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#!/usr/bin/env bash
#shellcheck disable=SC2164
# this script will uninstall netdata
# Variables needed by script:
# - PATH
# - CFLAGS
# - NETDATA_CONFIGURE_OPTIONS
# - REINSTALL_COMMAND
# - NETDATA_TARBALL_URL
# - NETDATA_TARBALL_CHECKSUM_URL
# - NETDATA_TARBALL_CHECKSUM
info() {
echo >&3 "$(date) : INFO: " "${@}"
}
error() {
echo >&3 "$(date) : ERROR: " "${@}"
}
safe_sha256sum() {
# Within the contexct of the installer, we only use -c option that is common between the two commands
# We will have to reconsider if we start non-common options
if command -v sha256sum >/dev/null 2>&1; then
sha256sum $@
elif command -v shasum >/dev/null 2>&1; then
shasum -a 256 $@
else
fatal "I could not find a suitable checksum binary to use"
fi
}
# this is what we will do if it fails (head-less only)
fatal() {
error "FAILED TO UPDATE NETDATA : ${1}"
if [ -n "${logfile}" ]; then
cat >&2 "${logfile}"
rm "${logfile}"
fi
exit 1
}
create_tmp_directory() {
# Check if tmp is mounted as noexec
if grep -Eq '^[^ ]+ /tmp [^ ]+ ([^ ]*,)?noexec[, ]' /proc/mounts; then
pattern="$(pwd)/netdata-updater-XXXXXX"
else
pattern="/tmp/netdata-updater-XXXXXX"
fi
mktemp -d "$pattern"
}
download() {
url="${1}"
dest="${2}"
if command -v curl >/dev/null 2>&1; then
curl -sSL --connect-timeout 10 --retry 3 "${url}" >"${dest}" || fatal "Cannot download ${url}"
elif command -v wget >/dev/null 2>&1; then
wget -T 15 -O - "${url}" >"${dest}" || fatal "Cannot download ${url}"
else
fatal "I need curl or wget to proceed, but neither is available on this system."
fi
}
set_tarball_urls() {
if [ ! -z "${NETDATA_LOCAL_TARBAL_OVERRIDE}" ]; then
info "Not fetching remote tarballs, local override was given"
return
fi
if [ "$1" = "stable" ]; then
local latest
# Simple version
# latest="$(curl -sSL https://api.github.com/repos/netdata/netdata/releases/latest | grep tag_name | cut -d'"' -f4)"
latest="$(download "https://api.github.com/repos/netdata/netdata/releases/latest" /dev/stdout | grep tag_name | cut -d'"' -f4)"
export NETDATA_TARBALL_URL="https://github.com/netdata/netdata/releases/download/$latest/netdata-$latest.tar.gz"
export NETDATA_TARBALL_CHECKSUM_URL="https://github.com/netdata/netdata/releases/download/$latest/sha256sums.txt"
else
export NETDATA_TARBALL_URL="https://storage.googleapis.com/netdata-nightlies/netdata-latest.tar.gz"
export NETDATA_TARBALL_CHECKSUM_URL="https://storage.googleapis.com/netdata-nightlies/sha256sums.txt"
fi
}
update() {
[ -z "${logfile}" ] && info "Running on a terminal - (this script also supports running headless from crontab)"
RUN_INSTALLER=0
tmpdir=$(create_tmp_directory)
cd "$tmpdir"
if [ -z "${NETDATA_LOCAL_TARBAL_OVERRIDE}" ]; then
download "${NETDATA_TARBALL_CHECKSUM_URL}" "${tmpdir}/sha256sum.txt" >&3 2>&3
if [[ -n "${NETDATA_TARBALL_CHECKSUM}" ]] && grep "${NETDATA_TARBALL_CHECKSUM}" sha256sum.txt >&3 2>&3; then
info "Newest version is already installed"
else
download "${NETDATA_TARBALL_URL}" "${tmpdir}/netdata-latest.tar.gz"
if ! grep netdata-latest.tar.gz sha256sum.txt | safe_sha256sum -c - >&3 2>&3; then
fatal "Tarball checksum validation failed. Stopping netdata upgrade and leaving tarball in ${tmpdir}"
fi
NEW_CHECKSUM="$(safe_sha256sum netdata-latest.tar.gz 2>/dev/null| cut -d' ' -f1)"
tar -xf netdata-latest.tar.gz >&3 2>&3
rm netdata-latest.tar.gz >&3 2>&3
cd netdata-*
RUN_INSTALLER=1
fi
else
info "!!Local tarball override detected!! - Entering directory ${NETDATA_LOCAL_TARBAL_OVERRIDE} for installation, not downloading anything"
RUN_INSTALLER=1
cd ${NETDATA_LOCAL_TARBAL_OVERRIDE}
fi
# We got the sources, run the update now
if [ ${RUN_INSTALLER} -eq 1 ]; then
# signal netdata to start saving its database
# this is handy if your database is big
pids=$(pidof netdata)
do_not_start=
if [ -n "${pids}" ]; then
#shellcheck disable=SC2086
kill -USR1 ${pids}
else
# netdata is currently not running, so do not start it after updating
do_not_start="--dont-start-it"
fi
info "Re-installing netdata..."
eval "${REINSTALL_COMMAND} --dont-wait ${do_not_start}" >&3 2>&3 || fatal "FAILED TO COMPILE/INSTALL NETDATA"
sed -i '/NETDATA_TARBALL/d' "${ENVIRONMENT_FILE}"
cat <<EOF >>"${ENVIRONMENT_FILE}"
NETDATA_TARBALL_CHECKSUM="$NEW_CHECKSUM"
EOF
fi
rm -rf "${tmpdir}" >&3 2>&3
[ -n "${logfile}" ] && rm "${logfile}" && logfile=
return
}
# Usually stored in /etc/netdata/.environment
: "${ENVIRONMENT_FILE:=THIS_SHOULD_BE_REPLACED_BY_INSTALLER_SCRIPT}"
# shellcheck source=/dev/null
source "${ENVIRONMENT_FILE}" || exit 1
if [ "${INSTALL_UID}" != "$(id -u)" ]; then
fatal "You are running this script as user with uid $(id -u). We recommend to run this script as root (user with uid 0)"
fi
logfile=
if [ -t 2 ]; then
# we are running on a terminal
# open fd 3 and send it to stderr
exec 3>&2
else
# we are headless
# create a temporary file for the log
logfile=$(mktemp ${logfile}/netdata-updater.log.XXXXXX)
# open fd 3 and send it to logfile
exec 3>"${logfile}"
fi
set_tarball_urls "${RELEASE_CHANNEL}"
# the installer updates this script - so we run and exit in a single line
update && exit 0
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