我在多个Web服务器上安装了以下Tomcat Init脚本。
#!/bin/bash
#
# description: Apache Tomcat init script
# processname: tomcat
# chkconfig: 234 20 80
#
#
# Copyright (C) 2014 Miglen Evlogiev
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, see <http://www.gnu.org/licenses/>.
#
# Initially forked from: gist.github.com/valotas/1000094
# Source: gist.github.com/miglen/5590986
#Location of JAVA_HOME (bin files)
export JAVA_HOME=/usr/java/latest
#Add Java binary files to PATH
export PATH=$JAVA_HOME/bin:$PATH
#CATALINA_HOME is the location of the bin files of Tomcat
export CATALINA_HOME=/opt/tomcat9
#CATALINA_BASE is the location of the configuration files of this instance of Tomcat
export CATALINA_BASE=/opt/tomcat9
#TOMCAT_USER is the default user of tomcat
export TOMCAT_USER=tomcat
#TOMCAT_USAGE is the message if this script is called without any options
TOMCAT_USAGE="Usage: $0 {e[00;32mstarte[00m|e[00;31mstope[00m|e[00;31mkille[00m|e[00;32mstatuse[00m|e[00;31mrestarte[00m}"
#SHUTDOWN_WAIT is wait time in seconds for java proccess to stop
SHUTDOWN_WAIT=20
tomcat_pid() {
echo `ps -fe | grep $CATALINA_BASE | grep -v grep | tr -s " "|cut -d" " -f2`
}
start() {
pid=$(tomcat_pid)
if [ -n "$pid" ]
then
echo -e "e[00;31mTomcat is already running (pid: $pid)e[00m"
else
# Start tomcat
echo -e "e[00;32mStarting tomcate[00m"
#ulimit -n 100000
#umask 007
if [ `user_exists $TOMCAT_USER` = "1" ]
then
sudo -u $TOMCAT_USER $CATALINA_HOME/bin/startup.sh
else
echo -e "e[00;31mTomcat user $TOMCAT_USER does not exists. Starting with $(id)e[00m"
sh $CATALINA_HOME/bin/startup.sh
fi
status
fi
return 0
}
status(){
pid=$(tomcat_pid)
if [ -n "$pid" ]
then echo -e "e[00;32mTomcat is running with pid: $pide[00m"
else
echo -e "e[00;31mTomcat is not runninge[00m"
return 3
fi
}
terminate() {
echo -e "e[00;31mTerminating Tomcate[00m"
kill -9 $(tomcat_pid)
}
stop() {
pid=$(tomcat_pid)
if [ -n "$pid" ]
then
echo -e "e[00;31mStoping Tomcate[00m"
echo "DEBUG LINE 95"
sudo -u tomcat $CATALINA_HOME/bin/shutdown.sh
let kwait=$SHUTDOWN_WAIT
count=0;
until [ `ps -p $pid | grep -c $pid` = '0' ] || [ $count -gt $kwait ]
do
echo -n -e "ne[00;31mwaiting for processes to exite[00m";
sleep 1
let count=$count+1;
done
if [ $count -gt $kwait ]; then
echo -n -e "ne[00;31mkilling processes didn't stop after $SHUTDOWN_WAIT secondse[00m"
terminate
fi
else
echo -e "e[00;31mTomcat is not runninge[00m"
fi
return 0
}
user_exists(){
if id -u $1 >/dev/null 2>&1; then
echo "1"
else
echo "0"
fi
}
case $1 in
start)
start
;;
stop)
stop
;;
restart)
stop
start
;;
status)
status
exit $?
;;
kill)
terminate
;;
*)
echo -e $TOMCAT_USAGE
;;
esac
两个服务器都运行相同的Amazon Linux:
NAME="Amazon Linux AMI"
VERSION="2018.03"
ID="amzn"
ID_LIKE="rhel fedora"
VERSION_ID="2018.03"
PRETTY_NAME="Amazon Linux AMI 2018.03"
ANSI_COLOR="0;33"
CPE_NAME="cpe:/o:amazon:linux:2018.03:ga"
HOME_URL="http://aws.amazon.com/amazon-linux-ami/"
两个服务器都运行相同的bash版本:
[ec2-user@host ~]$ echo $BASH_VERSION
4.2.46(2)-release
在一台服务器上,脚本正确设置了PID,创建PID文件并启动tomcat。当我停止Tomcat时,它会成功停止。
在另一台服务器上,脚本集两个 pids不会创建PID文件,而是启动tomcat。当我停止tomcat时,我会收到此错误:
/etc/init.d/tomcat9: line 100: [: =: unary operator expected
我知道如何纠正这一点,但是为什么在世界上,在两个主机上,出于所有意图和目的,行为有所不同?他们俩都使用相同的Ansible Playbook和角色进行配置,如图所示,它们正在运行相同的版本。那么什么给出?
我猜这是行100:
until [ `ps -p $pid | grep -c $pid` = '0' ] || [ $count -gt $kwait ]
显然是流程$ pid未运行:GREP输出为 empty ,外壳看到以下内容:
until [ = '0' ] || [ $count -gt $kwait ]
由于[
命令现在只有2个参数,因此它会发出有关=
是无效的单一操作员的错误。
您需要引用所有参数,我建议使用$()
代替Backticks:
until [ "$(ps -p $pid | grep -c $pid)" = '0' ] || [ $count -gt $kwait ]
# ..... ^^^ ....................... ^^