Hast du darauf gewartet? Zumindest war ich es gewesen. Ich bin kein großer Fan davon, das gesamte Betriebssystem zu deinstallieren, um die neueste Version zu installieren, aber ich hatte keine Option, bis CentOS 7 veröffentlicht wurde – das bedeutet, dass CentOS 7 mit einer In-Place-Upgrade-Funktion ausgestattet ist, mit der Sie von CentOS 6 upgraden können. x auf 7, ohne das gesamte Betriebssystem zu deinstallieren/formatieren. Wie cool ist das?
Wir verwenden die offizielle Methode zum Upgrade von CentOS 6.x auf 7.
Beteiligte Schritte:
- Sie benötigen Root-Rechte
- Scannen Sie Ihr Betriebssystem mit dem Preupgrade Assistant Tool.
- CentOS 7 GPG-Schlüssel importieren
- Upgrade mit dem RedHat Upgrade Tool
Disclaimer: Although we are going to follow official upgradation method, there are chances that the upgrade might fail. There are plenty of reasons - this method is still not matured enough to handle packages that were not installed from official repositories. For instance, if you had installed packages from EPEL repository or any other third party repos, then those packages might have problems. It's advised to try upgradation procedure on a freshly installed CentOS 6.x. Follow this tutorial at your own risk and Techglimpse or the author is not responsible if the process didn't work for you.
Betriebssystem mit Preupgrade Assistant Tool scannen
Installieren Sie das „Preupgrade Assistant Tool“
- Erstellen Sie eine Repo-Datei
- $vim /etc/yum.repos.d/upgradetool.repo
- Kopieren Sie die folgenden Zeilen und fügen Sie sie in upgradetool.repo ein
[upg] name=CentOS-$releasever - Upgrade Tool baseurl=http://dev.centos.org/centos/6/upg/x86_64/ gpgcheck=1 enabled=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
- Installieren Sie das Preupgrade Assistant Tool
#yum install redhat-upgrade-tool preupgrade-assistant-contents
Mit preupg scannen
#preupg
Hinweis: Falls Sie beim Ausführen von Preupg eine Fehlermeldung erhalten, müssen Sie die Version von Python überprüfen. Klicken Sie hier, um mehr über den Fehler zu erfahren.
Das Preupgrade Assistant Tool scannt das gesamte Betriebssystem und erstellt einen Bericht über verschiedene Pakete und deren Upgrade-Status.
Beispielausgabe:
#preupg :::::::::::::::::::::::::::::::::::::::::::: |device-mapper-multipath configuration compatibility check |fixed | |Configuration Files to Review |needs_inspection | |File Lists for Manual Migration |needs_inspection | |Obsoleted rpms |needs_inspection | |Binary rebuilds |needs_inspection | |Python 2.7.5 |needs_inspection | |Check for usage of dangerous range of UID/GIDs |needs_inspection | |Packages not signed by CentOS |needs_action | |Removed rpms |needs_action | |General |needs_action | |Sonamebumped libs |needs_action | |Content for enabling and disabling services based on CentOS 6 system |needs_action | |User modification in /etc/rc.local and /etc/rc.d/rc.local |needs_action | |cgroups configuration compatibility check |needs_action | -------------------------------------------------------------------------------- ------------------------------- Tarball with results is stored here /root/preupgrade-results/preupg_results-1512 15073258.tar.gz . The latest assessment is stored in directory /root/preupgrade . Summary information: We found some potential in-place upgrade risks. 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 .
Hinweis:Lesen Sie die Ergebnisse vor dem Upgrade sorgfältig durch und verstehen Sie die Komplikationen, bevor Sie mit dem Upgrade-Prozess beginnen.
CentOS-GPG-Schlüssel importieren
#rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7
Hinweis: Vielleicht möchten Sie mehr über YUM GPG Keys erfahren .
Upgrade von CentOS 6.x auf 7 mit redhat-upgrade-tool-cli
#/usr/bin/redhat-upgrade-tool-cli --network 7 --instrepo=http://mirror.centos.org/centos/7/os/x86_64
Beispielausgabe:
:::::::::::::::::::::::::::::::::::: INPLACERISK: MEDIUM: having one of [nss elfutils-libs audit-libs gdisk libX11-common ca-certificates glusterfs kpartx openscap pixman libxcb libX11 firefox tzdata nspr elfutils-libelf openldap glusterfs-api device-mapper-multipath libnl3 mdadm glusterfs-libs nss-sysinit nss-tools spice-server device-mapper- multipath-libs netcf-libs libdrm libpciaccess audit-libs-python gtk2 audit nss-util] package installed breaks upgrade INPLACERISK: MEDIUM: a number of default configuation settings have changed in CentOS7. Users should verify that their devices are still optimally configured INPLACERISK: MEDIUM: We detected some soname bumps in the libraries installed on the system. This may break the functionality of some of your 3rd party applications. They may need rebuild. Please check their requirements. INPLACERISK: MEDIUM: We detected some .so libraries installed on the system were removed between CentOS 6 and CentOS 7. This may break the functionality of some of your 3rd party applications. ::::::::::::::::::::::::::::::::: INPLACERISK: SLIGHT: Some binaries untracked by RPM were discovered on the system and may need rebuild after upgrade. INPLACERISK: SLIGHT: Some scripts untracked by RPM were discovered on the system and may not work properly after upgrade. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/_markerlib is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/argparse-1.4.0.dist-info is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/gluster is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/ioprocess is owned by an RPM package that was not signed by CentOS. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/mom is owned by an RPM package that was not signed by CentOS. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/pip is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/pip-7.1.2.dist-info is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/pkg_resources is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/setuptools-18.3.2.dist-info is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/vdsm is owned by an RPM package that was not signed by CentOS. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/virtualenv_support is owned by an RPM package that was not signed by CentOS. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/wheel is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/wheel-0.26.0.dist-info is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/yajsonrpc is owned by an RPM package that was not signed by CentOS. INPLACERISK: SLIGHT: /usr/lib/python2.6/site-packages/zombiereaper is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib64/python2.6/site-packages/cpopen is not owned by any RPM package. INPLACERISK: SLIGHT: /usr/lib64/python2.6/site-packages/gtk-2.0 is owned by an RPM package that was not signed by CentOS. INPLACERISK: SLIGHT: /usr/lib64/python2.6/site-packages/pycrypto-2.6.1-py2.6.egg-info is not owned by any RPM package. INPLACERISK: NONE: Custom selinux configuration has been saved and it will be restored by a postupgrade script after the system upgrade. ::::::::::::::::::::::::::::::::::::::::::::::: Y ::::::::::::::::::::::::::::::::::::::::::::::::::: (651/662): xz-libs-5.1.2-12alpha.el7.i686.rpm | 107 kB 00:00 (652/662): xz-libs-5.1.2-12alpha.el7.x86_64.rpm | 102 kB 00:00 (653/662): xz-lzma-compat-5.1.2-12alpha.el7.x86_64.rpm | 18 kB 00:00 (654/662): yajl-2.0.4-4.el7.x86_64.rpm | 39 kB 00:00 (655/662): yum-3.4.3-132.el7.centos.0.1.noarch.rpm | 1.2 MB 00:01 (656/662): yum-metadata-parser-1.1.4-10.el7.x86_64.rpm | 28 kB 00:00 (657/662): yum-plugin-fastestmirror-1.1.31-34.el7.noarch | 30 kB 00:00 (658/662): yum-utils-1.1.31-34.el7.noarch.rpm | 113 kB 00:00 (659/662): zip-3.0-10.el7.x86_64.rpm | 260 kB 00:00 (660/662): zlib-1.2.7-15.el7.i686.rpm | 90 kB 00:00 (661/662): zlib-1.2.7-15.el7.x86_64.rpm | 89 kB 00:00 (662/662): zlib-devel-1.2.7-15.el7.x86_64.rpm | 50 kB 00:00 testing upgrade transaction rpm transaction 100% [=========================================================] rpm install 100% [=============================================================] setting up system for upgrade Finished. Reboot to start upgrade.
Hinweis:Der obige Schritt wird einige Zeit in Anspruch nehmen und Ihr System wird einige Male neu gestartet, um das Upgrade abzuschließen. Während des Vorgangs werden die Boot-Images abgerufen und erforderliche Pakete heruntergeladen, bevor die Installation nach dem Neustart beginnen kann.
Sie können auch das „centos-upgrade-tool“ verwenden.
Nach dem Neustart:
Starting System Upgrade... [ 28.890048] upgrade[1461]: starting upgrade hook [ 28.963833] upgrade[1461]: preparing for upgrade... [ 29.003036] upgrade[1461]: found 662 packages to install [ 29.004901] upgrade[1461]: building RPM transaction, one moment... [ 40.646364] upgrade[1461]: 662 packages to install, 461 to erase [ 40.648261] upgrade[1461]: checking RPM transaction... [ 41.609272] upgrade[1461]: non-fatal problems with RPM transaction: [ 41.659882] upgrade[1461]: libpython2.6.so.1.0()(64bit) is needed by (installed) python-cheetah-2.4.1-1.el6.x86_64 [ 41.662478] upgrade[1461]: libpython2.6.so.1.0()(64bit) is needed by (installed) python-crypto-2.0.1-22.el6.x86_64 [ 41.664632] upgrade[1461]: libpython2.6.so.1.0()(64bit) is needed by (installed) python-iwlib-0.1-1.2.el6.x86_64 [ 41.666577] upgrade[1461]: libpython2.6.so.1.0()(64bit) is needed by (installed) python-cpopen-1.4-0.el6.x86_64 :::::::::::::::::::::::::::::::::::::::
Ein weiterer Neustart und Ihr System ist nun erfolgreich auf CentOS 7 aktualisiert.