#Kubernetes overview how to
#Kubernetes overview install
#Kubernetes overview full
#Kubernetes overview software
#Kubernetes overview code

Helm is a package manager for Kubernetes that can be used by developers and operators to easily package, configure, and deploy applications and services onto Kubernetes clusters.

Kubernetes is an open source container orchestration system that provides a platform to automate deployment, scaling, and management of application containers across clusters of hosts.

#Kubernetes overview software

Learn more Kubernetes best practices at our Learn Kubernetes page.In this release, we have implemented Cloud Native Unica using Docker, Kubernetes, and Helm.ĭocker is an open source software that makes it easy to create, deploy, and manage virtualized applications using containers.

#Kubernetes overview full

We also monitor over 20 AWS services in conjunction with Kubernetes, providing full coverage for your entire production environment with no alert configuration or tuning required. Blue Matador automatically checks for over 25 Kubernetes events out-of-the-box. If you are looking for a monitoring solution, consider Blue Matador. However, it can be hard to monitor Kubernetes with traditional tools.

#Kubernetes overview code

Each service can be backed with as many pods as needed without having to make your code aware of how each service is backed. Services make it really easy to create network services in Kubernetes. You specify the CNAME with the spec.externalName parameter. ExternalName- The service is mapped to a DNS name, not to a typical selector such as my-service or cassandra.This will create a publicly addressable set of IP addresses and a DNS name that can be used to access your cluster from an external source. LoadBalancer services will create an internal Kubernetes Service that is connected to a Load Balancer provided by your cloud provider (AWS, GCP, or Azure). LoadBalancer- The service is exposed as a load balancer in the cluster.When using NodePort services you must make sure that the selected port is not already opened on your nodes. The service can then be accessed externally at. NodePort- The service is exposed on a port on every node in the cluster.ClusterIP (default) - The service is not exposed outside the cluster, but can be addressed from within the cluster.The service type is set by using one of the following values for spec.type: There are four types of services that are defined by how they expose the service outside the cluster.

#Kubernetes overview install

Otherwise, you’ll have to install CoreDNS or kube-dns as an addon.Īt this point, your service is all set, and you’ll be able to access in other parts of your application! Types of services in Kubernetes If you’re running Kubernetes 1.11 or higher, your cluster will automatically have CoreDNS installed, which will allow you to access your service by using the service’s name. Of course, the whole purpose of creating a service is to make it possible to access a network service without having to know the pods it is running on.

#Kubernetes overview how to

How to communicate with a Kubernetes service In this example, the traffic for the user service might look like this in your cluster: You can now access your pods using the service. You should see your new service in the list of services returned by this command. To check that your service is running, you can execute the following command: kubectl get services Once you’ve got the configuration complete, create the service in your cluster by doing the following: kubectl apply -f service.yaml targetPort: the port on the pod that traffic should be sent to.port: the port that incoming traffic goes to.protocol: the network protocol to use with the port.Each port configuration consists of the following pieces:

spec.ports: list of port configurations.

In this case, any pod with the label app=user will be added to the service.

lector: what pods should be included in the Service.

This will be the DNS name of the Service when it is created.

metadata.name: the name of the service.

The YAML file consists of the following parts: Like everything else in Kubernetes, services can be configured using a YAML manifest: apiVersion: v1

All you need is some way to select the pods that belong to your service. Luckily, Kubernetes makes it really easy to define a service. This is useful because pods can be created and destroyed constantly, and without a service to make these pods accessible as a network service, you would need to implement a network discovery service to make calls between pods. What is a service in Kubernetes?Ī Kubernetes service groups a set of pods together and makes them accessible through the DNS name of the service. In this blog post, we’ll discuss what Services are, what they can be used for, and how to create them. Kubernetes has a lot of features and deployment options for running containers.