I will rewrite use-case. Pmg send mail for example: From: root@pmg.domain.tld.
I need to send as root@domain.tld so spf will allign with _spf.domain.tld., because in now it's trying to find _spf.pmg.domain.tld record and spf check fail.
Hi mail server Neo! My hostname is pmg-01.domain.tld and I...
For pmg generated mails i see From: pmg.domain.tld. Where in gui i can set something as "mydomain" for postfix (dns.domain in template?), so pmg generated mails can align to mydomain spf record? Can't find it.
Depends on services in VM. Snapshot is backup of the running state, not when everything in VM is off. So for file server it's almost ok, for db server not.
There is no way to create backup with running VM as if VM is off.
ad 1] proxmox doesn't have "close to zero" VM failover
read proxmox documenattion how HA works
ad 2]
option a] shared network storage
option b] postgresql replication
both methods are documented on the internet
ad 3] postgresql documenation about WAL files
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