Kubernetes-leejay

zj2092

　　-bash-4.2# hostname

servera.pod0.example.com
　　-bash-4.2# curl -O http://cla***oom.example.com/materials/docker-images/webserver.tar.xz
　　-bash-4.2# curl -O http://cla***oom.example.com/materials/docker-images/db.tar.xz
　　-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>
rhel7               webserver           94dd54abd5e8        2.752324 years ago   411.5 MB　　
rhel7               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=http://127.0.0.1:4001"
　　KUBE_MASTER="--master=http://serverc.pod0.example.com:8080"

• 　　-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=http://serverc.pod0.example.com:4001"
  
  

  　　-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 http://serverc.pod0.example.com:4001/version
　　-bash-4.2# curl -s -L http://serverc.pod0.example.com:8080/version | python -mjson.tool
　　-bash-4.2# curl -s -L http://serverc.pod0.example.com:8080/api/v1beta1/minions
　　-bash-4.2# hostname

servera.pod0.example.com

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

　　#KUBE_ETCD_SERVERS="--etcd_servers=http://127.0.0.1:4001"
　　KUBE_MASTER="--master=http://serverc.pod0.example.com:8080"

• -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=http://serverc.pod0.example.com:8080"

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

　　KUBE_PROXY_ARGS="--master=http://serverc.pod0.example.com:8080"

• -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 http://servera.pod0.example.com:10250/healthz
　　-bash-4.2# hostname
　　serverc.pod0.example.com
　　-bash-4.2# curl -O http://cla***oom.example.com/materials/templates/webserver-service.yaml
　　-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 http://cla***oom.example.com/materials/templates/db-service.yaml
　　-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 http://cla***oom.example.com/materials/templates/webserver-pod.yaml
　　-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 http://cla***oom.example.com/materials/templates/db-pod.yaml
　　-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 http://servera.pod0.example.com/cgi-bin/action
　　-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 http://cla***oom.example.com/materials/docker-images/webserver.tar.xz
　　-bash-4.2# curl -O http://cla***oom.example.com/materials/docker-images/db.tar.xz
　　-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=http://127.0.0.1:4001"
　　KUBE_MASTER="--master=http://serverc.pod0.example.com:8080"

• -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=http://serverc.pod0.example.com:8080"

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

　　KUBE_PROXY_ARGS="--master=http://serverc.pod0.example.com:8080"

• -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 http://serverc.pod0.example.com:4001/v2/keys/coreos.com/network/config -XPUT --data-urlencode value@flannel-config.json
　　-bash-4.2# curl -L http://serverc.pod0.example.com:4001/v2/keys/coreos.com/network/config

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

　　FLANNEL_ETCD="http://172.25.0.12:4001"
　　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="http://172.25.0.12:4001"
　　FLANNEL_OPTIONS="eth0"

　　-bash-4.2# hostname
　　serverb.pod0.example.com

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

　　FLANNEL_ETCD="http://172.25.0.12:4001"
　　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 http://serverc.pod0.example.com:4001/v2/keys/coreos.com/network/subnets | 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 http://cla***oom.example.com/materials/templates/webserver-rc.yaml

• -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 http://cla***oom.example.com/materials/templates/db-rc.yaml

• -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 http://servera.pod0.example.com/cgi-bin/action
　　modify webserver-rc.yaml and increase the replicas count to 2
　　kubectl update -f webserver-rc.yaml
　　kubectl describe po POD_ID