我正在尝试创建一个主代理脚本，其中主服务器从代理获取信息。信息，例如：
- 主机名用法
- CPU使用率
- 磁盘使用情况
- 内存使用量
我已将其放入返回数据的函数中。即将发送数据时，出现错误：
Traceback (most recent call last):
File "./agent.py",line 42,in <module>
send_data(out_data)
File "./agent.py",line 36,in send_data
with urllib.request.urlopen(req) as response :
File "/usr/lib64/python3.6/urllib/request.py",line 223,in urlopen
return opener.open(url,data,timeout)
File "/usr/lib64/python3.6/urllib/request.py",line 526,in open
response = self._open(req,data)
File "/usr/lib64/python3.6/urllib/request.py",line 544,in _open
'_open',req)
File "/usr/lib64/python3.6/urllib/request.py",line 504,in _call_chain
result = func(*args)
File "/usr/lib64/python3.6/urllib/request.py",line 1346,in http_open
return self.do_open(http.client.HTTPConnection,line 1320,in do_open
raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 113] No route to host>
我检查了两个VM之间是否存在连接。一个人的IP地址= 192.168.234.2（主服务器），其他人192.168.234.10（代理人）。代理的路由表显示routing table agent，这是两个ping
之间的ping
Agent.py
#!/bin/python3
##importeer onderstaande modules om deze te gebruiken##
import psutil
import socket
import time
import urllib.parse
import urllib.request
url = 'http://192.168.234.2/cgi-bin/master.py'
##de output van bovenstaande prints word geplaats in deze variabel om deze in onderstaande variabelen door te sturen##
#De dictionairys worden klaar gezet om gebruikt te worden
def save_data():
return {
'machine' : socket.gethostname(),'memory' : psutil.virtual_memory()[2],'disk' : psutil.disk_usage('/').percent,'cpu' : psutil.cpu_percent()
}
#De data wordt in de dictionairys gezet
def print_info(out_data):
print ("Het script heeft gedraaid op: ",time.strftime('%m/%d/%Y %H:%M:%S'))
print ('De naam van deze host machine is:',out_data['machine'])
print ('Het geheugen is ',out_data['memory'],'% in gebruik')
print ('De schijf is ',out_data['disk'],'% vol')
print ('Het CPU percentage dat in gebruik is: ',out_data['cpu'])
#de data wordt naar de master verzonden
def send_data(out_data):
data = urllib.parse.urlencode(out_data)
data = data.encode('ascii')
req = urllib.request.Request(url,data)
with urllib.request.urlopen(req) as response :
the_page = response.read()
out_data = save_data()
print_info(out_data)
send_data(out_data)
Master.py
#!/usr/bin/python3
###importeren van modules om deze vervolgens te kunnen gebruiken in het script###
import cgi,cgitb
import matplotlib.pyplot as plt
import io
import sqlite3
#maak een instance van een field storage
cgitb.enable()
form = cgi.FieldStorage()
#het verkrijgen van data van de velden die vanuit de agent worden opgestuurd.
def get_data():
system_data = {
"machine" : form.getvalue('machine'),"cpu": form.getvalue('cpu'),"mem": form.getvalue('mem'),"disk": form.getvalue('disk')}
return system_data
#print ("Content-type:text/html\n\n")
current_data = get_data()
con = sqlite3.connect('toets_school.db')
cursor = con.cursor()
cursor.execute("CREATE TABLE if NOT EXISTS gegevens ('machine',VARCHAR,'cpu' float,'mem' float,'disk' float)")
cursor.execute("INSERT INTO gegevens (machine,cpu,mem,disk) VALUES ('"+str(current_data["machine"])+"','"+str(current_data["cpu"])+"','"+str(current_data["mem"])+"','"+str(current_data["disk"])+"')")
cursor.execute("SELECT cpu,disk FROM gegevens WHERE machine = '"+str(current_data["machine"]+"'")
data = cursor.fetchall()
cpulijst = []
memlijst = []
disklijst = []
for info in data:
cpulijst.append(info[0])
memlijst.append(info[1])
disklijst.append(info[2])
#print(data)
con.commit()
get_data()
print (cpulijst)
def chart_cpu():
plt.plot(cpulijst)
plt.title("CPU gebruik")
plt.xlabel('minuten')
plt.ylabel('percentage(%)')
plt.grid(True)
plt.savefig("cpu.png")
plt.show()
def chart_memory():
plt.plot(memlijst)
plt.title("Geheugen")
plt.xlabel('minuten')
plt.ylabel('percentage (%)')
plt.grid(True)
plt.savefig("memory.png")
plt.show()
def chart_disk_usage():
plt.plot(disklijst)
plt.title("Schuifruimte")
plt.xlabel('minuten')
plt.ylabel('(%)in gebruik')
plt.grid(True)
plt.savefig("disk_usage.png")
plt.show()
chart_cpu()
chart_disk_usage()
chart_memory()
print ("Content-type:text/html\n\n")
print ("<center>")
print ('De naam van deze machine is :',machine)
print ("<br>")
print ("<html><head><title>Website HAF sportschool</title></head><body>")
print("<img src='data:image/png;base64,"+str(base64.b64encode(buf.getvalue()).decode('ascii'))+"' />")
print("<img src='data:image/png;base64,"+str(base64.b64encode(buf2.getvalue()).decode('ascii'))+"' />")
print ("</body></html>")
conn.close()
我希望代理将发送的信息存储在函数save_data中，并传递给out_data。并且数据将通过函数def send_data发送到主服务器。
编辑：在比尔·洪内克（Bill Huneke）的表扬之后，非常感谢。第一个问题已解决。使用Linux命令：
sudo firewall-cmd --add-service=http --permanent
sudo firewall-cmd --reload
我能够卷曲master.py。现在我的问题是，主服务器上的数据库仅被填充为“无”。
有人知道如何解决这个问题吗？