keepalived 配置文件中 shell 脚本中case选择语句写法

admin

cat /etc/init.d/keepalived
#! /bin/sh
1 J' `, H/ Q1 H; n7 O0 c/ l' x#
# keepalived   LVS cluster monitor daemon.
& M# G2 `2 ?6 ?#
! r, P4 ^5 f5 g/ `1 f#              Written by Andres Salomon <dilinger@voxel.net>
! \' @- F; B6 r+ t#
( Q4 i6 I  H, J0 l0 C/ ?% n### BEGIN INIT INFO
# Provides:          keepalived
- ~& D2 K/ s! P4 N/ M3 P" J- W# Required-Start:    $syslog $network $remote_fs
# Required-Stop:     $syslog $network $remote_fs
4 S2 \8 ^' b7 n/ }# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
: O! X: x2 u) i! j1 A8 e# Short-Description: Starts keepalived
! z5 Q6 a" ~0 Z; r  c# Description:       Starts keepalived lvs loadbalancer
$ m- x# ~, V, ?; }' d### END INIT INFO
0 [) D, J1 H, v% k4 H" X8 y, ^% PPATH=/sbin:/bin:/usr/sbin:/usr/bin
* v6 I( m. I: B7 t. qDAEMON=/usr/sbin/keepalived
NAME=keepalived
DESC=keepalived
CONFIG=/etc/keepalived/keepalived.conf
5 f. [1 `  R+ O, E  rTMPFILES="/tmp/.vrrp /tmp/.healthcheckers"
$ I6 R$ s3 o, m#includes lsb functions
- }" P" B8 Z3 e& H9 L% S. /lib/lsb/init-functions
test -f $CONFIG || exit 0
7 |. K0 E" X6 N" b  \! vtest -f $DAEMON || exit 0
: K% ]' M- Z5 G5 I
# Read configuration variable file if it is present
7 t4 }4 ~; ?/ v  T) p1 a4 l7 p[ -r /etc/default/$NAME ] && . /etc/default/$NAME
case "$1" in
0 O0 B# ?: E& q  p$ T7 x3 {  start)
        log_daemon_msg "Starting $DESC" "$NAME"
for file in $TMPFILES
9 a* d" I2 m1 P; }6 ~ do
. |9 {+ V, H  m0 x: `         test -e $file && test ! -L $file && rm $file
" `9 v5 M5 W1 K" Q6 \% X' B done
if start-stop-daemon --start --quiet --pidfile /var/run/$NAME.pid \
               --exec $DAEMON -- $DAEMON_ARGS; then
7 R) ?6 l9 x0 c: {# s) N. D7 u+ ?  log_end_msg 0
else
+ P. ~) E0 H2 b  log_end_msg 1
fi
       ;;
  stop)
8 q; ^: P- {( z8 x log_daemon_msg "Stopping $DESC" "$NAME"
if start-stop-daemon --oknodo --stop --quiet --pidfile /var/run/$NAME.pid \
         --exec $DAEMON; then
1 D2 M5 J4 q, j' s  log_end_msg 0
9 F9 p5 X5 W( v. S else
  log_end_msg 1
fi
       ;;
  reload|force-reload)
log_action_begin_msg "Reloading $DESC configuration..."
       if start-stop-daemon --stop --quiet --signal 1 --pidfile \
9 H+ r1 f2 a5 F7 T8 b4 E               /var/run/$NAME.pid --exec $DAEMON; then
/ E7 B4 V# ?* E: S$ P  I( A        log_end_msg 0
else
) ?# S" L2 O+ ^; b# k4 X  log_action_end_msg 1
; N' ]+ f: q+ h8 f2 j0 E fi
' C. a! r  A; J7 _$ t% `% t       ;;
" i* j$ w- I, w+ A5 }; M0 K  restart)
) f7 A7 A- o$ s7 i' z& s   log_action_begin_msg "Restarting $DESC" "$NAME"
' o  Q2 S- o& c" c7 C        start-stop-daemon --stop --quiet --pidfile \
  /var/run/$NAME.pid --exec $DAEMON || true
! Q- h/ l3 u. K& T2 N8 Z) V       sleep 1
' Z7 n" H" L+ l( M" V       if start-stop-daemon --start --quiet --pidfile \
2 H# i1 T6 E" S# v; i, L               /var/run/$NAME.pid --exec $DAEMON -- $DAEMON_ARGS; then
        log_end_msg 0
else
3 G8 g1 \/ Y7 y& F  log_end_msg 1
7 U; |$ y4 b0 n1 q, a* z fi
       ;;
4 L/ W: G( B, V9 G  *)
: z( Z+ g. @2 @3 M! {* s       echo "Usage: /etc/init.d/$NAME {start|stop|restart|reload|force-reload}" >&2
$ X# _4 {" s1 K  e9 Q, U       exit 1
* m* y' I% c( r1 l( y       ;;
esac
exit 0