On 7 Jan 2019, at 16.02, Maciej Milaszewski IQ PL maciej.milaszewski@iq.pl wrote:

Hi I have two server directors in ring and 5 dovecot servers (2.2.36) IP for IMAP and POP3 is a VIP (keepalived)

What is the best solutions to get realy HA for 5 dovecot servers ? Maby corosync+pacemeker ? But this solution is too problematic and hardcore

Why I need HA ? Doveadmin is too lazy and doveadm director does not know that one machine broke down and still sends traffic

Dovecot is HA out of the box with shared storage and directors. Also you should check this for backend monitoring:

https://github.com/brandond/poolmon https://github.com/brandond/poolmon

Sam