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authorDaniel Baumann <daniel.baumann@progress-linux.org>2022-04-14 18:12:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2022-04-14 18:12:14 +0000
commitbb50acdcb8073654ea667b8c0272e335bd43f844 (patch)
tree1e00c8a29871426f8182658928dcb62e42d57ce8 /backends/nc-backend.sh
parentReleasing debian version 1.33.1-1. (diff)
downloadnetdata-bb50acdcb8073654ea667b8c0272e335bd43f844.tar.xz
netdata-bb50acdcb8073654ea667b8c0272e335bd43f844.zip
Merging upstream version 1.34.0.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'backends/nc-backend.sh')
-rwxr-xr-xbackends/nc-backend.sh158
1 files changed, 0 insertions, 158 deletions
diff --git a/backends/nc-backend.sh b/backends/nc-backend.sh
deleted file mode 100755
index 65704b98f..000000000
--- a/backends/nc-backend.sh
+++ /dev/null
@@ -1,158 +0,0 @@
-#!/usr/bin/env bash
-
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# This is a simple backend database proxy, written in BASH, using the nc command.
-# Run the script without any parameters for help.
-
-MODE="${1}"
-MY_PORT="${2}"
-BACKEND_HOST="${3}"
-BACKEND_PORT="${4}"
-FILE="${NETDATA_NC_BACKEND_DIR-/tmp}/netdata-nc-backend-${MY_PORT}"
-
-log() {
- logger --stderr --id=$$ --tag "netdata-nc-backend" "${*}"
-}
-
-mync() {
- local ret
-
- log "Running: nc ${*}"
- nc "${@}"
- ret=$?
-
- log "nc stopped with return code ${ret}."
-
- return ${ret}
-}
-
-listen_save_replay_forever() {
- local file="${1}" port="${2}" real_backend_host="${3}" real_backend_port="${4}" ret delay=1 started ended
-
- while true
- do
- log "Starting nc to listen on port ${port} and save metrics to ${file}"
-
- started=$(date +%s)
- mync -l -p "${port}" | tee -a -p --output-error=exit "${file}"
- ended=$(date +%s)
-
- if [ -s "${file}" ]
- then
- if [ ! -z "${real_backend_host}" ] && [ ! -z "${real_backend_port}" ]
- then
- log "Attempting to send the metrics to the real backend at ${real_backend_host}:${real_backend_port}"
-
- mync "${real_backend_host}" "${real_backend_port}" <"${file}"
- ret=$?
-
- if [ ${ret} -eq 0 ]
- then
- log "Successfully sent the metrics to ${real_backend_host}:${real_backend_port}"
- mv "${file}" "${file}.old"
- touch "${file}"
- else
- log "Failed to send the metrics to ${real_backend_host}:${real_backend_port} (nc returned ${ret}) - appending more data to ${file}"
- fi
- else
- log "No backend configured - appending more data to ${file}"
- fi
- fi
-
- # prevent a CPU hungry infinite loop
- # if nc cannot listen to port
- if [ $((ended - started)) -lt 5 ]
- then
- log "nc has been stopped too fast."
- delay=30
- else
- delay=1
- fi
-
- log "Waiting ${delay} seconds before listening again for data."
- sleep ${delay}
- done
-}
-
-if [ "${MODE}" = "start" ]
- then
-
- # start the listener, in exclusive mode
- # only one can use the same file/port at a time
- {
- flock -n 9
- # shellcheck disable=SC2181
- if [ $? -ne 0 ]
- then
- log "Cannot get exclusive lock on file ${FILE}.lock - Am I running multiple times?"
- exit 2
- fi
-
- # save our PID to the lock file
- echo "$$" >"${FILE}.lock"
-
- listen_save_replay_forever "${FILE}" "${MY_PORT}" "${BACKEND_HOST}" "${BACKEND_PORT}"
- ret=$?
-
- log "listener exited."
- exit ${ret}
-
- } 9>>"${FILE}.lock"
-
- # we can only get here if ${FILE}.lock cannot be created
- log "Cannot create file ${FILE}."
- exit 3
-
-elif [ "${MODE}" = "stop" ]
- then
-
- {
- flock -n 9
- # shellcheck disable=SC2181
- if [ $? -ne 0 ]
- then
- pid=$(<"${FILE}".lock)
- log "Killing process ${pid}..."
- kill -TERM "-${pid}"
- exit 0
- fi
-
- log "File ${FILE}.lock has been locked by me but it shouldn't. Is a collector running?"
- exit 4
-
- } 9<"${FILE}.lock"
-
- log "File ${FILE}.lock does not exist. Is a collector running?"
- exit 5
-
-else
-
- cat <<EOF
-Usage:
-
- "${0}" start|stop PORT [BACKEND_HOST BACKEND_PORT]
-
- PORT The port this script will listen
- (configure netdata to use this as a second backend)
-
- BACKEND_HOST The real backend host
- BACKEND_PORT The real backend port
-
- This script can act as fallback backend for netdata.
- It will receive metrics from netdata, save them to
- ${FILE}
- and once netdata reconnects to the real-backend, this script
- will push all metrics collected to the real-backend too and
- wait for a failure to happen again.
-
- Only one netdata can connect to this script at a time.
- If you need fallback for multiple netdata, run this script
- multiple times with different ports.
-
- You can run me in the background with this:
-
- screen -d -m "${0}" start PORT [BACKEND_HOST BACKEND_PORT]
-EOF
- exit 1
-fi