IMTI

Architecting, Developing, SRE, DevOps, AI/ML

Ingress on Custom Kubernetes

Setting up ingress-nginx on a custom cluster.

There are more than a handful of ways to set up port 80 and 443 web ingress on a custom Kubernetes cluster. Specifically a bare metal cluster. If you are looking to experiment or learn on a non-production cluster, but something more true to production than minikube, I suggest you check out my previous article Production Hobby Cluster, a step-by-step guide for setting up a custom production capable Kubernetes cluster.

This article builds on the Production Hobby Cluster guide. The following closely the official deploy ingress Installation Guide with a few adjustments suitable for the Production Hobby Cluster, specifically the use of a DaemonSet rather than a Deployment and leveraging hostNetwork and hostPort for the Pods on our DaemonSet. There are quite a few ingress nginx examples in the official repository if you are looking for a more specific implementation.

Posted by Craig Johnston Tuesday, May 15, 2018

Kubernetes - 413 Request Entity Too Large

Configuring the NGINX Ingress Controller

When setting up nginx ingress on Kubernetes for a private Docker Registry, I ran into an error when trying to push an image to it.

Error parsing HTTP response: invalid character '<' looking for beginning of value: "<html>\r\n<head><title>413 Request Entity Too Large</title></head>\r\n<body bgcolor=\"white\">\r\n<center><h1>413 Request Entity Too Large</h1></center>\r\n<hr><center>nginx/1.9.14</center>\r\n</body>\r\n</html>\r\n"

The “413 Request Entity Too Large” error is something many accustomed to running nginx as a standard web server/proxy. nginx is configured to restrict the size of files it will allow over a post. This restriction helps avoid some DoS attacks. The default values are easy to adjust in the Nginx configuration. However, in the Kubernetes world things are a bit different. I prefer to do things the Kubernetes way; however, there is still a lack of established configuration idioms, since part of its appeal is flexibility. One thousand different ways of doing something means ten thousand variations of remedies to every potential problem. Googling errors in the Kubernetes world leads to a mess of solutions not always explicitly tied to an implementation. I am hoping that as Kubernetes continues to gain popularity more care will be taken to provide context for solutions to common problems.

Posted by Craig Johnston Saturday, March 24, 2018

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I lead a talented team of software development and creative engineers, covering many industries looking to collect, analyze, move, buffer, queue, process and present data in significant ways. My expertise and that of my team revolve around microservices, artificial intelligence, algorithms, and machine learning.

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