kubernetes ala Ger:

1 Vagrantfile for provisioning 3 clean CentOS7 virtualbox vm's:

Vagrantfile:

- master.ger.test  (master-node)
- worker1.ger.test (worker-node)
- worker2.ger.test (worker-node)

kube-depencies.yml: installing kubernetes depencies on all the nodes:
master.yml        : containing the setup of the kubernetes-cluster on the master:
worker.yml        : containing setup of workers/joining the cluster

- /etc/hosts: host-file

hosts: ansible hosts info

Use:

provision nodes:

$ vagrant --instance=kubernetes 

install depencies:

$ ansible-playbook -i hosts ./kube-dependencies.yml

install master-node:

$ ansible-playbook -i hosts ./master.yml

install worker-nodes:

$ ansible-playbook -i hosts ./workers.yml

klaar:

$ ssh ger@master

[ger@master ~]$ kubectl get nodes
NAME               STATUS   ROLES    AGE   VERSION
master.ger.test    Ready    master   2d    v1.12.1
worker1.ger.test   Ready    worker   47h   v1.12.1
worker2.ger.test   Ready    worker   47h   v1.12.1

possilbe extras:

/etc/sysconfig/kubelet:  KUBELET_EXTRA_ARGS=--runtime-cgroups=/systemd/system.slice --kubelet-cgroups=/systemd/system.slice

label node: kubectl label node worker1.ger.test node-role.kubernetes.io/worker=worker