doc: Affinity, Tolerations and Node Selector

Signed-off-by: Yellow Shine <[email protected]>

README.md

@@ -33,6 +33,38 @@ To add a new chart, create a directory inside _charts_ with it contents at _mast
 When you commit it, it will be picked up by the GitHub action, and if it contains a chart and version that doesn't already exist in the _charts repository_, a new release with the package for the chart will be published on the _GitHub repository_,
 and the list of all charts at `index.yaml` on _gh-pages_ branch will be updated on the _charts repository_.
 
+## Documentation
+
+This repository includes detailed configuration guides to help you properly set up Milvus in your Kubernetes cluster:
+
+- [Node Selector Configuration Guide](docs/node-selector-configuration-guide.md)
+- [Affinity Configuration Guide](docs/affinity-configuration-guide.md)
+- [Tolerations Configuration Guide](docs/tolerations-configuration-guide.md)
+
+### Important Configuration Considerations
+
+When configuring pod scheduling in Kubernetes, be aware of potential conflicts between different scheduling mechanisms:
+
+1. **Node Selectors vs Node Affinity**
+   - Node selectors provide a simple way to constrain pods to nodes with specific labels
+   - Node affinity provides more flexible pod scheduling rules
+   - When used together, **both** node selector and node affinity rules must be satisfied
+   - Consider using only one mechanism unless you have specific requirements
+
+2. **Scheduling Priority**
+   - Node Selectors: Hard requirement that must be satisfied
+   - Required Node Affinity: Hard requirement that must be satisfied
+   - Preferred Node Affinity: Soft preference that Kubernetes will try to satisfy
+   - Pod Anti-Affinity: Can prevent pods from being scheduled on the same node
+
+3. **Best Practices**
+   - Start with simple node selectors for basic constraints
+   - Use node/pod affinity for more complex scheduling requirements
+   - Avoid combining multiple scheduling constraints unless necessary
+   - Test your configuration in a non-production environment first
+
+For detailed examples and configurations, please refer to the documentation guides linked above.
+
 ## More information
 
 You can find more information at: