syntax error, unexpected tLABEL in Chef Test Kitchen
During the test of a Chef recipe that contains a template we may encounter the error message syntax error, unexpected tLABEL MY_KEY: MY_VALUE Make sure there is no white space between the keyword variables and the opening parenthesis in the template…
How to remove all Docker containers and images from the host
Docker images are stored on the host to launch as fast as possible. The drawback is, Docker can fill the hard drive with unused images. A recent possible bug in Docker caused the accumulation of unused, unreferenced images on the host. To delete all…
Error: Error creating LB Listener: ValidationError: ‘arn:aws:elasticloadbalancing:….b’ must be in ARN format
We create a new AWS Application Load Balancer and get this error message when the second listener is created Error: Error creating LB Listener: ValidationError: ‘arn:aws:elasticloadbalancing:….’ must be in ARN format make sure the…
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.