Network setup and create instance

Quickstarts > 4. Network setup and create instance

In this learning module, you will learn how to create, remotely access, and run a Linux-based web server on NHN Cloud. NHN Cloud makes it easy for anyone to build a reliable and efficient IT environment with a user-friendly interface and a variety of cloud resources.

Learning objectives

In this learning module, you'll learn to

• Create Instance
  • Create a Linux instance based on an Ubuntu server
  • Build a basic server environment
  • Detailed configuration, including instance type, key pair settings, security groups, and network settings.
• Network settings
  • Set up VPCs, subnets, and routing tables
• SSH Remote Access
  • Remote access to the created instance via SSH
• Install and run a web server
  • Installing and running a web server
    
    

Final configuration diagram

Before you begin

To get started with NHN Cloud, you'll need to prepare the following things

• Standard Internet browser
  • You must have the latest version of a browser installed, such as Google Chrome, Microsoft Edge, Firefox, or Safari.
  • JavaScript and cookies must be enabled in your browser settings.
• Internet connection environment
  • A stable internet connection is required, with a recommended bandwidth of at least 5 Mbps.
  • You must be able to communicate securely over HTTPS.
• Member account
  • You must have an NHN Cloud account with a registered payment method.
  • You must be logged in to the NHN Cloud portal.

This guide starts with the steps after 3. IAM accounts and governance.

Preparing to create an instance

Step 1. Enable basic infrastructure services

1. Once you're in the NHN Cloud console, make sure you've selected the organization(MyORG), project(MyPRJ), and Korea (Pyeongchon) regionfor your lab from the top menu.
2. Click Select a serviceto the right of MyPRJ.
3. Click Select a service, and then click Compute - Instance.
4. In the Activate service window, click OK.

Step 2. Basic Network Settings

Set the names of the basic network resources VPCs, subnets, and routing tables required for remote access to instances.

1. In the left menu, click Network - VPC.
2. Select Default Network (CIDR: 192.168.0.0/16) and click Change VPC.
3. In the Change VPC window, type the following and click OK.
   • Name: MyVPC
4. In the Success window, click OK.
5. In the left menu, click Network - Subnet.
6. Select Default Network (CIDR: 192.168.0.0/24), and then click Change subnet.
7. In the Change Subnet window, type the following and click OK.
   • Name: MySubnet
8. In the Success window, click OK.
9. In the left menu, click Network - Routing.
10. Select VPC-(random name value) and click Change Routing Table.
11. In the Change Routing Table window, type the following, and then click OK.
    • Name: MyRT
12. In the Success window, click OK.

Step 3. Create a Linux instance

1. In the left menu, click Compute - Instance.
2. Click Create instance.
3. In the Create Instance window, set the information below and click Create Instance.
   • Instance Templates
     • Enabled: Disabled
   • Image
     • Click Public Images > Image Name: Ubuntu Server 22.04 LTS (You can find this image at the bottom of the list of public images).
   • Instance information
     • Availability zones: Any availability zone.
     • Instance name: linux-server-basic
     • Instance Type: Click Select Inst ance Type > click Instance Type Name: t2.c1m1 (Classification: Standard, Type: t2, Name: t2.c1m1, vCPU: 1, Memory: 1GB) and click Select
     • Number of instances: 1
     • Click Keyfair > + Generate > Enter MyKey at the bottom of the keyfair selection > Generate keyfair > Click Download keyfair > Download MyKey.pem file
   • Root block storage
   • Block storage type: HDD
   • Block storage size (GB): 20 GB
   • Network settings: Select Create network interface
   • Network
     • Under Available subnets, click the MySubnet (192.168.0.0/24 ) resource to use it as the selected subnet.
   • Floating IP: Click Change settings
     • Enabled: Enabled
     • Erasure protection: Disabled
     • Subnet to connect to: MySubnet (192.168.0.0/24)
   • Security groups
     • Click Create security group
     • In the Create security group window, set the information below and click OK.
       • Name: MySG-SSH
       • Click + on Add security rule to add a security rule with the following settings
         • Direction: Incoming
         • IP protocol: SSH
           • Select the appropriate IP protocol and the port information is automatically filled in.

             [Note] Custom TCP

             • If you select "Custom TCP" as the IP protocol, you can enter your own port value. In the field labeled 1, enter 22.

         • Ether: IPv4
         • Remote: CIDR - 0.0.0.0/0
     • In the Success window, click OK
     • In the Security group selection, select MySG-SSHthat you created above
   • Additional block storage: Disabled (default)
   • User scripts: Blank (default)
   • Erasure protection: Disabled (default)
4. In the Instance creation information pane, click Create instance.
5. The instance creation operation proceeds. The instance will be created in a few minutes.

Connecting to an instance and running an Nginx web server

Step 1. Get an SSH remote connection

1. In the left menu, click Network - Floating IP.
2. Copy and recordthe IP address in the floating IP resource list where the connected device is linux-server-basic.
3. Set up an SSH remote connection for the user experience below.

If you're using Windows

• Click StartWindows, then search for and run Windows PowerShell.

• Navigate to the MyKey.pem folder, which is the keyfair you downloaded.

#Powershell
cd \(name of folder where MyKey.pem file is located)

• Initialize MyKey.pem permissions.

icacls MyKey.pem /reset

• Grant MyKey.pem permissions to the account of the user who ran PowerShell.

icacls MyKey.pem /grant:r "$($env:username):(r)"

• Disables the MyKey.pem file from inheriting permissions from the parent folder.

icacls MyKey.pem /inheritance:r

• Connect to the instance with an SSH command.

#PowerShell
ssh -i MyKey.pem ubuntu@copy linux-server-basic floating IP address

• Copy the IP address (this is the floating IP address you identified in the step above.)

• When you see "Are you sure you want to continue connecting (yes/no/[fingerprint])?", type yesand then press Enter.

• Use the lsb_release command to determine which version of Linux you are currently connected to.

#bash
lsb_release -a

If you're using macOS

• Launch the Terminal app from the Dock, or search for Terminalin Spotlight and launch it.

• Navigate to the MyKey.pem directory, which is the keyfair you downloaded.

#bash
cd /(name of directory where MyKey.pem file is located)

• Enter the command below to set the permissions for MyKey.pem.

chmod 600 MyKey.pem

• Connect to the instance with an SSH command.

#PowerShell
ssh -i MyKey.pem ubuntu@copy linux-server-basic floating IP address

• When you see "Are you sure you want to continue connecting (yes/no/[fingerprint])?", type yes and then press Enter.

• Use the lsb_release command to determine which version of Linux you are currently connected to.

#bash
lsb_release -a

Step 2. Get your web server up and running

• While remotely connected to the instance, enter the command below to install the Nginx web server.

#bash
sudo apt update -y
sudo apt install nginx -y

• Once the installation is complete, verify that your web server is up and running with the command below.

#bash
curl localhost

References

• Region Guide
• Compute Instance
• System Image
• VPC
• Subnet
• Floating IP
• CIDR
• Public-key encryption
• SSH
• VM
• Internet Gateway
• Nginx
• Webserver
• Linux
• Network Interface

Previous step

• 3. IAM accounts and governance

Next steps

• 5. Configure Security