查询OSD运行在哪些cpu上


前言

在看CPU相关的文章的时候,想起来之前有文章讨论是否要做CPU绑定,这个有说绑定的也有说不绑定的,然后就想到一个问题,有去观测这些OSD到底运行在哪些CPU上面么,有问题就好解决了,现在就是要查下机器上的OSD运行在哪些CPU上

代码

这里直接上代码了,最近学习python在,就用python来实现

#!/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:
        printosdcputable("process")
    elif sys.argv[1] == 't':
        printosdcputable("thread")

def printosdcputable(choose):
    print choose
    row = PrettyTable()
    row.header = True
    cpulist = ["OSD\CPU"]
    corelist=["Core ID"]
    phylist = ["Physical ID"]
    emplist=["-----------"]
    for cpupro in range(psutil.cpu_count()):
        cpulist.append("%s" %cpupro )

        coreid=commands.getoutput('egrep \'processor|physical id|core id\' /proc/cpuinfo | cut -d : -f 2 | paste - - -  | awk  \'$1==%s {print $3 }\'' %cpupro)
        corelist.append("%s" %coreid)

        phyid = commands.getoutput('egrep \'processor|physical id|core id\' /proc/cpuinfo | cut -d : -f 2 | paste - - -  | awk  \'$1==%s {print $2 }\'' % cpupro)
        phylist.append("%s" %phyid)
        emplist.append("--")

    row.field_names = cpulist
    row.add_row(corelist)
    row.add_row(phylist)
    row.add_row(emplist)

    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 osdcpu in range(psutil.cpu_count()):
                    osdlist.append(" ")
                    osdthlist.append("0")
                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_runcpu = commands.getoutput('ps -o  psr -p %s |grep -v PSR 2>/dev/null' %osdpid)
                th_list = commands.getoutput('ps -o  psr -L  -p %s |grep -v PSR|awk \'gsub(/^ *| *$/,"")\'  2>/dev/null' % osdpid)

                osdname="osd."+osdid
                osdlist[int(osd_runcpu)]="+"
                for osdth in th_list.split('\n'):
                    osdthlist[int(osdth)] = int(osdthlist[int(osdth)])+1
                osdlist.insert(0,osdname)
                osdthlist.insert(0,osdname)
                if choose == "process":
                    row.add_row(osdlist)
                elif choose == "thread":
                    row.add_row(osdthlist)
    print row

if __name__ == '__main__':
    main()

运行脚本:

watch python getosdcpu.py

或者监控线程

watch python getosdcpu.py t

运行效果如下:

/assets/images/blogimg/查询OSD运行在哪些cpu上/osdcpu.png

线程的情况

看上去确实有些CPU上面运行了多个OSD,这里不讨论CPU绑定的好坏,只是展示现象,具体有什么效果,是需要用数据取分析的,这个以后再看下

补充

如果你发现你运行的脚本没有结果,这个不是脚本的问题,是因为没有生成pid文件,在配置文件/etc/ceph/ceph.conf当中增加:

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

然后重启osd进程,检查生成了pid没有

ll /var/run/ceph/*.pid

变更记录

Why Who When
创建 武汉-运维-磨渣 2016-11-16
解决无pid 武汉-运维-磨渣 2017-02-21