我在做我自己的项目。其中必须执行以下步骤:
到目前为止,我已经完成了第二步。现在我想知道如何从远程服务器中提取pid、进程名、cpu使用率、交换内存使用率,并将其存储在某个iterable变量中。这样我就可以比较它来检查记忆尖峰? 除了我的想法之外,任何其他的方法都是值得赞赏的。 我的代码示例如下:
import paramiko
import re
import psutil
class ShellHandler:
def __init__(self, host, user, psw):
self.ssh = paramiko.SSHClient()
self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
self.ssh.connect(host, username=user, password=psw, port=22)
channel = self.ssh.invoke_shell()
self.stdin = channel.makefile('wb')
self.stdout = channel.makefile('r')
def __del__(self):
self.ssh.close()
@staticmethod
def _print_exec_out(cmd, out_buf, err_buf, exit_status):
print('command executed: {}'.format(cmd))
print('STDOUT:')
for line in out_buf:
print(line, end="")
print('end of STDOUT')
print('STDERR:')
for line in err_buf:
print(line, end="")
print('end of STDERR')
print('finished with exit status: {}'.format(exit_status))
print('------------------------------------')
#print(psutil.pids())
pass
def execute(self, cmd):
"""
:param cmd: the command to be executed on the remote computer
:examples: execute('ls')
execute('finger')
execute('cd folder_name')
"""
cmd = cmd.strip('\n')
self.stdin.write(cmd + '\n')
finish = 'end of stdOUT buffer. finished with exit status'
echo_cmd = 'echo {} $?'.format(finish)
self.stdin.write(echo_cmd + '\n')
shin = self.stdin
self.stdin.flush()
shout = []
sherr = []
exit_status = 0
for line in self.stdout:
if str(line).startswith(cmd) or str(line).startswith(echo_cmd):
# up for now filled with shell junk from stdin
shout = []
elif str(line).startswith(finish):
# our finish command ends with the exit status
exit_status = int(str(line).rsplit(maxsplit=1)[1])
if exit_status:
# stderr is combined with stdout.
# thus, swap sherr with shout in a case of failure.
sherr = shout
shout = []
break
else:
# get rid of 'coloring and formatting' special characters
shout.append(re.compile(r'(\x9B|\x1B\[)[0-?]*[ -/]*[@-~]').sub('', line).replace('\b', '').replace('\r', ''))
# first and last lines of shout/sherr contain a prompt
if shout and echo_cmd in shout[-1]:
shout.pop()
if shout and cmd in shout[0]:
shout.pop(0)
if sherr and echo_cmd in sherr[-1]:
sherr.pop()
if sherr and cmd in sherr[0]:
sherr.pop(0)
self._print_exec_out(cmd=cmd, out_buf=shout, err_buf=sherr, exit_status=exit_status)
return shin, shout, sherr
obj=ShellHandler('Servername','username','password')
pID=[]
## I want this(pid, cmd, swap memory) to store in a varible which would be iterable.
pID=ShellHandler.execute(obj,"ps -eo pid,cmd,lstart,%mem,%cpu|awk '{print $1}'")
print(pID[0])##---------------------------------Problem not giving any output.
ps aux
命令应该包含您需要的所有信息(pid、进程名、cpu、内存)您的
ShellHandler
的execute
方法返回三项,第一项是您发送给它的输入。你知道吗无论如何,你应该直接这样称呼它:
我最后移动了
cmd
,因为它可能包含空格。lstart
值还包含多个空格分隔的字段。Debian的输出如下:关于如何更详细地解析
ps
输出有许多问题;我将向您介绍如何准确地处理来自split
的结果。你知道吗相关问题 更多 >
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