How-to guides

• 1: DB Service Manage
• 2: Backing up and restoring the database
• 3: Configure Read Replica
• 4: EPAS(DBaaS) Server Connection
• 5: Extension Usage

1 - DB Service Manage

Users can manage EPAS (DBaaS) through the Samsung Cloud Platform Console.

Managing Parameters

Provides a feature that enables easy viewing and modification of database configuration parameters.

Viewing Parameters

To view configuration parameters, follow these steps.

1. Click the All Services > Database > EPAS(DBaaS) menu. Navigate to the EPAS(DBaaS) Service Home page.
2. On the Service Home page, click the EPAS(DBaaS) menu. You will be taken to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource whose parameters you want to view or modify. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button and then click the Parameter Management button. The Parameter Management popup opens.
5. In the Parameter Management popup, click the Search button. The Search Notification popup opens.
6. Lookup Notification when the popup window opens, click the Confirm button. Retrieving may take a short amount of time.

Parameter Modify

To modify the configuration parameters, follow the steps below.

1. Click the All Services > Database > EPAS(DBaaS) menu. Navigate to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. You will be taken to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource whose parameters you want to view or modify. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button and then click the Parameter Management button. The Parameter Management popup opens.
5. In the Parameter Management popup, click the Search button. The Search Notification popup opens.
6. Lookup Notification When the popup window opens, click the Confirm button. Retrieving may take a short amount of time.
7. If editing is required, click the Edit button and enter the changes in the custom value area of the Parameter to be edited.
8. When the input is complete, click the Complete button.

DB User Management

Provides management features that allow viewing DB user information and changing status information.

Query DB users

To retrieve DB users, follow these steps.

1. Click the All Services > Database > EPAS(DBaaS) menu. Go to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. You will be taken to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource whose DB users you want to view. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button, then click the DB User Management button. You will be directed to the DB User Management page.
5. Click the Search button on the DB User Management page. Retrieving may take a short while.

Changing DB User Status

To change the status of the retrieved DB user, follow these steps.

1. Click the All Services > Database > EPAS(DBaaS) menu. Go to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. You will be taken to the EPAS(DBaaS) List page.
3. EPAS(DBaaS) List page, click the resource whose DB user you want to modify. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button, then click the DB User Management button. You will be directed to the DB User Management page.
5. On the DB User Management page, click the Search button. Retrieving may take a short time.
6. If modification is needed, click the Edit button, and change the status field value or enter remarks.
7. When the input is complete, click the Complete button.

Managing DB Access Control

Provides IP-based DB user access control management functionality. Users can directly specify the IPs that can access the database, configuring it so that only authorized IPs are allowed access.

View DB Access Control

Follow these steps to query DB users with IP access control enabled.

1. Click the All Services > Database > EPAS(DBaaS) menu. Proceed to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. You will be taken to the EPAS(DBaaS) List page.
3. Click the resource you want to manage access control for on the EPAS(DBaaS) List page. You will be taken to the EPAS(DBaaS) Detail page.
4. Click the More button, then click the DB Access Control Management button. You will be taken to the DB Access Control Management page.
5. On the DB Access Control Management page, click the Search button. Retrieving the data may take a moment.

Add DB access control

To add IP access control, follow these steps.

1. Click the All Services > Database > EPAS(DBaaS) menu. Navigate to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. You will be taken to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource for which you want to add IP access control. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button, then click the DB Access Control Management button. You will be taken to the DB Access Control Management page.
5. On the DB Access Control Management page, click the Search button. The query may take a moment.
6. After the query completes, click the Add button. The Add DB Access Control popup window opens.
7. Add DB Access Control In the popup window, select the DB username and enter the IP address.
8. When the input is complete, click the Save button.

Delete DB access control

To delete IP access control, follow these steps.

1. Click the All Services > Database > EPAS(DBaaS) menu. Go to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. Navigate to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource for which you want to delete IP access control. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button and then click the DB Access Control Management button. You will be taken to the DB Access Control Management page.
5. On the DB Access Control Management page, click the Search button. Retrieving the data may take a moment.
6. When the query is complete, click the Delete button. The Delete popup window opens.
7. In the Delete popup, click the Confirm button.

Managing Archive

Provides the ability to configure Archive mode and set the retention period for Archive logs, allowing users to flexibly configure Archive log management policies to suit their operational environment. Additionally, it provides a feature to manually delete archive logs, allowing you to clean up unnecessary log data and manage system resources effectively.

Configure Archive mode

To set the Archive mode, follow these steps.

1. Click the All Services > Database > EPAS(DBaaS) menu. Go to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. Navigate to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource for which you want to set Archive mode. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button and then click the Archive Settings Management button. You will be taken to the Archive Settings Management page.
5. On the Archive Settings Management page, click the Search button. The query may take a short time.
6. Click the Edit button and select the usage status and retention period.
7. When the edit is complete, click the Complete button.

Delete Archive file

To delete the Archive file, follow these steps.

1. Click the All Services > Database > EPAS(DBaaS) menu. Navigate to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. You will be taken to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource you want to set to Archive mode. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button, then click the Archive Settings Management button. You will be taken to the Archive Settings Management page.
5. Archive Settings Management page, if you want to delete all Archive files, click the Delete All Archives button; if you only want to delete the backed‑up Archive files, click the Delete Backed‑up Archives button.

Modify Audit Settings

You can modify the Audit log storage settings for EPAS (DBaaS).

To change the Audit log storage settings of EPAS (DBaaS), follow the steps below.

1. Click the All Services > Database > EPAS(DBaaS) menu. Navigate to the EPAS(DBaaS) Service Home page.
2. Click the EPAS(DBaaS) menu on the Service Home page. You will be taken to the EPAS(DBaaS) List page.
3. EPAS(DBaaS) List page, click the resource whose service status you want to view. You will be taken to the EPAS(DBaaS) Details page.
4. Click the Edit icon of Audit Settings at the bottom of the detailed information. The Edit Audit Settings popup window opens.
5. Modify Audit Settings After changing the usage in the popup window, click the Confirm button.
   • When Enable is selected, the Audit log feature is configured. Enabling the Audit log may degrade DB performance.
   • If you disable use, the Audit log storage file will be deleted. Before disabling use, back up the Audit log file separately.

DB Log Export

Supports exporting log data that requires long-term retention among audit logs to Object Storage. Users can directly configure the log types to be stored, the target bucket for export, and the export interval. Based on the configured criteria, logs are copied to the specified Object Storage for retention. Additionally, to efficiently manage disk space, we also provide an option that exports logs to Object Storage while automatically deleting the original log files. By using this option, you can effectively free up storage capacity while safely retaining the necessary log data for long-term storage.

Setting DB Log Export Mode

To set the DB Log export mode, follow these steps.

1. Click the All Services > Database > EPAS(DBaaS) menu. Navigate to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. You will be taken to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource for which you want to export the DB Log. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button, then click the DB Log Export button. You will be taken to the DB Log Export page.
5. On the DB Log Export page, click the Register button. You will be taken to the DB Log Export Register page.
6. After entering the required information on the DB Log Export Registration page, click the Complete button.

   Category	Required	Detailed description
   Log type	Required	Log type to be saved
   Save bucket name	Required	Object Storage bucket name to be saved
   Authentication key > Access key	Required	Access key for accessing the Object Storage you want to store
   Authentication key > Secret key	Required	Secret key for accessing the Object Storage you want to store
   File creation cycle	Required	File creation frequency in Object Storage
   Whether to delete the original log	Selection	Whether to delete the original logs when exporting to Object Storage

   Table. EPAS (DBaaS) DB Log Export Configuration Items

Managing DB Log Export

To modify, cancel, or immediately export the DB Log export settings, follow these steps.

1. All Services > Database > EPAS(DBaaS) Click the menu. Navigate to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. Navigate to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource you want to manage DB Log export for. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button and then click the DB Log Export button. You will be taken to the DB Log Export page.
5. DB Log Export On the page, depending on the log type you want to manage, click the More button and then click the Export Now, Edit, Terminate buttons.
   • Export Immediately: The selected logs are exported to the bucket of the previously configured Object Storage.
   • Edit: Modify the DB Log export mode setting.
   • Cancel: Cancel the DB Log export mode setting.

Minor Version Upgrade

We provide version upgrade functionality for some feature improvements and security patches. Only Minor version upgrades within the same Major version are supported.

To upgrade the Minor Version, follow the steps below.

1. Click the All Services > Database > EPAS(DBaaS) menu. Go to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. You will be taken to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource you want to upgrade the version for. You will be taken to the EPAS(DBaaS) Detail page.
4. Click the Edit button in the Image version item. The Version Upgrade popup window opens.
5. Version Upgrade In the popup window, select the updated version and backup setting, then click the Confirm button.
6. Version Upgrade Notification Click the Confirm button in the popup window.

Configuring Migration

Provides a Migration feature that synchronizes in real time with the live database and replicates using a Replication method without service interruption.

To configure Migration, follow these steps.

1. All Services > Database > EPAS(DBaaS) Click the menu. Navigate to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. You will be taken to the EPAS(DBaaS) List page.
3. EPAS(DBaaS) List page: click the resource you want to migrate. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button, then click the Migration configuration button. Migration configuration popup window opens.
5. Migration configuration In the popup window, review the instructions and click the Confirm button. You will be taken to the Migration configuration page.
6. On the Migration configuration page, enter the required information, then click the Check connection button.
7. When the connection is complete, click the Complete button.

   Category	Required	Detailed description
   Source DB Database name	Required	Database name of the source DB to be migrated
   Source DB IP	Required	IP of the Source DB that is the migration target
   Source DB Port	Required	Port of the Source DB to be migrated
   Source DB username	Required	Username of the source DB that is the migration target
   Source DB password	Required	Password of the source DB for migration

   Table. EPAS(DBaaS) migration configuration items

Promote Migration Cluster to Master Cluster

You can promote a configured Migration Cluster to a Master Cluster.

To promote the Migration Cluster to Master, follow these steps.

1. Click the All Services > Database > EPAS(DBaaS) menu. Navigate to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) menu on the Service Home page. Navigate to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource to promote to Master. You will be taken to the EPAS(DBaaS) Details page.
4. Click the More button, then click the Master Promotion button. The Master Promotion Notification popup window opens.
5. Master Promotion Notification in the popup window, click the Confirm button.

Upgrade OS Kernel

The OS Kernel can be upgraded to improve the functionality of the running database and apply security patches.

To upgrade the OS Kernel, follow the steps below.

1. Click the All Services > Database > EPAS(DBaaS) menu. Navigate to the EPAS(DBaaS) Service Home page.
2. Click the EPAS(DBaaS) menu on the Service Home page. You will be taken to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource to upgrade the OS Kernel. You will be taken to the EPAS(DBaaS) Detail page.
4. Click the More button, then click the OS(Kernel) Upgrade button. The OS(Kernel) Upgrade Notification popup opens.
5. OS(Kernel) Upgrade Notification In the popup window, review the instructions and click the Confirm button.

2 - Backing up and restoring the database

Users can configure backups of EPAS (DBaaS) through the Samsung Cloud Platform Console and restore from the backed‑up files.

EPAS(DBaaS) Backup

To ensure that users’ data can be stored safely, EPAS (DBaaS) provides a data backup feature based on its own backup commands. Additionally, you can verify whether the backup was successful using the backup history feature, and you can also delete backed‑up files.

Configure Backup

For instructions on configuring backups for EPAS (DBaaS), see Create EPAS (DBaaS).

To modify the backup settings of the created resource, follow the steps below.

To set up a backup, follow these steps.

1. All Services > Database > EPAS(DBaaS) Click the menu. 1. Go to the Service Home page of EPAS (DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. 2. Go to the EPAS(DBaaS) List page.
3. EPAS(DBaaS) List page: click the resource for which you want to configure a backup. 3. EPAS(DBaaS) Details page is accessed.
4. Click the Edit button of the backup item. 4. Backup Settings popup window opens.
5. When configuring a backup, click Enable in the Backup Settings popup, select the retention period, backup start time, and Archive backup interval, then click the Confirm button.
   • If you stop the backup configuration, deselect Use in the Backup Settings popup and authenticate using the logged-in user’s mobile phone.
     Once user authentication is completed, the backup configuration is disabled and backup execution stops.

Check backup history

To view the backup history, follow these steps.

1. All Services > Database > EPAS(DBaaS) Click the menu. 1. Go to the Service Home page of EPAS (DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. 2. Go to the EPAS(DBaaS) List page.
3. EPAS(DBaaS) List page, click the resource to view the backup history. 3. Go to the EPAS(DBaaS) Details page.
4. Click the Backup History button. 4. The Backup History popup opens.
5. Backup History In the popup window, you can view the backup status, version, backup start time, backup completion time, and size.

Delete backup file

To delete the backup history, follow these steps.

1. All Services > Database > EPAS(DBaaS) menu, click it. 1. Go to the Service Home page of EPAS (DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. 2. Go to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource to view its backup history. 3. Go to the EPAS(DBaaS) Details page.
4. Click the Backup History button. 4. Backup History The popup window opens.
5. Backup History In the popup window, check the files you want to delete, then authenticate using the logged-in user’s mobile phone.
   • When user authentication is completed, the backup file is deleted.

EPAS(DBaaS) Recover

If recovery is needed from a backup file due to a failure or data loss, the restore function can recover based on a specific point in time. When you perform an EPAS (DBaaS) recovery, a new server is created with the OS image from the initial provisioning point, the database is installed with the version from the backup point, and the recovery proceeds with the database’s configuration information and data.

To restore EPAS (DBaaS), follow the steps below.

1. All Services > Database > EPAS(DBaaS) Click the menu. 1. Go to the Service Home page of EPAS (DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. 2. Go to the EPAS(DBaaS) List page.
3. EPAS(DBaaS) resources On the list page, click the resource you want to restore. 3. Navigate to the EPAS(DBaaS) Details page.
4. Click the Database Recovery button. 4. Database Recovery Navigate to the page.
5. After entering the relevant information in the Database Recovery Configuration area, click the Complete button.

   Category	required status	Detailed description
   Recovery Type	Required	Set the point in time the user wants to recover Backup point (recommended): Recover based on the backup file. Select from the list of backup points displayed in the list Custom point: Recover to a user‑desired point within the range of recoverable backup points. The recoverable period depends on the Archive backup interval setting, allowing recovery to any point from the start of the first backup up to 1 hour/30 minutes/10 minutes/5 minutes before the current time. Select the date and time to recover
   Server name prefix	Required	Recovery DB server name Start with a lowercase English letter and use lowercase letters, numbers, and special characters (-) to enter 3 to 16 characters Based on the server name, a postfix such as 001, 002 is appended to generate the actual server name
   Cluster name	Required	Recovery DB cluster name Enter using English letters, 3 to 20 characters A cluster is a unit that groups multiple servers
   Service Type > Server Type	Essential	Recovery DB server type Standard: Standard specification commonly used High Capacity: Large-capacity server with 24 vCores or more
   Service Type > Planned Compute	Selection	Status of resources with Planned Compute configured In Use: Number of resources with Planned Compute configured that are currently in use Configured: Number of resources with Planned Compute configured Coverage Preview: Amount applied per resource by Planned Compute Create Planned Compute Service: Navigate to the Planned Compute service application page For more details, refer to Planned Compute 신청하기
   Service Type > Block Storage	Required	Block Storage settings used by the recovery DB Basic OS: Area where the DB engine is installed DATA: Storage area for table data, archive files, etc. Applied identically with the storage type set in the original cluster Enter capacity as a multiple of 8 within the range 16 to 5,120 Additional: Storage area for DATA, Archive, TEMP, Backup data Applied identically with the storage type set in the original cluster In the recovery DB, only DATA, TEMP, and Archive purposes can be added After selecting Use, enter the storage purpose and capacity To add storage, click the Add button, and to delete, click the x button Capacity can be entered as a multiple of 8 within the range 16 to 5,120, and up to 9 can be created
   Database username	Required	Database username Apply the same username set in the original cluster
   Database Port number	Required	Database Port number Apply the same Port number configured in the original cluster
   IP access control	Select	Service Access Policy Configuration Since the access policy is set for the IP entered on the page, you do not need to configure a separate Security Group policy Enter in IP format (example: 192.168.10.1) or CIDR format (example: 192.168.10.0/24, 192.168.10.1/32) and click the Add button To delete an entered IP, click the x button next to the entered IP
   maintenance period	Select	Database maintenance window If you select Use, set the day of week, start time, and duration It is recommended to set a maintenance window for stable management of the DB. Patch operations will be performed at the scheduled time, causing service interruptions If set to not use, Samsung SDS is not responsible for issues arising from unapplied patches.
   tag	Select	Add Tag Add Tag after clicking the Add Tag button Enter or select Key, Value values

   Table. EPAS (DBaaS) recovery configuration items

3 - Configure Read Replica

Users can enter the required information for a Read Replica through the Samsung Cloud Platform Console and create the service using the detailed options.

Configure Replica

You can create replica servers for read‑only or disaster‑recovery purposes through replica configuration. You can create up to 5 replicas per database.

To configure a Replica, follow these steps.

1. All Services > Database > EPAS(DBaaS) Click the menu. 1. Go to the Service Home page of EPAS (DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. 2. Go to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource to configure the Replica. 3. Navigate to the EPAS(DBaaS) Details page.
4. Click the Replica configuration button. 4. Go to the Replica configuration page.
5. After entering information in the Replica configuration area, click the Complete button.

   Category	required status	Detailed description
   Region	Required	Region to configure the Replica Replica configuration (Other Region)exposed only when selected
   Replica count	Required	Number of Replicas to configure Up to 5 can be configured per cluster If you select more than one value, additionally enter the Replica name and service type information
   Replica name	Required	Replica server name Start with a lowercase English letter, and use lowercase letters, numbers, and special characters (-) to enter 3 to 19 characters The entered Replica name is displayed as the cluster name in the list
   Service Type > Server Type	Required	Replica server type Standard: standard specification commonly used High Capacity: large-capacity server with 24 vCore or more
   Service Type > Planned Compute	Selection	Status of resources with Planned Compute configured In Use: Number of resources with Planned Compute that are currently in use Configured: Number of resources with Planned Compute configured Coverage Preview: Amount applied per resource by Planned Compute Create Planned Compute Service: Navigate to the Planned Compute service application page For more details, see Planned Compute Apply
   IP access control	Selection	Service Access Policy Configuration Since the access policy is set for the IP entered on the page, you do not need to configure a separate Security Group policy Enter in IP format (example: 192.168.10.1) or CIDR format (example: 192.168.10.0/24, 192.168.10.1/32) and click the Add button To delete an entered IP, click the x button next to the entered IP
   maintenance period	Selection	Database maintenance window If you select Use, set the day, start time, and duration It is recommended to set a maintenance window for stable management of the DB. Patch operations will be performed at the scheduled time, causing service interruption If set to unused, we are not responsible for any issues arising from patches not being applied.
   Tag	Select	Add Tag Add Tag after clicking the button Enter or select Key, Value values

   Table. EPAS (DBaaS) Replica configuration items

Reconfigure Replica

If a network outage or replication delay with the Master Cluster occurs, you can use the Replica reconstruction function to replicate the Master Cluster’s data again.

To reconfigure the Replica, follow these steps.

1. All Services > Database > EPAS(DBaaS) Click the menu. 1. Go to the Service Home page of EPAS (DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. 2. Go to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource to reconfigure the Replica. 3. EPAS(DBaaS) Details Navigate to the page.
4. Click the Reconstruct Replica button. 4. Replica Reconfiguration Notification A popup window opens.
5. Replica Reconfiguration Notification popup window, click the Confirm button.

Promoting a Replica Cluster to a Master Cluster

You can promote a configured Replica Cluster to a Master Cluster.

To promote a Replica Cluster to Master, follow these steps.

1. All Services > Database > EPAS(DBaaS) Click the menu. 1. Go to the Service Home page of EPAS (DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. 2. EPAS(DBaaS) List go to the page.
3. On the EPAS(DBaaS) List page, click the resource to promote to Master. 3. Go to the EPAS(DBaaS) Details page.
4. Click the More button, then click the Promote to Master button. 4. Master Promotion Notification The popup window opens.
5. In the Master Promotion Notification popup, click the Confirm button.

4 - EPAS(DBaaS) Server Connection

Scenario Overview

EPAS(DBaaS) Server Connection scenario involves creating a Bastion host (Virtual Server) and a Database service, and accessing the DB service through the Bastion host. To reliably connect to EPAS (DBaaS) in the Samsung Cloud Platform environment, you need to create a Bastion host and establish a network connection using it. To maintain stability and a high level of security, it is recommended to configure the Database service in a Private Subnet environment and set up the Bastion host in a restricted Public Subnet environment.

This scenario primarily describes creating a Bastion host and a Database service, configuring the network environment for Bastion host and Database access, and connecting through a DB client.

Scenario components

You can build the scenario using the following services.

Scenario setup method

Create the services needed to build the scenario by following the steps below.

Configure the network

Describes the process of configuring the network environment for accessing the Bastion Host and Database services.

1-1. Create VPC

1. Click the All Services > Networking > VPC menu. You will be taken to the VPC’s Service Home page.
2. Click the Create VPC button on the Service Home page. You will be taken to the Create VPC page.
3. On the VPC Creation page, enter the information required to create the service.
   • Enter the IP range as 192.168.x.0/16
4. Summary Check the detailed information and estimated billing amount generated in the panel, and click the Complete button.
   • Once creation is complete, check the created resources on the VPC List page.

1-2. Create Subnet

1. Click the All Services > Networking > VPC menu. Navigate to the VPC Service Home page.
2. On the Service Home page, click the Subnet menu. You will be taken to the Subnet List page.
3. Click the Subnet Create button. You will be taken to the Subnet Create page.
4. On the Subnet Creation page, enter the information required to create the service.
   • Select the Subnet type as General.
   • Select a pre‑created VPC.
   • Enter the IP range as 192.168.x.0/24.
5. In the Summary panel, verify the detailed information and estimated billing amount, then click the Complete button.
   • When creation is complete, check the created resources on the Subnet list page.

1-3. Create Internet Gateway

1. Click the All Services > Networking > VPC menu. You will be taken to the VPC’s Service Home page.
2. On the Service Home page, click the Internet Gateway menu. You will be taken to the Internet Gateway List page.
3. Click the Create Internet Gateway button. You will be taken to the Create Internet Gateway page.
4. On the Internet Gateway Creation page, enter the required information needed to create the service.
   • Select a pre‑created VPC.
   • In the Firewall usage item, select Use.
5. Summary Check the detailed information and estimated billing amount generated in the panel, and click the Complete button.
   • Once creation is complete, verify the created resource on the Internet Gateway list page.

1-4. Create Public IP

1. Click the All Services > Networking > VPC menu. Navigate to the VPC Service Home page.
2. On the Service Home page, click the Public IP menu. You will be taken to the Public IP List page.
3. Click the Public IP Reservation button. You will be taken to the Public IP Reservation page.
4. On the Public IP reservation page, enter the required information needed to reserve the service.
5. In the Summary panel, verify the detailed information and estimated billing amount, then click the Complete button.
   • Once creation is complete, check the created resources on the Public IP List page.

1-5. Create Security Group

1. Click the All Services > Networking > Security Group menu. Go to the Service Home page of Security Group.
2. Click the Create Security Group button on the Service Home page. Navigate to the Create Security Group page.
3. On the Security Group creation page, enter the required information needed to create the service.
4. Check the input information and click the Complete button.
   • Once creation is complete, check the created resources on the Security Group List page.

Create bastion host

Describes the process of configuring a Bastion Host that requires the Database access client to be installed.

2-1. Create Server Keypair

1. Click the All Services > Compute > Virtual Server menu. Navigate to the Service Home page of Virtual Server.
2. On the Service Home page, click the Keypair menu. You will be taken to the Keypair List page.
3. Click the Keypair creation button. You will be taken to the Keypair creation page.
4. Enter the required information needed to create a service on the Keypair creation page.
5. Check the creation information and click the Complete button.
   • The key can be downloaded only once, and reissuance is not available.
   • Please store the downloaded key in a secure location.

2-2. Create Bastion host

1. Click the All Services > Compute > Virtual Server menu. Navigate to the Service Home page of Virtual Server.
2. On the Service Home page, click the Virtual Server Create button. It navigates to the Virtual Server Create page.
3. Virtual Server Creation page, enter the required information to create the service.
   • Select Windows for the image.
   • Select the pre-created VPC and Subnet.
   • Click Use NAT, then in 1-4. Create Public IP select the reserved Public IP.
   • Connect the Keypair you created in 2-1. Create Server Keypair.
4. Summary Check the detailed information and estimated billing amount generated in the panel, and click the Complete button.
   • After creation is complete, verify the created resources on the Virtual Server list page.

2-3. Bastion host Check login ID and PW

1. Click the All Services > Compute > Virtual Server menu. Navigate to the Service Home page of Virtual Server.
2. Click the Virtual Server menu on the Service Home page. You will be taken to the Virtual Server List page.
3. On the Virtual Serve List page, click the resource you created in 2-2. Create Bastion host. You will be taken to the detailed information page of that resource.
4. On the detail information page, click the RDP password View button in the Keypair name field. The RDP password View popup window will open.
5. In the RDP password lookup popup window, attach the keypair file downloaded from 2-1. 서버 Keypair 생성하기.
6. After attaching, click the Password Check button. The ID and Password for accessing the resource are displayed.
   • The ID and Password are used later as credentials to access the Bastion host in 5-1. Bastion host 접속하기.

Create Database

Describes the process of creating a Database service.

3-1. EPAS(DBaaS) Service Creation

1. Click the All Services > Database > EPAS(DBaaS) menu. Go to the Service Home page of EPAS(DBaaS).
2. Click the EPAS(DBaaS) Create button on the Service Home page. You will be taken to the EPAS(DBaaS) Create page.
3. Create EPAS (DBaaS) Enter the required information needed to create the service on this page.
   • Select the pre‑created VPC and Subnet and connect them.
   • Enter the database-related creation details on the required information input screen.
   • Add the Bastion host IP in the IP access control settings.
   • The Database Port defaults to 2866, but the user can also specify it.
4. Summary Check the detailed information and estimated billing amount generated in the panel, and click the Complete button.
   • When creation is complete, verify the created resource on the EPAS(DBaaS) list page.

Configuring Rules

It explains the process of configuring rules for a user to connect to the Bastion host and rules for connecting to the Database from the Bastion host.

4-1. Add Security Group Rules

1. Click the All Services > Networking > Security Group menu. Navigate to the Service Home page of the Security Group.
2. From the Service Home page, click the Security Group menu. You will be taken to the Security Group List page.
3. Select the Security Group resource created in 1-5. Create Security Group. Navigate to the detailed information page of that resource.
4. On the detail information page, click the Rules tab. You will be taken to the Rules tab.
5. On the Rules tab, click the Add Rule button. You will be taken to the Add Rule popup.
6. Add Rule In the popup window, enter the rule below, and click the Confirm button.

   direction	Remote	target address	Protocol	port	Explanation
   Inbound	CIDR	User PC IP	TCP	3389 (RDP)	Bastion client PC → Bastion host
   Outbound	CIDR	DB IP	TCP	Database Port (manual entry)	Bastion host → Database

   Table. Security Group rules that need to be added

4-2. Add IGW Firewall Rule

1. All Services > Networking > Firewall Click the menu. Go to the Service Home page of the Firewall.
2. On the Service Home page, click the Firewall menu. You will be taken to the Firewall List page.
3. On the Firewall List page, select the Internet Gateway Resource Name created in 1-3. Internet Gateway 생성하기. You will be taken to the detailed information page for that resource.
4. Click the Rules tab on the detail information page. You will be taken to the Rules tab.
5. On the Rules tab, click the Add Rule button. You will be taken to the Add Rule popup.
6. Add Rule In the popup window, enter the rule below, and click the Confirm button.

   origin address	Destination address	Protocol	Port	Operation	direction	Explanation
   Bastion connection PC IP	Bastion host IP	TCP	3389(RDP)	Allow	Inbound	User PC → Bastion host

   Table. Internet Gateway Firewall rules that need to be added

Connect to Database

Describes the process of a user accessing the database via a DB client program.

This guide explains how to connect using pgAdmin. Since there are various database client programs and CLI utilities, you may install and use the tool that best fits your needs.

5-1. Connecting to Bastion host

1. In the Windows environment of the PC that will connect to the Bastion host, run Remote Desktop Connection, then enter the NAT IP of the Bastion Host and click the Connect button.
2. When the remote desktop connection succeeds, the user credential input window opens. Enter the ID and Password verified in 2-3. Bastion host Access ID and PW Check and click the Confirm button.

5-2. Install DB client program (pgAdmin) on the Bastion host

1. Go to the official pgAdmin page and download the pgAdmin program.
   • pgAdmin program download URL: https://www.pgadmin.org/download/
2. Connect the user’s PC hard drive to upload the file to the Bastion host.
3. In the Remote Desktop Connection Local Resources tab, click the Details button for the Local Devices and Resources entry.
4. Select the local disk of the location where the file was downloaded on the drive, and click the OK button.
5. Copy the downloaded file, upload it to the Bastion Host, and click the pgAdmin installer to install.

5-3. Connect to the database using the DB client program (pgAdmin)

1. Run pgAdmin and click the Add New Server button.
2. Register - Server popup window, enter the Database server information created in 3-1. EPAS(DBaaS) Create Service into the General and Connection tabs, and click the Save button.

   Screen (tab)	Required input field	input value
   General	Name	Custom (ex. service name)
   Connection	Host name/address	Database server IP
   Connection	Port	Database Port
   Connection	Maintenance database	Database name
   Connection	Password	Database password

   Table: DB connection client program input fields
3. Click the name of the database created in pgAdmin to connect.
   • After connecting, you can perform simple queries, among other tasks.

5 - Extension Usage

Using EPAS(DBaaS) Extension

You can view the list of extensions that can be installed in the current database with the SQL statement below.

SQL> select * from pg_available_extensions;

In EPAS(DBaaS), the items installed in addition to the default extensions included per version are as follows.

If you need to install additional extensions beyond the items above, refer to Support Center > Inquiry and contact us.

• After a request is received, we will review it and proceed with installation. Please note that some extensions may not function properly during replica configuration and recovery.