# How Do I Configure an ECS, BMS, or Image File Before I Use It to Create an Image?

#### ECS or Image File Configurations

Table 1 ECS configurations
OS | Configuration | Reference
--- | --- | ---

Windows

- Set the NIC to DHCP.
- Enable remote desktop connection.
- (Optional) install special Windows drivers.
- (Optional) Install Cloudbase-Init.
- Install the Guest OS drivers, including the PV driver and UVP VMTools.
- Run Sysprep.

Creating a System Disk Image from a Windows ECS

Linux

- Set the NIC to DHCP.
- (Optional) install special Linux drivers.
- (Optional) Install Cloud-Init.
- Delete files from the network rule directory.
- Change the disk identifier in the GRUB configuration file to UUID.
- Change the disk identifier in the fstab file to UUID.
- Install native Xen and KVM drivers.
- Detach data disks from the ECS.
- Configure console logging.

Creating a System Disk Image from a Linux ECS

Table 2 Image file configurations
OS | Configuration Item | Reference
--- | --- | ---

Windows

- Set the NIC to DHCP.
- Enable remote desktop connection.
- Install the Guest OS drivers, including the PV driver and UVP VMTools.
- (Optional) Install Cloudbase-Init.
- (Optional) Enable NIC multi-queue.

Preparing an Image File

Linux

- Delete files from the network rule directory.
- Set the NIC to DHCP.
- Install native Xen and KVM drivers.
- Change the disk identifier in the GRUB configuration file to UUID.
- Change the disk identifier in the fstab file to UUID.
- Delete the automatic attachment information of non-system disks from the /etc/fstab file.
- (Optional) Install Cloud-Init.
- (Optional) Enable NIC multi-queue.

Preparing an Image File

- When registering an external image file as a private image, you are advised to perform the preceding operations on the VM where the external image file is located.
- When registering a Windows external image file as a private image, if the Guest OS drivers are installed, the cloud platform will check the image file after you select Enable automatic configuration. If the GuestOS drivers are not installed, the cloud platform will try to install them.

#### BMS or Image File Configurations

Table 3 BMS configurations
OS | Configuration Item | Reference
--- | --- | ---

Windows

- Install software in the bms-network-config package.
- Install Cloudbase-Init.
- Delete residual files from the OS.

For details, see "Creating a Private Image from a BMS" in Bare Metal Server User Guide.

Linux

- Install software in the bms-network-config package.
- Install Cloud-Init.
- Delete residual files from the OS.

For details, see "Creating a Private Image from a BMS" in Bare Metal Server User Guide.

Table 4 Image file configurations
OS | Configuration Item | Reference
--- | --- | ---

Windows

- Install drivers for x86 v5 BMSs.
- Install Cloudbase-Init.
- Install software in the bms-network-config package.
- (Optional) Install the SDI iNIC driver.
- Set the Windows time zone.
- Set the virtual memory.
- (Optional) Configure automatic Windows update.
- Configure SID.

Bare Metal Server Image Creation Guide

Linux

- Install and configure Cloud-Init.
- Modify the hardware device driver that boots the OS.
- Install software in the bms-network-config package.
- (Optional) Install the SDI iNIC driver.
- (Optional) Install the Hi1822 NIC driver.
- (Optional) Install the IB driver.
- (Optional) Install drivers for x86 V5 BMSs.
- (Optional) Install the UltraPath software.
- Perform security configuration.
- Configure remote login to the BMS.
- Configure automatic root partition expansion.

Bare Metal Server Image Creation Guide

Parent topic: Image Optimization