https://github.com/simagix/k8s-rpi-demo
Demo of Kubernetes on Raspberry PI cluster
https://github.com/simagix/k8s-rpi-demo
Last synced: 4 months ago
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Demo of Kubernetes on Raspberry PI cluster
- Host: GitHub
- URL: https://github.com/simagix/k8s-rpi-demo
- Owner: simagix
- Created: 2016-02-26T19:27:17.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2016-03-06T03:43:22.000Z (over 10 years ago)
- Last Synced: 2025-06-16T07:50:37.733Z (12 months ago)
- Size: 347 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Demo of Kubernetes on Raspberry PI
### Application Flow
### Modules
- simagix/mobile-signature
- simagix/signature-map
- mqtt broker (mosquitto or mqtt://test.mosquitto.org)
### Kubernetes
Start web apps using kubectl
```
export EXTERNAL_IP=192.168.1.2
kubectl run mosquitto --image=simagix/mosquitto-rpi --port=1883
kubectl expose rc mosquitto --port=1883 --target-port=1883 --external-ip=$EXTERNAL_IP
kubectl run mobile-signature --image=simagix/mobile-signature-rpi --port=3300 --env="MQTT_BROKER=mqtt://$EXTERNAL_IP"
kubectl expose rc mobile-signature --port=3300 --target-port=3300 --external-ip=$EXTERNAL_IP
kubectl run signature-map --image=simagix/signature-map-rpi --port=3301 --env="MQTT_BROKER=mqtt://$EXTERNAL_IP"
kubectl expose rc signature-map --port=3301 --target-port=3301 --external-ip=$EXTERNAL_IP
```
### Get Info
```
kubectl get nodes
kubectl get pods
kubectl get rc
kubectl get svc
```
### Scale
```
kubectl scale rc busybox --replicas=5
kubectl scale rc mobile-signature --replicas=1
kubectl scale rc signature-map --replicas=2
```
```
$ kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE NODE
busybox-iown8 1/1 Running 0 1m 192.168.1.5
k8s-master-127.0.0.1 3/3 Running 6 4d 127.0.0.1
mobile-signature-zflym 1/1 Running 0 56s 192.168.1.5
signature-map-14zj2 1/1 Running 0 41s 192.168.1.5
```
### Stop Services
```
kubectl delete svc signature-map
kubectl delete rc signature-map
#kubectl delete pod signature-map-
kubectl delete svc mobile-signature
kubectl delete rc mobile-signature
#kubectl delete pod mobile-signature-
kubectl delete svc mosquitto
kubectl delete rc mosquitto
```
### Failover
Pull a cable from a slave
```
$ kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE NODE
busybox-iown8 1/1 Running 0 6m 192.168.1.5
k8s-master-127.0.0.1 3/3 Running 6 4d 127.0.0.1
mobile-signature-zflym 1/1 Running 0 6m 192.168.1.5
signature-map-14zj2 1/1 Running 0 6m 192.168.1.5
```
Wait about 2 minutes
```
$ kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE NODE
busybox-8ecog 1/1 Running 0 3m 127.0.0.1
k8s-master-127.0.0.1 3/3 Running 6 4d 127.0.0.1
mobile-signature-ctswr 1/1 Running 0 3m 127.0.0.1
signature-map-3l1zj 1/1 Running 0 3m 127.0.0.1
```
### Docker
Start web apps using docker command.
```
docker run -p 3300:3300 -it -e MQTT_BROKER=mqtt://192.168.1.2 simagix/mobile-signature-rpi
docker run -p 3301:3301 -it -e MQTT_BROKER=mqtt://192.168.1.2 simagix/signature-map-rpi
```