Nicolai Ort
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50 lines
1.7 KiB
Markdown
50 lines
1.7 KiB
Markdown
---
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title: "The Cluster API Migration Retrospective: Live migrating hundreds of clusters to Cluster API"
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weight: 2
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tags:
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- rejekts
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- cluster
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- operator
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- multicluster
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---
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{{% button href="https://www.youtube.com/watch?v=r0W6cCJAGro" style="warning" icon="video" %}}Watch talk on YouTube{{% /button %}}
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<!-- {{% button href="https://docs.google.com/presentation/d/1nEK0CVC_yQgIDqwsdh-PRihB6dc9RyT-" style="tip" icon="person-chalkboard" %}}Slides{{% /button %}} -->
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The talk started with a base introduction of ClusterAPI and the operations at gigantswarm.
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TODO: Diagram
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Product naming for the next noted:
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- `vintage`: Legacy system
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- `CAPI`: The new shit
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## Goal
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Deployemnt targets: AWS, Azure, vSphere
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Live migrations needed für AWS (other providers were not that much in use -> migrate manually)
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## Migration
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- They set up a new management cluster for CAPI to
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- Tooling Options:
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- CLI: Enough for a couple of hundred clusters
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- Operator: The way to go for thousands of clusters
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- Blue/Green:
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TODO: Sequence diagram
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## Whow it went
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- New bugs discovered with every couple of customers
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- Some cloud regions just love to fuck things up (looking at you aws china)
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- Using upstream sometimes prevents you from implementing random hacks but this is good
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- The Mixed vintage+CAPI team split into a new CAPI-team and a new vintage-team -> Setting priorities was way too hard in the mixed team
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- Implementing new providers (GCP, Openstack, etc) is way simpler nowadays
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- There is a timepline from custom tooling over product to commodity
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## Q&A
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- Were there any fears from the customers regarding the migration?
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- There are some but long term relations to customers help
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