How do I deploy Redis in Kubernetes?

How do I deploy Redis in Kubernetes?

How to Deploy Redis Cluster on Kubernetes

1. A Kubernetes cluster consisting of two or more nodes.
2. Create a Redis pod manifest.
3. Check pod status.
4. Enter the created pod with kubectl exec .
5. Use the PING command to check if the server is online.
6. If the server communicates with the console, it returns PONG as the answer.

How Redis works in Kubernetes?

The Redis Enterprise Kubernetes Operator manages the cluster custom resource by automating the deployments and configuration of the Kubernetes primitives, scaling, upgrades, and recoveries of Redis Enterprise cluster elements—things that a human admin would do are delegated to the Redis Enterprise Operator.

How will you create a deployment in Kubernetes using Yaml file?

Kubernetes tutorial – Create deployments using YAML file

1. Step #1.Create an nginx deployment.
2. Step #2.Create Deployment based on the YAML file.
3. Step #3.Create service.
4. Step #4.Deploy service.
5. Step #5.Update nginx deployment to have 4 replicas.
6. Step #6.Apply the updated nginx deployment to have 4 replicas.

What is the difference between StatefulSet and deployment?

A StatefulSet is another Kubernetes controller that manages pods just like Deployments. But it differs from a Deployment in that it is more suited for stateful apps. A stateful application requires pods with a unique identity (for example, hostname). One pod should be able to reach other pods with well-defined names.

How do I find my Redis key?

Try to look at KEYS command. KEYS * will list all keys stored in redis.

What port does Redis use?

Port 6379
By default, the Redis server runs on TCP Port 6379.

What is a deployment in Kubernetes?

A Kubernetes deployment is a resource object in Kubernetes that provides declarative updates to applications. A deployment allows you to describe an application’s life cycle, such as which images to use for the app, the number of pods there should be, and the way in which they should be updated.

What is a deployment YAML?

A deployment is an object in Kubernetes that lets you manage a set of identical pods. Without a deployment, you’d need to create, update, and delete a bunch of pods manually. With a deployment, you declare a single object in a YAML file.

What are different deployment strategies?

A deployment strategy is a way to change or upgrade an application. The aim is to make the change without downtime in a way that the user barely notices the improvements. The most common strategy is to use a blue-green deployment. The route based deployment strategies do not scale the number of pods in the services.

What are Redis keys?

Redis Keys are Ideal for Keeping Track of Lots of Strings. For the (simple string) key-value data type Redis allows you to set, get, delete, and increment arbitrary string pairs. You can only have 1 value at a time for each key (i.e. set is destructive assignment). You can also delete keys.

How to make Redis cluster more reliable with Kubernetes deployment?

There are additional measures that can be enabled in redis configuration to make sure we don’t loose any data like setting min-slaves-to-write and min-slaves-max-lag. With kubernetes deployment configured, redis cluster becomes even more reliable.

What is the use of Redis-Sentinel?

Redis-Sentinel is bundled with default redis package so we don’t need to install any thing separately. Sentinels are a group of (2n + 1) (recommended no. to form quorum, where n can be 1,2,3 and so on) processes which is responsible for monitoring the redis cluster and initiating failovers in case master goes down.

How to setup Redis HA cluster in Linux?

Typically, below are the steps we need to follow to setup redis HA cluster. Start first redis pod and store its cluster ip. We call this master. Start 3 sentinel pods in succession after configuring master’s ip in its configuration file. We then start slave pods either in succession or all at once.

What is master slave and Sentinel deployment in Kubernetes?

The master, slave and sentinel deployment makes sure that the cluster is always in desired state. The sentinel service is used by clients to connect to the master for writes and reads. It is important to note that here applications outside the kubernetes cluster cannot connect to this redis cluster as we are working with cluster ip.