Major overhaul - #26
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zhimsel wants to merge 76 commits into
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Selects volumes to snapshot from tags on instances instead of volumes.
Fixed errors reported by flake8 (except the complexity of the for-loop on line 151)
It's more descriptive in the config file
Makes it a little more readable and removes redundant information
Reflects structural changes to script (e.g. it uses instance tags instead of volume tags).
TAGS: Autosnap will now tag the snapshots it makes with the same
user-configured tag specified in the config file. It will also use that
tag to filter out which snapshots to delete and not delete.
DELETION: Autosnap now bases its deletion decisions based on the NUMBER
of snapshots, not the AGE of the snapshots. This allows two things to happen:
1. This can be run in an on-demand basis instead of having to be run
on a schedule.
2. This prevents autosnap from deleting all of the snapshots for a volume
if it hasn't backed up in more than X number of days. For instance, if
the script fails to run over a weekend and you only want to keep the
last 3 days, it would previously have deleted all the snapshots if
you came back on Monday and manually ran the script (or fixed the
issue).
INTERVAL: This commit also removes the concept of 'daily', 'weekly' or
'monthly' snapshots. The new setting only configures how many snapshots
you want to keep, period. No more having different sets of snapshots to
keep track of.
If the tag 'autosnap_limit' exists on any instance it's snapshotting, autosnap will use that value instead of the global setting in the config file.
Very useful for testing.
Any volume that is part of an instance that we snapshot will be ignored if the tag 'autosnap_ignore' is present (doesn't matter what the value is).
Major design change, but I feel it simplifies dealing with instance tags. Instead of setting two tags, autosnap:true and autosnap_frequency:X, you just set one tag, autosnap:X. Also changes what autosnap tags the new snapshots as to the custom 'tag_name' setting, instead of the hardcoded 'autosnap'. This allows users to run multiple copies of this script with different tags.
If there are no current snapshots, it would give an error and not take one (therefore "new" instances would never be snapshotted). This commit fixes that. If the snapshot list is empty, it forces a snapshot (skipping the date compare).
Fixes error with new instances having no snapshots, among other things
Use the config.get() function instead of reading directly. This
necessitates a change in how a dry-run is checked for ('if' instead of
'try').
It's basically a whole new script, anyway...
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That's a different tool now and less useful for me. I wouldn't merge it here. |
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Yeah, this feels like a fork that you should release separately. |
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Feel free to merge this PR if you'd like. It's a major overhaul of the script with lots of improvements, but also includes some architectual changes as well as a new name.
Changes (might not be exhaustive):