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https://github.com/iogbole/ebpf-k8s-experiment
Quick K8s setup to aid with eBPF experimentation
https://github.com/iogbole/ebpf-k8s-experiment
Last synced: 2 days ago
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Quick K8s setup to aid with eBPF experimentation
- Host: GitHub
- URL: https://github.com/iogbole/ebpf-k8s-experiment
- Owner: iogbole
- License: apache-2.0
- Created: 2024-01-19T13:12:21.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2024-01-19T13:14:38.000Z (about 1 year ago)
- Last Synced: 2024-01-19T14:29:47.505Z (about 1 year ago)
- Language: JavaScript
- Homepage:
- Size: 785 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
Awesome Lists containing this project
README
# Kubernetes Application Overview
This application comprises three main components:
1. **OpenMCT App**: A web-based mission control framework for visualization of data on desktop and mobile devices, primarily used by NASA. This service is exposed over an ingress. See `k8s-manifests/openmct-gke-ingres.yml`
2. **Sender App**: A Node.js application that sends HTTP requests to a receiver, over a K8s service and prints a reponse.
3. **Receiver App**: A Node.js application that responds to the Sender app with a simple "Hello" message.
The communication between the Sender and Receiver apps is managed through Kubernetes services, demonstrating basic inter-service communication in a microservices architecture.
## Deployment Instructions
### Prerequisites
- `kubectl` should be installed and configured to interact with your Kubernetes cluster.
### Step 1: Create Namespace
Create a dedicated namespace for the application components:
```bash
kubectl create ns ebpf
```
### Step 2: Set Namespace Context (Optional)
Optionally, set the `ebpf` namespace as the default for the current context:
```bash
kubectl config set-context --current --namespace=ebpf
```
### Step 3: Deploy Resources
Change directory to the k8s-manifests folder and apply all Kubernetes configurations in the current directory:
```bash
kubectl apply -f .
```
This command creates the necessary ConfigMap, Deployments, and Services:
- ConfigMap (`app-config`)
- Ingress (`openmct-ingress`)
- ServiceAccount (`israelo`)
- Deployments (`openmct`, `receiver`, `sender`)
- Services (`openmct`, `receiver-service`, `sender-service`)
### Step 4: Verify Deployments
Check the status of the pods to ensure they're running successfully:
```bash
kubectl get pods
```
You should see output similar to:
```
NAME READY STATUS RESTARTS AGE
openmct-f68f5445f-6f2hr 0/1 ContainerCreating 0 4m
receiver-6fbffb4b6d-7h4s2 1/1 Running 0 4m
receiver-6fbffb4b6d-jwqzm 1/1 Running 0 4m
sender-8b884c59-hfl6b 1/1 Running 0 3m59s
```
### Step 5: Access and Interact with the Applications
- **OpenMCT App**: Accessible via the NodePort or LoadBalancer IP, depending on your service configuration.
- **Sender and Receiver Apps**: Verify their interaction by checking the logs:
**For the Sender app:**
```bash
kubectl logs
```
You should see output similar to:
```
$ k logs sender-8b884c59-hfl6b
Error connecting to Receiver: connect ECONNREFUSED 10.88.1.204:80
Response from Receiver: Hello from Receiver!
Response from Receiver: Hello from Receiver!
Response from Receiver: Hello from Receiver!
Response from Receiver: Hello from Receiver!
Response from Receiver: Hello from Receiver!
```
**For the Receiver app:**
```bash
kubectl logs
```
You should see output similar to:
```
k logs receiver-6fbffb4b6d-7h4s2
Receiver listening at http://localhost:3000
Received request from Sender
Received request from Sender
```
### Step 6: Clean Up
To delete all deployed resources:
```bash
kubectl delete -f . --force --grace-period=0
```
---
Replace `` and `` with the actual names of your pods. This README provides a concise guide on deploying and interacting with your Kubernetes applications.