keepalived: high-availability files and data sync

[feed/packages.git] / net / keepalived / files / usr / bin / keepalived-rsync-inotify

diff --git a/net/keepalived/files/usr/bin/keepalived-rsync-inotify b/net/keepalived/files/usr/bin/keepalived-rsync-inotify
new file mode 100644 (file)
index 0000000..226f928
--- /dev/null
+++ b/net/keepalived/files/usr/bin/keepalived-rsync-inotify
@@ -0,0 +1,54 @@
+#!/bin/sh
+
+# shellcheck shell=ash
+
+# shellcheck source=/dev/null
+. /lib/functions/keepalived/common.sh
+
+if [ $# -lt 3 ]; then
+       echo "$0 <vrrp_instance> <peer> <rsync_dir>"
+       exit 1
+fi
+
+VRRP_INSTANCE=$1
+PEER=$2
+RSYNC_DIR=$3
+
+INOTIFY_ACTIONS="create,delete,modify,move,moved_to,moved_from"
+INOTIFY_PID=""
+TMP_DIR=/tmp/keepalived
+FIFO_FILE="$TMP_DIR"/inotifywait-$PEER.fifo
+
+daemonize_inotifywait() {
+       /usr/bin/inotifywait -q -r --exclude '/\..+' -o "$FIFO_FILE" -m "$RSYNC_DIR" -e ${INOTIFY_ACTIONS} 2> /dev/null &
+       INOTIFY_PID="$!"
+}
+
+main() {
+       local inotify_action inotify_dir inotify_file
+       local source_file target_file
+
+       [ ! -d "$TMP_DIR" ] && mkdir "$TMP_DIR"
+       mkfifo "${FIFO_FILE}" || exit 1
+
+       daemonize_inotifywait
+
+       while read -r inotify_dir inotify_action inotify_file; do
+               source_file="${inotify_dir}${inotify_file}"
+               target_file=$(echo "${inotify_dir}" | sed -e "s:${RSYNC_DIR}::g")"${inotify_file}"
+
+               log_debug "received $target_file ($inotify_action) in $source_file"
+
+               ACTION=NOTIFY_SYNC TYPE=peer NAME=$PEER INSTANCE=$VRRP_INSTANCE \
+                       RSYNC_SOURCE="${source_file}" RSYNC_TARGET="${target_file}" \
+                       /sbin/hotplug-call keepalived
+       done < "$FIFO_FILE"
+}
+
+TRAP() {
+       [ -n "$INOTIFY_PID" ] && kill "$INOTIFY_PID"
+       [ -e "$FIFO_FILE" ] && rm -f "$FIFO_FILE"
+}
+
+trap TRAP TERM INT
+main "$@"