How-to guides

• 1: EPAS(DBaaS) server connection
• 2: Managing DB Service
• 3: DB Backup and Recovery
• 4: Configuring Read Replica
• 5: Extension use

1 - EPAS(DBaaS) server connection

Scenario Overview

The EPAS(DBaaS) server connection scenario is a scenario where a Bastion host (Virtual Server) and Database service are created to access the DB service through the Bastion host. To securely access EPAS(DBaaS) in the Samsung Cloud Platform environment, it is necessary to create a Bastion host and use it for network connection. To maintain a stable and high level of security, it is recommended to configure the Database service in a Private Subnet environment and configure the Bastion host in a limited Public Subnet environment.

This scenario largely describes the process of creating a Bastion host and Database service, configuring the network environment for Bastion host and Database connection, and accessing it through a DB connection client.

Scenario Components

You can configure the scenario using the following services.

Scenario composition method

To configure the scenario, create the necessary services through the following procedure.

1. Configuring the Network

This describes the process of configuring the network environment for Bastion Host and Database service connection.

1-1. Creating a VPC

1. Click All services > Networking > VPC menu. It moves to the Service Home page of VPC.
2. On the Service Home page, click the Create VPC button. It moves to the Create VPC page.
3. VPC Creation page, please enter the information required for service creation.
   • IP range should be entered as 192.168.x.0/16.
4. In the Summary panel, review the detailed information and estimated charges, then click the Complete button.
   • After creation is complete, check the created resource on the VPC list page.

1-2. Creating a Subnet

1. Click All services > Networking > VPC menu. It moves to the Service Home page of VPC.
2. Service Home page, click the Subnet menu. It moves to the Subnet list page.
3. Click the Subnet Creation button. It moves to the Subnet Creation page.
4. Subnet creation page where you enter the information needed to create a service.
   • Subnet type should be selected as General.
   • Please select a pre-created VPC.
   • IP range should be entered as 192.168.x.0/24.
5. In the Summary panel, review the detailed information and estimated charge, then click the Complete button.
   • After creation is complete, check the created resource in the Subnet list page.

1-3. Creating an Internet Gateway

1. Click All services > Networking > VPC menu. It moves to the Service Home page of VPC.
2. Service Home page, click the Internet Gateway menu. Move to the Internet Gateway list page.
3. Click the Create Internet Gateway button. It moves to the Create Internet Gateway page.
4. Internet Gateway creation page, please enter the required information necessary for service creation.
   • Please select a pre-created VPC.
   • Select use in the Firewall usage item.
5. In the Summary panel, review the detailed information and estimated charges, then click the Complete button.
   • After creation is complete, check the created resource on the Internet Gateway list page.

1-4. Creating a Public IP

1. Click All services > Networking > VPC menu. It moves to the Service Home page of VPC.
2. Service Home page, click the Public IP menu. It moves to the Public IP list page.
3. Public IP Reservation button, click. Move to the Public IP Reservation page.
4. Public IP Reservation page, enter the required information necessary for service reservation.
5. Summary panel, check the detailed information generated and the expected billing amount, and click the Complete button.
   • Once creation is complete, check the created resource on the Public IP List page.

1-5. Creating a Security Group

1. Click on the menu for all services > Networking > Security Group. It moves to the Service Home page of Security Group.
2. Click the Security Group Creation button on the Service Home page. It moves to the Security Group Creation page.
3. Security Group creation page where you enter the required information necessary for service creation.
4. Check the input information and click the Complete button.
   • Once creation is complete, check the created resource on the Security Group list page

2. Creating a Bastion Host

This explains the process of configuring the Bastion Host where the database connection client should be installed.

2-1. Creating a Server Keypair

1. Click All Services > Compute > Virtual Server menu. It moves to the Service Home page of Virtual Server.
2. Click the Keypair menu on the Service Home page. It moves to the Keypair list page.
3. Create Keypair button should be clicked. It moves to the Create Keypair page.
4. Keypair creation page, please enter the required information necessary for service creation.
5. Check the creation information and click the Complete button.
   • The key can only be downloaded for the first time, and re-issuance is not provided.
   • Please keep the downloaded key in a safe place.

2-2. Creating a Bastion Host

1. Click All Services > Compute > Virtual Server menu. It moves to the Service Home page of Virtual Server.
2. Click the Virtual Server Creation button on the Service Home page. It moves to the Virtual Server Creation page.
3. Virtual Server Creation page, please enter the required information necessary for service creation.
   • The image is Windows, please select.
   • Please select the pre-created VPC and Subnet.
   • Click NAT Use and select the Public IP reserved in 1-4. Creating Public IP.
   • 2-1. Creating a server Keypair Connect the Keypair created from
4. Summary panel, check the detailed information generated and the expected billing amount, and click the Complete button.
   • After creation is complete, check the created resource on the Virtual Server list page.

2-3. Check Bastion host connection ID and PW

1. Click All Services > Compute > Virtual Server menu. It moves to the Service Home page of Virtual Server.
2. Service Home page, click the Virtual Server menu. Move to the Virtual Server list page.
3. Virtual Serve list page, click on the resource created in 2-2. Bastion host creation. It moves to the detailed information page of the corresponding resource.
4. Click the RDP password inquiry button in the Keypair item on the detailed information page. The RDP password inquiry popup window will open.
5. RDP password inquiry popup window, attach the keypair file downloaded from 2-1. Creating a server keypair.
6. After attaching, click the Password Check button. The ID and password required to access the resource will be displayed.
   • The ID and Password will be used as information to connect to the Bastion host later, as described in 5-1. Connect to Bastion host.

3. Creating a Database

Describes the process of creating a Database service.

3-1. Creating EPAS(DBaaS) Service

1. Click on the menu for all services > Database > EPAS(DBaaS). It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) creation button. It moves to the EPAS(DBaaS) creation page.
3. EPAS(DBaaS) creation page, please enter the required information necessary for service creation.
   • Select and connect the pre-created VPC and Subnet.
   • Enter Database related creation information on the required information input screen.
   • Add the Bastion host IP to the IP access control items.
   • Database Port is 2866 by default, but you can specify it as you want.
4. In the Summary panel, review the detailed information and estimated charges, then click the Complete button.
   • Once the creation is complete, check the created resource on the EPAS(DBaaS) list page.

4. Setting Rules

This describes the process of setting rules for users to access the Bastion host and rules for the Bastion host to access the Database.

4-1. Adding Security Group Security Rules

1. Click All services > Networking > Security Group menu. It moves to the Service Home page of Security Group.
2. Service Home page, click the Security Group menu. It moves to the Security Group list page.
3. 1-5. Creating a Security Group Select the Security Group resource created from. It will move to the detailed information page of the corresponding resource.
4. Click the Rules tab on the detailed information page. It moves to the Rules tab.
5. Click the Rule tab and click the Add Rule button. It moves to the Add Rule popup window.
6. Add Rule popup window, enter the rules below, and click the OK button

4-2. Adding IGW Firewall Rules

1. Click All services > Networking > Firewall menu. It moves to the Service Home page of Firewall.
2. Service Home page, click the Firewall menu. It moves to the Firewall list page.
3. Firewall list page, select the Internet Gateway resource name created in 1-3. Creating Internet Gateway, and move to the detailed information page of the corresponding resource.
4. Click the Rules tab on the detailed information page. It moves to the Rules tab.
5. Click the Rule tab and click the Add Rule button. It moves to the Add Rule popup window.
6. Add Rule popup window, enter the rules below, and click the OK button.

5. Connect to Database

This explains the process of a user accessing the Database through a DB connection client program.

This guide provides instructions on how to connect using pgAdmin. There are various database client programs and CLI utilities, so you can install and use the tools that suit you.

5-1. Connecting to the Bastion host

1. Run Remote Desktop Connection in the Windows environment of the PC you want to connect to the Bastion host, enter the NAT IP of the Bastion Host, and click the Connect button.
2. After a successful remote desktop connection, the user credential input window opens. Enter the ID and Password confirmed in 2-3. Checking Bastion host access ID and PW and click the Confirm button.

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

1. Go to the official pgAdmin page and download the pgAdmin program.
   • pgAdmin program download path: https://www.pgadmin.org/download/
2. Connect the hard drive of the user PC to upload the file to the Bastion host.
3. Click the Details button for local devices and resources entries in the Local Resources tab of Remote Desktop Connection.
4. Select the local disk where the file was downloaded to the drive and click the Confirm button.
5. Copy the downloaded file and upload it to the Bastion Host, then click the pgAdmin installation file to install it.

5-3. Using DB connection client program (pgAdmin) to connect to the database

1. Run pgAdmin and click the Add New Server button.
2. In the Register - Server popup window, enter the Database server information created in 3-1. Creating EPAS(DBaaS) service in the General tab and Connection tab, and click the Save button.

   Screen (Tab)	Required Input Element Items	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

   DB Connection Client Program Input Items
3. Click the database name created on pgAdmin to connect.
   • You can try simple queries after connecting.

2 - Managing DB Service

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

Managing Parameters

It provides a function to easily query and modify database configuration parameters.

Parameter Inquiry

To view the configuration parameters, follow these steps.

1. Click All Services > Database > EPAS(DBaaS) menu. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. EPAS(DBaaS) List page, click the resource you want to query and modify parameters. It moves to the EPAS(DBaaS) Details page.
4. Click the More button and click the Parameter Management button. The Parameter Management popup window opens.
5. In the Parameter Management popup window, click the Inquiry button. The Inquiry Notification popup window opens.
6. When the query notification pop-up window opens, click the OK button. It may take a little time to query.

Modifying Parameters

To modify the configuration parameters, follow these steps.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. On the EPAS(DBaaS) list page, click the resource you want to query and modify parameters. It moves to the EPAS(DBaaS) detail page.
4. Click the More button and click the Parameter Management button. The Parameter Management popup window opens.
5. In the Parameter Management popup window, click the Search button. The Search Notification popup window opens.
6. When the query notification popup window opens, click the OK button. It may take some time to query.
7. If modification is needed, click the Modify button and enter the modification details in the customized value area of the parameter to be modified.
8. When the input is complete, click the Save button.

Manage DB users

It provides management functions that can query DB user information and change status information.

Querying DB Users

To query DB users, follow the following procedure.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. Click on the resource you want to query the DB user on the EPAS(DBaaS) list page. It moves to the EPAS(DBaaS) details page.
4. Click the More button and click the DB User Management button. It moves to the DB User Management page.
5. On the DB User Management page, click the Search button. It may take some time to retrieve the results.

Change DB User Status

To change the status of the retrieved DB user, follow the next procedure.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. On the EPAS(DBaaS) list page, click the resource you want to modify the DB user. It moves to the EPAS(DBaaS) detail page.
4. Click the More button and click the DB User Management button. It moves to the DB User Management page.
5. On the DB User Management page, click the Search button. It may take some time to retrieve the results.
6. If modification is needed, click the Modify button and enter the status area value change or note contents.
7. When the input is complete, click the Save button.

DB Access Control Management

It provides IP-based DB user access control management function. Users can directly specify the IP that can access the database, so that only allowed IPs can access.

Checking DB Access Control

To view DB users with IP access control set, follow the next procedure.

1. All services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. On the EPAS(DBaaS) list page, click the resource for which you want to manage access control. It moves to the EPAS(DBaaS) details page.
4. Click the More button and click the DB Access Control Management button. It moves to the DB Access Control Management page.
5. DB Access Control Management page, click the Search button. It takes a little time to search.

Add DB Access Control

To add IP access control, follow the next procedure.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves 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. It moves to the EPAS(DBaaS) details page.
4. Click the More button and click the DB Access Control Management button. It moves to the DB Access Control Management page.
5. DB Access Control Management page, click the Search button. It takes a little time to search.
6. When the inquiry is complete, click the Add button. The Add DB Access Control popup window will open.
7. Add DB Access Control popup window, select DB username and enter 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. All services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves 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. It moves to the EPAS(DBaaS) details page.
4. Click the More button and click the DB Access Control Management button. It moves to the DB Access Control Management page.
5. DB Access Control Management page, click the Inquiry button. It takes a little time to inquire.
6. When the inquiry is complete, click the Delete button. The Delete popup window will open.
7. Delete popup window, click the OK button.

Managing Archives

It provides archive mode setting and archive log storage period setting functions, allowing users to flexibly set archive log management policies according to their operating environment. Additionally, it provides a function to manually delete Archive logs, allowing you to clean up unnecessary log data and effectively manage system resources.

Setting Archive Mode

To set the archive mode, follow the next procedure.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. On the EPAS(DBaaS) list page, click the resource for which you want to set the Archive mode. It moves to the EPAS(DBaaS) detail page.
4. Click the More button and click the Archive Settings Management button. It moves to the Archive Settings Management page.
5. Archive settings management page, click the Inquiry button. It takes a little time to inquire.
6. Click the Modify button and select whether to use it and the storage period.
7. When the modification is complete, click the Save button.

Delete Archive Files

To delete an Archive file, follow these steps.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. On the EPAS(DBaaS) list page, click the resource for which you want to set the Archive mode. It moves to the EPAS(DBaaS) details page.
4. Click the More button and click the Archive Settings Management button. It moves to the Archive Settings Management page.
5. Archive settings management page, if you want to delete all Archive files, click the Delete all Archives, if you want to delete only the backed up Archive files, click the Delete backed up Archives button.

DB Log export

It supports exporting log data that requires long-term storage in the 감사(Audit) log to Object Storage. Users can directly set the type of log to be stored, the destination bucket to be exported, and the cycle of exporting logs. It copies and stores logs to the specified Object Storage according to the set criteria. Additionally, to efficiently manage disk space, it provides an option to automatically delete the original log files while exporting logs to Object Storage at the same time. By utilizing this option, you can effectively secure the storage capacity while safely storing the necessary log data for a long time.

Set DB Log Export Mode

To set the DB log export mode, follow the following procedure.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. EPAS(DBaaS) list page, click on the resource you want to export DB Log. It moves to the EPAS(DBaaS) details page.
4. Click the More button and click the Export DB Log button. It moves to the Export DB Log page.
5. On the DB Log Export page, click the Register button. It moves to the DB Log Export Registration page.
6. On the DB Log Export Registration page, enter the corresponding information and click the Save button.

Managing DB Log Export

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

1. Click All Services > Database > EPAS(DBaaS) menu. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. On the EPAS(DBaaS) list page, click the resource you want to manage DB log export. It moves to the EPAS(DBaaS) detail page.
4. Click the More button and click the Export DB Log button. It moves to the Export DB Log page.
5. On the DB Log Export page, click the More button according to the type of log you want to manage, and then click the Export Now, Modify, or Cancel button.
   • Immediate Export: The selected log is exported to the existing Object Storage’s Bucket.
   • Modify: Modifies the DB log export mode setting.

• Cancel: Cancels the DB log export mode setting.

Minor Version Upgrade

It provides a version upgrade feature due to some functional improvements and security patches. Only minor version upgrade is supported within the same major version.

To perform a Minor Version upgrade, follow the procedure below.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. Click on the resource to be upgraded on the EPAS(DBaaS) list page. It moves to the EPAS(DBaaS) details page.
4. Click the Edit button in the Image/Version item. The Version Upgrade popup window opens.
5. In the 버전 업그레이드 popup window, select the modified version and whether to back up the settings, then click the 확인 button.
6. In the Version Upgrade Notification popup window, click the OK button.

Configuring Migration

It provides a migration function that synchronizes with the operating database in real-time and replicates in a replication manner without interrupting the service.

To configure the migration, follow the next procedure.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. Click on the resource to be migrated on the EPAS(DBaaS) list page. It moves to the EPAS(DBaaS) details page.
4. Click the More button and click the Migration Settings button. The Migration Settings popup window opens.
5. Check the instructions in the Migration Configuration popup window and click the OK button. It moves to the Migration Configuration page.
6. On the Migration Configuration page, enter the information and click the Check Connection button.
7. Once the connection is complete, click the Complete button.

Migrating Cluster to Master Cluster

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

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

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. On the EPAS(DBaaS) list page, click the resource to be promoted to Master. It moves to the EPAS(DBaaS) detail page.
4. Click the More button and click the Master Promotion button. The Master Promotion Notification popup window opens.
5. In the Master Promotion Alert popup window, click the Confirm button.

3 - DB Backup and Recovery

The user can set up the backup of EPAS(DBaaS) through the Samsung Cloud Platform Console and restore it with the backed-up file.

EPAS(DBaaS) Backup

To ensure that the user’s data is safely stored, EPAS(DBaaS) provides a data backup function based on its own backup command, and also provides a backup history function to check if the backup was done normally, and can also delete the backed-up files.

Setting up backup

The method of setting up a backup for EPAS(DBaaS) is described in EPAS(DBaaS) creation guide.

To modify the backup settings of the generated resource, follow these steps.

To set up a backup, follow these steps.

1. All Services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. EPAS(DBaaS) list page, click the resource to set the backup. Move to the EPAS(DBaaS) details page.
4. Click the Edit button of the backup item. The Backup Settings popup window opens.
5. If you set up a backup, click Use in the Backup Settings popup window, select the retention period, backup start time, and Archive backup cycle, and then click the OK button.
   • If you want to stop the backup settings, uncheck Backup Settings in the popup window and click the OK button.

Check Backup History

To view the backup history, follow these steps.

1. All services > Database > EPAS(DBaaS) menu is clicked. It moves to the Service Home page of EPAS(DBaaS).
2. Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. EPAS(DBaaS) list page, click the resource to check the backup history. It moves to the EPAS(DBaaS) detail page.
4. Click the Backup History button. The Backup History popup window opens.
5. Backup History popup window where you can check the backup status, version, backup start time, backup completion time, and capacity.

Deleting Backup Files

To delete the backup history, follow these steps.

1. Click All Services > Database > EPAS(DBaaS) menu. It moves to the Service Home page of EPAS(DBaaS).
2. Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. EPAS(DBaaS) list page, click the resource to check the backup history. It moves to the EPAS(DBaaS) details page.
4. Click the Backup History button. The Backup History popup window opens.
5. Backup History popup window, check the file you want to delete, and then click the Delete button.

EPAS(DBaaS) Recovery

In the event of a failure or data loss that requires restoration from a backup file, recovery is possible based on a specific point in time through the recovery function. When performing EPAS (DBaaS) recovery, a new server is created with the OS image at the initial provisioning time, and the DB is installed with the version at the backup point, and the recovery proceeds with the DB configuration information and data.

To recover EPAS(DBaaS), follow these procedures.

1. Click All Services > Database > EPAS(DBaaS) menu. It moves to the Service Home page of EPAS(DBaaS).
2. Service Home page, click the EPAS(DBaaS) menu. It moves to the EPAS(DBaaS) list page.
3. EPAS(DBaaS) Resource list page, click the resource you want to restore. It moves to the EPAS(DBaaS) detail page.
4. Database Recovery 버튼을 클릭하세요. Database Recovery 페이지로 이동합니다.
5. Database Recovery Configuration area, enter the corresponding information, and then click the Complete button.

4 - Configuring Read Replica

Users can create a Read Replica by entering the required information through the Samsung Cloud Platform Console and configuring detailed options.

Configuring Replica

Replica configuration allows you to create a read-only replica server. You can create up to 5 replicas per database.

To configure a replica, follow these steps:

1. All Services > Database > EPAS(DBaaS) menu, click. Move to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. Move to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource you want to configure the replica for. Move to the EPAS(DBaaS) Details page.
4. Click the Configure Replica button. Move to the Configure Replica page.
5. Enter the information in the Configure Replica section and click the Complete button.

Reconfiguring Replica

If a network failure or replication delay occurs between the master cluster, you can reconfigure the replica to re-replicate the master cluster’s data.

To reconfigure a replica, follow these steps:

1. All Services > Database > EPAS(DBaaS) menu, click. Move to the Service Home page of EPAS(DBaaS).
2. On the Service Home page, click the EPAS(DBaaS) menu. Move to the EPAS(DBaaS) List page.
3. On the EPAS(DBaaS) List page, click the resource you want to reconfigure the replica for. Move to the EPAS(DBaaS) Details page.
4. Click the Reconfigure Replica button. The Reconfigure Replica Notification popup window opens.
5. In the Reconfigure Replica Notification popup window, click the Confirm button.

Promoting Replica Cluster to Master

You can promote a configured replica cluster to a master cluster.

To promote a replica cluster to a master, follow these steps:

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

5 - Extension use

EPAS(DBaaS) Extension usage

The list of Extensions that can be installed in the current database can be checked with the following SQL sentence.

SQL> select * from pg_available_extensions;

In EPAS(DBaaS), the items that are installed additionally, excluding the default Extensions included in each version, are as follows.

In addition to the above items, if additional Extension installation is required, please refer to Support Center > Inquiry for inquiries.

• Once your inquiry is received, we will review and proceed with the installation. Please note that some Extensions may not work properly during Replica configuration and recovery.