python自动化运维学习笔记1- psutil系统性能信息模块

1、psutil系统性能信息模块

下载地址
https://pypi.python.org/packages/source/p/psutil/
安装

tar zxvf psutil-2.0.0.tar.gz

cd psutil-2.0.0

python setup.py install

1.1 - 获取内存

>>> import psutil

>>> mem=psutil.virtual_memory()

>>> mem.total,mem.used

(1050415104L, 159047680L)

>>> mem.free

891367424L

>>> psutil.swap_memory()                                   

sswap(total=2113921024L, used=0L, free=2113921024L, percent=0.0, sin=0, sout=0)

>>> 

1.2 - 获取cpu信息

>>> psutil.cpu_times()

scputimes(user=9.13, nice=0.05, system=7.04, idle=563.88, iowait=16.04, irq=0.06, softirq=0.75, steal=0.0)

获取cpu单项数据信息，user的cpu时间比

>>> psutil.cpu_times().user

9.14

获取cpu的逻辑个数和物理个数

>>> psutil.cpu_count()

1

>>> psutil.cpu_count(logical=False)

1.3 - 获取硬盘信息

获取磁盘完整信息

>>> psutil.disk_partitions()

[sdiskpart(device='/dev/mapper/VolGroup00-LogVol00', mountpoint='/', fstype='ext3', opts='rw'), sdiskpart(device='/dev/sda1', mountpoint='/boot', fstype='ext3', opts='rw')]

磁盘利用率

>>> psutil.disk_usage('/')

sdiskusage(total=29025366016, used=1982386176, free=25544777728, percent=6.8)

获取磁盘IO个数

>>> psutil.disk_io_counters(perdisk=True)

{'dm-1': sdiskio(read_count=112, write_count=0, read_bytes=458752, write_bytes=0, read_time=1253, write_time=0), 'sda2': sdiskio(read_count=3412, write_count=2354, read_bytes=71059968, write_bytes=20303872, read_time=20905, write_time=24267), 'dm-0': sdiskio(read_count=4259,
write_count=4957, read_bytes=70456320, write_bytes=20303872, read_time=23871, write_time=56374), 'sda1': sdiskio(read_count=274, write_count=2, read_bytes=1102848, write_bytes=2048, read_time=752, write_time=42)}

1.4 - 网络信息

>>> psutil.net_io_counters()  获取网络总的IO信息

snetio(bytes_sent=143241, bytes_recv=362052, packets_sent=1355, packets_recv=1575, errin=0, errout=0, dropin=0, dropout=0)

>>> psutil.net_io_counters(pernic=True)  获取每个网络接口的IO信息

{'sit0': snetio(bytes_sent=0, bytes_recv=0, packets_sent=0, packets_recv=0, errin=0, errout=0, dropin=0, dropout=0), 'lo': snetio(bytes_sent=11575, bytes_recv=11575, packets_sent=151, packets_recv=151, errin=0, errout=0, dropin=0, dropout=0), 'eth0': snetio(bytes_sent=135758,
bytes_recv=355793, packets_sent=1242, packets_recv=1485, errin=0, errout=0, dropin=0, dropout=0)}

>>> 

1.5 - 获取当前登录系统的用户信息

>>> psutil.users()

[suser(name='root', terminal='pts/0', host='182.168.8.2', started=1417608064.0)]

>>> 

1。6 - psutil.boot_time()获取开机时间，以linux时间戳格式返回，用datetime转换成自然格式

>>> import psutil,datetime

>>> psutil.boot_time()

1417607909.0

>>> datetime.datetime.fromtimestamp(psutil.boot_time()).strftime("%Y%m%d %H:%M:%S")

'20141203 19:58:29'

>>> 

1.7 - 进程管理

>>> psutil.pids()  列出所有进程PID

[1, 2, 3, 4, 5, 14, 18, 19, 185, 188, 190, 256, 257, 258, 259, 466, 495, 496, 499, 500, 505, 514, 525, 555, 588, 1367, 1925, 1926, 1949, 2120, 2328, 2341, 2344, 2358, 2394, 2395, 2405, 2416, 2425, 2442, 2516, 2522, 2575, 2588, 2604, 2629, 2643, 2644, 2650,
2651, 2652, 2653, 2654, 2655, 2709, 2711, 2761]

>>> p=psutil.Process(2522)   实例化一个Process对象

>>> p.name()     进程名字

'snmpmagt'

>>> p.exe()      进程bin路径

'/opt/bmc/Patrol3/Linux-2-6-x86-64-nptl/bin/snmpmagt'

>>> p.cwd()      进程工作目录绝对路径

'/opt/bmc/Patrol3/Linux-2-6-x86-64-nptl/bin'

>>> p.status()    进程状态

'sleeping'

>>> p.create_time()   进程创建时间，时间戳格式

1417607977.06

>>> p.uids()    进程uid信息

puids(real=500, effective=0, saved=0)

>>> p.gids()     进程gid信息

pgids(real=500, effective=500, saved=500)

>>> p.cpu_times()   进程cpu信息

pcputimes(user=0.0, system=0.0)

>>> p.cpu_affinity()  get进程cpu亲和度

[0]

>>> p.memory_percent()   进程内存利用率

0.1052840915737632

>>> p.memory_info()     进程内存rss、vms信息

pmem(rss=1105920, vms=34746368)

>>> p.io_counters()   进程IO信息

pio(read_count=37, write_count=0, read_bytes=176128, write_bytes=0)

>>> p.connections()   返回打开进程socket的namedutples列表

[pconn(fd=4, family=2, type=1, laddr=('0.0.0.0', 199), raddr=(), status='LISTEN'), pconn(fd=5, family=2, type=1, laddr=('182.168.8.131', 52549), raddr=('182.168.8.131', 199), status='ESTABLISHED'), pconn(fd=6, family=2, type=1, laddr=('182.168.8.131', 199),
raddr=('182.168.8.131', 52549), status='ESTABLISHED'), pconn(fd=7, family=2, type=1, laddr=('127.0.0.1', 199), raddr=('127.0.0.1', 44749), status='ESTABLISHED'), pconn(fd=3, family=2, type=2, laddr=('0.0.0.0', 8161), raddr=(), status='NONE')]

>>> p.num_threads()   进程开启的线程数

1

>>> 

1.8 - psutil提供popen类用于获取用户启动应用程序进程信息，以便跟踪程序的运行状态

>>> import  psutil

>>> from subprocess import PIPE

>>> p=psutil.Popen(["/usr/bin/python","-c","print('hello')"],stdout=PIPE)

>>> p.name()

'python'

>>> p.username()

'root'

>>> p.communicate()

('hello\n', None)