Game of Pods - Redis cluster
KodeKloud Game of Pods Redis cluster challenge: deploy a 6-node Redis cluster with PersistentVolumes and a StatefulSet.
First, create the host directories on the worker node that will be used as PersistentVolume storage for each Redis instance.
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for i in {1..6}; do ssh node01 mkdir /redis0${i}; done
ssh node01 ls /redis*
The following manifests define six PersistentVolumes (one per Redis replica), a headless Service for cluster communication, and a StatefulSet that runs a 6-replica Redis cluster with ConfigMap-based configuration and persistent storage.
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for i in $(ls *.yaml); do echo filename: $i;echo "---" ;cat $i; done
filename: pv.yaml
---
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: redis01
spec:
capacity:
storage: 1Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
hostPath:
path: /redis01
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: redis02
spec:
capacity:
storage: 1Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
hostPath:
path: /redis02
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: redis03
spec:
capacity:
storage: 1Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
hostPath:
path: /redis03
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: redis04
spec:
capacity:
storage: 1Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
hostPath:
path: /redis04
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: redis05
spec:
capacity:
storage: 1Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
hostPath:
path: /redis05
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: redis06
spec:
capacity:
storage: 1Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Recycle
hostPath:
path: /redis06
filename: ss.yaml
---
apiVersion: v1
kind: Service
metadata:
name: redis-cluster-service
labels:
app: redis-cluster
spec:
ports:
- port: 6379
name: client
targetPort: 6379
- port: 16379
name: gossip
targetPort: 16379
clusterIP: None
selector:
app: redis-cluster
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: redis-cluster
spec:
selector:
matchLabels:
app: redis-cluster # has to match .spec.template.metadata.labels
serviceName: "redis-cluster-service"
replicas: 6 # by default is 1
template:
metadata:
labels:
app: redis-cluster # has to match .spec.selector.matchLabels
spec:
terminationGracePeriodSeconds: 10
volumes:
- name: conf
configMap:
name: redis-cluster-configmap
defaultMode: 0755
- name: data
persistentVolumeClaim:
claimName: data
containers:
- name: redis
env:
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
command: ["/conf/update-node.sh", "redis-server", "/conf/redis.conf"]
image: redis:5.0.1-alpine
ports:
- containerPort: 6379
name: client
- containerPort: 16379
name: gossip
volumeMounts:
- name: data
mountPath: /data
readOnly: false
- name: conf
mountPath: /conf
readOnly: false
volumeClaimTemplates:
- metadata:
name: data
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 1Gi
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