Install highly available Redis

1. Install the Redis Operator from the OT-Container-Kit Helm repository:

   helm install redis-operator redis-operator \
     --repo https://ot-container-kit.github.io/helm-charts
   

2. Generate a strong, random password for authenticating with Redis:

   PASSWORD=$(LC_ALL=C tr -dc A-Za-z0-9 </dev/urandom | head -c 24)
   

3. Create a Kubernetes secret to securely store the password:

   kubectl create secret generic msr-redis-secret \
     --from-literal=REDIS_PASSWORD=${PASSWORD}
   

4. Deploy the Redis instance:

   Note

   Set clusterSize to the desired number of Redis nodes.

   helm install msr-redis redis-replication \
     --repo https://ot-container-kit.github.io/helm-charts \
     --set redisReplication.clusterSize=3 \
     --set redisReplication.redisSecret.secretName=msr-redis-secret \
     --set redisReplication.redisSecret.secretKey=REDIS_PASSWORD \
     --set redisReplication.image=quay.io/opstree/redis \
     --set redisReplication.tag=v8.2.2
   

5. Retrieve the connection details for the Redis service:

   Get the service’s port number:

   kubectl get svc msr-redis -o jsonpath={.spec.ports..port}
   

Upgrade highly available Redis

1. Verify Redis version:

   kubectl get pod <Redis pod> -o jsonpath='{.spec.containers[*].image}'
   

2. Upgrade Redis:

   helm upgrade msr-redis redis-replication \
     --repo https://ot-container-kit.github.io/helm-charts \
     --set redisReplication.clusterSize=3 \
     --set redisReplication.redisSecret.secretName=msr-redis-secret \
     --set redisReplication.redisSecret.secretKey=REDIS_PASSWORD \
     --set redisReplication.image=quay.io/opstree/redis \
     --set redisReplication.tag=v8.2.2
   

   Note

   Mirantis recommends installing Redis version 8.2.2 or the latest validated release. For more options, refer to the official redis-operator page.