-bash-4.2# hostname

servera.pod0.example.com

-bash-4.2# curl -O

-bash-4.2# curl -O -bash-4.2# docker load -i webserver.tar.xz -bash-4.2# docker load -i db.tar.xz-bash-4.2# docker images

REPOSITORY          TAG                 IMAGE ID            CREATED              VIRTUAL SIZErhel7               webserver           94dd54abd5e8        2.752324 years ago   411.5 MBrhel7               db                  561488c47869        2.752326 years ago   572.1 MB

-bash-4.2# hostname

serverc.pod0.example.com

• -bash-4.2# vi /etc/kubernetes/controller-manager

KUBELET_ADDRESSES="--machines=servera.pod0.example.com"

• -bash-4.2# vi /etc/kubernetes/config

#KUBE_ETCD_SERVERS="--etcd_servers="

KUBE_MASTER="--master="

• -bash-4.2# vi /etc/kubernetes/apiserver

  KUBE_API_ADDRESS="--address=0.0.0.0"

  #KUBE_MASTER="--master=127.0.0.1:8080"

  KUBE_SERVICE_ADDRESSES="--portal_net=192.168.100.0/24"

  KUBE_ETCD_SERVERS="--etcd_servers="

  -bash-4.2# for SERVICE in etcd kube-apiserver kube-controller-manager kube-scheduler

  do

  systemctl restart ${SERVICE}

  systemctl enable ${SERVICE}

  systemctl status ${SERVICE}

  done

-bash-4.2# curl -s -L

-bash-4.2# curl -s -L | python -mjson.tool-bash-4.2# curl -s -L

-bash-4.2# hostname

servera.pod0.example.com

• -bash-4.2# vi /etc/kubernetes/config

#KUBE_ETCD_SERVERS="--etcd_servers="

KUBE_MASTER="--master="

• -bash-4.2# vi /etc/kubernetes/kubelet

KUBELET_ADDRESS="--address=0.0.0.0"

KUBELET_HOSTNAME="--hostname_override=servera.pod0.example.com"

KUBELET_ARGS="--auth_path=/var/lib/kubelet/auth"

KUBE_ETCD_SERVERS="--api_servers="

• -bash-4.2# vi /etc/kubernetes/proxy

KUBE_PROXY_ARGS="--master="

• -bash-4.2# echo "{}" > /var/lib/kubelet/auth

-bash-4.2# for SERVICE in docker kube-proxy kubelet

do

systemctl restart ${SERVICE}

systemctl enable ${SERVICE}

systemctl status ${SERVICE}

done

-bash-4.2# hostname

serverc.pod0.example.com

-bash-4.2# kubectl get minions

-bash-4.2# curl

-bash-4.2# hostname

serverc.pod0.example.com-bash-4.2# curl -O -bash-4.2# vi webserver-service.yaml

id: "webserver-service"

kind: "Service"

apiVersion: "v1beta1"

port: 80

publicIPs:

- 172.25.0.10

selector:

name: "webserver"

labels:

name: "webserver"

-bash-4.2# kubectl create -f webserver-service.yaml

-bash-4.2# curl -O -bash-4.2# vi db-service.yaml

id: "db-service"

kind: "Service"

apiVersion: "v1beta1"

port: 3306

selector:

name: "db"

labels:

name: "db"

-bash-4.2# kubectl create -f db-service.yaml

-bash-4.2# kubectl get services

-bash-4.2# curl -O

-bash-4.2# vi webserver-pod.yaml

id: "webserver"

kind: "Pod"

apiVersion: "v1beta1"

desiredState:

manifest:

version: "v1beta1"

containers:

• name: "apache-frontend"
  image: "rhel7:webserver"
  ports:
• containerPort: 80
  hostPort: 80
  labels:
  name: "webserver"

-bash-4.2# kubectl create -f webserver-pod.yaml

-bash-4.2# curl -O

-bash-4.2# vi db-pod.yaml

id: "db"

kind: "Pod"

apiVersion: "v1beta1"

desiredState:

manifest:

version: "v1beta1"

containers:

• name: "mariadb"
  image: "rhel7:db"
  ports:
• containerPort: 3306
  labels:
  name: "db"

-bash-4.2# kubectl create -f db-pod.yaml

-bash-4.2# kubectl get pods

-bash-4.2# hostname

servera.pod0.example.com-bash-4.2# docker ps

[root@workstation ~]# curl

-bash-4.2# hostname

serverc.pod0.example.com

-bash-4.2# kubectl delete services

-bash-4.2# kubectl delete pods

-bash-4.2# hostname

serverc.pod0.example.com

• -bash-4.2# vi /etc/kubernetes/controller-manager

  KUBELET_ADDRESSES="--machines=servera.pod0.example.com,serverb.pod0.example.com"

-bash-4.2# for service in etcd kube-apiserver kube-controller-manager kube-scheduler

do

systemctl restart $service

systemctl enable $service

systemctl status $service

done

-bash-4.2# hostname

serverb.pod0.example.com-bash-4.2# cd /var/tmp/-bash-4.2# curl -O -bash-4.2# curl -O -bash-4.2# docker load -i webserver.tar.xz -bash-4.2# docker load -i db.tar.xz

• -bash-4.2# vi /etc/kubernetes/config

#KUBE_ETCD_SERVERS="--etcd_servers="

KUBE_MASTER="--master="

• -bash-4.2# vi /etc/kubernetes/kubelet

KUBELET_ADDRESS="--address=0.0.0.0"

KUBELET_HOSTNAME="--hostname_override=serverb.pod0.example.com"

KUBELET_ARGS="--auth_path=/var/lib/kubelet/auth"

KUBE_ETCD_SERVERS="--api_servers="

• -bash-4.2# vi /etc/kubernetes/proxy

KUBE_PROXY_ARGS="--master="

• -bash-4.2# echo "{}" > /var/lib/kubelet/auth

-bash-4.2# for service in docker kube-proxy kubelet

do

systemctl restart $service

systemctl enable $service

systemctl status $service

done

-bash-4.2# hostname

serverc.pod0.example.com-bash-4.2# kubectl get minions

-bash-4.2# hostname

servera.pod0.example.com-bash-4.2# systemctl status kubelet

-bash-4.2# hostname

serverb.pod0.example.com-bash-4.2# systemctl status kubelet

servera|serverb|serverc|#rpm -q flannel

-bash-4.2# hostname

serverc.pod0.example.com

-bash-4.2# vi flannel-config.json

{

"Network":"10.50.0.0/16",

"SubnetLen":24,

"Backend":{

"Type":"vxlan",

"VNI":1

}

}

-bash-4.2# curl -L -XPUT --data-urlencode value@flannel-config.json

-bash-4.2# curl -L

• -bash-4.2# vi /etc/sysconfig/flanneld

FLANNEL_ETCD=""

FLANNEL_OPTIONS="eth0"

-bash-4.2# systemctl restart flanneld

-bash-4.2# systemctl enable flanneld-bash-4.2# systemctl status flanneld

-bash-4.2# ip link show flannel.1

-bash-4.2# hostname

servera.pod0.example.com

-bash-4.2# vi /etc/sysconfig/flanneld

FLANNEL_ETCD=""

FLANNEL_OPTIONS="eth0"

-bash-4.2# hostname

serverb.pod0.example.com

• -bash-4.2# vi /etc/sysconfig/flanneld

FLANNEL_ETCD=""

FLANNEL_OPTIONS="eth0"

servera and serverb exec blow

-bash-4.2# systemctl restart flanneld-bash-4.2# systemctl enable flanneld-bash-4.2# systemctl status flanneld-bash-4.2# curl -L | python -mjson.tool

-bash-4.2# hostname

serverc.pod0.example.com-bash-4.2# kubectl create -f webserver-service.yaml-bash-4.2# kubectl create -f db-service.yaml

-bash-4.2# curl -O

• -bash-4.2# vi webserver-rc.yaml

id: "webserver-controller"

kind: "ReplicationController"

apiVersion: "v1beta1"

desiredState:

replicas: 1

replicaSelector:

selectorname: "webserver"

podTemplate:

desiredState:

manifest:

version: "v1beta1"

containers:

• name: "apache-frontend"
  image: "rhel7:webserver"
  ports:
• containerPort: 80
  hostPort: 80
  labels:
  name: "webserver"
  selectorname: "webserver"
  uses: "db"
  labels:
  name: "webserver-controller"

-bash-4.2# kubectl create -f webserver-rc.yaml

-bash-4.2# curl -O

• -bash-4.2# vi db-rc.yaml

id: "db-controller"

kind: "ReplicationController"

apiVersion: "v1beta1"

desiredState:

replicas: 1

replicaSelector:

selectorname: "db"

podTemplate:

desiredState:

manifest:

version: "v1beta1"

containers:

• name: "mariadb"
  image: "rhel7:db"
  ports:
• containerPort: 3306
  labels:
  name: "db"
  selectorname: "db"
  labels:
  name: "db-controller"

-bash-4.2# kubectl create -f db-rc.yaml

[root@workstation ~]# curl

modify webserver-rc.yaml and increase the replicas count to 2

kubectl update -f webserver-rc.yaml

kubectl describe po POD_ID