Re: Migration from one server to 2 new servers

Hi,

the idea was to run it on the new server and not on the old server. That is also why you should use -R parameter to pull the mails from remote, not push.

Sami

On 27. Jul 2020, at 17.13, Kishore Potnuru kishore.reachme@gmail.com wrote:

I tried this command also. It didn't work. It shows syntax again. Please see the supported commands in dovecot 2.0.9 version. This doesn't support replication also as per syntax, if i am not wrong. Please suggest me.

[root@production ~]# doveadm backup -u kishore@test.org.com mailto:kishore@test.org.com remote:vmail@production2.test.org.com mailto:remote%3Avmail@production2.test.org.com usage: doveadm [-Dv] [-f <formatter>] <command> [<args>]

altmove [-u <user>|-A] [-S ] <search query> auth [-a <auth socket path>] [-x <auth info>] <user> [<password>] config [doveconf parameters] director add|flush|map|remove|status dump [-t <type>] <path> expunge [-u <user>|-A] [-S ] <search query> fetch [-u <user>|-A] [-S ] <fields> <search query> force-resync [-u <user>|-A] [-S ] <mailbox> help <cmd> import [-u <user>|-A] [-S ] <source mail location> <dest parent mailbox> <search query> kick [-a <anvil socket path>] [-f] <user mask>[|] log find|reopen|test mailbox create|delete|list|mutf7|rename|status|subscribe|unsubscribe penalty [-a <anvil socket path>] [] purge [-u <user>|-A] [-S ] pw [-l] [-p plaintext] [-r rounds] [-s scheme] [-u user] [-V] reload search [-u <user>|-A] [-S ] <search query> sis deduplicate|find stop user [-a <userdb socket path>] [-x <auth info>] <user mask> [...] who [-a <anvil socket path>] [-1] [<user mask>] []

On Mon, Jul 27, 2020 at 2:22 PM Admin dishaw.org http://dishaw.org/ mailto:admin@dishaw.org> wrote:

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On Jul 27, 2020, at 4:59 AM, Kishore Potnuru mailto:kishore.reachme@gmail.com> wrote:

Hi

I am in the process/planning of moving from my existing dovecot imap/pop3 server to 2 new servers (for HA/Resilience). I will be implementing dovecot replication on new servers. Please find my current and new servers versions.

I recently did a similar move

...

What is the best way to stop/copy/migrate the current production data to the new servers? I am planning the following steps. Not sure if it is correct or not.

Step 0.

Setup replication and have mail replicate from the old servers to the new servers.

...

1. Stop the Postfix services on the old server and wait for few mins. So that no new emails will be coming to the old servers. Existing emails will be delivered to the receipients.

I stopped Postfix on the old servers and did not start Postfix on the new servers. I waited until I saw that no mail was replicating from the old Dovecot to the new servers.

...

2. copy/migrate the data from old server to new servers. Please suggest what is the best way?

Using the replication mechanism was the best method for me.