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Image Management Service
Image Management Service
- What's New
- Function Overview
- Service Overview
- Getting Started
-
User Guide
- Managing Public Images
-
Creating a Private Image
- Introduction
- Creating a System Disk Image from a Windows ECS
- Creating a System Disk Image from a Linux ECS
- Creating a Windows System Disk Image from an External Image File
- Creating a Linux System Disk Image from an External Image File
- Creating a BMS System Disk Image
- Creating a Data Disk Image from an ECS
- Creating a Data Disk Image from an External Image File
- Creating a Full-ECS Image from an ECS
- Creating a Full-ECS Image from a CSBS Backup
- Creating a Full-ECS Image from a CBR Backup
- Creating a Windows System Disk Image from an ISO File
- Creating a Linux System Disk Image from an ISO File
- Importing an Image
- Fast Import of an Image File
-
Managing Private Images
- Modifying an Image
- Exporting Image List
- Checking the Disk Capacity of an Image
- Creating an ECS from an Image
- Deleting Images
- Sharing Images
- Exporting an Image
- Optimizing a Windows Private Image
-
Optimizing a Linux Private Image
- Optimization Process
- Checking Whether a Private Image Needs to be Optimized
- Uninstalling PV Drivers from a Linux ECS
- Changing the Disk Identifier in the GRUB Configuration File to UUID
- Changing the Disk Identifier in the fstab File to UUID
- Installing Native Xen and KVM Drivers
- Installing Native KVM Drivers
- Clearing System Logs
- Encrypting Images
- Replicating Images Within a Region
- Replicating Images Across Regions
- Tagging an Image
- Auditing Key Operations
- Windows Operations
- Linux Operations
- Permissions Management
-
Best Practices
- Overview
- Creating a Linux Image Using VirtualBox and an ISO File
- Cleaning Up the Disk Space of a Windows ECS
- Converting the Image Format
- Creating a Private Image Using Packer
- Configuring an ISO File as a Local Image Source
- Migrating Service Data Across Accounts (Data Disks)
-
API Reference
- Before You Start
- API Overview
- Calling APIs
- Getting Started
- IMS APIs
-
Native OpenStack APIs
-
Image (Native OpenStack APIs)
- Querying Images (Native OpenStack API)
- Querying Image Details (Native OpenStack API)
- Updating Image Information (Native OpenStack API)
- Uploading an Image (Native OpenStack API)
- Deleting an Image (Native OpenStack API)
- Creating Image Metadata (Native OpenStack API)
- Deleting an Image (Native OpenStack API v1.1 - Abandoned and Not Recommended)
- Querying Image Metadata (Native OpenStack API v1 - Abandoned and Not Recommended)
- Querying Image Details (Native OpenStack API v1.1 - Abandoned and Not Recommended)
- Image Tagging (Native OpenStack APIs)
- Image Schema (Native OpenStack APIs)
- Image Sharing (Native OpenStack APIs)
- API Version Query (Native OpenStack API)
-
Image (Native OpenStack APIs)
- Examples
- Permission Policies and Supported Actions
- Common Parameters
- Status Codes
- Error Codes
- SDK Reference
-
FAQs
-
Image Consulting
- Basic Concepts
- How Do I Select an Image?
- Are There Any Public Images Already Containing Certain Applications, Such as OpenVPN or PyTorch?
- How Do I Increase the Image Quota?
- What Are the Differences Between Images and Backups?
- Can I Tailor an Image?
- How Can I Back Up the Current Status of an ECS for Restoration in the Case of a System Fault?
- How Can I Apply a Private Image to an Existing ECS?
- Can I Import Data from a Data Disk Image to a Data Disk?
- Can I Use Private Images of Other Accounts?
- End-of-Support for OSs
-
Image Creation
- General Creation FAQs
- Full-ECS Image FAQs
- How Can I Use a Backup to Create an EVS Disk or ECS?
- Is There Any Difference Between the Image Created from a CSBS/CBR Backup and That Created from an ECS?
- Why Can't I Find an ISO Image When I Want to Use It to Create an ECS or Change the OS of an ECS?
- How Do I Create a Full-ECS Image Using an ECS That Has a Spanned Volume?
- Why Is Sysprep Required for Creating a Private Image from a Windows ECS?
- How Do I Handle the Startup Failure of a Windows ECS Created from a Windows Image Generalized by Sysprep?
- What Do I Do If I Cannot Create an Image in ZVHD2 Format Using an API?
- Image Sharing
- OS
-
Image Import
- Can I Use Images in Formats not Described in This Document?
- What Are the Impacts If I Do Not Pre-configure an ECS Used to Create a Private Image?
- How Do I Import an OVF or OVA File to the Cloud Platform?
- What Do I Do If I Chose the Wrong OS or System Disk Capacity When Registering a Private Image?
- Why Did My VHD Upload Fail? Why Does the System Say the System Disk in the VHD Image File Is Larger Than What I Specified on the Management Console?
-
Image Export
- Can I Download My Private Images to a Local PC?
- Can I Use the System Disk Image of an ECS on a BMS After I Export It from the Cloud Platform?
- Why Is the Image Size in an OBS Bucket Different from That Displayed in IMS?
- Can I Download a Public Image to My PC?
- What Are the Differences Between Import/Export and Fast Import/Export?
- Why the Export Option Is Unavailable for My Image?
-
Image Optimization
- Must I Install Guest OS Drivers on an ECS?
- Why Do I Need to Install and Update VirtIO Drivers for Windows?
- What Will the System Do to an Image File When I Use the File to Register a Private Image?
- How Do I Configure an ECS, a BMS, or an Image File Before I Use It to Create an Image?
- What Do I Do If a Windows Image File Is Not Pre-Configured When I Use It to Register a Private Image?
- What Do I Do If a Linux Image File Is Not Pre-Configured When I Use It to Register a Private Image?
- How Do I Enable NIC Multi-Queue for an Image?
- How Do I Configure an ECS to Use DHCPv6?
- How Do I Clean Up the Disk Space of a Windows ECS?
- How Do I Make a System Disk Image Support Fast ECS Creation?
- Why Did I Fail to Install Guest OS Drivers on a Windows ECS?
- How Do I Install Native Xen and KVM Drivers?
- Image Replication
- Image Deletion
- Image Encryption
- Accounts and Permissions
- Cloud-Init
-
ECS Creation
- Can I Change the Image of a Purchased ECS?
- Can I Change the Specifications Defined by a Private Image When I Use the Image to Create an ECS?
- Can I Specify the System Disk Capacity When I Create an ECS Using an Image?
- What Do I Do If a Partition Is Not Found During the Startup of an ECS Created from an Imported Private Image?
- What Do I Do If the Disks of a CentOS ECS Created from an Image Cannot Be Found?
- What Do I Do If I Enabled Automatic Configuration During Image Registration for an ECS Created from a Windows Image and Now It Won't Start?
- What Do I Do If an Exception Occurs When I Start an ECS Created from an Image Using UEFI Boot?
- Billing
-
Image Consulting
- Videos
On this page
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Help Center/
Image Management Service/
User Guide/
Managing Private Images/
Optimizing a Linux Private Image/
Checking Whether a Private Image Needs to be Optimized
Checking Whether a Private Image Needs to be Optimized
Updated on 2024-03-04 GMT+08:00
- If the virtualization type is Xen, optimization is required.
- If the virtualization type is KVM and VirtIO drivers are not installed, optimization is required.
- If the virtualization type is KVM and VirtIO drivers are installed, optimization is not required.
Procedure
- Run the following command to check the virtualization type of an ECS:
lscpu
- If the value of Hypervisor vendor is Xen, optimize the private image as instructed in Process.
- If the value of Hypervisor vendor is KVM, go to the next step for further check.
Figure 1 Checking the virtualization type of a Linux ECS
- Check whether VirtIO drivers have been installed.
- CentOS/EulerOS
For initramfs, run the following command:
lsinitrd /boot/initramfs-`uname -r`.img | grep virtio
For initrd, run the following command:
lsinitrd /boot/initrd-`uname -r` | grep virtio
- Ubuntu/Debian
- SUSE/openSUSE
If virtio is displayed, VirtIO drivers have been installed. For more information, see Creating a Linux System Disk Image from an External Image File.
Otherwise, VirtIO drivers have not been installed. Optimize the private image as instructed in Process.
- CentOS/EulerOS
Parent topic: Optimizing a Linux Private Image
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