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haproxy-reload

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#!/bin/sh

set -e

export VERBOSE=1

export TIMEOUT=90

export MASTER_SOCKET="${MASTER_SOCKET:-/var/run/haproxy-master.sock}"

alert() {

if [ "$VERBOSE" -ge "1" ]; then

echo "[ALERT] $*" >&2

fi

}

reload() {

if [ -S "$MASTER_SOCKET" ]; then

socat_addr="UNIX-CONNECT:${MASTER_SOCKET}"

else

case "$MASTER_SOCKET" in

*:[0-9]*)

socat_addr="TCP:${MASTER_SOCKET}"

;;

*)

alert "Invalid master socket address '${MASTER_SOCKET}': expected a UNIX socket file or <host>:<port>"

return 1

;;

esac

fi

echo "reload" | socat -t"${TIMEOUT}" "$socat_addr" - | {

read -r status || { alert "No status received (connection error or timeout after ${TIMEOUT}s)."; exit 1; }

case "$status" in

"Success=1") ret=0 ;;

"Success=0") ret=1 ;;

*) alert "Unexpected response: '$status'"; exit 1 ;;

esac

read -r _ # consume "--"

if [ "$VERBOSE" -ge 3 ] || { [ "$ret" = 1 ] && [ "$VERBOSE" -ge 2 ]; }; then

cat >&2

else

cat >/dev/null

fi

exit "$ret"

}

}

usage() {

echo "Usage:"

echo " $0 [options]*"

echo ""

echo " Trigger a reload from the master socket"

echo " Require socat"

echo " EXPERIMENTAL script!"

echo ""

echo "Options:"

echo " -S, --master-socket <addr> Unix socket path or <host>:<port> (default: ${MASTER_SOCKET})"

echo " -d, --debug Debug mode, set -x"

echo " -t, --timeout Timeout (socat -t) (default: ${TIMEOUT})"

echo " -s, --silent Silent mode (no output)"

echo " -v, --verbose Verbose output (output from haproxy on failure)"

echo " -vv --verbose=all Very verbose output (output from haproxy on success and failure)"

echo " -h, --help This help"

echo ""

echo "Examples:"

echo " $0 -S ${MASTER_SOCKET} -d ${TIMEOUT}"

}

main() {

while [ -n "$1" ]; do

case "$1" in

-S|--master-socket)

MASTER_SOCKET="$2"

shift 2

;;

-t|--timeout)

TIMEOUT="$2"

shift 2

;;

-s|--silent)

VERBOSE=0

shift

;;

-v|--verbose)

VERBOSE=2

shift

;;

-vv|--verbose=all)

VERBOSE=3

shift

;;

-d|--debug)

DEBUG=1

shift

;;

-h|--help)

usage "$@"

exit 0

;;

*)

echo "[ALERT] ($$) : Unknown option '$1'" >&2

usage "$@"

exit 1

;;

esac

done

if [ -n "$DEBUG" ]; then

set -x

fi

}

main "$@"

reload