try kube

trykube.sh

  
  
  https://www.youtube.com/watch?v=wHyRnO4UI5E
  
  https://www.youtube.com/watch?v=6xJwQgDnMFE
  https://blog.alexellis.io/kubernetes-in-10-minutes/
  
  
  
  
Install Docker
https://docs.docker.com/install/linux/docker-ce/ubuntu/#install-using-the-repository
  
Install Kubernetes apt repo
$ sudo apt-get update \
  && sudo apt-get install -y apt-transport-https \
  && curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
OK

$ echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" \
  | sudo tee -a /etc/apt/sources.list.d/kubernetes.list \
  && sudo apt-get update 
  
CNI stands for Container Networking Interface which is a spec that defines how network drivers should interact with Kubernetes

$ sudo apt-get update \
  && sudo apt-get install -y \
  kubelet \
  kubeadm \
  kubernetes-cni
  
$ sudo swapoff -a
$ sudo vi /etc/fstab


sudo kubeadm reset

sudo hostnamectl set-hostname k8s-master
sudo vi /etc/hostname
sudo kubeadm init --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=192.168.100.4 --kubernetes-version stable-1.12



# https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-token/ - 24h
# kubeadm token create
# kubeadm token list
sudo kubeadm join 192.168.100.4:6443 --token xqm72p.2vl2xdpufxfufrni --discovery-token-ca-cert-hash sha256:38b976c0ef3d62fc03d1432f6e456b8842491af209ecb223635ed7e11fc696d3
  
from HELP
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config


https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/ (Installing a pod network add-on)
sysctl net.bridge.bridge-nf-call-iptables=1
#kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/bc79dd1505b0c8681ece4de4c0d86c5cd2643275/Documentation/kube-flannel.yml
#kubectl apply -f https://raw.githubusercontent.com/romana/romana/master/containerize/specs/romana-kubeadm.yml




  sudo hostnamectl set-hostname k8s-slave1
  sudo kubeadm join 192.168.100.4:6443 --token kxi3ch.8wf6qo4t5z40lxo3 --discovery-token-ca-cert-hash sha256:7f8b4646da7a45a891044b79ee037ae6a110046b8aa9561452477fee27dec33f
  
  kubectl get all --namespace=kube-system
  
  
  NAME                                     READY   STATUS    RESTARTS   AGE
pod/coredns-576cbf47c7-dn6rb             1/1     Running   0          11m
pod/coredns-576cbf47c7-vk4d4             1/1     Running   0          11m
pod/etcd-k8s-master                      1/1     Running   0          11m
pod/kube-apiserver-k8s-master            1/1     Running   0          11m
pod/kube-controller-manager-k8s-master   1/1     Running   0          11m
pod/kube-proxy-c7g9g                     1/1     Running   0          11m
pod/kube-proxy-ws254                     1/1     Running   0          5m53s
pod/kube-scheduler-k8s-master            1/1     Running   0          11m
pod/weave-net-6pk5k                      2/2     Running   0          9m15s
pod/weave-net-98r4s                      2/2     Running   0          5m53s

NAME               TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE
service/kube-dns   ClusterIP   10.96.0.10   <none>        53/UDP,53/TCP   12m

NAME                        DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR   AGE
daemonset.apps/kube-proxy   2         2         2       2            2           <none>          12m
daemonset.apps/weave-net    2         2         2       2            2           <none>          9m15s

NAME                      DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/coredns   2         2         2            2           12m

NAME                                 DESIRED   CURRENT   READY   AGE
replicaset.apps/coredns-576cbf47c7   2         2         2       11m
  
  
  kubectl get nodes
  NAME         STATUS   ROLES    AGE     VERSION
  k8s-master   Ready    master   7m32s   v1.12.0
  k8s-slave1   Ready    <none>   69s     v1.12.0
  kubectl get pods
  
  
  
 # https://medium.com/@claudiopro/getting-started-with-kubernetes-via-minikube-ada8c7a29620
kubectl create hello-minikube --image=gcr.io/google_containers/echoserver:1.4 --port=8080
kubectl expose deployment hello-minikube --type=NodePort

$ kubectl get services
NAME             TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)          AGE
hello-minikube   NodePort    10.101.16.0   <none>        8080:30330/TCP   38s
kubernetes       ClusterIP   10.96.0.1     <none>        443/TCP          39m


navigate -> http://192.168.100.4:30330

kubectl delete service,deployment hello-minikube

# https://kubernetes.io/docs/reference/kubectl/docker-cli-to-kubectl/
  
  kubectl expose deployment nginx-app --name=nginx-http --port=80 --nodePort=9980 --type=NodePort  
  
  
  
  
  kubectl get events
  
  
  
  
  
  
  
  
# Create or modify /etc/docker/daemon.json on the client machine
# { "insecure-registries":["myregistrydomain.com:5000"] }
# DOCKER_OPTS="$DOCKER_OPTS --insecure-registry myregistrydomain.com:5000"
sudo service docker restart
sudo docker login -u admin -p admin https://myregistrydomain.com:5000
sudo cp ~/.docker/config.json /var/lib/kubelet/config.json