The k8s-redis-ha's intro from sadminriley

k8s-redis-ha's Introduction

Redis High Availability deployment with Kubernetes

Docker images for Redis and Sentinel
Kubernetes configuration

Usage

Build and push images

If you want to push images closer location to your cluster for such as asia.gcr.io:

$ docker build -t asia.gcr.io/your-project-id/redis-ha-server:3.2.8 images/server
$ docker push asia.gcr.io/your-project-id/redis-ha-server:3.2.8

$ docker build -t asia.gcr.io/your-project-id/redis-ha-sentinel:3.2.8 images/sentinel
$ docker push asia.gcr.io/your-project-id/redis-ha-sentinel:3.2.8

Create kubernetes resources

$ kubectl create namespace ruby-app # <-- replace with your app's namespace
namespace "ruby-app" created
$ kubeclt apply -f kube --namespace=ruby-app
configmap "redis-config" created
configmap "sentinel-config" created
service "redis-ha" created
statefulset "rds" created

Client access example

Redis-rb supports sentinel.

SENTINELS = [
  {:host => "rds-0.redis-ha.ruby-app.svc.cluster.local", :port => 26379},
  {:host => "rds-1.redis-ha.ruby-app.svc.cluster.local", :port => 26379},
  {:host => "rds-2.redis-ha.ruby-app.svc.cluster.local", :port => 26379},
]

redis = Redis.new(
  host: 'ha-master' # the gem uses 'host' param as master name
  sentinels: SENTINELS, role: :master,
  timeout: 10, connect_timeout: 15
)