Method and apparatus for remote installation of an operating system over a network connection

• US 6,963,981 B1
• Filed: 01/29/2002
• Issued: 11/08/2005
• Est. Priority Date: 01/29/2001
• Status: Active Grant

• Current Assignee: Akamai Technologies, Inc.
• Original Assignee: Akamai Technologies, Inc.
• Inventors: Giambrone, Leonard T., Bailey, R. Andrew
• Primary Examiner(s): Cottingham, John R.
• Application Number:
  US10/059,729
• Time in Patent Office: 1,379 Days
• Field of Search: 713/200
• US Class Current: 726/22
• CPC Class Codes: G06F 8/60 Software deployment
• CPC Class Codes: G06F 9/4406 Loading of operating system

Abstract

A method for remote installation of a target operating system is carried out on a machine operating a source operating system. In one embodiment, it is presumed that the source operating system was booted from a first bootable region of a storage associated with the machine. According to the method, a copy of the source operating system together with the target operating system are delivered to the machine and stored in a second bootable region of the storage. The copy of the source operating system may be stored in a first partition of the second bootable region of the storage, and the target operating system may be stored in a second partition of the second bootable region. A boot loader is then configured to boot the copy of the source operating system from the second bootable region of the storage. The machine is then re-booted. At this point, the machine is still running the source operating system, although in this case that operating system was booted from the second bootable region of the storage. The original source operating system (from the first bootable region) is then removed, and the boot loader is re-configured to boot the target operating system from the second bootable region of the storage. The machine is then re-booted again, after which the target operating system is operational. In one embodiment, the first and second bootable regions may be separate hard disks, and the source and target operating systems are Linux and Windows, or vice versa.

Claims

1. A method of replacing a first operating system executing on a computer having a storage, the storage having at least first and second bootable regions, wherein the first operating system was booted from the first bootable region, the method comprising the steps of:

remotely re-booting the computer to boot a copy of the first operating system located on the second bootable region;

removing the first operating system from the first bootable region;

copying a second operating system onto the first bootable region; and

remotely re-booting the computer to boot the second operating system from the first bootable region.

2. The method as described in claim 1 wherein the second bootable region has first and second sub-regions, wherein the copy of the first operating system is located in the first sub-region of the second bootable region and the second operating system is copied onto the first bootable region from the second sub-region of the second bootable region.

3. The method as described in claim 2 further including the step of delivering the copy of the first operating system and the second operating system to the computer.

4. The method as described in claim 3 wherein the copy of the first operating system is delivered to the computer in a compressed format.

5. The method as described in claim 3 wherein the second operating system is delivered to the computer in a compressed format.

6. The method as described in claim 4, the method further comprising the step of decompressing the copy of the first operating system prior to copying a second operating system onto the first bootable region.

7. A method of replacing a first operating system executing on a server having first and second storage disks, wherein the first operating system is booted from the first storage disk, comprising the steps of:

receiving, from a remote location, (i) a packed version of the first operating system and (ii) a packed version of a second operating system desired to be installed on the server;

unpacking the first operating system onto a first storage partition of the second disk;

storing the packed version of the second operating system onto a second storage partition of the second disk;

remotely re-booting the server to boot the first operating system from the first storage partition of the second disk;

removing the first operating system from the first disk;

unpacking the second operating system onto a partition on the first disk; and

remotely re-booting the server to boot the second operating system from the partition on the first disk.

8. The method as described in claim 7 wherein the step of remotely re-booting the server to boot the first operating system comprises:

modifying a boot loader of the server to boot the first operating system from the first storage partition of the second disk.

9. The method as described in claim 8 wherein the step of remotely re-booting the server to boot the second operating system comprises:

reconfiguring the boot loader to boot the second operating system from the partition on the first disk.

10. The method as described in claim 7 wherein the packed version of the first operating system is encrypted.

11. The method as described in claim 10, further comprising decrypting the packed version prior to the step of:

unpacking the first operating system onto a first storage partition.

12. The method as described in claim 7 wherein the step of removing the first operating system from the first disk removes any previously used partitions on the first disk.

13. The method as described in claim 7, further comprising:

preserving network configuration data used by the first operating system to enable the server executing the second operating system following the step of rebooting the server to operate under the second operating system to be reached at a network address used by the server executing the first operating system.

14. The method as described in claim 7, further comprising:

preserving security data used to control access to the server executing the first operating system to enable the server executing the second operating system following the step of rebooting the server to operate under the second operating system to be accessed using at least one security setting used by the server executing the first operating system.

15. The method as described in claim 7 wherein the packed versions of the first operating system and the second operating system are received over a content delivery network.

16. The method as described in claim 7 wherein the first operating system is a Linux-based operating system and the second operating system is a Windows-based operating system, or vice-versa.

17. A method of replacing a first operating system executing on a computer having a storage, the storage having at least first and second bootable regions, wherein the first operating system was booted from the first bootable region, comprising the steps of:

remotely re-booting the computer to boot a copy of a second operating system located on the second bootable region;

removing the first operating system from the first bootable region;

copying a third operating system onto a bootable region other than the second bootable region; and

remotely re-booting the computer to boot the third operating system from the bootable region other than the second bootable region.

18. In a content delivery network having a set of content servers for caching and serving content on behalf of participating content providers, a method of replacing a first operating system executing on a content server having first and second storage disks, wherein the first operating system is booted from the first storage disk, comprising the steps of:

(a) delivering, over the content delivery network;

(i) a packed version of the first operating system and (ii) a packed version of a second operating system desired to be installed on the content server;

(b) unpacking the first operating system onto a first storage partition of the second disk;

(c) storing the packed version of the second operating system onto a second storage partition of the second disk;

(d) remotely re-booting the content server to boot the first operating system from the first storage partition of the second disk;

(e) removing the first operating system from the first disk;

(f) unpacking the second operating system onto a partition on the first disk; and

(g) remotely re-booting the content server to boot the second operating system from the partition on the first disk.