On Feb 13, 2015, at 3:42 PM, FUSTE Emmanuel <emmanuel.fu...@thalesgroup.com>
wrote:
> Le 13/02/2015 16:19, Casey Stone a écrit :
>> On Feb 5, 2015, at 10:39 PM, Casey Stone <tcst...@caseystone.com> wrote:
>>
>>> Hello:
>>>
>>> I've been looking forward to getting my mail server up to Dovecot 2.2+ to
>>> be able to use the sync mechanism. I run my own mail server just for
>>> myself, with a few different accounts, and want to keep a master and backup
>>> server in sync.
>>>
>>> I'm running the Ubuntu server 14.04.1 mail stack which features Dovecot
>>> 2.2.9 (and Postfix). My setup is to use system users (userdb passwd /
>>> passdb pam) with ~/Maildir. I'll post full sanitized output of dovecot -n
>>> if it seems necessary. I have not enabled any plugins (do I need the
>>> replicator plugin active?) I have in my conf a doveadm_password defined.
>>>
>>> Anyway, after setting up an ssl listener on the main machine and after
>>> considerable struggles with SSL, I was able to run doveadm sync from the
>>> backup server successfully for a small mailbox (around 78 MB) with this
>>> command:
>>>
>>> doveadm sync -R tcps:mainserver.example.com:12345
>>>
>>> Since I run this command as the system user on the backup server (same
>>> system users as main server) it 'just works' for the correct single user
>>> with no further options required. My plan is to run a daily cron job to
>>> sync once daily for each user.
>>>
>>> The problem is when I try to sync a larger mailbox, say 1 GB, dsync-server
>>> on the remote (master) machine throws fatal error 83 Out of Memory. I
>>> already raised vsz_limit to 512 MB. Problems probably arise with mailboxes
>>> around 200 MB though I haven't tested specifically. So my question is, is
>>> this expected and I will need to give my VM much more memory to be able to
>>> use dovecot sync, or do I have something set wrong, or is it a bug?
>>>
>>> Thanks for your help.
>> No repsonses :-(
>>
>> Here is what it looks like when it crashes with an out of memory error:
>>
>> (start of the run)
>> Feb 13 14:02:38 thepost dovecot: doveadm(10.0.1.22,tcstone): Debug:
>> Effective uid=1002, gid=1002, home=/home/tcstone
>> Feb 13 14:02:38 thepost dovecot: doveadm(10.0.1.22,tcstone): Debug:
>> Namespace inbox: type=private, prefix=, sep=, inbox=yes, hidden=no, list$
>> Feb 13 14:02:38 thepost dovecot: doveadm(10.0.1.22,tcstone): Debug:
>> maildir++: root=/data/tcstone/Maildir, index=, indexpvt=, control=, inbo$
>> Feb 13 14:02:39 thepost dovecot: dsync-server(tcstone): Debug: Namespace :
>> Using permissions from /data/tcstone/Maildir: mode=0700 gid=defau$
>> Feb 13 14:02:39 thepost dovecot: dsync-server(tcstone): Debug: brain S: out
>> state=send_mailbox_tree changed=1
>>
>> <<<many, many more brain messages>>>
>>
>> (end of the run)
>> Feb 13 14:02:52 thepost dovecot: dsync-server(tcstone): Fatal:
>> pool_system_realloc(536870912): Out of memory
>> Feb 13 14:02:52 thepost dovecot: dsync-server(tcstone): Error: Raw
>> backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x5e271) [0x7f9d2056b271] ->
>> /usr/lib/dovecot/libdovecot.so.0(+0x5e34e) [0x7f9d2056b34e] ->
>> /usr/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f9d20526bf8] ->
>> /usr/lib/dovecot/libdovecot.so.0(+0x72d53) [0x7f9d2057fd53] ->
>> /usr/lib/dovecot/libdovecot.so.0(+0x7792a) [0x7f9d2058492a] ->
>> /usr/lib/dovecot/libdovecot.so.0(+0x77be6) [0x7f9d20584be6] ->
>> /usr/lib/dovecot/libdovecot.so.0(+0x78748) [0x7f9d20585748] ->
>> /usr/lib/dovecot/libdovecot.so.0(o_stream_sendv+0x8d) [0x7f9d20583d7d] ->
>> /usr/lib/dovecot/libdovecot.so.0(o_stream_send+0x1a) [0x7f9d20583e1a] ->
>> /usr/lib/dovecot/modules/libssl_iostream_openssl.so(+0x4c05)
>> [0x7f9d1f6a0c05] ->
>> /usr/lib/dovecot/modules/libssl_iostream_openssl.so(openssl_iostream_bio_sync+0x21)
>> [0x7f9d1f6a1881] ->
>> /usr/lib/dovecot/modules/libssl_iostream_openssl.so(+0x7a4d)
>> [0x7f9d1f6a3a4d] ->
>> /usr/lib/dovecot/modules/libssl_iostream_openssl.so(+0x7d69)
>> [0x7f9d1f6a3d69] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_sendv+0x8d)
>> [0x7f9d20583d7d] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_nsendv+0xf)
>> [0x7f9d20583e5f] -> /usr/lib/dovecot/libdovecot.so.0(o_stream_nsend+0x1a)
>> [0x7f9d20583e8a] -> dovecot/doveadm-server(+0x2b03f) [0x7f9d20d3003f] ->
>> dovecot/doveadm-server(+0x2c768) [0x7f9d20d31768] ->
>> dovecot/doveadm-server(dsync_ibc_send_mail+0x29) [0x7f9d20d2f309] ->
>> dovecot/doveadm-server(dsync_brain_sync_mails+0x5fc) [0x7f9d20d24a1c] ->
>> dovecot/doveadm-server(dsync_brain_run+0x523) [0x7f9d20d20f93] ->
>> dovecot/doveadm-server(+0x1c270) [0x7f9d20d21270] ->
>> dovecot/doveadm-server(+0x2de60) [0x7f9d20d32e60] ->
>> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x27) [0x7f9d2057b247] ->
>> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0xd7) [0x7f9d2057bfd7]
>> -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7f9d2057ade8] ->
>> dovecot/doveadm-server(+0x1a189) [0x7f9d20d1f189] ->
>> dovecot/doveadm-server(+0xebeb) [0x7f9d20d13beb]
>> Feb 13 14:02:52 thepost dovecot: dsync-server(tcstone): Fatal: master:
>> service(doveadm): child 13232 returned error 83 (Out of memory (service
>> doveadm { vsz_limit=512 MB }, you may need to increase it) - set
>> DEBUG_OUTOFMEM=1 environment to get core dump)
>>
>> I haven't tested whether it is simply the effect of having DEBUG active that
>> kills it... A run requiring moving just over 100 MB of mail is enough to
>> cause the error. I have tested manually copying the Maildir to the backup
>> server, then running the sync or backup command -- this works. Thus is seems
>> related not to the size of the mailbox but the size of the data that needs
>> to be copied.
> To use dsync, use Dovecot 2.2.15 to avoid any trouble.
> Use apt.dovecot.fi repository.
>
> Emmanuel.
At first I scoffed at this notion, preferring to stick with my distributions
own packaged versions, but then I realised that there is this 'enterprise
version' called dovecot-ee available, and now it even is free (previously
$99/year I guess). I registered for this and have a license and
username/password now, but it seems Ubuntu is only supported as of 12.04 not
14.04 that I am running.
I tried to add the repo changing 'precise' for 'trusty' but the repo did not
respond to that. Anyone know if it's safe to use 'precise' on a trusty server,
or if there is progress to create packages for trusty? Also, should I apt-get
remove dovecot-core etc before installing from the new repo?
By the way, the backup operations seem to be working now using doveadm backup
-u username -R tcps:mainserver.example.com:12345 if I do the 'seeding' of the
backup manually (by copying).
Thanks.
