Use fabric to retrieve a bunch of files from a set of hosts each day.
However, one host started giving me the following error:
Fatal error: Host key for $MYHOST did not match pre-existing key! Server's
key was changed recently, or possible man-in-the-middle attack.
Underlying exception:
('$MYHOST', <paramiko.rsakey.RSAKey object at 0x13e36d0>,
<paramiko.rsakey.RSAKey object at 0x13e5490>)
(I changed the actual host name to $MYHOST).
I thought an admin had just re-IP'd the host. But I could ssh to it without a
warning-- how strange.
I removed the entry from my known_hosts file anyway. I verified I could shell
in. Then I ran fabric and got the same result.
I can get the result by executing something as simple as:
$ fab -H "$MYHOST" -- ls
The following short paramiko script seems to work, though:
#! /usr/bin/env python
import paramiko.client
c = paramiko.client.SSHClient()
c.load_system_host_keys()
c.connect("ldap6")
t = c.exec_command("ls")
print t[1].read()
c.close()
So I am not exactly sure where to look next. Has anyone run into this puzzling
behavior?
Thanks,
Carl Waldbieser
ITS System Programmer
Lafayette College
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