redhat提供了一个redhat-upgrade-tool的升级工具； 1、配置软件源 # vim /etc/yum.repos.d/upgrade.repo 代码: [upgrade] name=upgrade baseurl=http://dev.centos.org/centos/6/upg/x86_64/ enable=1 gpgcheck=0 2、安装软件工具 代码: yum -y install preupgrade-assistant-contents redhat-upgrade-tool preupgrade-assistant 3、升级前检查潜在问题 # preupg 代码: Preupg tool doesn't do the actual upgrade. Please ensure you have backed up your system and/or data in the event of a failed upgrade that would require a full re-install of the system from installation media.Do you want to continue? y/n y Gathering logs used by preupgrade assistant: All installed packages : 01/10 ...finished (time 00:00s) All changed files : 02/10 ...finished (time 00:40s) Changed config files : 03/10 ...finished (time 00:00s) All users : 04/10 ...finished (time 00:00s) All groups : 05/10 ...finished (time 00:00s) Service statuses : 06/10 ...finished (time 00:00s) All installed files : 07/10 ...finished (time 00:01s) All local files : 08/10 ...finished (time 00:03s) All executable files : 09/10 ...finished (time 00:00s) RedHat signed packages : 10/10 ...finished (time 00:00s) 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 00:00s) Result table with checks and their results for main contents: ------------------------------------------------------------------------------------------ |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 | ------------------------------------------------------------------------------------------ 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、开始升级 # rpm --import http://mirrors.sina.cn/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7 # redhat-upgrade-tool --network 7.0 --instrepo http://mirrors.sina.cn/centos/7/os/x86_64/ 5、升级完成 # cat /etc/redhat-release CentOS Linux release 7.0.1406 (Core)
