WO2018098834A1

WO2018098834A1 - Method for ensuring normal booting of linux operating system

Info

Publication number: WO2018098834A1
Application number: PCT/CN2016/108512
Authority: WO
Inventors: 祝启政
Original assignee: 邦彦技术股份有限公司
Priority date: 2016-11-29
Filing date: 2016-12-05
Publication date: 2018-06-07
Also published as: CN106776128A; CN106776128B

Abstract

A method for ensuring normal booting of a Linux operating system, comprising the following steps: upon partitioning a hard disk, creating a partition having the same size as an original root partition to serve as a snapshot partition (S10); installing the Linux operating system to the original root partition (S20); modifying an original initramfs mirror image in /boot (S30); the step of modifying the original initramfs mirror image in /boot specifically comprising: using the gunzip command and the cpio command to unzip the original initramfs mirror image to a preset directory (S310); adding the device-mapper package to the preset directory; if the dmsetup command is not present in the sbin sub-directory, placing the dmsetup command in the device-mapper package into the sbin sub-directory (S320); editing the init script so as to modify code in a mounted root file system thereof and add a corresponding code logic thereto (S330); and generating a new initramfs mirror image to overwrite the original initramfs mirror image (S340). By utilizing the aforesaid method, the system can be automatically recovered and normally booted without human intervention when the file system in the hard disk is damaged, thus guaranteeing the operating system can be normally booted up.

Description

A method for guaranteeing normal startup of Linux operating system

Technical field

The present invention relates to the field of Linux operating systems, and in particular, to a method for ensuring normal startup of a Linux operating system.

Background technique

At present, because the MTCA platform is widely used in occasions where the environmental stability is not high, it often faces the situation that some equipments are powered off, which will affect the hard disk being read and written, such as incomplete data and file system damage. In particular, the latter can cause the system on the board to fail to start and the board will not work properly. The boards equipped with hard disks in the MTCA platform are mainly x86 computing boards. Due to the versatility of the x86 architecture, various manufacturers generally do not specifically develop systems for cost saving, convenient use, and rapid deployment. Stable Linux distributions, such as Redhat, CentOS, Ubuntu Server, etc. These systems will take a conservative repair if they detect a file system corruption on the hard disk at boot time, that is, only if the file is not actually damaged, but the file system record table is In the non-clean state, a minor state repair is performed, and the repair starts normally after the repair succeeds. If there is indeed a file corruption, the system will not be repaired and will not start normally. Instead, it will enter a maintenance mode, requiring the user to connect the display to the system, manually do some backup data, repair the system and the like; this mode is just a Minimize the system and not run the various software and services deployed by the user, which means the board is not working properly. At present, in the case of file corruption and system inability to start the x86 computing board installed with these systems, it is mainly manually repaired by the user connected display, which not only requires high technical capabilities of the user, but also in the MTCA application, the display and the skilled People are not always on the scene, and the problem of finding and solving problems will be greatly delayed. This problem has a bad influence on the work.

Summary of the invention

The main purpose of the present invention is to provide a method for ensuring the normal startup of the Linux operating system. When the file system on the hard disk is damaged, the Linux operating system can still be started normally.

To achieve the above objective, the method for ensuring normal startup of a Linux system includes the following steps: when partitioning a hard disk, create a partition having the same size as the original root partition as a snapshot partition;

Claims

Installing the Linux operating system into the original root partition; modifying the original initramfs image file in /boot; the step of modifying the original initramfs image file in /boot specifically includes: using the gunzip command and the cpio command to use the original The initramfs image file is unpacked into a predetermined directory; the device-mapper package is added to the predetermined directory; when the dmsetup command does not exist in the sbin subdirectory, the dmsetup command in the included device-mapper package is placed. Go to the sbin subdirectory; edit the init script, modify the code that mounts the root filesystem, add the appropriate code logic, and generate a new initramfs image file to overwrite the original initramfs image file.

Preferably, the original initramfs image file is a cpio file compressed in gz format.

Preferably, the original initramfs image file in the modified /boot is specifically an init script program that modifies the original initramfs image file, and joins the dmsetup program to the sbin directory depending on whether it exists or not.

Preferably, the Linux system is a Red Hat, CentOS or Ubuntu Server distribution system.

Preferably, the method for ensuring normal startup of the Linux system is applied to a situation in which the hard disk file system is damaged in the MTCA environment.

Preferably, the Packages are present in an installation CD.

Preferably, the corresponding code logic comprises: determining whether to mount the snapshot partition, whether to check and repair the file system according to the content of the configuration file, and whether to merge the new file.

Preferably, the step of generating a new initramfs image file to overwrite the original initramfs image file is specifically generating a new initramfs image file by using the cpio command and the gzip command to overwrite the original initramfs image file.

Preferably, the predetermined directory is a directory initramfs-new, and the device-mapper software package is specifically a device-mapper software package in Packages.

In the present invention, after the above method for ensuring the normal startup of the Linux system is adopted, when the file system on the hard disk is damaged, the system can be automatically restored and started normally without manual intervention, and the operating system can be started normally.