Re: [BackupPC-users] Using a jump host to backup via rsync over SSH

[Falko T. <ne...@tr...>]

Hello Pim,

>>> using jumphost here for backing up a remote host and it's VMs without 
>>> any problems. What BackupPC version do you use?
>> I am using BackupPC 4.3.1-3 from the yum repository for CentOS 7. Very 
>> good to hear that you got it working on your installation.
> 
> ok, so I'll try it on an 4.3.2 installation, too, and give you some 
> information if it works there.

working here without any clue as described. No changes in BackupPC 
configuration needed.

So, the differences seem to be:

* you're using sudo and a special backup user

* as your DumpPreUserCmd errors out, did you try without?

 > DumpPreUserCmd returned error status 65280... exiting
   *  what is this errorstatus from?
   *  does the backup work without DumpPreUserCmd?

May be this helps, too:

On Tue, 11 Jun 19, Adam Goryachev wrote:
 > Finally, the one single command I've found to be the *most* helpful in
 > debugging any such issues is this:
 >
 > /usr/lib/backuppc/bin/BackupPC_dump -f -vvv hostname
 >
 > Which will just try to do a full backup, but show you on the console
 > what it is doing through each step. You should make sure there is no
 > scheduled backup for this host, and no in-progress backup for this host
 > when you run this command. Under normal operation, you shouldn't use
 > this command.

(on Debian, this is in another location:
   /usr/share/backuppc/bin/BackupPC_dump
  don't know about CentOS)


 > Also, not trying to be cheeky here: for added security you don't
 > actually need AgentForwarding
Yes, you're right - this was an copy&paste leftover.

 > nor root logins when using a jump host.
Yes, you can use another user. Is it a normal sshd what you use for jump 
host, or something like sshportal or ssh-bastion?

There are different ways for ssh proxy/jump, too:
https://en.wikibooks.org/wiki/OpenSSH/Cookbook/Proxies_and_Jump_Hosts#Jump_Hosts_--_Passing_Through_a_Gateway_or_Two

Best regards,
Falko