Add raven deployment configuration for Kubernetes #253
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Summary of ChangesHello @Aravinda-HWK, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request integrates the Raven service into a Kubernetes environment by providing a dedicated deployment configuration. This enables the Raven application to be deployed, managed, and scaled within a Kubernetes cluster, streamlining its operational aspects and leveraging container orchestration capabilities. Highlights
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Code Review
This pull request introduces a Kubernetes deployment configuration for the Raven service. While this is a good step, the current manifest has several areas for improvement related to security, stability, and portability, which are important for a production-ready environment. The key issues identified include running the container as the root user, using the :latest image tag, relying on hostPath for volumes, and missing resource definitions. Addressing these points will significantly enhance the robustness and security of the deployment.
| securityContext: | ||
| runAsUser: 0 | ||
| runAsGroup: 0 |
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Running containers as the root user (runAsUser: 0) is a significant security risk. A vulnerability in the application could be exploited to gain root access within the container, and potentially escalate privileges to the host node. It is a security best practice to run processes as a non-privileged user. Please update your Docker image to use a non-root user and set runAsUser and runAsGroup to a non-zero value (e.g., 1001, depending on the user defined in your image).
securityContext:
runAsUser: 1001
runAsGroup: 1001| spec: | ||
| containers: | ||
| - name: raven | ||
| image: ghcr.io/lsflk/raven:latest |
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Using the :latest image tag is not recommended for production deployments as it makes them non-deterministic. If the latest tag is updated, subsequent deployments or pod restarts could pull a new, potentially breaking version of the image. Please use a specific, immutable tag like a semantic version or a git SHA to ensure predictable deployments.
image: ghcr.io/lsflk/raven:v1.0.0| - containerPort: 143 | ||
| - containerPort: 993 | ||
| - containerPort: 24 | ||
| - containerPort: 12345 |
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The container definition is missing resource requests and limits for CPU and memory. This can lead to performance issues and instability in the cluster. Without resource requests, the scheduler can't make informed decisions, and without limits, the container can consume all available resources on a node. Setting these values is critical for ensuring application reliability and fair resource sharing. The values in the suggestion are examples and should be adjusted based on performance testing.
- containerPort: 12345
resources:
requests:
memory: "128Mi"
cpu: "100m"
limits:
memory: "512Mi"
cpu: "500m"| - name: raven-config | ||
| hostPath: | ||
| path: /root/mail/silver/services/silver-config/raven/conf | ||
| type: Directory | ||
| - name: raven-certs | ||
| hostPath: | ||
| path: /root/mail/silver/services/silver-config/raven/certs | ||
| type: Directory |
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Using hostPath volumes makes the deployment dependent on a specific node's filesystem structure and poses a security risk by exposing the host filesystem to the container. The paths under /root are especially concerning. The standard and more portable approach in Kubernetes is to use ConfigMap for configuration files and Secret for sensitive data like certificates. This decouples your application from the underlying nodes. You would need to create the corresponding ConfigMap and Secret resources in your cluster.
- name: raven-config
configMap:
name: raven-config-map
- name: raven-certs
secret:
secretName: raven-certs-secret| metadata: | ||
| name: raven-server | ||
| spec: | ||
| replicas: 1 |
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The deployment is configured with only one replica. This creates a single point of failure. If the node running the pod goes down or the pod crashes, the service will be unavailable until it's rescheduled and started. For better availability, consider increasing the number of replicas to at least 2.
replicas: 2
📌 Description
This PR is to add Raven k8s configuration yaml files into the system.
🔍 Changes Made
✅ Checklist (Email System)
🧪 Testing Instructions
📷 Screenshots / Logs (if applicable)