检查服务状态答案

【问题标题】：Check Status of Services检查服务状态
【发布时间】：2021-11-11 12:06:24
【问题描述】：

我正在尝试创建一个脚本来从不同的远程服务器获取服务状态：

#!/bin/bash

USERNAME=vagrant

isengine=(server1 server2 server3 server4 server5)
isengine_services=( ds.rc DFDServer ISFAgents ODFEngine)


for h in "${isengine[@]}"
do
  echo "${h}" >> test.txt
  for i in "${isengine_services[@]}"
  do
     sshpass -p "mysecret" ssh  -o StrictHostKeyChecking=no  "${USERNAME}"@"${h}" "echo ${i}; systemctl status ${i} | grep Active" >> tmp.txt

  done
done

cat tmp.txt

我得到如下所示的非常混乱的输出：

server1
ds.rc
   Active: active (running) since Mon 2021-09-13 10:04:48 CEST; 3 days ago
DFDServer
   Active: active (running) since Mon 2021-09-13 10:05:02 CEST; 3 days ago
ISFAgents
   Active: active (running) since Mon 2021-09-13 10:04:46 CEST; 3 days ago
ODFEngine
   Active: active (running) since Mon 2021-09-13 10:04:20 CEST; 3 days ago

是否可以让它看起来像下面这样：

server1

ds.rc       Active: active (running) since Mon 2021-09-13 10:04:48 CEST; 3 days ago
DFDServer   Active: active (running) since Mon 2021-09-13 10:05:02 CEST; 3 days ago
ISFAgents   Active: active (running) since Mon 2021-09-13 10:04:46 CEST; 3 days ago
ODFEngine   Active: active (running) since Mon 2021-09-13 10:04:20 CEST; 3 days ago

【问题讨论】：

标签： shell awk

【解决方案1】：

您可以使用 GNU AWK 将两行代码转换为一行代码，如下所示，让 file.txt 内容为

server1
ds.rc
   Active: active (running) since Mon 2021-09-13 10:04:48 CEST; 3 days ago
DFDServer
   Active: active (running) since Mon 2021-09-13 10:05:02 CEST; 3 days ago
ISFAgents
   Active: active (running) since Mon 2021-09-13 10:04:46 CEST; 3 days ago
ODFEngine
   Active: active (running) since Mon 2021-09-13 10:04:20 CEST; 3 days ago

然后

awk '{ORS=NR%2?"\n":" ";print}' file.txt

输出

server1
ds.rc    Active: active (running) since Mon 2021-09-13 10:04:48 CEST; 3 days ago
DFDServer    Active: active (running) since Mon 2021-09-13 10:05:02 CEST; 3 days ago
ISFAgents    Active: active (running) since Mon 2021-09-13 10:04:46 CEST; 3 days ago
ODFEngine    Active: active (running) since Mon 2021-09-13 10:04:20 CEST; 3 days ago

说明：如果当前行数 (NR) 是奇数（即除以 2 的余数非零），则打印此行后跟换行符，否则使用空格（condition?value1:value2 是 AWK 的三进制运算符，如果满足条件则使用value1，否则使用value2）。换句话说，将每个偶数行和后续行连接起来，它们之间有空格。

（在 gawk 4.2.1 中测试）

【讨论】：

【解决方案2】：

您可以从此设置服务变量：

isengine_services=( ds.rc DFDServer ISFAgents ODFEngine)

变成这样：

isengine_services="ds.rc DFDServer ISFAgents ODFEngine"

并替换内部循环：

  for i in "${isengine_services[@]}"
  do
     sshpass -p "mysecret" ssh  -o StrictHostKeyChecking=no  "${USERNAME}"@"${h}" "echo ${i}; systemctl status ${i} | grep Active" >> tmp.txt
  done

用这个：

echo $h  >> tmp.txt
sshpass -p "mysecret" ssh  -o StrictHostKeyChecking=no  "${USERNAME}"@"${h}" "systemctl status $isengine_services"  >> tmp.txt

【讨论】：