
	ksm_is_not_available
fi

# -----------------------------------------------------------------------------
# Check for version.txt

if [ ! -s web/version.txt ]
	then
cat <<VERMSG

VERSION UPDATE CHECK:

The way you downloaded netdata, we cannot find its version.
This means the Update check on the dashboard, will not work.

If you want to have version update check, please re-install it
following the procedure in:

https://github.com/firehol/netdata/wiki/Installation


VERMSG
fi

# -----------------------------------------------------------------------------
# Keep un-install info

cat >netdata-uninstaller.sh <<UNINSTALL
#!/bin/bash

# this script will uninstall netdata

if [ "\$1" != "--force" ]
	then
	echo >&2 "This script will REMOVE netdata from your system."
	echo >&2 "Run it again with --force to do it."
	exit 1
fi

echo >&2 "Stopping a possibly running netdata..."
killall netdata
sleep 2

deletedir() {
	if [ ! -z "\$1" -a -d "\$1" ]
		then
		echo
		echo "Deleting directory '\$1' ..."
		rm -I -R "\$1"
	fi
}

if [ ! -z "${NETDATA_PREFIX}" -a -d "${NETDATA_PREFIX}" ]
	then
	# installation prefix was given

	deletedir "${NETDATA_PREFIX}"

else
	# installation prefix was NOT given

	if [ -f "${NETDATA_PREFIX}/usr/sbin/netdata" ]
		then
		echo "Deleting ${NETDATA_PREFIX}/usr/sbin/netdata ..."
		rm -i "${NETDATA_PREFIX}/usr/sbin/netdata"
	fi

	deletedir "${NETDATA_PREFIX}/etc/netdata"
	deletedir "${NETDATA_PREFIX}/usr/share/netdata"
	deletedir "${NETDATA_PREFIX}/usr/libexec/netdata"
	deletedir "${NETDATA_PREFIX}/var/cache/netdata"
	deletedir "${NETDATA_PREFIX}/var/log/netdata"
fi

getent passwd netdata > /dev/null
if [ $? -eq 0 ]
	then
	echo
	echo "You may also want to remove the user netdata"
	echo "by running:"
	echo "   userdel netdata"
fi

getent group netdata > /dev/null
if [ $? -eq 0 ]
	then
	echo
	echo "You may also want to remove the group netdata"
	echo "by running:"
	echo "   groupdel netdata"
fi

UNINSTALL
chmod 750 netdata-uninstaller.sh

echo >&2 "Uninstall script generated: ./netdata-uninstaller.sh"