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Kubernetes Networking

The Kubernetes Networking series consists of the following topics:

  1. Kubernetes Networking 101 (60 mins), you will use different ways to control traffic on a Kubernetes cluster with Service types, Ingress, Network Policy and Calico. Start here.
  2. Add Security to Routes on OpenShift (coming soon), you will use different types of TLS termination to secure Routes on OpenShift: edge, passthrough and reencrypt.
  3. Kubernetes Network Security using a Virtual Private Cloud (VPC) (90 mins), you will deploy a guestbook application to a Kubernetes cluster in a Virtual Private Cloud (VPC) Gen2, you will create the VPC, add a subnet, attach a public gateway, and update a security group with rules to allow inbound traffic to the guestbook application. Start here.
  4. Istio, use Istio to manage network traffic, load balance across microservices, enforce access policies, verify service identity, and more.

This series of workshops on Kubernetes Networking is accompanied by a lecture on Kubernetes Networking.

Kubernetes Networking is part of the series Kubernetes Security, which includes:

  1. Kubernetes Security,
  2. Kubernetes Networking,
  3. Kubernetes Storage,
  4. Kubernetes Automation (DevOps, IaC, CI/CD).

Next steps

Continue your learning by visiting the Istio workshop. With Istio, you can manage network traffic, load balance across microservices, enforce access policies, verify service identity, and more.

Prerequirementss

  • Free IBM Cloud account, to create a new IBM Cloud account go here.
  • Free Pay-As-You-Go account. To upgrade a free IBM Cloud account, go here.
  • CognitiveLabs.ai account, to access a client terminal at CognitiveLabs.ai, go here.
  • Kubernetes standard cluster v1.18 with at least 2 worker nodes on a VLAN, a subnet with public IPs, external LoadBalancer (for details about VLAN, subnets and IPs, see here ).

Go to Setup for more details.

Labs

  1. Lab1 Kubernetes Networking 101
    1. Setup
    2. Services
    3. ClusterIP
    4. NodePort
    5. Loadbalancer NLB
    6. ExternalName
    7. Ingress ALB
    8. Network Policy and Calico
  2. Lab2 Using a VPC
    1. Setup
    2. VPC Gen2

Technologies

This workshop was tested using the following technologies:

  • IBM Cloud Kubernetes Service (IKS) version 1.19, 2 worker nodes, flavor u3c.2x4
  • Calico client version v3.17.1
  • Calico cluster version v3.16.5
  • ibmcloud version 1.3.0
  • ibmcloud container-service/kubernetes-service 1.0.28
  • vpc-infrastructure/infrastructure-service 0.7.5
  • kubectl version 1.19

Contributors