Andrew Athan via Postfix-users:
> I have a postfix based AWS on-demand instance but I can save some $ by
> running it as a spot instance ... after all, I don't mind brief delays
> delivering mail.
>
> To do this, I need to determine any and all directories that may get
> written to by postfix so that I can put those on a separate EBS volume that
> gets mounted separately from the AMI that boots the spot instance.
> Otherwise, when the spot instance is stopped or moved, I'll lose the mail
> queue etc.
>
> What is the best way for me to determine all those dirs? I'd either config
> them to be under a single "persistent parent folder" that is the EBS mount
> point, or symlink those dirs over to dirs within the mountpoint...
>
> ... any guidance on this is appreciated.
>
It's a subset of "postconf | grep _directory" output:
data_directory = /var/lib/postfix
queue_directory = /var/spool/postfix
Each has specific requirements for ownership and permissions.
If in doubt, run "postfix set-permissions".
Also. if you run the Postfix local delivery agent,
mail_spool_directory = /var/mail
Wietse
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