Python script monitoring docker container

This article describes how to monitor docker containers by using python scripts. For more information, see the examples in this article, the details are as follows:

Script Function:

1. Monitor CPU usage

2. Monitor memory usage

3. Monitor network traffic

Code:

#! /Usr/bin/env python # -- * -- coding: UTF-8 -- * -- import sysimport tabimport reimport osimport timefrom docker import Clientimport commandskeys_container_stats_list = ['blkio _ stats ', 'precpu _ stats', 'network', 'read', 'memory _ stats', 'cpu _ stats'] merit_list = ['usage', 'limit ', 'mem _ use_percent ', 'total _ cpu_usage', 'System _ cpu_usage ', 'cpu _ usage_percent', 'rx _ bytes ', 'tx _ bytes '] returnval = Nonedef start (container_name): global container_stats conn = Client (base_url = 'unix: // run/docker. sock ', version = '1. 19 ') generator = conn. stats (container_name) try: container_stats = eval (generator. next () handle T NameError, error_msg: pass # print error_msg container_stats = eval (generator. next () finally: conn. close () def monitor_docker (monitor_item, merit): if merit = 'mem _ use_percent ': start (container_name) mem_usage = container_stats ['memory _ stats'] ['usage'] mem_limit = container_stats ['memory _ stats'] ['limit'] returnval = round (float (mem_usage) /float (mem_limit), 2) print returnval elif merit = 'System _ cpu_usage ': start (container_name) first_result = container_stats ['cpu _ stats'] ['System _ cpu_usage '] start (container_name) second_result = container_stats ['cpu _ stats'] ['System _ cpu_usage '] returnval = second_result-first_result print returnval elif merit = 'total _ cpu_usage': start (container_name) first_result = container_stats ['cpu _ stats'] ['cpu _ usage'] ['total _ usage'] start (container_name) second_result = container_stats ['cpu _ stats'] ['cpu _ usage'] ['total _ usage'] returnval = second_result-first_result print returnval elif merit = 'cpu _ usage_percent': start (container_name) system_use = container_stats ['cpu _ stats'] ['System _ cpu_usage'] total_use = container_stats ['cpu _ stats'] ['cpu _ usage'] ['total _ usage'] cpu_count = len (container_stats ['cpu _ stats'] ['cpu _ usage'] ['percpu _ usage']) returnval = round (float (total_use)/float (system_use) * cpu_count * 100.0, 2) print returnval elif merit = 'rx _ bytes ': command = '''docker exec-it api1 ifconfig eth1 | grep "bytes" | awk '{print $2}' | awk-F ': ''{print $2} ''' result_one = commands. getoutput (command) time. sleep (1) command = '''docker exec-it api1 ifconfig eth1 | grep "bytes" | awk '{print $2}' | awk-F ': ''{print $2} ''' result_second = commands. getoutput (command) returnval = round (int (result_second)-int (result_one)/1024,2) print returnval elif merit = 'tx _ bytes ': command = '''docker exec-it api1 ifconfig eth1 | grep "bytes" | awk '{print $6}' | awk-F ': ''{print $2} ''' result_one = commands. getoutput (command) time. sleep (1) command = '''docker exec-it api1 ifconfig eth1 | grep "bytes" | awk '{print $6}' | awk-F ': ''{print $2} ''' result_second = commands. getoutput (command) returnval = round (int (result_second)-int (result_one)/1024,2) print returnvalif _ name _ = '_ main __': command = '''docker ps | awk' {print $ NF} '| grep-v "NAMES" ''' str = commands. getoutput (command) container_counts_list = str. split ('\ n') if sys. argv [1] not in container_counts_list: print container_counts_list print "the container name you entered is incorrect. Please run the script again and enter the correct container name. "sys. exit (1) else: container_name = sys. argv [1] if sys. argv [2] not in keys_container_stats_list: print keys_container_stats_list print 'The Container Monitoring item you entered is not in the monitoring range. Please re-execute the script and enter the correct monitoring item. 'sys. exit (1) else: monitor_item = sys. argv [2] if sys. argv [3] not in merit_list: print merit_list print "the details of the container monitoring you entered are not within the monitoring range. Please re-execute the script and enter the correct detailed monitoring metrics. "else: merit = sys. argv [3] monitor_docker (monitor_item, merit)

The above is all the code of the python script to monitor the docker container. I hope it will be helpful for you to learn.