# Cilium Component

## Overview

Cilium is our CNI (Container Network Interface) solution that provides networking, security, and observability for Kubernetes using eBPF.

## Configuration

The following configurations are available:

- Version: 1.18.3
- IPAM Mode: kubernetes
- Hubble UI: Enabled
- L2 Announcements: Enabled
- kube-proxy Replacement: Enabled

## Features

- **Hubble UI**: Web interface for network observability
- **L2 Announcements**: For LoadBalancer service type support
- **Enhanced Security**: Using eBPF for network policy enforcement
- **Kube-proxy Replacement**: Native handling of service load-balancing

## Post-Install

After installation:

1. Cilium core components will be installed
2. Hubble UI and Relay will be deployed
3. LoadBalancer IP pools will be configured
4. Initial access to Hubble UI is available through port-forward:

   ```bash
   kubectl port-forward -n kube-system svc/hubble-ui 12000:80
   ```

   Then visit: `http://localhost:12000`

## Dependencies

- Kubernetes cluster
- Helm v3+
- Linux kernel >= 4.9.17

## Troubleshooting

1. Check if Cilium pods are running:

   ```bash
   kubectl get pods -n kube-system -l k8s-app=cilium
   ```

2. Check Cilium status (requires Cilium CLI):

   ```bash
   cilium status
   ```

3. Check Hubble UI deployment:

   ```bash
   kubectl get deployment -n kube-system hubble-ui
   ```

4. View Cilium logs:

   ```bash
   kubectl logs -n kube-system -l k8s-app=cilium
   ```

To install Cilium CLI:

```bash
brew install cilium-cli
```