[....short answer...]
There is nothing special. It is ssh-101. You need passwordless ssh set up
as a prerequisite for rsync-over-ssh to work. Nothing weewx-specific at
all there.
[...longer answer...]
Simplest test is to ssh into the remote host using the private key of the
user you want weewx to rsync as. The incantation should be
"ssh -i /var/www/weewx/.ssh/weewx_account_private_key_filename_here
my.host.com date"
to try to ssh in and run the date command on the far side, possibly adding
the -v switch to provide more debugging if it doesn't work right away.
(obviously edit in your actual filename and remote hostname or ip address
above)
I don't run the apt variant, so if you run this as other than user 'weewx'
you should (should) get a permission denied even trying to read the weewx
user's private key as any other non-privileged user. If you run "sudo
bash" to open a root shell first and 'then' the test above, it should work
hopefully if your keys are set up correctly in weewx's .ssh tree. You'll
likely get a prompt asking you to accept the remote side's host key into
that .ssh tree's known_hosts file.
I don't remember what weewx's rsync defaults are but I personally always
fully specify everything just to be sure I know what it's going to do
rather than relying on app defaults.
So from weewx.conf:
# If you wish to use rsync, set "enable" to "true", then
# fill out server, user, and path.
# The server should appear in your .ssh/config file.
Meaning.....you might need a /var/lib/weewx/.ssh/config file entry for your
remote system.
Mine looks like the following, FWIW:
Host myhostname.domain.com nnn.nnn.nnn.nnn <= edit
IdentityFile ~/.ssh/my_private_key_filename <= edit
user remote_user_on_server <= edit
hostname nnn.nnn.nnn.nnn <= edit
I put the FQDN and ip addresses in there mainly for historical reasons and
use the ip address in weewx.conf so I don't need to rely on DNS working.
[[RSYNC]]
delete = 0
skin = Rsync
enable = true
server = nnn.nnn.nnn.nnn <= edit (ip
address or FQDN here)
user = remote_user_on_server <= edit
path = /server_side/full/path/to/rsync/into <= edit
log_success = false
log_failure = true
Hope this helps. Basically if you can ssh in as the weewx user using "its"
private key you specified in its .ssh/config file, rsync should work too.
On Tuesday, May 13, 2025 at 3:47:48 PM UTC-7 Shane Burkhardt wrote:
> I apologize if similar questions have been posted before, but I have not
> found anything recent and am really banging my head against the wall. I
> have rsync set-up but it still prompts for passwords for weewx or root
> users, although the key pair works fine for me as user. I have run keygen
> as weewx and as root. It looks like it saves root in the /root/.ssh
> directory but it saves weewx in the /var/lib/weewx/.ssh directory. I have
> copied the relevant public keys to the authorized keys file for the user on
> the remote server I am connecting to. Still no luck. I saw very old
> postings about a config file, but cannot figure out what that is or find
> recent documentation of what that might be or where that should go.
>
> Any help would be much appreciated!
>
> I am running weewx on Ubuntu 24.02.02 VM installed via APT. It is using
> the weewx user to run. My weather station is a WS5000-IP connected through
> the GX1000 driver. The Weewx version is 5.10.
>
> Here is a snippet from the log:
> May 13 15:00:23 asok weewxd[81319]: ERROR weeutil.rsyncupload: rsync
> reported errors. Original command: ['rsync', '--archive', '--stats', '-e',
> 'ssh', '/var/www/weewx>
> May 13 15:00:23 asok weewxd[81319]: ERROR weeutil.rsyncupload: ****
> Permission denied, please try again.
> May 13 15:00:23 asok weewxd[81319]: ERROR weeutil.rsyncupload: ****
> Permission denied, please try again.
> May 13 15:00:23 asok weewxd[81319]: ERROR weeutil.rsyncupload: ****
> [email protected]: Permission denied (publickey,password).
> May 13 15:00:23 asok weewxd[81319]: ERROR weeutil.rsyncupload: **** rsync:
> connection unexpectedly closed (0 bytes received so far) [sender]
> May 13 15:00:23 asok weewxd[81319]: ERROR weeutil.rsyncupload: **** rsync
> error: unexplained error (code 255) at io.c(232) [sender=3.2.7]
> May 13 15:00:25 asok weewxd[81319]: DEBUG user.gw1000: Next update in 5
> seconds
>
>
>
>
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