private_key_path = '/Users/xxx/.ssh/id_rsa'
rsaKey = paramiko.RSAKey.from_private_key_file(private_key_path)

ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(跳板机或者内网服务器IP或者域名, 22, username, rsaKey)
stdin, stdout, stderr = ssh.exec_command('redis-cli -h {} -p {} -n {} {}'.format(host, port, db, script))
result = stdout.read(), stderr.read()
for out in result: # 需要通过循环拿到stdout，否则为空值
  if out:
    return out

import paramiko
from sshtunnel import SSHTunnelForwarder

with SSHTunnelForwarder(
  (REMOTE_SERVER_IP, 443),
  ssh_username="",
  ssh_pkey="/var/ssh/rsa_key",
  ssh_private_key_password="secret",
  remote_bind_address=(PRIVATE_SERVER_IP, 22),
  local_bind_address=('0.0.0.0', 10022)
) as tunnel:
  client = paramiko.SSHClient()
  client.load_system_host_keys()
  client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
  client.connect('127.0.0.1', 10022)
  # do some operations with client session
  client.close()

print('FINISH!')

# 使用SSHTunnelForwarder隧道，通过跳板机链接Redis
with SSHTunnelForwarder(
    ('xxx.xxx.xx.xx', 22), # 跳板机
    ssh_username=username,
    ssh_pkey="/Users/xxx/.ssh/id_rsa",
    remote_bind_address=('xx.xx.xx.xxx', 6379), # 远程的Redis服务器
    local_bind_address=('0.0.0.0', 10022) # 开启本地转发端口
) as server:
  server.start() # 开启隧道
  print(server.local_bind_port)
  # 本地通过local_bind_port端口转发，利用跳板机，链接Redis服务
  cls.red = redis.Redis(host='127.0.0.1', port=server.local_bind_port, db=db, decode_responses=True)
  server.close() # 关闭隧道