Simple backup of maildir folder

[Francis Augusto Medeiros-Logeay]

> On 31 May 2020, at 11:13, Laura Smith <n5d9xq3ti233xiyif2vp at protonmail.ch> wrote:
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> Sent with ProtonMail Secure Email.
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> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>> On Sunday, 31 May 2020 09:35, @lbutlr <kremels at kreme.com> wrote:
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>> A couple of notes on this quite useful script:
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>> My mktemp does not support -p (FreeBSD 12.1) is I had to change the script to:
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> In my scripts I tend to create a tempdir and then tempfiles within that.  It makes the cleanup routine neater, e.g. at the top of my scripts :
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> TEMP_DIR=$(mktemp -qd || { doLog "Failed to make temp dir !"; exit 1; })
> rmTmpFiles() { rm -rf "${TEMP_DIR}"; }
> createTempFile() { local MYTEMP=$(mktemp -qp "${TEMP_DIR}" || doLog "Failed to create temp file"; exit 1); echo $MYTEMP; }
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I don’t think I need to clean up, and my “temp_dir” will end up being permanent, as to make doveadm backup snappier I will simply maintain the directory there and use crown jobs to update the dir. 


> Also my backup scripts have locking procedures built-in so as to avoid race conditions.

Also not sure if that’s needed when using doveadm backup, as it takes care of the potential race conditions. 

So the idea is to use doveadm to a local folder, then rsync it to a remote server where snapshots can be easily created. 

It annoys me have to do the doveadm to the local server - seems like a waste of disk space, but since maildirlock is not working and since doveadm backup to a remote server requires a bit more work to, well, to work, so I guess this is a simple and quick solution. 

Best,

Francis