TypeError no implicit conversion of String into Integer
When we test a Chef cookbook in Chef Test Kitchen and get the error message TypeError ——— no implicit conversion of String into Integer Check if all attribute references have the “node” keyword in front of them.
Learn Kubernetes part 3 – Traefik Ingress Controller
In the previous post, Learn Kubernetes part 2 – NGINX Ingress Controller, we have deployed a web application and exposed it via the kubernetes/ingress-nginx ingress controller. In this exercise we will use Traefik, another popular proxy server.…
Learn Kubernetes part 2 – NGINX Ingress Controller
Large organizations need to control the incoming traffic to the Kubernetes cluster. The most secure way is to use an ingress controller and create an ingress to channel all incoming traffic to the cluster. In Learn Kubernetes part 1 – Web…
Kubernetes Dashboard
This is the official Kubernetes dashboard, and for security reasons currently it is not recommended to use, but we can still use it in our local cluster to inspect the resources. The latest installation information is at…
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…
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…
Helm
Helm takes values that we pass into the Helm deployments and transforms a template (also known as a chart) to Kubernetes resources. It is a wrapper around Kubernetes resources. It calls kubectl in the background to create the resources on the fly.
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…
Kubernetes Health Check
Kubernetes provides ways to check the health of pods. Liveness and Readiness Probes can monitor the health of the pods. We can specify an address in the pod what Kubernetes can curl and if 200 http response code is returned, the pod is considered healthy.
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…