[savannah-help-public] [sr #109343] ssh known_hosts conflicts svn and git

[Gavin D. Smith]

URL:
  <http://savannah.gnu.org/support/?109343>

                 Summary: ssh known_hosts conflicts svn and git
                 Project: Savannah Administration
            Submitted by: gavin
            Submitted on: Mon 26 Jun 2017 06:24:01 PM UTC
                Category: Source code repositories - developer access
                Priority: 5 - Normal
                Severity: 3 - Normal
                  Status: None
             Assigned to: None
        Originator Email: 
        Operating System: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

When running "git pull" on a git repository on Savannah, I got an error
message

Warning: the ECDSA host key for 'git.sv.gnu.org' differs from the key for the
IP address '208.118.235.201'
Offending key for IP in /home/g/.ssh/known_hosts:26
Matching host key in /home/g/.ssh/known_hosts:23

Line 26 is 208.118.235.201 ssh-rsa
AAAAB3NzaC1yc2EAAAABIwAAAIEAzFQovi+67xa+wymRz9u3plx0ntQnELBoNU4SCl3RkwSFZkrZsRTC0fTpOKatQNs1r/BLFoVt21oVFwIXVevGQwB+Lf0Z+5w9qwVAQNu/YUAFHBPTqBze4wYK/gSWqQOLoj7rOhZk0xtAS6USqcfKdzMdRWgeuZ550P6gSzEHfv0=

If I go and remove that key from the known_hosts file, "git pull" then prints

Warning: Permanently added the ECDSA host key for IP address '208.118.235.201'
to the list of known hosts.

the first time. The line it adds to known_hosts is

208.118.235.201 ecdsa-sha2-nistp256
AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBP9c1Z2f4OHxymvLxqxQ/hY1g0ol0/iiXUrVFGZBBq4h5gD05c7Gw9rRrcrvF9XvumBvOghOQzDSZZLRWvFGocA=

On subsequent tries, it completes without error.

However, then when I try to update an SVN repository on Savannah with "svn
update" I get an warning:

$ svn update
Updating '.':
Warning: the RSA host key for 'svn.savannah.gnu.org' differs from the key for
the IP address '208.118.235.201'
Offending key for IP in /home/g/.ssh/known_hosts:26
Matching host key in /home/g/.ssh/known_hosts:4
Are you sure you want to continue connecting (yes/no)? 

It's complaining about the line that was just added by "git pull". It does
this every time svn runs.

How can I set it up so that both "svn update" and "git pull" work correctly,
without printing a warning or prompting for confirmation?




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