Upgrade CentOS6.5 to CentOS7

Redhat provides a redhat-upgrade-tool upgrade tool. [1] configure the software source # vim/etc/yum. repos. d/upgrade. repo [upgrad

Redhat provides a redhat-upgrade-tool upgrade tool;

[1] configuring software sources

# Vim/etc/yum. repos. d/upgrade. repo [upgrade] name = upgradebaseurl = http://dev.centos.org/centos/6/upg/x86_64/enable=1gpgcheck=0

[2] installing software tools

Yum-y install preupgrade-assistant-contents redhat-upgrade-tool preupgrade-assistant

[3] check potential problems before upgrade

# PreupgPreupg tool doesn' t do the actual upgrade. please ensure you have backed up your system and/or data in the event of a failed upgradethat wowould require a full re-install of the system from installation media. do you want to continue? Y/nyGathering logs used by preupgrade assistant: All installed packages: 01/10... finished (time 00: 00 s) All changed files: 02/10... finished (time 00: 40 s) Changed config files: 03/10... finished (time 00: 00 s) All users: 04/10... finished (time 00: 00 s) All groups: 05/10... finished (time 00: 00 s) Service statuses: 06/10... finished (time 00: 00 s) All installed files: 07/10... finished (time 00: 01 s) All local files: 08/10... finished (time 00: 03 s) All executable files: 09/10... finished (time 00: 00 s) RedHat signed packages: 10/10... finished (time 00: 00 s) Assessment of the system, running checks/SCE scripts: 001/100... done (Configuration Files to Review) 002/100... done (File Lists for Manual Migration) 003/100... done (Bacula Backup Software) 004/100... done (MySQL configuration) 005/100... done (Migration of the MySQL data stack) 006/100... done (General changes in default MySQL implementation) 007/100... done (PostgreSQL upgrade content) Assessment finished (time 00: 00 s) Result table with checks and their results for main contents: usage | System kickstart | notapplicable | YUM | notapplicable | Check for usage of dangerous range of UID/GIDs | notapplicable | Incorrect usage of reserved UID/GIDs | notapplicable | NIS ypbind config files back-up | notapplicable | NIS Makefile back-up | notapplicable | NIS server maps check | notapplicable | NIS server MAXUID and MAXGID limits check | notapplicable | NIS server config file back-up | notapplicable | invalid Tarball with results is stored here/root/preupgrade-results/preupg_results-140716022514.tar.gz. the latest assessment is stored in directory/root/preupgrade. upload results to UI by command: e.g. preupg-u http://127.0.0.1:8099/submit/ -R/root/preupgrade-results/preupg_results-* .tar.gz.

[4] start upgrading

# Rpm -- import http://centos.excellmedia.net/7.0.1406/ OS /x86_64/RPM-GPG-KEY-CentOS-7

The preceding commands can be upgraded normally;

# Redhat-upgrade-tool -- network 7.0 -- instrepo http://centos.excellmedia.net/7.0.1406/ OS /x86_64/

This force seems unfriendly, and the production environment should be used with caution;

Update to this step:

Setting up repos .... treeinfo | 1.1 kB 00: 00 getting boot images... vmlinuz-redhat-upgrade-tool | 4.7 MB 01: 38initramfs-redhat-upgrade-tool.img | 32 MB 14: 45 setting up update... finding updates 100% [======================================== ========================================================== ======================================] (1/272): acl-2.2.51-12.el7.x86_64.rpm | 81 kB (2/272): attr-2.4.46-12.el7.x86_64.rpm | 66 kB (3/272): audit-2.3.3-4.el7.x86_64.rpm | 223 kB (4/272): audit-libs-2.3.3-4.el7.x86_64.rpm | 77 kB (5/272 ): authconfig-6.2.8-8.el7.x86_64.rpm | 399 kB (6/272): basesystem-10.0-7.el7.centos.noarch.rpm | 5.0 kB (7/272): bash-4.2.45-5.el7.x86_64.rpm | 1.0 MB (270/272): yum-plugin-fastestmirror-1.1.31-24.el7.noarch.rpm | 28 kB (271/272 ): zlib-1.2.7-13.el7.x86_64.rpm | 89 kB (272/272): zlib-devel-1.2.7-13.el7.x86_64.rpm | 49 kB setting up system for upgradeFinished. reboot to start upgrade.

# Reboot

[5] upgrade completed:

# Cat/etc/redhat-release CentOS Linux release 7.0.1406 (Core)

This article is from the "Siberian wolf" blog, please be sure to keep this source http://kernal.blog.51cto.com/8136890/1532150