Date: Mon, 29 Dec 2008 19:38:50 -0800 From: Noah <admin2@enabled.com> To: Mel <fbsd.questions@rachie.is-a-geek.net> Cc: freebsd-questions@freebsd.org Subject: Re: restart rsync process via shell script Message-ID: <495997CA.9050708@enabled.com> In-Reply-To: <200812291439.27877.fbsd.questions@rachie.is-a-geek.net> References: <4959509A.2060506@enabled.com> <200812291439.27877.fbsd.questions@rachie.is-a-geek.net>
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Mel wrote:
> On Monday 29 December 2008 13:35:06 Noah wrote:
>> Hi there,
>>
>> I am trying to figure out the most accurate way to assess if an rsync
>> process is running and is established to the remote rsync server and is
>> transferring data. I am writing a bourne shell script to restart rsync
>> if the connection to the remote rsync server is lost.
>>
>> The command "ps ax | grep 'rsync' | grep -v grep" is not enough because
>> the rsync and ssh process can be running but the connection to the
>> remote server is no longer ESTABLISHED and the backup is no longer
>> proceeding.
>>
>> Then perhaps the command "netstat -A | grep '192.168.1.10' | grep
>> 'ESTABLISHED' | grep -v grep" would be helpful. But in some cases I
>> have found that I have ssh connections to the remote rsync server that
>> obfuscate the rsync ssh ESTABLISH statistics.
>>
>> the rsync command I am using is: "/usr/bin/rsync -avz '/Users/noah/' -e
>> 'ssh -p 22' root@192.168.1.10:/Users"
>>
>> Any suggestions please?
>
> Set ServerAliveInterval to a low value so the connection is dropped. You can
> do this on the commandline using -e 'ssh -o ServerAliveInterval=10 -p 22'.
> This would drop the connection if the server can't be reached within 10
> seconds.
> Once the connection is dropped, rsync should exit with a value other then 0,
> so you can wrap your rsync command in a while loop, like:
>
> KEEP_RUNNING=1
> while test ${KEEP_RUNNING} -gt 0; do
> rsync -avz /Users/noah/ -e 'ssh -p 22 -o ServerAliveInterval=10' \
> root@192.168.1.10:/Users
> KEEP_RUNNING=$?
> done
>
I like that - thanks!
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