Yi-Hsiangf / Cloud-Computing-application

Cloud-Computing-application

1. Online Library App implemented by node.js

Installation (Nodejs)

wget -qO- https://deb.nodesource.com/setup_10.x | sudo -E bash -
sudo apt-get install -y nodejs
sudo apt-get install -y build-essential

Start MongoDB

mongod --dbpath=./data

Start Node.js APP

npm install
sudo node server.js

2. Application Deployment Using Docker (Library app)

Install Docker

Docker Installation (use this official steps only): https://docs.docker.com/install/linux/docker-ce/ubuntu/
Docker Compose Installation: https://docs.docker.com/compose/install/#prerequisites

Running and testing the Application

# 1. Do the changes to the application on your local laptop/computer.
# 2. Check the application is running or not locally.
sudo docker-compose up –build
# If everything is working correctly now :
# 1. Create a repository on docker hub.
# 2. Login to your hub account using the command on your local machine :
sudo docker login
# ３. Push Images to docker hub (don’t forget to add your docker hub id and image name into docker-compose.yml file)
sudo docker-compose push
# ４. Copy the docker-compose.yml file to the VM and remove build line from it.
# ５. Run the application using docker-compose
sudo docker-compose up

3. Product Query Service implemented by Seneca.js

Microservice Architecture of the application

4. Application Deployment using Kubernetes (Product Service APP)

Install docker and Kubernetes

# 1. Install packages to allow apt to use a repository over HTTPS
sudo apt-get install \
apt-transport-https \
ca-certificates \
curl \
software-properties-common
# 2. Add Docker’s official GPG (GNU Privacy Guard) key:
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key
add -
# 3. Use the following command to set up the stable repository.
sudo add-apt-repository \
"deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
14
# 4. Switch to root user
sudo su root
# 5. Add Kubernetes repositories
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key
add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb http://apt.kubernetes.io/ kubernetes-xenial main
EOF
# 6. Switch to the normal user
su <orginal user name>
# 7. Update the apt package index.
sudo apt-get update
# 8. Install the latest version of Docker by using this command.
sudo apt-get install -y docker-ce
# 9. Installation kubeadm, kubernetes and kubectl
sudo apt-get install -y kubelet kubeadm kubernetes-cni

Using kubeadm to deploy kubernetes Cluster

Install Docker, Kubernetes, Kubeadm and Kubectl on Master and Slave nodes Initialize the Master Node using kubeadm init command (need to be run as root)

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

Before going forward, you should create a new user and add it to sudoers and run the following commands on it:

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

Check everything is running fine by running command

kubectl get nodes

Installing the Pod Network

kubectl apply -f
https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e41
4cf26827915/Documentation/kube-flannel.yml

Status Check

Check the status of pods run the following command

kubectl get pods --all-namespaces

Check the status of node using the command

kubectl get nodes

Deployment

deployment for the microservices using the command

kubectl apply -f kubernetes_files/deployments/< file_name>.yml

Check the status of all the pods in the deployments by running the command

kubectl get pods --all-namespaces

Check the status of deployments

kubectl get deployments --all-namespaces

Running containerized images

kubectl apply -f kubernetes_files/services/<file_name>.yml

Scaling the deployment

kubectl scale deployment <deployment_name> --replicas=<replicaNumber>

Deleting the Restting the Cluster

# To delete the service and deployment you can run the following command:
kubectl delete service,deployment <deployment_Name>
# Reset all kubeadm installed state, run the following command on master
kubeadm reset
# Delete the configuration file
sudo rm -r $HOME/.kube/config