On 3/14/2023 8:52 AM, Felix Natter wrote:

Dear subversion community,

I have setup an ALMA Linux 8 (~RH8) Server, to which I will migrate some
repositories from a Ubuntu 20.04 system. During the migration phase I would like to disable the svn (svn+ssh://) service temporarily on the Ubuntu 20.04
system.

Is there any easy way to do it? I would like to avoid modifying conf/* for
all of the ~100 repositories, making deep changes to the system and
shutting down the ssh service (because I need to pull the dumps to the new
system).

Later, I would also like to have this "maintenance mode" on the target ALMA8
system.

Do you have an idea?


You could move the "svnserve" command aside, that would block all svn+ssh access, but that could break a lot of other things, depending on your setup.

You could replace it with a shell wrapper which blocks access in certain situations, something like this:

if [ "$SSH_CONNECTION" -a -f /etc/BLACKOUT ]; then cat /etc/BLACKOUT; exit 1; fi

exec svnserve.real "$@"

So if they are coming in from SSH and you have a file called /etc/BLACKOUT that file would be sent to users (downtime notice). You might want to exempt the repository owner, so that any replication or migration efforts still work.

note: that script is off the top of my head, poorly written and untested; but it should give you the idea.

trent...


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