Troubleshooting Kubernetes Ingress-Nginx

Use the ingress-nginx Kubernetes plugin to troubleshoot the Kubernetes Ingress-Nginx. Install krew, the Kubernetes plugin manager. See https://github.com/kubernetes-sigs/krew See Kubernetes Ingress-Nginx Troubleshooting made Easy with kubectl plugins Verify the cluster you are connected to To switch to another cluster Get the address of the cluster Get the list of pods Forward a port to the …

Learn Kubernetes part 1 – Web application in a Kubernetes cluster

This is a tutorial to script a simple web application deployment in an enterprise grade Kubernetes cluster that you can follow on your Macintosh. You only need to install Docker and enable Kubernetes. The frontend of the web application is represented by an NGINX container that listens on port 80 and returns the NGINX default …

Kubernetes Ingress Controllers

For security reasons it is not a good practice to create individual load balancers for each service. The safer way is to create one application load balancer outside of the cluster and launch ingress controller NGINX containers to proxy the traffic to the individual services. Ingress “Ingress exposes HTTP and HTTPS routes from outside the …

Kubernetes Pods

A pod can contain one or multiple containers, usually one. Kubernetes only recommends to launch multiple containers in a pod, when those containers need to share a volume. For example a syslog-ng container saves log files in a volume, a Splunk Heavy Forwarder container monitors them and sends the log entries to the Splunk Indexer. …

Kubernetes Deployments

You only need a deployment to launch a container in Kubernetes. Deployments tell Kubernetes what container to run by specifying the Docker image name and tag spec: template: spec: containers: – image: when to pull the image from the registry spec: template: spec: containers: imagePullPolicy: If the image is always rebuilt with the same version, …

Working with Kubernetes in enterprise settings

How many Kubernetes clusters do I need? Clusters First, we want to separate the non-production and production environments: Create two Kubernetes clusters for every application or application suite. One for pre-production and one for production. Namespaces We also want to separate each non-production and production like environment. Kubernetes offers namespaces to create segregated areas, resources …

Kubernetes Services

Kubernetes Services route traffic across a set of pods. The service specifies how deployments (applications) are exposed to each other or the outside world. Service types The service type specifies how the deployment will be exposed ClusterIP The ClusterIP service is only visible within the cluster. To expose the pod to other services in the …