Installation

Kubernetes version 1.6.6 will be installed (1.6.7 is the latest version that is supported), this version was chosen so that we can demonstrate the upgrade process to 1.6.7.

N.B Version 1.7 will soon be supported officially by the kubespray team.

Create the inventory file /root/kubespray/inventory/inventory.cfg :

[kube-master]
kubemaster

[etcd]
kubemaster
nautsworker1
nautsworker2

[kube-node]
nautsworker1
nautsworker2

[k8s-cluster:children]
kube-node
kube-master

Set the Kubernetes version to install by editing the group variables file /root/kubespray/inventory/group_vars/k8s-cluster.yml

## Change this to use another Kubernetes version, e.g. a current beta release
kube_version: v1.6.6

Set the CNI plugin to use by editing the group variables file /root/kubespray/inventory/group_vars/k8s-cluster.yml, I am using the default which is Calico:

# Choose network plugin (calico, weave or flannel)
kube_network_plugin: calico

Start deploying the cluster with the inventory file (assuming in the kubespray folder), then you can come back after 20 - 30 minutes depending on your specific hardware specification:

ansible-playbook -b -i inventory/inventory.cfg cluster.yml

Sample output when deployment is done:

PLAY RECAP ********************************************************************************************************************************************************************************
kubemaster                 : ok=392  changed=101  unreachable=0    failed=0   
localhost                  : ok=3    changed=0    unreachable=0    failed=0   
nautsworker1               : ok=390  changed=105  unreachable=0    failed=0   
nautsworker2               : ok=359  changed=93   unreachable=0    failed=0   

Monday 07 August 2017  13:51:53 +0100 (0:00:00.032)       0:21:23.449 ********* 
=============================================================================== 
download : Download containers if pull is required or told to always pull - 180.73s
kubernetes/preinstall : Install packages requirements ----------------- 150.30s
download : Download containers if pull is required or told to always pull -- 60.75s
docker : ensure docker packages are installed -------------------------- 35.38s
download : Download containers if pull is required or told to always pull -- 26.70s
download : Download containers if pull is required or told to always pull -- 18.47s
download : Download containers if pull is required or told to always pull -- 16.75s
download : Download containers if pull is required or told to always pull -- 16.68s
download : Download containers if pull is required or told to always pull -- 12.97s
download : Download containers if pull is required or told to always pull -- 12.83s
kubernetes/preinstall : Update package management cache (YUM) ---------- 12.28s
download : Download containers if pull is required or told to always pull -- 11.76s
download : Download containers if pull is required or told to always pull -- 10.82s
docker : Docker | pause while Docker restarts -------------------------- 10.04s
download : Download containers if pull is required or told to always pull --- 8.98s
kubernetes/master : Master | wait for the apiserver to be running ------- 6.43s
download : Download containers if pull is required or told to always pull --- 6.41s
network_plugin/calico : Calico | Copy cni plugins from calico/cni container --- 6.34s
kubernetes/master : Copy kubectl from hyperkube container --------------- 6.12s
network_plugin/calico : Calico | Copy cni plugins from hyperkube -------- 3.91s