Build a Kubernetes cluster using Ansible with kubeadm. The goal is easily install a Kubernetes cluster on machines running Ubuntu 16.04, CentOS 7.
System requirement:
- Deploy node must be install
Ansible v2.4.0+. - All Master/Node should have password-less access from Deploy node.
Add the system information gathered above into a file called inventory. For example:
[master]
192.16.35.12
[node]
192.16.35.[10:11]
[kube-cluster:children]
master
node
After going through the setup, run the site.yml playbook:
$ ansible-playbook site.yml
...
==> master1: TASK [addon : Create Kubernetes dashboard deployment] **************************
==> master1: changed: [192.16.35.12 -> 192.16.35.12]
==> master1:
==> master1: PLAY RECAP *********************************************************************
==> master1: 192.16.35.10 : ok=18 changed=14 unreachable=0 failed=0
==> master1: 192.16.35.11 : ok=18 changed=14 unreachable=0 failed=0
==> master1: 192.16.35.12 : ok=34 changed=29 unreachable=0 failed=0Verify cluster is fully running using kubectl:
$ export KUBECONFIG=~/admin.conf
$ kubectl get node
NAME STATUS AGE VERSION
master1 Ready 22m v1.6.3
node1 Ready 20m v1.6.3
node2 Ready 20m v1.6.3
$ kubectl get po -n kube-system
NAME READY STATUS RESTARTS AGE
etcd-master1 1/1 Running 0 23m
...Finally, reset all kubeadm installed state using reset-site.yml playbook:
$ ansible-playbook reset-site.yml