rsync fails with host key error in weewx, not from command line

[Chris Richmond]

Hi,

   I'm not new to ssh and all, but this one doesn't make sense. I'm messing around with

getting a set of hardware together for a move, and in the process ended up with rsync

errors because of host keys.  So... I removed the hostkey on the weewx end and was

able to ssh without a password to the NAS.  Still got the error, so checked the reverse

direction, which also had a problem, so corrected that.  Rechecked both directions this

morning (by hand) and no problems. *Still* weewx is failing rsync because of host key

errors.  Any more ideas.

pivue:~> sudo grep rsync /var/log/syslog | tail

Aug 21 06:25:16 pivue weewx[9927]: rsyncupload: [['rsync', '--archive', '--stats', '-e ssh', '/home/weewx/public_html/', 'weewx<at>filer2.csrhome.home:/volume1/web/vueweather']] reported errors: Host key verification failed.. rsync: connection unexpectedly closed (0 bytes received so far) [sender]. rsync error: error in rsync protocol data stream (code 12) at io.c(235) [sender=3.1.2]

Aug 21 06:25:16 pivue weewx[9927]: rsyncupload: rsync executed in 0.30 seconds

pivue:~> ssh filer2

weewx@filer2:~$ ssh pivue.csrhome.home

Linux pivue 4.19.42+ #1219 Tue May 14 21:16:38 BST 2019 armv6l

Last login: Wed Aug 21 06:25:40 2019 from 192.168.2.250

pivue:~> 

Thx, Chris

[Graham Eddy]

is it same user running ssh manually as weewx runs as?

____________

Graham Eddy

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[Chris Richmond]

Yes.  weewx in this case.  Apparently, filer2 and filer2.csrhome.home end up with separate hostkeys

in known_hosts.  copy/paste of the exact rsync command also prompted to accept the hostkey for

filer2.csrhome.home.  Learn something new everyday.

I'll have to wait until later to see if weewx is successful next time (rsync 3x/day for now).

Chris

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[vince]

On Wednesday, August 21, 2019 at 6:59:56 AM UTC-7, Chris Richmond wrote:

copy/paste of the exact rsync command also prompted to accept the hostkey for

filer2.csrhome.home.

That's the issue.  The remote host key changed 'or' you generated a new ~/.ssh/known_hosts file so it's prompting you for whether you trust the remote system is indeed the host it claims to be.

[Anthony Fandino]

Chris,

    Understand that weewx runs as root. host key and id must be in the root/.ssh/

hope that helps

Tony

[Chris Richmond]

Hi Tony,

  I've set things up (udev, specify pid file path) so I don't have to run as root.  Vince, what changed was the FQDN of the filer (changed domain names),

so that was the issue.  It's a bit of a learning experience to have two local domains.  As an aside, I've got <2 weeks to figure out how

to VPN between them so I can see either end once they aren't literally within 3ft of my chair and don't share the same ISP connection.

The wan ports are on the same domain (ISP's router ports), and each router (yet more linux boxes) has it's own local domain.

In the meantime, I'm pushing stuff from both sides to an external web service, which is what this is related to.

Thx, Chris