On 15/03/2021 20:54 Paterakis E. Ioannis jpat@uoc.gr wrote:
On 15/3/2021 6:09 μ.μ., Steven Varco wrote:
Hi John
Thanks for you input.
So you basically state that („physically“) separating the director servers from keepalive/haproxy servers is the only option? I would like to avoid setting up two additional machines for that whenever possible, as any node more in the chain potentially is another point of failure… ;)
Nope, it's not the only option. You can always have all three daemons (keepalived/haproxy/director) on each machine. Keepalived will handle the floating ip job, haproxies will have no problems with the floating ip, the directors will always be binded to the static ips of the machines and have their setup in the haproxies. That's all.
But, if you plan to make a Highly available environment, u have to consider splitting your services to different VMs, and them to different hypervisors in order to be as Highly available as you can....
John
The point of dovecot director is that it acts as a proxy that always routes users to same backend. You can use keepalived, if it supports external commands, to maybe tell director which backends are up / down.
You should have separate server for director(s) and each backend.
Aki