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====== Basic installation ======

On Centos7, RPMs are from Ceontos7 extras repository

1 master, 2 nodes

RPM verisons
  * On master:
    * kubernetes-master, kubernetes-client -  1.5.2-0.2.gitc55cf2b.el7
    * etc - 3.1.0-2.el7
    * flannel - 0.7.0-1.el7
  * On nodes:
    * kubernetes-client, kubernetes-node - 1.5.2-0.2.gitc55cf2b.el7

Services
  * On master:
    * etcd
    * kube-apiserver
    * kube-controller-manager
    * kube-scheduler
    * flanneld
  * On nodes:
    * kubelet
    * kube-proxy
    * flanneld

Hostnames, subnets, IP ranges
  * master and node IPs
    * master:  node-1(192.168.50.101/24)
    * nodes: node2(192.168.50.102/24), node-3(192.168.50.103/24)
    * kubernetes cluster IP range: 10.254.0.0/16
    * flannel: 172.30.0.0/16, subnetLen:24, type: vxlan

Ports
  * etcd: 2379
  * kube-apiserver: 8080
  * kubelet: 10250


First pod
<code>
$ kubectl run hello-node --image=gcr.io/google-samples/node-hello:1.0 --port=8080

$ kubectl get deployment hello-node
NAME         DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
hello-node   1         1         1            1           2d

$ kubectl get pods
NAME                          READY     STATUS    RESTARTS   AGE
hello-node-3526609615-5slx8   1/1       Running   0          2d

$ kubectl expose deployment hello-node

$ kubectl get service hello-node
NAME         CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-node   10.254.65.168   <nodes>       8080:32260/TCP   2d

$ kubectl get pods --selector="run=hello-node" --output=wide
NAME                          READY     STATUS    RESTARTS   AGE       IP            NODE
hello-node-3526609615-5slx8   1/1       Running   0          2d        172.30.65.2   node-2

$ curl http://node-2:32260
Hello Kubernetes!
</code>
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