Connecting Kubernetes Clusters

Using Cilium CNI for cluster mesh and containerd for CRI

Requirements

• VirtualBox
• Vagrant
• kubectl
• Helm v3
• Ansible >= 2.10
  • Ansible Galaxy Collections:
    • community.kubernetes
• Make

Minimal machine requirements:

• Linux
• 16GB Ram
• 8 vCPUS

Requires VirtualBox network configured equals this example:

• Name: vboxnet0 CIDR: 192.168.10.1/24
• Name: vboxnet1 CIDR: 192.168.20.1/24

Scenario

Vagrant and VirtualBox is used to provide infrastructure. Ansible is used to provide installations and configurations in the clusters.

Clusters:

Name	Nodes	Kubeconfig
earth	master, node-1	clusters/earth/kube-config
mars	master, node-1	clusters/mars/kube-config

Setup

Create cluster and install Cilium and MetalLB components:

make

Destroy clusters:

make destroy

Test connective example:

$ kubectl -n kube-system exec -ti cilium-nwvdk -- cilium node list

Name           IPv4 Address    Endpoint CIDR   IPv6 Address   Endpoint CIDR
earth/master   192.168.10.10   10.2.0.0/24                    
earth/node-1   192.168.10.11   10.2.1.0/24                    
mars/master    192.168.20.10   10.4.0.0/24                    
mars/node-1    192.168.20.11   10.4.1.0/24

See More

• Cilium
  • Cluster Mesh
• CloudNativeCon 2018