On 22.11.2017 23:26, Haw Loeung wrote: > Hi Tilman, > > On Wed, Nov 22, 2017 at 04:02:08PM +0100, Tilman Baumann wrote: >> However, that doesn't seem to work. Juju complains the relation doesn't >> exist. >> $ juju add-relation cassandra-backup:database cassandra:database >> ERROR no relations found >> >> So, is there a interface that I can (ab-)use in a similar way? >> >> I don't want to build a full blown cassandra interface and at it to the >> list. > > Not sure if you've seen this, but I did some work recently with > something similar to backup Cassandra DBs: > > | https://jujucharms.com/u/hloeung/cassandra-backup/
I didn't want to talk about it before it's usable. I think I might be working on something similar. https://github.com/tbaumann/jujucharm-layer-cassandra-backup It seems to only use "nodetool snapshot" I'm integrating this for a 3rd party so I don't quite know what is going on there. But looks like the intent is pretty much the same. > It's currently still experimental and uses the CQL COPY > TO... commands. The Cassandra charm already ships out the required > credentials so tools such as cqlsh should just work. Good point. And worst case I can read the yaml file for cassandra myself. Saves me a cumbersome additional relation. I was undecided about this. But this is shaping up to be the cleaner solution...
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