Re: [EXT] Replication going away?
Does anyone already have a dovecot (CE with Maildir) setup running using shared storage (i.ex. GlusterFS) underneath? This will be my current „migration plan“ to dovecot nmot supporting replication anymore: 2 x Loadblancers (accross two sites) with keepalived and haproxy 3x GlusterFS nodes 3x Galera Cluster mariadb nodes 2x dovecot IMAP with Postfix SMTP (wihout director there’s no need anynmore to use dovecot SMTP implementation) The Loadbalancer-, Galera- and Gluster modes are shared wit the existing web service infrastructure, so not dedicated to dovecot. So basically, this way I will not have to deploy a single node more without director/repication. If the HA storage and database clusters will be used for mail dedicated, this makes 11 nodes for a fully HA cluster accross two sites. With virtualization infrastructure that should get very expensive. Or am I missing something? Steven -- https://steven.varco.ch/ https://www.tech-island.com/ > Am 18.11.2023 um 18:10 schrieb Dean Carpenter : > > On 2023-07-20 5:31 pm, deano-dove...@areyes.com wrote: > On 2023-07-19 4:08 pm, Gerald Galster wrote: > A 50-100 mailbox user server > will run Dovecot CE just > fine. Pro would be overkill. >What is overkill? I always thought it >had a bit more features and support. > For Pro 2.3, you need (at minimum) 7 Dovecot > nodes + HA authentication + HA storage + > (minimum) 3 Cassandra nodes if using object > storage. This is per site; most of our customers > require data center redundancy as well, so > multiply as needed. And this is only email > retrieval; this doesn't even begin to touch upon > email transfer. Email high availability isn't > cheap. (I would argue that if you truly need this > sort of carrier-grade HA for 50 users, it makes > much more sense to use email as-a-service than > trying to do it yourself these days. Unless you > have very specific reasons and a ton of cash.) > High availability currently is cheap with a small two > server setup: > You need 3 servers or virtual machines: dovecot (and maybe > postfix) running on two of them and mysql galera on all > three. > This provides very affordable active/active geo-redundancy. > > No offence, it's just a pity to see that feature > disappering. > That's exactly how my own 3-node personal setup works. I shove all I > can into mariadb with galera (dovecot auth, spamassassin, etc) across > the 3 nodes. Dovecot replication keeps the 2 dovecot instances in > sync, the 3rd node is the quorum node for galera. > This is is on 3 cheap VPS' in 3 locations around the US. Mesh VPN > between them for the encrypted connectivity. It works, and it works > well. > And now replication is going away ? A perfectly-well working feature > is being removed ?? It's not as if it's a problematic one, nor would > it interfere with anything if it remained ... > I only see a couple of routes forward, at least for me. > * Stay on the last dovecot release that supports replication. > * Switch away from dovecot and cobble something else together. > * Move to gmail > The removal of replication feels very arbitrary. > At what version is replication being removed ? 2.4 I think ? Or, perhaps the > question is which is the last version that WILL still have replication ? > For now I'll be going with option 1 above, staying with the last version to > support it. Sad. > ___ > dovecot mailing list -- dovecot@dovecot.org > To unsubscribe send an email to dovecot-le...@dovecot.org ___ dovecot mailing list -- dovecot@dovecot.org To unsubscribe send an email to dovecot-le...@dovecot.org
Re: [EXT] Replication going away?
On 2023-07-20 5:31 pm, deano-dove...@areyes.com wrote: On 2023-07-19 4:08 pm, Gerald Galster wrote: A 50-100 mailbox user server will run Dovecot CE just fine. Pro would be overkill. What is overkill? I always thought it had a bit more features and support. For Pro 2.3, you need (at minimum) 7 Dovecot nodes + HA authentication + HA storage + (minimum) 3 Cassandra nodes if using object storage. This is per site; most of our customers require data center redundancy as well, so multiply as needed. And this is only email retrieval; this doesn't even begin to touch upon email transfer. Email high availability isn't cheap. (I would argue that if you truly need this sort of carrier-grade HA for 50 users, it makes much more sense to use email as-a-service than trying to do it yourself these days. Unless you have very specific reasons and a ton of cash.) High availability currently is cheap with a small two server setup: You need 3 servers or virtual machines: dovecot (and maybe postfix) running on two of them and mysql galera on all three. This provides very affordable active/active geo-redundancy. No offence, it's just a pity to see that feature disappering. That's exactly how my own 3-node personal setup works. I shove all I can into mariadb with galera (dovecot auth, spamassassin, etc) across the 3 nodes. Dovecot replication keeps the 2 dovecot instances in sync, the 3rd node is the quorum node for galera. This is is on 3 cheap VPS' in 3 locations around the US. Mesh VPN between them for the encrypted connectivity. It works, and it works well. And now replication is going away ? A perfectly-well working feature is being removed ?? It's not as if it's a problematic one, nor would it interfere with anything if it remained ... I only see a couple of routes forward, at least for me. * Stay on the last dovecot release that supports replication. * Switch away from dovecot and cobble something else together. * Move to gmail The removal of replication feels very arbitrary. At what version is replication being removed ? 2.4 I think ? Or, perhaps the question is which is the last version that WILL still have replication ? For now I'll be going with option 1 above, staying with the last version to support it. Sad. ___ dovecot mailing list -- dovecot@dovecot.org To unsubscribe send an email to dovecot-le...@dovecot.org
Re: [EXT] Replication going away?
On 2023-07-19 4:08 pm, Gerald Galster wrote: > A 50-100 mailbox user server will run Dovecot CE just fine. Pro would be > overkill. What is overkill? I always thought it had a bit more features and > support. For Pro 2.3, you need (at minimum) 7 Dovecot nodes + HA authentication + HA storage + (minimum) 3 Cassandra nodes if using object storage. This is per site; most of our customers require data center redundancy as well, so multiply as needed. And this is only email retrieval; this doesn't even begin to touch upon email transfer. Email high availability isn't cheap. (I would argue that if you truly need this sort of carrier-grade HA for 50 users, it makes much more sense to use email as-a-service than trying to do it yourself these days. Unless you have very specific reasons and a ton of cash.) High availability currently is cheap with a small two server setup: You need 3 servers or virtual machines: dovecot (and maybe postfix) running on two of them and mysql galera on all three. This provides very affordable active/active geo-redundancy. No offence, it's just a pity to see that feature disappering. That's exactly how my own 3-node personal setup works. I shove all I can into mariadb with galera (dovecot auth, spamassassin, etc) across the 3 nodes. Dovecot replication keeps the 2 dovecot instances in sync, the 3rd node is the quorum node for galera. This is is on 3 cheap VPS' in 3 locations around the US. Mesh VPN between them for the encrypted connectivity. It works, and it works well. And now replication is going away ? A perfectly-well working feature is being removed ?? It's not as if it's a problematic one, nor would it interfere with anything if it remained ... I only see a couple of routes forward, at least for me. * Stay on the last dovecot release that supports replication. * Switch away from dovecot and cobble something else together. * Move to gmail The removal of replication feels very arbitrary. ___ dovecot mailing list -- dovecot@dovecot.org To unsubscribe send an email to dovecot-le...@dovecot.org
Re: [EXT] Replication going away?
Le 19/07/2023 à 22:08, Gerald Galster a écrit : A 50-100 mailbox user server will run Dovecot CE just fine. Pro would be overkill. What is overkill? I always thought it had a bit more features and support. For Pro 2.3, you need (at minimum) 7 Dovecot nodes + HA authentication + HA storage + (minimum) 3 Cassandra nodes if using object storage. This is per site; most of our customers require data center redundancy as well, so multiply as needed. And this is only email retrieval; this doesn't even begin to touch upon email transfer. Email high availability isn't cheap. (I would argue that if you truly need this sort of carrier-grade HA for 50 users, it makes much more sense to use email as-a-service than trying to do it yourself these days. Unless you have very specific reasons and a ton of cash.) High availability currently is cheap with a small two server setup: You need 3 servers or virtual machines: dovecot (and maybe postfix) running on two of them and mysql galera on all three. This provides very affordable active/active geo-redundancy. No offence, it's just a pity to see that feature disappering. Could not say more : all my past setups were like this. With postgres or openldap instead of mysql. It was a feature I waited for years and heavy used for last ten years. Big complicated shared storage was NEVER needed or suitable alone in all my encountered scenario. And in case of active/active Geo, even with shared storage, the geo replication was entrusted to dovecot and not to the underlying storage for efficiency and consistency purpose. Emmanuel. ___ dovecot mailing list -- dovecot@dovecot.org To unsubscribe send an email to dovecot-le...@dovecot.org
Re: [EXT] Replication going away?
>>> A 50-100 mailbox user server will run Dovecot CE just fine. Pro would >>> be overkill. >> >> What is overkill? I always thought it had a bit more features and support. > > For Pro 2.3, you need (at minimum) 7 Dovecot nodes + HA authentication + HA > storage + (minimum) 3 Cassandra nodes if using object storage. This is per > site; most of our customers require data center redundancy as well, so > multiply as needed. And this is only email retrieval; this doesn't even > begin to touch upon email transfer. > > Email high availability isn't cheap. (I would argue that if you truly need > this sort of carrier-grade HA for 50 users, it makes much more sense to use > email as-a-service than trying to do it yourself these days. Unless you have > very specific reasons and a ton of cash.) High availability currently is cheap with a small two server setup: You need 3 servers or virtual machines: dovecot (and maybe postfix) running on two of them and mysql galera on all three. This provides very affordable active/active geo-redundancy. No offence, it's just a pity to see that feature disappering. Best regards, Gerald ___ dovecot mailing list -- dovecot@dovecot.org To unsubscribe send an email to dovecot-le...@dovecot.org
