Book Image

IoT Edge Computing with MicroK8s

By : Karthikeyan Shanmugam
Book Image

IoT Edge Computing with MicroK8s

By: Karthikeyan Shanmugam

Overview of this book

Are you facing challenges with developing, deploying, monitoring, clustering, storing, securing, and managing Kubernetes in production environments as you're not familiar with infrastructure technologies? MicroK8s - a zero-ops, lightweight, and CNCF-compliant Kubernetes with a small footprint is the apt solution for you. This book gets you up and running with production-grade, highly available (HA) Kubernetes clusters on MicroK8s using best practices and examples based on IoT and edge computing. Beginning with an introduction to Kubernetes, MicroK8s, and IoT and edge computing architectures, this book shows you how to install, deploy sample apps, and enable add-ons (like DNS and dashboard) on the MicroK8s platform. You’ll work with multi-node Kubernetes clusters on Raspberry Pi and networking plugins (such as Calico and Cilium) and implement service mesh, load balancing with MetalLB and Ingress, and AI/ML workloads on MicroK8s. You’ll also understand how to secure containers, monitor infrastructure and apps with Prometheus, Grafana, and the ELK stack, manage storage replication with OpenEBS, resist component failure using a HA cluster, and more, as well as take a sneak peek into future trends. By the end of this book, you’ll be able to use MicroK8 to build and implement scenarios for IoT and edge computing workloads in a production environment.
Table of Contents (24 chapters)
1
Part 1: Foundations of Kubernetes and MicroK8s
4
Part 2: Kubernetes as the Preferred Platform for IOT and Edge Computing
7
Part 3: Running Applications on MicroK8s
14
Part 4: Deploying and Managing Applications on MicroK8s
21
Frequently Asked Questions About MicroK8s

Configuring Flannel CNI

Flannel is one of the most mature open source CNI projects for Kubernetes, developed by CoreOS. Flannel is a simple network model that may be used to cover the most common Kubernetes network configuration and management scenarios. It functions by building an overlay network that assigns an internal IP address subnet to each Kubernetes cluster node. The leasing and maintenance of subnets are handled by the flanneld daemon agent, which is packaged as a single binary for easy installation and configuration on Kubernetes clusters and distributions.

Disabling the HA cluster to enable the Flannel add-on

To set Flannel as the CNI, the high availability (HA) cluster must be disabled to set the CNI as Flannel. The following command execution output confirms that the HA cluster is disabled and Flannel CNI is set:

Figure 6.37 – Disabling the HA cluster to set Flannel CNI

Now that Flannel CNI is set up, we can deploy a sample application...