如何使用paramiko無密碼連接到遠程服務器？

Question

我在Python中編寫腳本，需要使用SSH連接到remote_server，並將file從remote_server移動到host_server。我需要在沒有密碼的情況下執行它，因爲它需要適用於任何遠程服務器和任何主機服務器用戶。

我的代碼：

#get IP and username for remote access 
IP = input("Enter host_server IP: ").split() 
username = input("Enter username: ").split() 
#password = ??????? 

#create a file on host_server for file 
file_a = open(date+"file.txt", "a") #ignore the date variable 
file = str(date+"file.txt") 

#move file to host_server 
import paramiko 
ssh = paramiko.SSHClient() 
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) 
ssh.connect(IP[0], username = user[0], password = password[0]) 
print "Connected to server." 
transfer = ssh.open_sftp() 
transfer.get("file.txt", file) 
transfer.close() 
print "Transfer completed." 

問：有沒有辦法來設置腳本內的公共密鑰，而無需訪問一個命令行終端，這樣每次腳本運行時，它會設置密碼的使用SSH訪問？

Answer 1

ssh.connect()需要一個關鍵字參數pkey，您可以使用它來指定您的私人文件。

#get IP and username for remote access 
IP = input("Enter host_server IP: ").split() 
username = input("Enter username: ").split() 


#create a file on host_server for file 
file_a = open(date+"file.txt", "a") #ignore the date variable 
file = str(date+"file.txt") 
import paramiko 
import os 
privatekeyfile = os.path.expanduser('~/.ssh/id_rsa') 
mykey = paramiko.RSAKey.from_private_key_file(privatekeyfile) 
ssh.connect(IP[0], username = user[0], pkey = mykey)