kubernetes

Getting Started 

Install SSH Server 

1. Type sudo apt-get install openssh-server

2. Enable the ssh service by typing sudo systemctl enable ssh

3. Start the ssh service by typing sudo systemctl start ssh

Trouble Shooting 

To determine whether hardware-enforced DEP is available, follow these steps:

Click Start, click Run, type cmd in the Open box, and then click OK.

At the command prompt, type the following command, and then press ENTER:

wmic OS Get DataExecutionPrevention_Available

If the output is "TRUE," hardware-enforced DEP is available.

To determine the current DEP support policy, follow these steps.

1. Click Start, click Run, type cmd in the Open box, and then click OK.

2. At the command prompt, type the following command, and then press ENTER:

3. wmic OS Get DataExecutionPrevention_SupportPolicy

Response table 

Set up local ip for host only interface for Virtual box 

edit file 

/etc/network/interfaces

add lines below to give static ip for each vm  even after machine boot

auto enp0s8

iface enp0s8 inet static 

         address 192.168.56.2

         netmask 255.255.255.0

Steps

• Spin up 3 nodes or vms   ( created Ubuntu 18 vm using spot instances  )

attached IAM policy to allow create network interfaces ,

added allow all tcp rule in security group , will figure out later specific rule

• install docker on each 

Install Docketr https://docs.docker.com/install/linux/docker-ce/ubuntu/

sudo apt-get update

sudo apt-get install \

    apt-transport-https \

    ca-certificates \

    curl \

    gnupg-agent \

    software-properties-common

    sudo add-apt-repository \

   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \

   $(lsb_release -cs) \

   stable"

   apt-cache madison docker-ce

sudo apt-get install docker-ce=18.06.3~ce~3-0~ubuntu 

sudo apt-get install docker-ce-cli=18.06.3~ce~3-0~ubuntu //did not work

sudo apt-get install  containerd.io

---------------------------- 

• initialize master 

install kunerneters 

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 -

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

• set up pod network 

---- set up cluster on master 

# Enable net.bridge.bridge-nf-call-iptables

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

sudo sysctl -p 

# Initialize the cluster and configure kubectl

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

# Install the flannel networking plugin

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e414cf26827915/Documentation/kube-flannel.yml

-----------------------------------------------

result 

1. join node 1 

2. join node 2 

Run on worker nodes 

sudo kubeadm join 172.31.19.123:6443 --token rwseci.8zcosw8dkods658c --discovery-token-ca-cert-hash sha256:0fadc62d6890fc18db59ed8a23ac7e132421cfba8f3b741d219d183d4c14887f

Docker login 

Save access token in a file amtoken to a folder security

navigate to dir 

cat ./amtoken | docker login --username <uname> --password-stdin