查询Ceph的OSD占用内存

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

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#!/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

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[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