Hello again,
After taking more time trying to undestand the output of `doveadm sync
-s`, i found out that the comamnd is unusable when called for multiple
users (using -A, -F, or -u <regex> options).
I found several issues:
- The command output a state for every user. This makes sense, however
it's not possible to pass all these states and the corresponding user to
the command as an input, so running on multiple users probably should be
disabled or at least show a warning.
- every username and a new line *but the first one* is printed on stdout
*before* the state. This is very confusing as on stdout, each state is
printed next to the next username. I dug the source code trying to
understand why the first user is not printed but haven't found why.
To give an example: currently, the output of `doveadm sync -A -s ""
<destination>` gives the following output:
```
base64-alice-state b...@example.com
base64-bob-state char...@example.com
base64-charlie-state
```
As a workaround, i'll first list users using `doveadm user` and then do
multiple calls to `doveadm sync` in a script.
Best regards,
Bruno MATEU
On 2025-01-30 13:49, Bruno MATEU wrote:
Hello,
With the removal of the replication plugin in next releases, i'm trying
to setup automatic synchronization using doveadm sync between my master
and my replica.
I managed to make the full sync work from my replica using the
following comamnd `sync -A -N -R -f tcp:master-fqdn:12345`
However i'd like to do stateful synchronization to avoid doing the full
replication each time, and i haven't managed to do that.
I tried the following: `doveadm sync -A -N -R -s
"$(</var/lib/dovecot/sync-state)" tcp:master-fqdn:12345 >
/var/lib/dovecot/sync-state`. However this output a `doveadm(username):
Error: Saved sync state is invalid, falling back to full sync: Invalid
base64 data` for every user.
After looking at the state in /var/lib/dovecot/sync-state, i noticed
that there is one line for every user with an associated state, plus
one line with only a state. For some reason, the state is the same for
every user, except one where the state is much longer.
Do i need to run the command for each user, and give as an argument the
corresponding state ? Is it enough to run the doveadm sync command with
-A argument if i give the state in the last line outputted by doveadm
sync ? Is this the right way to do it ?
Best regards,
Bruno MATEU
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