脚本功能：

1. 监控CPU使用率

2. 监控内存使用状况

3. 监控网络流量

#!/usr/bin/env  python
# --*-- coding:UTF-8 --*--
import  sys
import  tab
import  re
import  os
import  time
from docker  import Client
import  commands
keys_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 = None
def start(container_name):global container_statsconn=Client(base_url='unix://run/docker.sock',version='1.19')generator=conn.stats(container_name)try:container_stats=eval(generator.next())except NameError,error_msg:pass
#        print error_msgcontainer_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  returnvalelif 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_resultprint  returnvalelif 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_resultprint returnvalelif 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 returnvalelif 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 returnvalelif 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 returnval
if __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_listprint "你输入的容器名称错误，请重新执行脚本，并输入上述正确的容器名称."sys.exit(1)else:container_name = sys.argv[1]if sys.argv[2] not in keys_container_stats_list:print keys_container_stats_listprint '你输入的容器监控项不在监控范围，请重新执行脚本，并输入上述正确的监控项.'sys.exit(1)else:monitor_item = sys.argv[2]if sys.argv[3] not in merit_list:print merit_listprint "你输入的容器监控明细详细不在监控范围内，请重新执行脚本，并输入上述正确的明细监控指标."else:merit = sys.argv[3]monitor_docker(monitor_item,merit)