Create and attach storage

Quickstarts > 7. Create and attach storage

In this learning module, you will learn how to enable and use storage services through the NHN Cloud console. NHN Cloud's storage servicesprovide a reliable and scalable solution for storing and managing your data.

Learning objectives

In this learning module, you'll learn to

• Utilizing the Storage service
  • Object Storage vs. Block Storage differences and use cases
  • Create a Block Storage volume and associate it with an instance
  • Creating Object Storage containers and uploading and downloading objects
    
    

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 need to log in to the NHN Cloud homepage.

This guide starts after step 6. Create and connect to the database.

Creating block storage and retrieving data

Create a block storage, connect it to a Linux instance, and query the data in the block storage.

Step 1. Create block storage and connect to a Linux instance

Attach the block storage resource to theLinux instance linux-server-basicthat you created in Module 3.

1. Click Storage - Block Storagein the left menu of the console window.
2. On the Block Storage > Manage screen,check the availability zone of the block storage in the block storage list whose connection information is /dev/vda on linux-server-basic.
3. Click + Create block storage.
4. In the Create block storage window, set the information below and click OK.
   • Block storage name: MyBS
   • Block storage type: HDD
   • Block storage size (GB): 10 GB
   • Availability zone: The same availability zone as the block storage whose connection information is /dev/vda on linux-server-basicin the block storage list.
5. In the Success window, click OK.
6. Select MyBSand click Manage connectionsabove.
7. In the Manage Block Storage Connections window, set the information below and click Connect.
   • Connect to the instance: linux-server-basic
8. In the Success window, click OK.

Step 2. Set up, format, and mount additional block storage partitions

• While remotely connected to the Linux instance linux-server-basic, run the command below to create a partition on theblock storage MyBScreated in step 1, and then format and mount it.

#bash
echo -e "n\np\n1\n\n\nw" | sudo fdisk /dev/vdb

• Run the command below to format the partition.

sudo mkfs -t xfs /dev/vdb1

• Run the command below to create the /mnt/vdb directory so that you can mount the partition you added to the /mnt/vdb path.

sudo mkdir /mnt/vdb

• Add a setting to the /etc/fstab file by running the command below to auto-mount the partition you added at boot time.

sudo sh -c 'echo "UUID=$(sudo blkid -s UUID -o value /dev/vdb1) /mnt/vdb xfs defaults,nodev,noatime,nofail 1 2" >> /etc/fstab'

• Run the command below to mount all filesystems defined in the /etc/fstab file, and change permissions to allow all users to create, modify, and delete files in /mnt/vdb.

sudo mount -a
sudo chmod 777 /mnt/vdb

• Enter the command below to verify that the additional block storage is set up correctly.

df /dev/vdb1

Verify that the corresponding filesystem, capacity, and mount path are retrieved.

Output screen

Step 3. Create material in additional block storage

• While remotely connected to linux-server-basic, run the command below to create block storage.

export MYSQL_PWD=nhnpassword

• Create a mysql-db-basic data lookup in the block storage you created.

mysql --host=(virtual IP address of mysql-db-basic instance) --user=nhncloud -e "SELECT * FROM employees.employees LIMIT 30;" -B --batch > /mnt/vdb/employees.csv

• The data created by the command below (csv file)created with the command

cat /mnt/vdb/employees.csv

Output screen

Create object storage and retrieve data

Enable the Object Storage service to create a container and upload objects to it. Save the object to your Linux instance and then connect to it to see if the data is output.

Step 1. Enable the Object Storage service and create a container

1. Click the "Select Services" tab located to the right of your MyPRJ project.
2. On the screen that appears after you click Select Services, click All Services - Storage - Object Storage.
3. In the Activate service window, click OK.
4. If the service is activated correctly, you will be taken to the Object Storage screen. If you are not taken to the screen, click Storage - Object Storagein the left menu of the console pane.
5. + Create container.
6. In the Create Container window, enter the information below and click OK.
   • Name: myobs
   • Access policy: PUBLIC
   • Storage class: Standard
   • Set object locking: Disabled
   • Encryption settings: Disabled
7. In the Success window, click OK.

Step 2. Change the Linux instance web source using object storage

• Run a new terminal or PowerShellin your work environment.
• Use the command below to create the web-sample directory and save the index.html file.

#PowerShell
mkdir /web-sample

    echo '<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>::: Welcome to NHN Cloud :::</title>
        <script>
            let countdownTimer;

            function fetchServerIP() {
                fetch("/server-info")
                    .then(response => response.json())
                    .then(data => {
                        const serverIP = data.serverIP;
                        document.getElementById("server-ip").innerText = "Server IP Address: " + serverIP;
                    })
                    .catch(error => {
                        document.getElementById("server-ip").innerText = "Unable to fetch server IP address";
                    });
            }

            function startStressTest() {
                const button = document.getElementById("start-btn");
                button.innerText = "Starting...";
                let timeLeft = 120;
                const countdownDisplay = document.getElementById("countdown");
                countdownDisplay.innerText = "Time left: " + timeLeft + " seconds";

                countdownTimer = setInterval(() => {
                    timeLeft--;
                    countdownDisplay.innerText = "Time left: " + timeLeft + " seconds";

                    if (timeLeft <= 0) {
                        clearInterval(countdownTimer);
                        countdownDisplay.innerText = "Stress test complete!";
                    }
                }, 1000);

                fetch("/start-stress")
                    .then(response => response.text())
                    .then(data => {
                        console.log(data);
                    })
                    .catch(error => {
                        console.error("Error starting stress test:", error);
                    });
            }

            window.onload = fetchServerIP;
        </script>
    </head>
    <body>
        <h1>Welcome to NHN Cloud Web Server</h1>
        <p id="server-ip">Fetching server IP address...</p>
        <button id="start-btn" onclick="startStressTest()">Start Stress Test</button>
        <p id="countdown">Time left: 120 seconds</p>
    </body>
    </html>' > /web-sample/index.html

1. In the console pane, click Storage - Object Storagein the left menu.
2. On the Object Storage screen, click myobsto go to the container details page screen.
3. On the myobs screen, click Upload object.
4. In the Upload Object window, click Choose File, select the index.html file located in /web-sample, and then click OK.
5. In the Upload Status Information window, verify that the index.html file upload status is Success, and then click OK.
6. To the right of the uploaded index.html object, in the Public URL entry, click Copy URLto copy the public URL address of the index.html file.
7. Connect remotely to linux-server-basic.

   [Note] How to remotely connect to linux-server-basic

   • For how to connect remotely, see 4. Set up your network and create an instance - Step 1. SSH remote access.

8. After connecting to the linux-server-basic remote, run the command below to download and save index.html.

sudo curl -o /var/www/html/index.html (Public URL of the index.html file you uploaded to myobs)

• Run the commands below to set up additional service configurations.

curl -s https://kr2-api-object-storage.nhncloudservice.com/v1/AUTH_cd41d4b57c1346b99641cc4092f2842d/onboarding/service-setting.sh | sed 's/\r$//' > /home/ubuntu/service-setting.sh
chmod +x /home/ubuntu/service-setting.sh
/home/ubuntu/service-setting.sh

• Open a new window in your web browser and enter the http://복사한 linux-server-basic floating IP addressto see the changed web page.

References

• Storage
• Block Storage
• Object Storage
• HDD
• SSD
• Disk encryption
• fdisk
• DF
• Mount
• chmod

Previous step

• 6. Create and attach databases

Next steps

• 8. Configure monitoring