Linux System Image Limit

| Limit Type| Introduction| |----------|----------| | Operating system| It supports the CentOS, Ubuntu, Debian, OpenSUSE and SUSE distribution images.| | Image format| It supports Raw and qcow2. For the version compatibility, you need to confirm the qcow2 format before uploading. See Image Format Checking for details.| | Image size| The image vsize is not more than 500G.| | Network| Obtain the network address dynamically. IPV6 is not supported temporarily. The multi-ENI is not supported.| | Driver| The virtio driver of virtualization platform KVM must be installed for the image. See Linux Import Image for Checking Virtio Driver for details.| | Configure cloud-init| It is recommended that you install cloudinit for the image. See 【Install cloud-init (Linux)】 for details.| |File system |The Linux image temporarily supports ext3, ext4 (which cannot have metadata_csum feature), and xfs file systems (which does not contain V5 xfs) but does not support LVM partitioning.| Other suggestions

1. Do not modify /etc/issue*. Otherwise, the system distribution can not be identified normally, which causes the system creation failure.
2. Do not modify /boot/grub/menu.lst. Otherwise, the system fails to start
3. Do not modify /etc/shadow to read-only. Otherwise, the password file can not be changed, and you can not log in to the system
4. Do not start selinux by modifying /etc/selinux/config. Otherwise, the system fails to start
5. Do not modify the critical system files, such as /sbin, /bin and /lib* directory
6. Do not adjust the system disk partition. At present, the single root partition is supported only. The multi-partition may cause the data injection failure
7. Check the remaining space of system disk to ensure that the system disk is not full
8. Verify the integrity of file system before importing

Windows System Image Limit

| Limit Type| Introduction| |----------|----------| | Operating system| Windows Server 2008, Windows Server 2012 and Windows Server 2016 Data Center Version| | Image format| It supports Raw and qcow2. For the version compatibility, you need to confirm the qcow2 format before uploading. See Image Format Checking for details.| | Image size| The image vsize is not more than 500 GB.| | Network| Obtain the network address dynamically. One ENI is supported only. IPV6 is not supported temporarily.| | Driver| The virtio driver of virtualization platform KVM must be installed for the image. The virtio driver is not installed on the Windows system by default. Install the virtio driver before you import an image.| | cloud-init| It is recommended that you install cloudbase-init for the image. See 【Install cloudbase-init (Windows)】 for details.| |File system | Only supports the NTFS file system using the MBR partitioning but does not GPT partitioning and logic volume management.| Other suggestions

1. Verify the integrity of file system before you import the image of Windows operating system.
2. Check the remaining space of system disk to ensure that the system disk is not full.
3. Do not modify the critical system files.