RSS support for deploying multiple instances of a component on a Sled #3446
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davepacheco
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Sorry for the force push. The change is about the same, but it was much easier to rebase this one than resolve a bunch of the merge conflicts. |
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smklein
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| // Load the information we need about each Sled to be able to allocate | ||
| // components on it. | ||
| let mut sled_info = { | ||
| let result: Result<Vec<SledInfo>, PlanError> = | ||
| futures::future::try_join_all(sleds.values().map( | ||
| |sled_request| async { | ||
| let subnet = sled_request.subnet; | ||
| let sled_address = get_sled_address(subnet); | ||
| let u2_zpools = | ||
| Self::get_u2_zpools_from_sled(log, sled_address) | ||
| .await?; | ||
| let is_scrimlet = | ||
| Self::is_sled_scrimlet(log, sled_address).await?; | ||
| Ok(SledInfo::new( | ||
| sled_request.id, | ||
| subnet, | ||
| sled_address, | ||
| u2_zpools, | ||
| is_scrimlet, | ||
| )) | ||
| }, | ||
| )) | ||
| .await; | ||
| result? | ||
| }; |
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Should we just make this Vec<SledInfo> a required input to this function?
If we do so, I don't think this function tries to contact sled agents directly, and it might be easier to write tests using a "TransientDnsServer"
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Yes, I think that's a great idea.
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Based on #3390 because that changes a bunch of the same code and I expect it to land sooner than this.
This PR moves us closer to being able to provision multiple CockroachDB zones, even on the same host (e.g., in development and CI) by reworking how RSS assigns components to Sleds to be component-oriented instead of sled-oriented.
I had initially thought I'd do some more work in this PR but I think I want to separate that into follow-on PRs.