Kubernetes - Resource Management
Given a cluster with a node group set to min=1 and max=3 nodes, and currently 1 node running, what will Cluster Autoscaler do if 5 new pods requiring 1 CPU each are scheduled but the node has only 2 CPUs free?
Given a cluster with a node group set to min=1 and max=3 nodes, and currently 1 node running, what will Cluster Autoscaler do if 5 new pods requiring 1 CPU each are scheduled but the node has only 2 CPUs free?
medium📝 Command Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze resource demand and node capacity
5 pods need 5 CPUs total; current node has 2 CPUs free, so 3 more CPUs needed.Step 2: Check node group limits and scaling behavior
Min=1, max=3 nodes means up to 2 more nodes can be added to meet demand.Step 3: Determine autoscaler action
Autoscaler adds 2 nodes to provide enough CPUs for all pods.Final Answer:
Add 2 more nodes to accommodate all pods -> Option DQuick Check:
Pods need > current capacity -> add nodes up to max [OK]
Quick Trick: Autoscaler adds nodes until max or demand met [OK]
Common Mistakes:
- Assuming only one node added regardless of demand
- Thinking autoscaler ignores max node limit
- Confusing scale-up with scale-down behavior
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