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# YaCy Helm Chart
<p align="center">
<img src="https://yacy.net/images/yacy-logo.png" width="100" alt="YaCy Logo"/>
</p>
This Helm chart deploys [YaCy](https://yacy.net/) - a distributed peer-to-peer search engine - on Kubernetes.
## Introduction
YaCy is a free, distributed search engine that can operate in two primary modes:
- **P2P Network Mode**: Connect to the global YaCy network to share search results
- **Standalone/Intranet Mode**: Run as an independent instance for private document indexing
This Helm chart simplifies deployment and management of YaCy in a Kubernetes environment, with support for various configurations and deployment scenarios.
## Prerequisites
- Kubernetes 1.12+
- Helm 3.0+
- PV provisioner support in the underlying infrastructure (for persistence)
## Installation
### Prerequisites Check
Before installing, ensure your Kubernetes cluster meets the requirements:
```bash
# Check Kubernetes version (requires 1.12+)
kubectl version --short
# Verify Helm is installed (requires 3.0+)
helm version
# Check for default StorageClass (for persistence)
kubectl get storageclass
```
### Install from Local Chart
```bash
# Navigate to the Helm chart directory
cd charts/yacy
# Install with default values
helm install my-yacy .
# OR install with custom values file
helm install my-yacy . -f my-values.yaml
# OR override specific values
helm install my-yacy . \
--set service.type=NodePort \
--set yacy.adminPassword=mysecurepassword \
--set persistence.size=20Gi
```
### Install from Repository (Future)
Once this chart is published to a Helm repository, you'll be able to install it with:
```bash
# Add the repository
helm repo add yacy https://yacy.github.io/helm-charts/
helm repo update
# Install the chart
helm install my-yacy yacy/yacy
```
### Verifying Installation
```bash
# Check if the pod is running
kubectl get pods -l "app.kubernetes.io/instance=my-yacy"
# See the deployed service
kubectl get svc -l "app.kubernetes.io/instance=my-yacy"
# Read installation notes
helm status my-yacy
```
## Uninstalling the Chart
To uninstall/delete the `my-yacy` deployment:
```bash
helm uninstall my-yacy
```
## Parameters
### Common parameters
| Name | Description | Value |
|---------------------|----------------------------------------------------|--------|
| `replicaCount` | Number of YaCy replicas | `1` |
| `nameOverride` | String to partially override yacy.fullname template | `""` |
| `fullnameOverride` | String to fully override yacy.fullname template | `""` |
### YaCy Image parameters
| Name | Description | Value |
|-------------------------|------------------------------------------------|------------------------|
| `image.useLocal` | Use locally built image instead of repository | `true` |
| `image.localRepository` | Local image name when useLocal is true | `yacy_search_server` |
| `image.localTag` | Local image tag when useLocal is true | `local` |
| `image.repository` | YaCy image repository when useLocal is false | `yacy/yacy_search_server` |
| `image.tag` | YaCy image tag when useLocal is false | `1.930` |
| `image.pullPolicy` | YaCy image pull policy when useLocal is false | `IfNotPresent` |
| `imagePullSecrets` | Specify docker-registry secret names | `[]` |
### Architecture-specific images
| Name | Description | Value |
|---------------------|----------------------------------------------------|------------------------|
| `arch.amd64` | Tag for AMD64 architecture | `latest` |
| `arch.arm64` | Tag for ARM64 architecture | `aarch64-latest` |
| `arch.arm` | Tag for ARM architecture | `armv7-latest` |
### YaCy configuration parameters
| Name | Description | Value |
|---------------------------|----------------------------------------------|-----------|
| `env` | YaCy environment variables | `{}` |
| `yacy.adminPassword` | YaCy admin password | `"yacy"` |
| `yacy.settings.maxMemory` | Maximum memory allocation for YaCy | `"600m"` |
| `yacy.settings.joinP2PNetwork` | Whether to join the YaCy P2P network | `true` |
### Persistence Parameters
| Name | Description | Value |
|----------------------------|-------------------------------------------------|---------------|
| `persistence.enabled` | Enable persistence using PVC | `true` |
| `persistence.existingClaim`| Use an existing PVC to persist data | `""` |
| `persistence.storageClass` | Storage class of backing PVC | `""` |
| `persistence.accessMode` | PVC Access Mode | `ReadWriteOnce` |
| `persistence.size` | Size of data volume | `10Gi` |
| `persistence.annotations` | Additional annotations for the PVC | `{}` |
### Exposure Parameters
| Name | Description | Value |
|----------------------------|-------------------------------------------------|---------------|
| `service.type` | Kubernetes Service type | `ClusterIP` |
| `service.httpPort` | HTTP Service port | `8090` |
| `service.httpsPort` | HTTPS Service port | `8443` |
| `ingress.enabled` | Enable ingress controller resource | `false` |
| `ingress.className` | IngressClass that will be used | `""` |
| `ingress.hosts[0].host` | Default host for the ingress resource | `yacy.local` |
| `ingress.hosts[0].paths` | Paths for the default host | `[{"path":"/","pathType":"Prefix"}]` |
| `ingress.tls` | TLS configuration | `[]` |
### Other Parameters
| Name | Description | Value |
|----------------------------|-------------------------------------------------|---------------|
| `resources` | CPU/Memory resource requests/limits | `{}` |
| `nodeSelector` | Node labels for pod assignment | `{}` |
| `tolerations` | Tolerations for pod assignment | `[]` |
| `affinity` | Affinity for pod assignment | `{}` |
## Building and Publishing Images
YaCy can be deployed using either a locally built Docker image or an official image from Docker Hub.
### Option 1: Using Official Images from Docker Hub
The simplest approach is to use the official YaCy images:
```yaml
# values.yaml
image:
useLocal: false
repository: yacy/yacy_search_server
tag: latest # or specific version like "1.930"
pullPolicy: IfNotPresent
```
### Option 2: Building Custom Images
For custom builds or development, you can build your own images:
#### Setting up a Local Docker Registry
1. **Start a local Docker registry**:
```bash
docker run -d -p 5000:5000 --restart=always --name registry registry:2
```
2. **Build the YaCy Docker image**:
```bash
# The Dockerfiles are in the ./docker/ directory of the YaCy project
cd docker
# Build for your platform (x86_64/amd64)
docker build -t localhost:5000/yacy/yacy_search_server:latest -f Dockerfile ../
# Push to local registry
docker push localhost:5000/yacy/yacy_search_server:latest
```
3. **For multi-architecture support** (optional):
```bash
# ARM64 architecture
docker build -t localhost:5000/yacy/yacy_search_server:aarch64-latest -f Dockerfile.aarch64 ../
docker push localhost:5000/yacy/yacy_search_server:aarch64-latest
# ARMv7 architecture
docker build -t localhost:5000/yacy/yacy_search_server:armv7-latest -f Dockerfile.armv7 ../
docker push localhost:5000/yacy/yacy_search_server:armv7-latest
```
4. **Create a custom values file** (e.g., `local-registry-values.yaml`):
```yaml
image:
useLocal: false
repository: localhost:5000/yacy/yacy_search_server
tag: latest
pullPolicy: Always
```
5. **Install with your custom values**:
```bash
helm install my-yacy ./charts/yacy -f local-registry-values.yaml
```
6. **For external Kubernetes clusters**, add registry credentials:
```bash
# Create a Docker registry secret
kubectl create secret docker-registry regcred \
--docker-server=localhost:5000 \
--docker-username=<your-username> \
--docker-password=<your-password>
# Add to your values file
imagePullSecrets:
- name: regcred
```
## Deployment Examples
### Quick Start: Using a locally built image
```bash
# 1. Build the local image (from YaCy source directory)
cd docker
docker build -t yacy_search_server:local -f Dockerfile ../
# 2. Install the chart
helm install my-yacy ./charts/yacy
```
### Common Configuration Examples
#### Deployment Scenarios
##### 1. Public YaCy Node (P2P Network)
```yaml
# values.yaml
yacy:
settings:
joinP2PNetwork: true
maxMemory: "1500m"
adminPassword: "secure-password-here"
persistence:
enabled: true
size: 20Gi
```
##### 2. Private Intranet Search Engine
```yaml
# values.yaml
yacy:
settings:
joinP2PNetwork: false # Standalone mode
maxMemory: "2000m"
adminPassword: "secure-password-here"
# Optional: Add intranet crawler configuration
configFile: |
network.unit.agent=CompanySearchEngine
network.unit.description=Internal Document Search
crawler.http.maxDepth=5
persistence:
enabled: true
size: 50Gi
```
#### Exposure Options
##### 1. Basic ClusterIP (default)
```yaml
service:
type: ClusterIP
```
##### 2. NodePort for simple external access
```yaml
service:
type: NodePort
```
##### 3. Ingress with TLS
```yaml
ingress:
enabled: true
className: nginx
annotations:
cert-manager.io/cluster-issuer: letsencrypt-prod
hosts:
- host: search.example.com
paths:
- path: /
pathType: Prefix
tls:
- secretName: yacy-tls
hosts:
- search.example.com
```
#### Resource Allocation
```yaml
# Recommended for production use
resources:
limits:
cpu: 2000m
memory: 2Gi
requests:
cpu: 1000m
memory: 1Gi
# Set YaCy memory to ~75% of container limit
yacy:
settings:
maxMemory: "1500m"
```
#### Architecture-Specific Deployments
##### ARM64/aarch64 Deployment
```yaml
image:
useLocal: false
repository: yacy/yacy_search_server
tag: aarch64-latest
```
##### ARMv7 Deployment
```yaml
image:
useLocal: false
repository: yacy/yacy_search_server
tag: armv7-latest
```
## Management
### Backup and Restore
YaCy's data is stored in `/opt/yacy_search_server/DATA` and persisted to a PVC when `persistence.enabled=true`.
#### Backup YaCy Data
```bash
# 1. Find the pod name
POD_NAME=$(kubectl get pods -l "app.kubernetes.io/instance=my-yacy" -o jsonpath="{.items[0].metadata.name}")
# 2. Create a backup (two methods)
# Option A: Direct backup to local machine
kubectl exec $POD_NAME -- tar -cf - /opt/yacy_search_server/DATA | gzip > yacy-backup-$(date +%Y%m%d).tar.gz
# Option B: Backup within pod first (if pod has sufficient storage)
kubectl exec $POD_NAME -- bash -c "cd /opt && tar -czf /tmp/yacy-backup.tar.gz yacy_search_server/DATA"
kubectl cp $POD_NAME:/tmp/yacy-backup.tar.gz ./yacy-backup-$(date +%Y%m%d).tar.gz
```
#### Restore YaCy Data
```bash
# First, stop YaCy gracefully (important for index integrity)
POD_NAME=$(kubectl get pods -l "app.kubernetes.io/instance=my-yacy" -o jsonpath="{.items[0].metadata.name}")
kubectl exec $POD_NAME -- /opt/yacy_search_server/stopYACY.sh
# Wait for YaCy to fully shut down
sleep 15
# Restore from backup
cat yacy-backup.tar.gz | kubectl exec -i $POD_NAME -- bash -c "cd /opt && rm -rf yacy_search_server/DATA/* && tar -xzf -"
# Restart the pod
kubectl delete pod $POD_NAME
```
### Troubleshooting
#### Verify Deployment Status
```bash
# Check if pods are running
kubectl get pods -l "app.kubernetes.io/instance=my-yacy"
# Verify services
kubectl get svc -l "app.kubernetes.io/instance=my-yacy"
# Check persistent volume claims
kubectl get pvc -l "app.kubernetes.io/instance=my-yacy"
```
#### Check Logs
```bash
# Follow logs from the YaCy pod
POD_NAME=$(kubectl get pods -l "app.kubernetes.io/instance=my-yacy" -o jsonpath="{.items[0].metadata.name}")
kubectl logs -f $POD_NAME
# View YaCy application logs directly
kubectl exec $POD_NAME -- cat /opt/yacy_search_server/DATA/LOG/yacy00.log
```
#### Common Issues
1. **YaCy pod crashes immediately**: Check memory settings - container's memory limit should be higher than `yacy.settings.maxMemory`
2. **Can't access YaCy UI**: Verify the service is correctly exposed; try port-forwarding for quick access:
```bash
kubectl port-forward svc/my-yacy 8090:8090
```
3. **Slow crawling/indexing**: Increase resource limits and YaCy's memory allocation
4. **Persistence issues**: Check that the PVC is correctly bound and has sufficient space:
```bash
kubectl get pvc
kubectl describe pvc my-yacy-data
```
## Contributing
Contributions to improve this chart are welcome! To contribute:
1. Fork the repository
2. Create your feature branch (`git checkout -b feature/amazing-feature`)
3. Commit your changes (`git commit -m 'Add some amazing feature'`)
4. Push to the branch (`git push origin feature/amazing-feature`)
5. Open a Pull Request
Please refer to the YaCy project's [contribution guidelines](https://github.com/yacy/yacy_search_server/blob/master/CONTRIBUTING.md) for more information.