CentOS 6升级到CentOS 7失败的解决办法
操作系统: CentOS6.10
本系统源
#wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
1.查看当前CentOS版本
[root@sky9890 sky9890]# cat /etc/redhat-release
CentOS release 6.10 (Final)
2.更新源
#vim /etc/yum.repos.d/upgrade.repo
[upgrade]
name=upgrade
baseurl=https://buildlogs.centos.org/centos/6/upg/x86_64/
enable=1
gpgcheck=0
3.卸载6.x自带的较新的助手，并安装老版,否则会报错。
#先删除旧版本
#yum erase openscap -y
#以下无法连接
#yum install http://dev.centos.org/centos/6/upg/x86_64/Packages/openscap-1.0.8-1.0.1.el6.centos.x86_64.rpm -y
#以下两个连接都有效
yum install ftp://ftp.pbone.net/mirror/ftp.scientificlinux.org/linux/scientific/6.5/x86_64/updates/fastbugs/openscap-1.0.8-1.el6_5.x86_64.rpm -y
yum install https://buildlogs.centos.org/centos/6/upg/x86_64/Packages/openscap-1.0.8-1.0.1.el6.centos.x86_64.rpm -y
4.安装升级系统助手
#利用到upgrade.repo源
#yum install redhat-upgrade-tool preupgrade-assistant-contents -y
5.检测是否可以升级
#preupg -s CentOS6_7
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 : 01/11 ...finished (time 00:00s)
All changed files : 02/11 ...finished (time 01:56s)
Changed config files : 03/11 ...finished (time 00:00s)
All users : 04/11 ...finished (time 00:00s)
All groups : 05/11 ...finished (time 00:00s)
RedHat signed packages : 10/11 ...finished (time 00:00s)
CentOS signed packages : 11/11 ...finished (time 00:00s)
......
Tarball with results is stored here /root/preupgrade-results/preupg_results-200304120406.tar.gz .
The latest assessment is stored in directory /root/preupgrade .
Summary information:
We found some critical issues. In-place upgrade is not advised.
Read the file /root/preupgrade/result.html for more details.
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 .
#以下的报错，主要原因是没有用最新的openscap软件包
I/O warning : failed to load external entity "/usr/share/openscap/xsl/security-guide.xsl"
compilation error: file /usr/share/preupgrade/xsl/preup.xsl line 40 element import
xsl:import : unable to load /usr/share/openscap/xsl/security-guide.xsl
I/O warning : failed to load external entity "/usr/share/openscap/xsl/oval-report.xsl"
compilation error: file /usr/share/preupgrade/xsl/preup.xsl line 41 element import
xsl:import : unable to load /usr/share/openscap/xsl/oval-report.xsl
I/O warning : failed to load external entity "/usr/share/openscap/xsl/sce-report.xsl"
compilation error: file /usr/share/preupgrade/xsl/preup.xsl line 42 element import
xsl:import : unable to load /usr/share/openscap/xsl/sce-report.xsl
OpenSCAP Error:: Could not parse XSLT file '/usr/share/preupgrade/xsl/preup.xsl' [oscapxml.c:416]
Unable to open file /root/preupgrade/result.html
Usage: preupg [options]
preupg: error: [Errno 2] No such file or directory: '/root/preupgrade/result.html'
6.导入CentOS7的key
#rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7
7.开始升级
#尝试过多个系统版本，均无法升级。
#centos-upgrade-tool-cli --network 7 --instrepo=http://vault.centos.org/centos/7.2.1511/os/x86_64/
setting up repos...
cmdline-instrepo
cmdline-instrepo/primary_db
No upgrade available for the following repos: base extras updates upgrade.treeinfo
preupgrade-assistant risk check found EXTREME risks for this upgrade.
Run preupg --riskcheck --verbose to view these risks.
Continuing with this upgrade is not recommended.
