bash 用于记录 Linux 进程的 CPU 和内存使用情况的 Shell 脚本
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Shell script for logging cpu and memory usage of a linux process
提问by Andy Dufresne
I am looking for a way to log and graphically display cpu and RAM usage of linux processes over time. Since I couldn't find a simple tool to so (I tried zabbix and munin but installation failed) I started writing a shell script to do so
我正在寻找一种方法来记录并以图形方式显示 Linux 进程随时间推移的 CPU 和 RAM 使用情况。由于我找不到一个简单的工具（我尝试了 zabbix 和 munin 但安装失败）我开始编写一个 shell 脚本来这样做
The script file parses the output of top command through awk and logs into a csv file. It
脚本文件通过awk解析top命令的输出，并记录到csv文件中。它
- Figures out the pid of the processes through ps command
- Uses top and awk to log cpu and memory usage.
- 通过ps命令找出进程的pid
- 使用 top 和 awk 来记录 CPU 和内存使用情况。
Here is how the script looks like
这是脚本的样子
#!/bin/sh
#A script to log the cpu and memory usage of linux processes namely - redis, logstash, elasticsearch and kibana
REDIS_PID=$(ps -ef | grep redis | grep -v grep | awk '{print }')
LOGSTASH_PID=$(ps -ef | grep logstash | grep -v grep | awk '{print }')
ELASTICSEARCH_PID=$(ps -ef | grep elasticsearch | grep -v grep | awk '{print }')
KIBANA_PID=$(ps -ef | grep kibana | grep -v grep | awk '{print }')
LOG_FILE=/var/log/user/usage.log
echo $LOG_FILE
top -b | awk -v redis="$REDIS_PID" -v logstash="$LOGSTASH_PID" '/redis|logstash/ {print ","","","}'
How do I
我如何能
- Print the resource usage for multiple processes. Specifying multiple variables in the awk pattern is not working. It prints the usage for the first pid (redis in the above script)
- Print current timestamp when printing the resource details (through date +"%T")
- Print the process name along with the resource usage. Redis, Logstash, ElasticSearch or Kibana in the above case
- Redirect the above commands output to a log file. I tried > $LOG_FILE but it didn't work.
- 打印多个进程的资源使用情况。在 awk 模式中指定多个变量不起作用。它打印第一个pid的用法（上面脚本中的redis）
- 打印资源详情时打印当前时间戳（截止日期+"%T"）
- 打印进程名称以及资源使用情况。上述案例中的Redis、Logstash、ElasticSearch或Kibana
- 将上述命令输出重定向到日志文件。我试过 > $LOG_FILE 但它没有用。
Thoughts/Inputs?
想法/输入？
Thanks in advance.
提前致谢。
回答by anubhava
To figure out PIDs you can simplify your script greatly using pgrep:
要找出 PID，您可以使用 pgrep 大大简化您的脚本：
REDIS_PID=$(pgrep -f redis)
LOGSTASH_PID=$(pgrep -f logstash)
ELASTICSEARCH_PID=$(pgrep -f elasticsearch)
KIBANA_PID=$(pgrep -f kibana)
EDIT:Sorry had to leave for some work and couldn't provide the full answer.
编辑：抱歉不得不离开一些工作，无法提供完整的答案。
In order to capture top's output use following script:
为了捕获 top 的输出，请使用以下脚本：
while :; do
top -n 1 -b | awk -v redis="$REDIS_PID" -v logstash="$LOGSTASH_PID"
' == redis || == logstash {print ","","","}' >> $LOG_FILE
sleep 3
done
