Add ability to configure hostAliases in Helm chart to redirect traffic to proxy servers or custom endpoints via /etc/hosts entries.
Co-authored-by: Feng Lu <feng.lu@kindredgroup.com>
This PR adds DNS configuration support to the LibreChat Helm chart, enabling users to redirect traffic to proxy servers or use custom DNS settings.
## What's Changed
- Added dnsPolicy and dnsConfig fields to deployment.yaml template
- Added DNS configuration options to values.yaml with comprehensive examples
- Created documentation and example configurations
## Use Cases
- Redirect AI service traffic (AWS Bedrock, OpenAI, etc.) to proxy servers
- Use corporate DNS servers for name resolution
- Control traffic routing through custom DNS configurations
- Enforce traffic through security gateways
## Configuration Example
```yaml
dnsPolicy: "None"
dnsConfig:
nameservers:
- "10.0.0.10" # Custom DNS server for redirections
searches:
- "svc.cluster.local"
options:
- name: ndots
value: "2"
```
## Testing Results
✅ Successfully tested with Docker Compose environment
✅ DNS resolution correctly redirects to configured IPs
✅ HTTP requests properly routed to proxy servers
✅ Tested with multiple domains (AWS Bedrock, OpenAI, SageMaker)
Test output:
- bedrock-runtime.us-east-1.amazonaws.com -> 172.25.0.10 ✓
- api.openai.com -> 172.25.0.10 ✓
- sagemaker-runtime.us-east-1.amazonaws.com -> 172.25.0.10 ✓
All DNS redirects working correctly with proxy server receiving traffic.
## Documentation
- Added comprehensive DNS_CONFIGURATION.md guide
- Included examples for common use cases
- Provided troubleshooting steps
## Backward Compatibility
This change is fully backward compatible. If dnsPolicy and dnsConfig are not specified, the default Kubernetes DNS behavior is maintained.
Fixes #[issue_number]
Co-authored-by: LibreChat User <user@example.com>
