Category: DEV

Simple Explanation Of Setting up AWS EC2(Ubuntu18.04)

1. Launch New Instance In AWS

On a EC2 Management Console page, launch instances and choose Ubuntu Server 18.04 LTS with adequate instance type.

I chose t2 micro Type and launched.

On the next page, click Edit security groups and open port 22, 80, 443 for the next step.

Before launch the instance, you should select an existing key pair or create a new one.

If you don’t have any, create a new one and download key pair.

You should keep that key pair safe and don’t let be exposed to anyone.

We need an elastic IP address(Non-change address) for our accessibility.

Elastic IP lasts forever even if you stop the instance unless you release the IP address.

EC2 -> Network & Security -> Elastic IPs -> Allocate Elastic IP address.

Associate Elastic IP address and Choose an instance to stick them together.

Half way there.

Now you have your own instance and elastic IP address.

Keep going.

2. Connect To The Server Using SSH Client

You can use any SSH Client whatever you want.

This time I chose XShell7 that is free for Home/School.

Go to Authentication, write User Name ‘ubuntu’ and check Method Public Key.

Click Connect.

Browse and select the key pair that we downloaded.

If you get this message, now you are in.

3. Install Nodejs On Ubuntu Server

$ curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash -

$ sudo apt-get install -y nodejs

Execute line by line and when it’s done, we can check by ‘node -v’ command.

If node version(v14.18.2 or something) is printed, installation is done.

4. Install MongoDB On Ubuntu Server

$ wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -

If you see ‘OK‘ return with above command, you are ready for the next step.

$ echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list

If you see ‘echo “deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.4 multiverse” | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list‘, move forward.

$ sudo apt-get update
$ sudo apt-get install -y mongodb-org

If you feel like something goes on a busy process, just wait.

When it’s done, check an installation with this command.

‘mongo -version’

Start mongodb service with this command.

$ sudo service mongod start

When successfully started, no message output.

$ mongo

> use admin

> db.createUser({ user:'id', pwd:'pwd', roles:[{"role":"userAdminAnyDatabase","db":"admin"},{"role":"readWriteAnyDatabase","db":"admin"}]})

exit

Have to change some codes for accessibility and security.

$ sudo vi /etc/mongod.conf

binIp : 127.0.0.1 -> bindIp: ::, 0.0.0.0

#security -> refer to above capture. no space before ‘enabled’ makes error.

save it!(‘wq’ command)

If you want to give a access try, use Compass with 27017 port opened.

5. Deploy(git clone)

Use Git, clone your project to your instance and install dependencies.

$ git clone https://github.com/id/repo

$ cd repo
$ npm install

6. Run Server With PM2

Install pm2 and run your own server.

pm2 makes your server keep running if you close the shell.

$ sudo npm install pm2 -g

$ sudo pm2 start index.js //in my case with arguement -> sudo pm2 start src/index.js --node-args="-r esm"

Now, your server won’t stop unless you stop the PM2.

You can check the PM2 status with below command.

$ sudo pm2 list

7. Install Nginx On Ubuntu Server

Nginx has additional functions that Nodejs do not have.

Simply in two ways, security and load balancing.

$ sudo apt-get install nginx

We opened port 80 for Nginx access.

When Nginx works, clients come in through Nginx door and Nginx leads them to internal port.

$ sudo service nginx start

When Nginx started, access it with your ip address.

Like http://3.34.65.190

Now, Change some codes as below with vi editor to complete Nginx work.

$ cd /etc/nginx/sites-enabled

sudo vi default

Comment out try_files $uri $uri/ =404; and add

    proxy_pass http://yourIP:port/;
    proxy_set_header Host $http_host;
    proxy_http_version 1.1;
    proxy_set_header X-Nginx-Proxy true;
    proxy_redirect off;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

proxy_pass takes clients to internal port that you set on Nodejs.

In my case, http://3.34.65.190:4000/;

Save it.

Next step is set a size limitation.

Nginx’s default file size setting is 1MB.

But if your page handles bigger than 1 MB files upload or download, this setting is necessary.

$ sudo vi /etc/nginx/nginx.conf

Now, restart Nginx.

sudo service nginx restart

Now you can access you page that you made.

8. SSL certificate with Let’s Encrypt(http ->https)

Using Route53 service, get a own domain and manage DNS.

Redirect to your IP address and when you have your own domain, you can get a SSL certification with Let’s Encrypt for free.

$ sudo add-apt-repository ppa:certbot/certbot

$ sudo apt install python-certbot-nginx

$ sudo certbot --nginx -d yourdomain.com

Follow the direction, and then your web can get a SSL certification and https protocol is available.

The direction is simple.

1. enter your email address

2. Agree

3. Yes(or No)

4. choose No.2 (redirect http to https option)

And that’s it.

Important thing for the last step is opening the port 443.

Port 443 is a port for https.

Restart Nginx and access with your domain address.

Automatically https will welcome you.

Every 90 days, certification renewal is required and below is the command.

$ sudo certbot renew --dry-run

AWS : aws.amazon.com