[svlug] Rsync across SSH & alternatives

[James Sparenberg]

On 05/13/2010 12:35 PM, Skip Evans wrote:
> Oh, of course. I use sshfs all the time for connecting to client 
> servers I'm coding on.
>
> I think that would work well, but my real concern is going to be how 
> to monitor the connection and re-establish it should it drop out.
>
> Any ideas there?
>
> Skip
>
> James Sparenberg wrote:
>>
>>     Have you looked at using sshfs? 
>> http://fuse.sourceforge.net/sshfs.html This is a Fuse file system.  
>> Fully encrypted, and works like NFS without the stale file handles.
>>
>>      I've used it In similar situations where an HA system had an app 
>> that could come in from any of several servers, but needed to be able 
>> to continue to access the data as if it was always the same server.
>>
>>      It can be mounted and controlled by fstab, and a simple bash 
>> script can be setup to check every minute for a specific dot file, if 
>> it can't find it, then it remounts the mount.
>>
>>     One of the things I liked about SSHFS is that it carries with it 
>> the robust nature of an ssh connection, where line glyphs and packet 
>> loss don't cause it to disconnect in a bad way.
>>
>> James
>>
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>
what I had done was that I created a .file, then since the original box 
had this on an ext3/4 file system I did chattr +i on that .file.  Now 
even root cannot accidentally remove the file.

Next I wrote a simple bash script something like this.

#!/bin/bash

if [ -f /route/to/my/.file ]; then
          sleep 60
else
       mount -o remount /route/to/my/.file       # syntax requires an 
fstab entry
       mail -s "I recreated the mount"  me at myaddy.com <.
fi

I then ran that script as a daemon and anytime it had to remount it did.