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 Cilium

Cilium uses extended Berkeley Packet Filter (eBPF) filtering technology to ensure network connectivity across Kubernetes Services by adding high-level application rules. It manages operations and converts network definitions to eBPF applications as a cilium-agent daemon on each node of the Kubernetes cluster. Pods communicate with one another using an overlay network or a routing mechanism; for instance, both IPv4 and IPv6 addresses are supported. VXLAN tunneling is used for packet encapsulation in overlay networks, while native routing is done via the unencapsulated BGP protocol.

The eBPF Linux kernel feature allows for the dynamic insertion of sophisticated security visibility and control logic within Linux itself, as shown in the following diagram. Cilium security policies can be applied and modified without requiring any changes to the application code or container configuration because eBPF operates inside the Linux kernel. It also has HyperText Transfer...