bash_shell - some - 《IT_programmer》

ssh 远程运行命令
getopts 与 getopt ，shell 脚本接收外界参数
awk 获取变量
shell 脚本技巧 ,健壮性

ssh 远程运行命令
getopts 与 getopt ，shell 脚本接收外界参数
awk 获取变量

ssh 远程运行命令

pssh
https://blog.csdn.net/fdipzone/article/details/23000201
#!/bin/bash
ssh -f -n -l www-online 192.168.110.34 “/home/www-online/uptimelog.sh &” # 后台运行ssh
pid=$(ps aux | grep “ssh -f -n -l www-online 192.168.110.34 /home/www-online/uptimelog.sh” | awk ‘{print $2}’ | sort -n | head -n 1) # 获取进程号
echo “ssh command is running, pid:${pid}”
sleep 3 && kill ${pid} && echo “ssh command is complete” # 延迟3秒后执行kill命令，关闭ssh进程，延迟时间可以根据调用的命令不同调整
exit 0
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版权声明：本文为CSDN博主「傲雪星枫」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/fdipzone/article/details/23000201

getopts 与 getopt ，shell 脚本接收外界参数

https://cloud.tencent.com/developer/article/1043821

awk 获取变量

work_pwd="/cloud/app/sls-common/WebServer#/sls_web/1207787_sls-common_WebServer"
## 基础样式
sudo cat > ./overwrite.sh << EOF
#!/bin/sh
work_dir=/cloud/app/sls-backend-server/InitDependentSystem#/init_dependent_system
ls \$work_dir/1350852_sls-backend-server_InitDependentSystem
sudo mkdir \$work_dir/1350852_sls-backend-server_InitDependentSystem.overwrite
sudo /cloud/tool/tianji/overwrite add sls-backend-server InitDependentSystem# init_dependent_system 1350852_sls-backend-server_InitDependentSystem 30 -f  ## 添加 overwrite
sudo cp -pr \$work_dir/1350852_sls-backend-server_InitDependentSystem/* \$work_dir/1350852_sls-backend-server_InitDependentSystem.overwrite/
# sudo /cloud/tool/tianji/overwrite remove sls-backend-server InitDependentSystem# init_dependent_system 1350852_sls-backend-server_InitDependentSystem   ## 移除 overwrite
# sudo rm -rf /cloud/app/sls-backend-server/InitDependentSystem#/init_dependent_system/1350852_sls-backend-server_InitDependentSystem.overwrite
sudo tjc stop sls-backend-server.InitDependentSystem#
sudo tjc start sls-backend-server.InitDependentSystem#
EOF
## 修改参数
eval $(echo $work_pwd|awk -F"/cloud/app" '{print $2}'|awk -F"/" '{printf("Service=%s;SR=%s;APP=%s;BuildID=%s;",$2,$3,$4,$5)}')
sudo sed -i "s/1350852_sls-backend-server_InitDependentSystem/$BuildID/g" ./overwrite.sh                             # 修改 buildID 
sudo sed -i "s/sls-backend-server/$Service/g" ./overwrite.sh             # 修改 service
sudo sed -i "s/InitDependentSystem#/$SR/g" ./overwrite.sh             # 修改 SR
sudo sed -i "s/init_dependent_system/$APP/g" ./overwrite.sh  # 修改 application

shell 脚本技巧 ,健壮性

https://zhuanlan.zhihu.com/p/73728157
   https://twosee.cn/2018/03/18/stronger-shell/#%E4%BD%BF%E7%94%A8set-u
   https://segmentfault.com/a/1190000006900083
   https://segmentfault.com/a/1190000002539169
   https://zhuanlan.zhihu.com/p/46100771
   https://stackoverflow.com/questions/35800082/how-to-trap-err-when-using-set-e-in-bash
例子

#!/bin/bash
set -e -o errtrace -o pipefail  ## set -eE / set -e -o errtrace  检测到 程序出错后，报错，中断。 
err() {
  echo "Error occurred:"
  awk 'NR>L-3 && NR<L+3 { printf "%-5d%3s%s\n",NR,(NR==L?">>>":""),$0 }' L=$1 $0
}
## 用来捕获  异常的 信号， ，捕获到之后， 执行上面的 err() {} 函数
trap 'err $LINENO' ERR
## 用来捕获异常的  函数。
function error_exit {
echo "$1" 1>&2
exit 1
}
ARGS=`getopt -o h:: --long "src_files:,dest_dir:,remove::" -n 'example.sh' -- "$@"`
if [ $? != 0 ]; then
  ## echo -e '\n'  换行
  echo -e "EROOR, the ADD overwrite option is:  bash overwrite.sh --src_files=XXX --dest_dir=XX \n or the REMOVE overwrite  option is:  bash overwrite.sh --dest_dir=XX --remove"
  exit 1
fi
#echo $ARGS ，  getopt, 还有一种 getopts
#将规范化后的命令行参数分配至位置参数（$1,$2,...)
eval set -- "${ARGS}"
while true
do
  case "$1" in
      -h)
          echo -e "the ADD overwrite option is:  bash overwrite.sh --src_files=XXX --dest_dir=XX \n or the REMOVE overwrite  option is:  bash overwrite.sh --dest_dir=XX --remove"
          echo "--src_files is divided by ','"
          echo "--dest_dir is like '/cloud/app/sls-common/WebServer#/sls_web/current', it must start with '/cloud/app/sls-common/WebServer#/sls_web/' "
          echo "--remove ,when you want to remove overwrite"
          shift
          ;;
      --src_files)
          echo "--src_files is $2";
          source_files_str=`echo $2 |sed 's/,/ /g'`;  ## 将 逗号 转为空格
          read -a source_files_list  <<< $source_files_str;  ## 将 str 转为数组， 以 单个或多个 空格为分隔。
          for source_file in ${source_files_list[*]}
          do
              ## “||” error_exit  捕获异常， “||”之前的的语句 执行失败，就会 执行 后面的。
              [[ -e $source_file ]] || error_exit "$source_file no exist"
          done
          shift 2
          ;;
      --dest_dir)
          echo $2 | grep ^/cloud/app/ > /dev/null 2>&1 || error_exit "--dest_dir must start with '/cloud/app/'"
          echo "--dest_dir is $2"
          dest_dir=$2
          shift 2
          ;;
      --remove)
          echo "remove overwrite"
          scripts_option="remove"
          shift 2
          ;;
      --)
          shift
          break
          ;;
      *)
          echo -e "EROOR, the ADD overwrite option is:  bash overwrite.sh --src_files=XXX --dest_dir=XX \n or the REMOVE overwrite  option is:  bash overwrite.sh --dest_dir=XX --remove"
          echo "Internal error!"
          exit 1
          ;;
  esac
done
#处理剩余的参数
for arg in $@
do
  echo "processing $arg"
done
write_overwrite_sh () {
## \$current_dir 在 cat 添加的时候 转义。
sudo cat > ./overwrite.sh << EOF
#!/bin/sh
current_dir=/cloud/app/sls-backend-server/InitDependentSystem#/init_dependent_system
sudo mkdir  -p \$current_dir/1350852_sls-backend-server_InitDependentSystem.overwrite
sudo /cloud/tool/tianji/overwrite add sls-backend-server InitDependentSystem# init_dependent_system 1350852_sls-backend-server_InitDependentSystem 30 -f  
sudo cp -pr \$current_dir/1350852_sls-backend-server_InitDependentSystem/* \$current_dir/1350852_sls-backend-server_InitDependentSystem.overwrite/
##### sudo /cloud/tool/tianji/overwrite remove sls-backend-server InitDependentSystem# init_dependent_system 1350852_sls-backend-server_InitDependentSystem   
##### sudo rm -rf /cloud/app/sls-backend-server/InitDependentSystem#/init_dependent_system/1350852_sls-backend-server_InitDependentSystem.overwrite
# echo '### restart SR '
sudo tjc stop sls-backend-server.InitDependentSystem# > /dev/null 2>&1 && sudo tjc start sls-backend-server.InitDependentSystem#  > /dev/null 2>&1;
EOF
}
get_common_varabiles () {
  ## 获取变量  ## 按'/' 分隔后 设置变量。 Service=$2 ;SR=$3 ;APP=$4;
  eval $(echo $dest_dir|awk -F"/cloud/app" '{print $2}'|awk -F"/" '{printf("Service=%s;SR=%s;APP=%s;",$2,$3,$4)}')
  current_dir=`echo $dest_dir|awk -F'current' '{print $1}'`
  alread_install_dir=$current_dir'current/alread_installed'
  overwrite_script=$current_dir'overwrite.sh'
  machine_ip_str=`tj_show -ip -r $Service'.'$SR`  
  read -a machine_ip_list  <<< $machine_ip_str
  echo `ssh -l root ${machine_ip_list[0]} ls -l $current_dir` > BuildID_str
  BuildID=`cat BuildID_str|grep current|awk -F'-> ' '{print $2}'|awk '{print $1}'|sed 's/.overwrite//g'`
  echo "### buildID:",$BuildID
}
fix_overwrite_sh () {
  chmod +x ./overwrite.sh                           
  sudo sed -i "s/1350852_sls-backend-server_InitDependentSystem/$BuildID/g" ./overwrite.sh 
  sudo sed -i "s/sls-backend-server/$Service/g" ./overwrite.sh            
  sudo sed -i "s/InitDependentSystem#/$SR/g" ./overwrite.sh             
  sudo sed -i "s/init_dependent_system/$APP/g" ./overwrite.sh  
}
get_remote_varabiles () {
  restart_SR_cmd=`tail -n 1 overwrite.sh`
  remove_overwrite_cmd=`tail -n 5 overwrite.sh|head -n 1|awk -F'##### ' '{print $2}'`
  re_overwrite_dir=`tail -n 4 overwrite.sh|head -n 1|awk -F'##### ' '{print $2}'`
}
build_overwrite () {
  ## 用 `` 是为了让 保证  先让这个 shell 命令执行完，才执行下一条 shell 命令。
  scp_done=`scp ./overwrite.sh   root@$machine_ip:/$current_dir > /dev/null 2>&1 &`
  echo `ssh -l  root $machine_ip $overwrite_script` 
  ## for 遍历 
  for source_file in ${source_files_list[*]}
  do
      echo '## ip: '$machine_ip'  '$source_file >> source_file.txt
      scp_done=`scp  $source_file  root@$machine_ip:/$dest_dir > /dev/null 2>&1 &`
  done
  echo `ssh -l  root $machine_ip  rm -rf $current_dir'current/alread_installed'`  
  echo `ssh -l  root $machine_ip $restart_SR_cmd`  
}
remove_overwrite () {
  echo `ssh -l  root $machine_ip "$remove_overwrite_cmd > /dev/null 2>&1 &"`
  echo `ssh -l  root $machine_ip "$re_overwrite_dir > /dev/null 2>&1 &"`
}
main () {
  echo "## source" > source_file.txt
  echo "## machine_ip" > machine_ip.txt
  for machine_ip in ${machine_ip_list[*]}
  do
      echo $machine_ip >> machine_ip.txt
      if [ $scripts_option ]
      then
          remove_overwrite
          echo "### Remove overwrite, ip:$machine_ip  $remove_overwrite_cmd "
      elif [ $dest_dir ] && [ $source_files_list ]
      then 
          build_overwrite
          echo "### build ip="$machine_ip,' '$Service/$SR/$APP/$BuildID/'successfully!'
      fi
  done  
}
write_overwrite_sh
get_common_varabiles
fix_overwrite_sh
get_remote_varabiles
main

some

ssh 远程运行命令

getopts 与 getopt ，shell 脚本 接收 外界参数

awk 获取变量

shell 脚本技巧 ,健壮性

getopts 与 getopt ，shell 脚本接收外界参数