Install highly available Redis with replication

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=v7.2.13
   

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=v7.2.13
   

   Note

   Mirantis recommends Redis 7.2.11 or later within 7.2.x branch. The validated versions are 7.2.11, 7.2.12, and 7.2.13. For the full list of available versions, see the redis-operator page.