use the mail proxy service,HA cluster?

[NICK_k]

Hello ,
I only use the mail proxy service, and I have configured the HA cluster, MASTER: 192.168.1.30, NODE: 192.168.1.31, and DNS ABC.COM points to 192.168.1.30 and 192.168.1.31 ,Client sets Relay server to ABC.COM, but if one of them stops serving, the other will not take over the mailing service?

 

[Stoiko Ivanov]

Depending on the clients, which try to relay via ABC.com - they usually should detect that they can't reach 192.168.1.30 and then try the next A record for ABC.com (192.168.1.31).

I Assume that you've setup the DNS records so that the fqdn you enter as relay for your clients resolves to both IP addresses

 

[NICK_k]

Yes, I have set DNS A record. If an exception occurs on 172.23.1.31, the client will fail to send mail. So i don't know how to solve this problem

 

[Stoiko Ivanov]

Switching to another IP listed in the A record of a fqdn is something that most smtp-servers handle quite well - maybe the client-software has some settings which need to be tuned?

one other option could be to setup a tcp loadbalancer in front of your 2 PMGs (ha-proxy for instance)

 

[NICK_k]

I have reset Cluster,but fail.
How can I solve this problem?
MASTER: ProxmoxMG
Node：ProxmoxMG1

Error Code:
Oct 19 17:18:14 ProxmoxMG pmgmirror[27945]: starting cluster syncronization
Oct 19 17:18:15 ProxmoxMG pmgmirror[27945]: database sync 'ProxmoxMG1' failed - DBD:g::st execute failed: ERROR: duplicate key value violates unique constraint "cstatistic_pkey"
DETAIL: Key (cid, rid)=(2, 59104) already exists. at /usr/share/perl5/PMG/DBTools.pm line 1086.
Oct 19 17:18:15 ProxmoxMG pmgmirror[27945]: cluster syncronization finished (1 errors, 0.38 seconds (files 0.26, database 0.11, config 0.00))

 

[Stoiko Ivanov]

* easiest fix would be to remove the node and add it again

 

[NICK_k]

I delete /etc/pmg/cluster.conf from Master and Node, and reset Cluster,right?