Stavi aspettando questo? Almeno, lo ero stato. Non sono un grande fan della disinstallazione dell'intero sistema operativo per installare l'ultima versione, ma non avevo alcuna opzione fino al rilascio di CentOS 7:significa che CentOS 7 viene fornito con una funzione di aggiornamento sul posto che ti consente di eseguire l'aggiornamento da CentOS 6. da x a 7 senza disinstallare/formattare l'intero sistema operativo. Quanto è bello?
Utilizzeremo il metodo ufficiale per eseguire l'aggiornamento da CentOS 6.x a 7.
Passaggi coinvolti:
- Devi avere i privilegi di "root"
- Scansiona il tuo sistema operativo con Preupgrade Assistant Tool.
- Importa chiave GPG CentOS 7
- Aggiorna utilizzando lo strumento di aggiornamento RedHat
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.
Scansione del sistema operativo utilizzando lo strumento Assistente per il preupgrade
Installa "Strumento assistente per il preupgrade"
- Crea un file repository
- $vim /etc/yum.repos.d/upgradetool.repo
- Copia e incolla le righe seguenti in upgradetool.repo
[upg] name=CentOS-$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
- Installa lo strumento Assistente per il preaggiornamento
#yum install redhat-upgrade-tool preupgrade-assistant-contents
Scansiona usando il preupg
#preupg
Nota : Nel caso in cui ricevi un errore durante l'esecuzione di preupg, devi controllare la versione di Python. Fare clic qui per ulteriori informazioni sull'errore.
Preupgrade Assistant Tool eseguirà la scansione dell'intero sistema operativo e creerà un rapporto sui vari pacchetti e sul relativo stato di aggiornamento.
Esempio di output:
#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 .
Nota:leggi attentamente i risultati del pre-aggiornamento e comprendi le complicazioni prima di avviare il processo di aggiornamento.
Importa chiavi GPG CentOS
#rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7
Nota: Potresti voler ulteriori informazioni sulle chiavi GPG YUM .
Aggiorna da CentOS 6.x a 7 usando redhat-upgrade-tool-cli
#/usr/bin/redhat-upgrade-tool-cli --network 7 --instrepo=http://mirror.centos.org/centos/7/os/x86_64
Esempio di output:
:::::::::::::::::::::::::::::::::::: 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.
Nota:il passaggio precedente richiederà del tempo e il sistema si riavvierà un paio di volte per completare l'aggiornamento. Durante il processo, le immagini di avvio vengono recuperate e i pacchetti necessari vengono scaricati prima che l'installazione possa iniziare dopo il riavvio.
Puoi anche utilizzare "centos-upgrade-tool".
Dopo il riavvio:
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 :::::::::::::::::::::::::::::::::::::::
Un altro riavvio e il tuo sistema è ora aggiornato correttamente a CentOS 7.