Redis-Standalone Hands-on Guide on Kubernetes ②

Setup (create Pods)

1. Apply YAML files in order

1) Create Config

💻 Terminal

$ kubectl apply -f redis-config.yaml	➡ apply (create)
  configmap/redis-config created	➡ created
  configmap/redis-config configured	➡ changed
  configmap/redis-config unchanged	➡ unchanged
$ kubectl get configmap redis-config	➡ check
  NAME           DATA   AGE
  redis-config   2      38s  
* DATA 2 means redis.conf and users.acl.

2) Create Service

💻 Terminal

$ kubectl apply -f redis-service.yaml	➡ apply (create)
  service/redis-service created
$ kubectl get service redis-service	➡ check
  NAME            TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)     AGE
  redis-service   ClusterIP   None         <none>        18504/TCP   24s

3) Create StatefulSet

💻 Terminal

$ kubectl apply -f redis-statefulset.yaml	➡ apply (create)
  statefulset.apps/redis-created
$ kubectl get pods -o wide	➡ list Pods 🧮
  NAME    READY STATUS  RESTARTS AGE IP          NODE
  redis-0 1/1   Running 0        14s 10.42.0.220 rocky9

At this point one standalone Redis is running.

2. 🖧 Redis-Standalone Pod diagram

┌──────────────┐ │ Redis(220) │ │ 🟢Master │ └──────────────┘

3. 💽 Load data

To mimic production, load about 3 million keys. AOF load takes about 5 seconds.

💻 Terminal

$ kubectl exec -it redis-0 -- redis-benchmark -p 18504 -a redisgate -t set -d 100 -r 100000000 -n 3000000   
  ====== SET ======                                                     
    3000000 requests completed in 26.03 seconds
    50 parallel clients
    100 bytes payload
  Summary:
    throughput summary: 115233.92 requests per second
    latency summary (msec):
            avg       min       p50       p95       p99       max
          0.274     0.096     0.255     0.415     0.599     3.391

Check memory

💻 Terminal

$ kubectl top pod
  NAME     CPU(cores) MEMORY(bytes) 
  redis-0  2m         486Mi

➡ Pods are up and data is loaded. Next: failover testing.

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