docs(day-1): Added multicluster pdb talk
This commit is contained in:
parent
30a976bb75
commit
cc5325bf3f
51
content/day-1/06_scaling-pdbs.md
Normal file
51
content/day-1/06_scaling-pdbs.md
Normal file
@ -0,0 +1,51 @@
|
||||
---
|
||||
title: "Scaling PDBs: Introducing Multi-Cluster Resilience with x-pdb"
|
||||
weight: 6
|
||||
tags:
|
||||
- rejekts
|
||||
- multicluster
|
||||
---
|
||||
|
||||
<!-- {{% button href="https://youtu.be/rkteV6Mzjfs" style="warning" icon="video" %}}Watch talk on YouTube{{% /button %}} -->
|
||||
|
||||
## Baseline Infra
|
||||
|
||||
- Multiple Clusters across cloud providers
|
||||
- Cilium with Clustermesh
|
||||
- Stretched CockroachDB and NATS
|
||||
|
||||
TODO: Steal overview from slides
|
||||
|
||||
## PDBs and limits
|
||||
|
||||
- PDB: Classic core component that requires a number of pods with successfull readyness probes per deployment
|
||||
- Eviction: Can be stopped by a PDB what has not reached the minimum available
|
||||
- Interruptions: Voluntary (New image, updated specs, ...) vs involuntary (Eviction, deletion, node pressule, NoExecute, Node deletion)
|
||||
|
||||
## Stateful across multiple clusters
|
||||
|
||||
- Baseline: PDBs only know about one cluster
|
||||
- Problem: If the master pod fails (or get's evicted) on 2/3 clusters
|
||||
- Factors: Movement, Maintainance, Chaos-Experiments, Secret rotation
|
||||
- Workaround: Just manually check all systems before doing anything
|
||||
- Idea: Multi-Cluster PDB
|
||||
- Solution: A new hook on the eviciton api that interacts with a new Cluster-Aware CRD
|
||||
|
||||
## How it actually works
|
||||
|
||||
1. Drain API get's called
|
||||
2. Check replicas accross cluster
|
||||
3. Anwer based on current state
|
||||
|
||||
Actually: There is a lease-mechanism to prevent race conditions across clusters
|
||||
|
||||
TODO: Steal diagram from slides
|
||||
|
||||
## What works
|
||||
|
||||
- Voluntary: 100% supported
|
||||
- Involuntary: Yes they hooked into most of the deletion api calls (eviction, pressure, kubectl delete, admissions, node deletion)
|
||||
|
||||
## Demo
|
||||
|
||||
Pretty interesting, watch the video to find out
|
@ -5,11 +5,13 @@ weight: 3
|
||||
---
|
||||
|
||||
The second and last day of cloud native rejekts and (some might say most importantly) time for my talk.
|
||||
This was another very interesting day and I can only recommend attending cloud native rejekts (and will always try to atend in the future if possible).
|
||||
|
||||
## Talk recommendations
|
||||
|
||||
- My Talk: [Evaluating Global Load Balancing Options for Kubernetes in Practice](todo:)
|
||||
- Service Mesh Intro + Comparison: [The service mesh wars - a new hope for kubernetes](../03_service-mesh)
|
||||
- How to handle evection and statefulness across clusters: [Scaling PDBs: Introducing Multi-Cluster Resilience with x-pdb](../06_scaling-pdbs)
|
||||
- Intro to operators: [The Hidden Brains of Kubernetes: Meet Controllers Powering the Cloud](../02_controllers)
|
||||
|
||||
## Other stuff I learned or people i talk to
|
||||
|
Loading…
x
Reference in New Issue
Block a user