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How do you know you can restore your system to a working state in the event of an unscheduled outage, cruft or not? You should discriminate between services an
by count 15y ago
How do you know you can restore your system to a working state in the event of an unscheduled outage, cruft or not?
You should discriminate between services and systems - make your service available 100% of the time, but you should be able to kill and restart/reload/replace systems for maintenance or other reasons at nearly any time. And you SHOULD do that, because without proof that you can do it, your DR solution is simply a best guess.
- mburns 15y agoBy forcing Configuration Management Software (puppet, cfengine) so that one-off fixes that get hot patched on the production server and never documented.
- count 15y agoThis goes a very long way to helping, yes, but by itself does not guarantee anything. And not everything can be cfengined or puppeted.
- viraptor 15y agoYou can test for that in a staging environment. Restarting live services doesn't help you guarantee anything, but makes it more likely that you restart some server in a specific situation you can't recover from. (you'll never guarantee that you can recover from all situations)