| eandersson | frickler ^ | 07:48 |
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| openstackgerrit | Nicolas Bock proposed openstack/designate master: Community Goal: Project PTL & Contrib Docs Update https://review.opendev.org/719452 | 12:53 |
| andrewbogott | Today I am puzzling over | 13:27 |
| andrewbogott | https://www.irccloud.com/pastebin/I2qjltYB/ | 13:27 |
| andrewbogott | I'm currently using memcached as my coordination backend, and trying to bolster the HAness of my designate setup. | 13:28 |
| andrewbogott | that URL is a spof, right? How do people handle that? | 13:28 |
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| eandersson | andrewbogott what do you mean with spof? | 17:21 |
| andrewbogott | eandersson: I'm not sure I know what I mean :) Presumably if that points to a single memcached host and that service goes down, something breaks | 17:22 |
| andrewbogott | but I'm not clear on exactly what breaks | 17:22 |
| andrewbogott | Similarly, if it points to a memcached cluster and half the cache vanishes because a server dies… that must also break something at least a little bit | 17:23 |
| eandersson | Ah - yea you would need to use a keepalived vip or similar | 17:24 |
| eandersson | in front of memcached | 17:25 |
| eandersson | but in reality you are probably better of using redis or zookeeper | 17:25 |
| andrewbogott | eandersson: we use nutcracker (and/or mcrouter) to cluster memcached. That would solve the uptime issue, but not the losing-half-our-state-in-an-outage issue. Should I mostly worry about that or mostly not worry about it? | 18:16 |
| eandersson | I haven never tried nutcracker, but if you have a lab it might be worth just testing losing a node to see what happens. | 19:17 |
| eandersson | The coordinator isn't critical for designate (at least not in your current release). | 19:17 |
| eandersson | It should still function if you lose it for a short duration. | 19:17 |
| eandersson | tl;dr wouldn't worry about it too much | 19:18 |
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