Creating Microservices Deployments

There are three nodes in the cluster:

• kserver1 (etcd, controlplane)
• kserver2 (etcd, controlplane, worker)
• kserver3 (etcd, worker)

Docker Installation

We are going to install Docker by official documentation: https://docs.docker.com/engine/install/ubuntu/

• Uninstall old versions

sudo apt remove docker docker-engine docker.io containerd runc

• Install packages to allow apt to use a repository over HTTPS:

sudo apt 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 -

• Set up the repository

sudo apt-key fingerprint 0EBFCD88
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"

• Install Docker Engine

sudo apt update
sudo apt install docker-ce docker-ce-cli containerd.io

Nodes configuration

Enable iptables Filtering on Bridge Devices net.bridge.bridge-nf-call-iptables on all three nodes.

sudo cat << EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables = 1
EOF

sudo sysctl -p

Turn off swap on all servers.

sudo swapoff -a
sudo vi /etc/fstab

Kubectl installation

• Set up the repository

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

• Install kubectl

sudo apt update
apt install -y kubectl=1.15.7-00

Thank you for reading!

Rancher Deployment

Deploy Rancher.

docker run -d --name rancher --privileged --restart=unless-stopped -p 80:80 -p 443:443 rancher/rancher:stable

Check nodes status.

kubectl get node

Generate and apply SSL certificates.

openssl req -x509 -nodes -days 1095 -newkey rsa:2048 -keyout thalamus.key -out thalamus.crt
kubectl create secret tls thalamus-tls --cert=thalamus.cert --key=thalamus.key

Clone Kubernetes manifests and apply kubernetes-manifests-ingress.yaml

git clone [email protected]:Thalamus-am/microservices-demo.git
cd microservices-demo/release/
kubectl apply -f kubernetes-manifests-ingress.yaml