Mirror image
What is a mirror
An image is a template of a bare-metal server's runtime environment, which includes a specific operating system and runtime environment, and sometimes additional preinstalled applications. An image is a copy file that contains all the data on your system's disk.
Type of image
Depending on the mirror source, there are public, private, and shared mirrors.
| Types of mirrors | Instructions |
|---|---|
| Public mirroring | Common standard operating system images, visible to all users, including the operating system as well as preinstalled public applications or services. |
| Private images | Contains the operating system, pre-installed public apps, and the user's private apps, visible only to the user personally. Choosing a private image to create a bare metal server can save you the time of configuring your bare metal server repeatedly. |
| Shared images | Private images shared by other users. |
Public images
Public images are official images provided by FCloud, adapted for bare-metal server compatibility and installed with necessary initialization plugins. They can be used by all users, covering most mainstream operating systems. Depending on the bare metal server specifications, the available images will be different.
Public Mirror Features
Type of operating system: Linux-based system with regular updates and maintenance.
Software support: It integrates some bare-metal servers' storage, network and related plug-ins that users rely on for normal use of basic functions.
Note:
These plugins are basic plugins guaranteed by bare metal server functions. Please do not delete or modify them, otherwise it will affect your basic functions.
Software Description
| Software | Description |
|---|---|
| Cloud-init | Cloud-init is an open source Cloud initializer that can initialize the configuration of custom information (hostname, key, user data, etc.) specified in a newly created bare metal server. |
| One-click password reset plugin | Bare Metal Server provides a one-click password reset function, when the system password is lost or expired, if your bare metal server has a password reset plugin installed in advance, you can set a new password on the console page. |
| bms-network-config network configuration plugin | The network initialization plug-in is mainly used for the automatic configuration of bare metal server network in the delivery process and the recovery of bare metal server network in the scenario of network interruption caused by user misoperation. The plug-in is located in the directory of "/opt/huawei", please do not delete or alter it. |
| SDI card front-end driver plug-in | The SDI card front-end driver plug-in is installed in the image, so that the bare metal server can support mounting cloud hard disk, and support booting from cloud hard disk to achieve rapid distribution ability. |
Compatible adaptation: Compatible adaptation is made to the server hardware.
Security: Public images are highly stable and licensed.
Limitations: No restrictions on use.
Private mirrors
Contains the operating system, pre-installed public apps, and the user's private apps. Choosing a private image to create a bare metal server can save you the time of configuring your bare metal server repeatedly.
Private Image Features
Compatible adaptation: Only the same model of server used to export the image is adapted. There is no guarantee that other models of bare-metal servers will be correctly deployed.
Function support: users can freely create and delete private images, and deploy and reinstall servers using private images. Private image also supports the following operations:
o Sharing images between different accounts.
o Copy images between different areas.
o Export the mirror to a personal OBS bucket.
Limit: Each user can create up to 50 private images.
Cost: Private images will be charged a storage fee.
Shared images
Private images shared by other users.
Mirroring application scenarios
Deploy software environments in bulk
A private image is created by packaging the operating system, partition, and software information of the deployed bare metal server, and then the image is used to create a batch of bare metal server instances. The new instances will have the same environment information.
Backup of server running environment
Make an image of a bare metal server instance to back up the environment. When the instance's software environment fails and does not function properly, you can use an image recovery.