Docker & K8s

1 Docker Installation
2 Docker-Compose Installation
3 Installing Kubernetes
3.1 Ubuntu
3.2 CentOs

1. Docker Installation - Documentation

1.1 Ubuntu

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository \
"deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
sudo apt-get update
sudo apt-get install -y docker-ce=18.06.1~ce~3-0~ubuntu
sudo apt-mark hold docker-ce

1.2 CentOs

sudo yum install -y yum-utils device-mapper-persistent-data lvm2
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
sudo yum install docker-ce

2. Docker-Compose Installation - Documentation

sudo curl -L https://github.com/docker/compose/releases/download/1.23.1/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker-compose --version

Blog

You can ready my blog on docker here

3. Installing Kubernetes - Documentation

3.1 Ubuntu

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -

create a file /etc/apt/sources.list.d/kubernetes.list

cat << EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF

Update the packages

sudo apt update

Install Kubernetes

sudo apt-get install -y kubelet=1.18.0-00 kubeadm=1.18.0-00 kubectl=1.18.0-00
sudo apt-mark hold kubelet kubeadm kubectl

Add the iptables rule to sysctl.conf:

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

Enable iptables:

sudo sysctl -p

Initialize the cluster (run only on the master):

sudo kubeadm init --pod-network-cidr=10.244.0.0/16

Set up local kubeconfig (run only on the master):

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

Join nodes with master. Run below command on nodes

kubeadm join <MASTER_NODE_IP>:6443 --token <TOKEN> \
    --discovery-token-ca-cert-hash <HASH>

Install Flannel CNI (run only on the master)

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

• Additional Configs

ToDO

3.2 CentOs

ToDo

* Install Kubernetes Dashboard

ToDo

* ToDo:
  * Add Sample Dockerfile and docker-compose file and explanation
  * Add kubernetes sample file and explanation