Simple KUBE Cluster

Just a simple KUBE cluster procedure that seems to be repeatable……….

SET UP THE REPOSITORY
 
sudo apt-get update
$ sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common

Add Docker’s official GPG key:

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Verify that you now have the key with the fingerprint 9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88, by searching for the last 8 characters of the fingerprint.

$ sudo apt-key fingerprint 0EBFCD88

pub   rsa4096 2017-02-22 [SCEA]
      9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid           [ unknown] Docker Release (CE deb) <docker@docker.com>
sub   rsa4096 2017-02-22 [S]

Stable Repo
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

INSTALL DOCKER ENGINE

1. Update the apt package index, and install the latest version of Docker Engine and containerd, or go to the next step to install a specific version:

    $ sudo apt-get update
    $ sudo apt-get install docker-ce docker-ce-cli containerd.io
   
   allow to install

To install a specific version of Docker Engine, list the available versions in the repo, then select and install:

a. List the versions available in your repo:

apt-cache madison docker-ce

Install a specific version using the version string from the second column, for example, 5:18.09.1~3-0~ubuntu-xenial.

$ sudo apt-get install docker-ce=<VERSION_STRING> docker-ce-cli=<VERSION_STRING> containerd.io

I went ahead and installed the 18.06.1 version, base dont he tutorial I was following./

sudo apt-get install docker-ce=18.06.1~ce~3-0~ubuntu

let that unpack and install

Verify that Docker Engine is installed correctly by running the hello-world image.

$ sudo docker run hello-world

Install THe KUBE

I am installign this on Ubuntu
sudo apt-get update && sudo apt-get install -y apt-transport-https curl curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add - cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list deb https://apt.kubernetes.io/ kubernetes-xenial main EOF sudo apt-get update sudo apt-get install -y kubelet kubeadm kubectl sudo apt-mark hold kubelet kubeadm kubectl

Check Kubeadm version

$kubeadm version

Create CLuster

On the Kube master node, initialize the cluster:sudo kubeadm init --pod-network-cidr=10.244.0.0/16

mkdir -p $HOME/.kube

sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

sudo chown $(id -u):$(id -g) $HOME/.kube/config

Check kubectl version to verify server versiona and we are talkign to the API- with a repsonse from KUBECTL

Copy and Paste Join command to worker nodes

Use text editor to remove breaks

sudo kubeadm join 172.31.110.171:6443 --token 26ne6u.wnyj4ktndando9hv --discovery-token-ca-cert-hash sha256:4d8979ba8080e527d38740d855c2efd1a49ebd010e0273252ece815368e25f5b

return to master

kubectl get nodes

in not ready ststaus until we setup networking

setup networking using FLannel https://coreos.com/flannel/docs/latest/

echo "net.bridge.bridge-nf-call-iptables=1" | sudo tee -a /etc/sysctl.confsudo sysctl -p

permanently sets the value in etc on master

sudo sysctl -p

repeat these on worker nodes

Only on Control Node instyall Flannel

Install Flannel in the cluster by running this only on the Master node:
Pass in file from the internet download.

sudo kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

kubectl get nodes

It may take a few moments for all nodes to enter the Ready status, so if they are not all Ready, wait a few moments andtry again.It is also a good idea to verify that the Flannel pods are up and running. Run this command to get a list of system pods:kubectl get pods -n kube-systemYou should have three pods with flannel in the name, and all three should have a status of Running.kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/bc79dd1505b0c8681ece4de4c0d86c5cd2643275/Do