查询Ceph的OSD占用内存

时间：2022-10-13 06:47:32

前言

之前写过一篇关于查询OSD的运行的CPU的情况的分享，本篇是讲的获取内存占用的，代码包括两种输出，一种是直接的表格，一种是可以方便解析的json

代码

直接上代码，python才用不久，所以可能代码实现比较低级，主要是看实现的方法

#!/usr/bin/env python

# -*- coding: UTF-8 -*-

import os

import sys

import json

import psutil

import commands

from prettytable import PrettyTable

def main():

    if len(sys.argv) == 1:

        printosdmemtable("table")

    elif sys.argv[1] == 'json':

        printosdmemtable("json")

def printosdmemtable(chosse):

        data_dic = {}

        osd_list={}

        row = PrettyTable()

        row.header = True

        memlist = ["OSD\MEM"]

        memchose = [ 'VIRT','RES']

        for meminfo in memchose:

            memlist.append("%s" %meminfo )

        row.field_names = memlist

        for root, dirs, files in os.walk('/var/run/ceph/'):

            for name in files:

                if "osd"  in name and "pid" in name :

                    osdlist = []

                    osdthlist=[]

                    for osdmem in range(len(memchose)):

                        osdlist.append(" ")

                    pidfile=root+ name

                    osdid=commands.getoutput('ls  %s|cut -d "." -f 2 2>/dev/null'  %pidfile )

                    osdpid = commands.getoutput('cat %s  2>/dev/null' %pidfile)

                    osd_runmemvsz = commands.getoutput('ps -p %s  -o vsz |grep -v VSZ 2>/dev/null' %osdpid)

                    osd_runmemrsz = commands.getoutput('ps -p %s  -o rsz |grep -v RSZ 2>/dev/null' %osdpid)

                    osdname="osd."+osdid

                    osdlist.insert(0,osdname)

                    osdlist[1] = str(int(osd_runmemvsz)/1024)+"KB"

                    osdlist[2] = str(int(osd_runmemrsz)/1024)+"KB"

                    vm_dic = {}

                    vm_dic['VSZ']= str(int(osd_runmemvsz)/1024)+"KB"

                    vm_dic['RSZ']= str(int(osd_runmemrsz)/1024)+"KB"

                    osd_list[osdname] = vm_dic

                    data_dic['osdmemused'] = osd_list

                    if chosse == "table":

                        row.add_row(osdlist)

                    elif chosse == "json":

                        row = json.dumps(data_dic,separators=(',', ':'))

        print row

if __name__ == '__main__':

    main()

运行脚本

[root@lab8106 getmem]# python getmem.py

+---------+-------+------+

| OSD\MEM |  VIRT | RES  |

+---------+-------+------+

|  osd.0  | 825KB | 43KB |

|  osd.1  | 826KB | 43KB |

+---------+-------+------+

[root@lab8106 getmem]# python getmem.py json

{"osdmemused":{"osd.1":{"VSZ":"826KB","RSZ":"43KB"},"osd.0":{"VSZ":"825KB","RSZ":"43KB"}}}

附加

如果在/var/run/ceph下面没有生成pid，就在配置文件/etc/ceph/ceph.conf当中提前加好配置文件然后重启进程

pid_file=/var/run/$cluster/$type.$id.pid

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