keepalived 配置文件中 shell 脚本中case选择语句写法

admin

cat /etc/init.d/keepalived
2 C2 v- F& A3 }. A3 G#! /bin/sh
4 M2 S  I( ?# U! L" P( v$ D* P#
4 q( s. q! t% T; w# keepalived   LVS cluster monitor daemon.
( u) {5 S( a, Z6 Z" p- ]#
#              Written by Andres Salomon <dilinger@voxel.net>
7 q/ `. ~7 r  P9 v- t3 t$ Z/ v1 X#
6 i8 ^/ k8 M/ N* {6 d### BEGIN INIT INFO
# Provides:          keepalived
# Required-Start:    $syslog $network $remote_fs
/ F: i) V, U( {% I: ]# Required-Stop:     $syslog $network $remote_fs
, [9 o0 |4 q5 u- @+ w6 D# Default-Start:     2 3 4 5
) }" ^$ X4 p' A+ e6 O3 f. t# Default-Stop:      0 1 6
# Short-Description: Starts keepalived
# Description:       Starts keepalived lvs loadbalancer
### END INIT INFO
PATH=/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/keepalived
NAME=keepalived
7 J1 Z$ O" T; h( }) G% rDESC=keepalived
CONFIG=/etc/keepalived/keepalived.conf
TMPFILES="/tmp/.vrrp /tmp/.healthcheckers"
#includes lsb functions
1 [& Q; @; H  a/ m5 V' }& k) Z. /lib/lsb/init-functions
9 l' N  C4 z7 U+ Stest -f $CONFIG || exit 0
6 l9 x1 X# B& n/ Xtest -f $DAEMON || exit 0
$ ?" g8 n; `* H7 t' D
2 c0 E/ ]3 c! z5 E+ J+ @% w8 p0 L# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME
case "$1" in
. ]+ ]' S. O; K" d% R+ O! l3 H; f  start)
9 b! [1 J2 V1 m0 q" I/ D        log_daemon_msg "Starting $DESC" "$NAME"
for file in $TMPFILES
0 x1 b% F6 D) Q# b& M# g7 A7 v6 X+ { do
         test -e $file && test ! -L $file && rm $file
done
! w, B8 j* d' T+ m4 s if start-stop-daemon --start --quiet --pidfile /var/run/$NAME.pid \
1 @" W  T5 j3 x               --exec $DAEMON -- $DAEMON_ARGS; then
  log_end_msg 0
else
  log_end_msg 1
fi
6 u, c- l' E6 X# ~$ A# \# B6 `       ;;
, K; n2 Y  }0 ~/ _0 K- B  stop)
2 L. P* X! m# n9 r6 W) V log_daemon_msg "Stopping $DESC" "$NAME"
if start-stop-daemon --oknodo --stop --quiet --pidfile /var/run/$NAME.pid \
9 w, b. O. F# L* D         --exec $DAEMON; then
  log_end_msg 0
else
  log_end_msg 1
fi
       ;;
  reload|force-reload)
7 F1 T) q+ |$ d log_action_begin_msg "Reloading $DESC configuration..."
       if start-stop-daemon --stop --quiet --signal 1 --pidfile \
               /var/run/$NAME.pid --exec $DAEMON; then
        log_end_msg 0
0 x" X4 I6 K* \" P- {3 h8 c3 x else
  log_action_end_msg 1
fi
% K2 S+ V, ?2 K) L       ;;
+ G# ~3 F. j% M- R$ y  restart)
2 N2 J: G) m% W0 O& }1 q+ T   log_action_begin_msg "Restarting $DESC" "$NAME"
        start-stop-daemon --stop --quiet --pidfile \
  /var/run/$NAME.pid --exec $DAEMON || true
       sleep 1
       if start-stop-daemon --start --quiet --pidfile \
               /var/run/$NAME.pid --exec $DAEMON -- $DAEMON_ARGS; then
        log_end_msg 0
else
5 i; }% h5 i; a3 ]' N/ V" x  log_end_msg 1
fi
       ;;
  *)
6 E; n! U+ b# }: H4 `       echo "Usage: /etc/init.d/$NAME {start|stop|restart|reload|force-reload}" >&2
       exit 1
3 K' p) G6 t6 {  i       ;;
! {' E7 r% Y1 M+ J  `/ Kesac
* {! w+ }" \+ hexit 0