First, before writing the script, you need to know about the theoretical knowledge and practical operation of rsync, ok to write a script.
Let's take a stroke of a stroke:
rsync start command:
rsync --daemon
Stop command:
kill rsync process ID
pkill rsync
killall rsync
Man of few words said on the script:
#!/bin/bash
#####################################
# File Name: rsyncd.sh
# Version: V1.0
# Author: wuhan
# Created Time : 2018-10-14 13:19:53
# Description: rsync service script
#####################################
. /etc/init.d/functions
# Loaded first /etc/init.d/functions, we will need to be inside the base function
lockfile="/var/lock/subsys/rsyncd"
# Define a variable lock file
rpfp="/var/run/rsyncd.pid"
# Write a variable rsync port ID, to facilitate multiple references can be used in this script
# Write a function called start
start(){
#Function name
rsync --daemon && >/dev/null
#rsync service Start command to empty after a successful start
retval=$?
# Get Return value
if [ $retval -eq 0 ]
If the return value is equal to 0 #
then
# Then do the following
action "rsync startup ok" /bin/true
# Successful start with the action function of the output of the content and displays the ok
touch $lockfile
# Create a lock file
return $retval
# Returns the start command after the return value
else
#otherwise
action "rsync startup fail" /bin/false
# Output for the service failed to start in the display false
return $retval
# Also returns after the command to start the return value, easy troubleshooting
be
#drop out
}
# Write a stop command function called stop
stop(){
if test -s "$rpfp"
If the port ID # file length is not zero, then true, perform the following operations
then
rsyncd_pid=`cat $rpfp`
# Define a variable port ID number
if (kill -0 $rsyncd_pid &>/dev/null)
# If the port ID number exists, and outputs it to the empty
then
# Do the following
kill $rsyncd_pid
# Kill rsync service by process ID
retval=$?
# Get Return value
if [ $retval -eq 0 ]
# If the return value is equal to 0, the following command
then
action "rsync stop ok" /bin/true
# Output service stops successfully, display ok
rm -fr $lockfile
# If you kill the rsync service, then remove the lock file
return "$retval"
# Get Return value
else
# Otherwise, do the following
action "rsync stop fail" /bin/false
# Rsync stop output fails to display false
return $retval
# Get the return value
be
else
#otherwise
echo "rsyncd process is not exist."
Tip # rsync process does not exist
return 2
# Returns the value 2
be
else
#otherwise
echo "${rpfp}is not exist,or rsync does not startup"
# Indicates the port number does not exist or rsync service did not start
be
#End
}
case "$1" in
# Because writing a function, so we have here is more suitable case structure conditionals, variables defined as $ 1
start)
# Match to start execution start and get the return value of the function
start
retval=$?
;;
stop)
# Match to stop the implementation of stop and get the return value of the function
stop
retval=$?
;;
restart)
# Match to restart executed first stop function sleep 1s achieved restart the execution start, and get return values
stop
sleep 1
start
retval=$?
;;
*)
# No match to a prompt on the output can only perform three functions of
echo " usage: $0 {start|stop|restart} "
exit 1
esac
#End
exit $retval
# Exit and thereby obtain the return value judgment
Test: smart you can see the PID process ID changes after our stop and restart open, indicating that the script ok.
[root@node1 ~]# lsof -i:873 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME rsync 10044 root 4u IPv4 639767 0t0 TCP *:rsync (LISTEN) rsync 10044 root 5u IPv6 639768 0t0 TCP *:rsync (LISTEN) [root@node1 ~]# sh /server/scripts/09/rsyncd3.sh stop rsync stop ok [ OK ] [root@node1 ~]# lsof -i:873 [root@node1 ~]# [root@node1 ~]# sh /server/scripts/09/rsyncd3.sh start rsync startup ok [ OK ] [root@node1 ~]# lsof -i:873 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME rsync 10212 root 4u IPv4 664268 0t0 TCP *:rsync (LISTEN) rsync 10212 root 5u IPv6 664269 0t0 TCP *:rsync (LISTEN) [root@node1 ~]# sh /server/scripts/09/rsyncd3.sh restart rsync stop ok [ OK ] rsync startup ok [ OK ] [root@node1 ~]# lsof -i:873 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME rsync 10227 root 4u IPv4 664325 0t0 TCP *:rsync (LISTEN) rsync 10227 root 5u IPv6 664326 0t0 TCP *:rsync (LISTEN)
This script copy and paste to use, and requires /etc/rsyncd.conf configured pid lock file