Failed solution to upgrade from CentOS 6 to CentOS 7
Operating system: CentOS6.10
This system source
# wget-O / etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
1. View the current CentOS version
[root@sky9890 sky9890] # cat / etc/redhat-release
CentOS release 6.10 (Final)
two。 Update sourc
# 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. Uninstall the newer helper that comes with 6.x and install the old version, otherwise an error will be reported.
# delete the old version first
# yum erase openscap-y
# the following cannot be connected
# 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
# both of the following connections are valid
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. Install upgrade system Assistant
# leveraging upgrade.repo sources
# yum install redhat-upgrade-tool preupgrade-assistant-contents-y
5. Detect whether it can be upgraded
# 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 finished 11... finished (time 0000s)
All changed files: 02 finished 11... finished (time 01VR 56s)
Changed config files: 03Compare 11... finished (time 00VERV 00s)
All users: 04Compare 11... finished (time 0000s)
All groups: 05Compare 11... finished (time 00VERV 00s)
RedHat signed packages: 10 take 11... finished (time 0000s)
CentOS signed packages: 11 take 11... finished (time 0000s)
.
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.
# the following errors are mainly due to the failure to use the latest openscap software package
I 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 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 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. Import key of CentOS7
# rpm-- import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7
7. Start the upgrade
# multiple system versions have been tried and cannot be upgraded.
# 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.
