Operating system installation using logical volumes
Disclosed herein are methods, systems, and processes to support hard drive installation of an operating system from a logical volume partition. An initial volatile memory disk is extracted from an operating system (OS) installation image. A logical volume binary and shared libraries are added to the extracted initial volatile memory disk and then executed. Executing the logical volume binary and the shared libraries modifies a process performed by an OS installation application. The extracted initial volatile memory disk is then repackaged into a modified initial volatile memory disk.
1. A method comprising:
extracting an initial volatile memory disk from an operating system (OS) installation image, wherein
the initial volatile memory disk comprises an OS installation application;
adding a logical volume binary and one or more shared libraries to the extracted initial volatile memory disk; and
repackaging the extracted initial volatile memory disk into a modified initial volatile memory disk.
2. The method of claim 1 , further comprising:
executing the logical volume binary and the one or more shared libraries, wherein the executing modifies a process performed by the OS installation application.
3. The method of claim 2 , further comprising:
storing a kernel and the repackaged initial volatile memory disk on a boot partition;
storing an ISO image on a logical volume, wherein; and
permitting an OS installation operation from the logical volume as part of the process.
4. The method of claim 3 , wherein
modifying the process in the OS installation application comprises
adding a device mapper to a kernel of an OS, wherein
the OS boots a computing device, and
the computing device performs the OS installation operation; and
determining that one or more nodes listed in the device mapper correspond to one or more mapped devices loaded by the device mapper.
5. The method of claim 4 , wherein
modifying the process in the OS installation application further comprises
scanning one or more sub disks associated with the computing device to identify one or more physical volumes and one or more logical volume groups, and
activating each logical volume in the one or more logical volume groups by executing the logical volume binaries.
6. The method of claim 5 , wherein
the process comprises performing the OS installation operation by installing or updating the OS of the computing device from the logical volume associated with the computing device.
7. A non-transitory computer readable storage medium comprising program instructions executable to:
extract an initial volatile memory disk from an operating system (OS) installation image, wherein
the initial volatile memory disk comprises an OS installation application;
add a logical volume binary and one or more shared libraries to the extracted initial volatile memory disk; and
repackage the extracted initial volatile memory disk into a modified initial volatile memory disk.
8. The non-transitory computer readable storage medium of claim 7 , further comprising:
executing the logical volume binary and the one or more shared libraries, wherein the executing modifies a process performed by the OS installation application.
9. The non-transitory computer readable storage medium of claim 8 , further comprising:
storing a kernel and the repackaged initial volatile memory disk on a boot partition;
storing an ISO image on a logical volume; and
permitting an OS installation operation from the logical volume as part of the process.
10. The non-transitory computer readable storage medium of claim 9 , wherein
modifying the process in the OS installation application comprises
adding a device mapper to a kernel of an OS, wherein
the OS boots a computing device, and
the computing device performs the OS installation operation; and
determining that one or more nodes listed in the device mapper correspond to one or more mapped devices loaded by the device mapper.
11. The non-transitory computer readable storage medium of claim 10 , wherein
modifying the process in OS installation application further comprises
scanning one or more sub disks associated with the computing device to identify one or more physical volumes and one or more logical volume groups, and
activating each logical volume in the one or more logical volume groups by executing the logical volume binaries.
12. The non-transitory computer readable storage medium of claim 11 , wherein
the process comprises performing the OS installation operation by installing or updating the OS of the computing device from the logical volume associated with the computing device.
13. A system comprising:
one or more processors; and
a memory coupled to the one or more processors, wherein the memory stores program instructions executable by the one or more processors to:
extract an initial volatile memory disk from an operating system (OS) installation image, wherein
the initial volatile memory disk comprises an OS installation application;
add a logical volume binary and one or more shared libraries to the extracted initial volatile memory disk; and
repackage the extracted initial volatile memory disk into a modified initial volatile memory disk.
14. The system of claim 13 , further comprising:
executing the logical volume binary and the one or more shared libraries, wherein the executing modifies a process performed by the OS installation application.
15. The system of claim 14 , further comprising:
storing a kernel and the repackaged initial volatile memory disk on a boot partition;
storing an ISO image on a logical volume; and
permitting an OS installation operation from the logical volume as part of the process.
16. The system of claim 15 , wherein
modifying the process in OS installation application comprises
adding a device mapper to a kernel of an OS, wherein
the OS boots a computing device, and
the computing device performs the OS installation operation; and
determining that one or more nodes listed in the device mapper correspond to one or more mapped devices loaded by the device mapper.
17. The system of claim 16 , wherein
modifying the process in OS installation application further comprises
scanning one or more sub disks associated with the computing device to identify one or more physical volumes and one or more logical volume groups, and
activating each logical volume in the one or more logical volume groups by executing the logical volume binaries.
18. The system of claim 17 , wherein
the process comprises performing the OS installation operation by installing or updating the OS of the computing device from the logical volume associated with the computing device.