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launch k8s cluster using vagrant box dreamcloud-centos7k8s

dreamcloud/centos7k8s is a docker/k8s ready box, here is demo to show how to launch a 2 nodes k8s cluster in few mins using vagrant.

tool set

  • vagant 2.0.1
  • virtualbox 5.1.30
  • cmder/msys64, I use portabledevops which seamless integrated with vagrant/virtualbox

prepare Vagrantfile

$ cd ~/vagrant/centos7k8stest
$ curl -LO https://raw.githubusercontent.com/robertluwang/docker-hands-on-guide/master/dreamcloud-vagrant/centos7k8s/Vagrantfile
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  2987  100  2987    0     0   7744      0 --:--:-- --:--:-- --:--:-- 14291

assume the k8s cluster setting:

  • centos7k8s-master 10.120.0.15
  • centos7k8s-node 10.120.0.16
  • vm memory: 1024
  • pod network: calico

you can change if you want except pod network in Vagrantfile.

launch k8s cluster from vagrant box

$ date;vagrant up;date
Mon, Jan 01, 2018 4:42:54 PM
Mon, Jan 01, 2018 4:45:37 PM

$ vagrant status
Current machine states:
centos7k8s-master running (virtualbox)
centos7k8s-node running (virtualbox)

k8s cluster launched in exactly 3 mins !

test k8s cluster

2 nodes cluster is ready now.

cluster nodes

[vagrant@centos7k8s-master ~]$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
centos7k8s-master Ready master 4m v1.9.0
centos7k8s-node Ready 1m v1.9.0

system pods

[vagrant@centos7k8s-master ~]$ kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-etcd-vhrj5 1/1 Running 0 4m
kube-system calico-kube-controllers-d669cc78f-rbpjs 1/1 Running 0 4m
kube-system calico-node-9vx9j 2/2 Running 0 4m
kube-system calico-node-wbgh2 2/2 Running 0 2m
kube-system etcd-centos7k8s-master 1/1 Running 0 3m
kube-system kube-apiserver-centos7k8s-master 1/1 Running 0 3m
kube-system kube-controller-manager-centos7k8s-master 1/1 Running 0 4m
kube-system kube-dns-6f4fd4bdf-4rrbx 0/3 Pending 0 4m
kube-system kube-proxy-b5rhq 1/1 Running 0 4m
kube-system kube-proxy-bjjgp 1/1 Running 0 2m
kube-system kube-scheduler-centos7k8s-master 1/1 Running 0 4m