Download the server from ISO
Bootable ISO disks (from images in format .iso) contain the operating system distribution and are used as an OS installer on the cloud server. They can also be used for recovery work on the server.
Create a cloud server from an ISO disk
- Download the ISO image.
- Create a cloud server. Select the downloaded image as the source. Together with the server, a system network ISO disk will be created with the following name
virtual-cd-rom-for-Server.
Connecting an ISO disk to an existing cloud server is not recommended. If you want to create a bootable disk for later use, create a new cloud server from the ISO image, configure the server, and install the required software. Then create an image from the local or network disk of the server — it will be in the format of .raw.
Restore the server
Cloud server recovery may be required in several cases, such as:
- you need to recover a very important file;
- there are errors in the boot scripts or network configuration.
A common way to restore a server to operation is to use boot into Rescue mode. Technically, an image specially prepared by Selectel specialists is used for this purpose, which allows access to all virtual machine settings, fixing any configuration error, restoring the file system or can be used for other needs.
Sometimes it can be useful to perform a server recovery by booting from a special ISO disk and then patching the server's network disk.
Fix the network drive
- Turn off the cloud server.
- Disconnect the network drive from the server.
- Create a cloud server from the bootable ISO image.
- Connect a network drive to the new server that needs to be fixed.
- Perform disk recovery on the new cloud server. The network disk is now fixed.
- Shut down the new server and disconnect the patched network drive from it.
- Connect the network disk back to the previous server or create a new server with the corrected network disk.