昨日、CentOS 7のインストールをしてみたので、今回は既存のCentOS 6.5をCentOS 7にアップグレードしてみることにした。
どうやら、CentOS 6.5から7へのアップグレードは正式にサポートされるようになったらしい。
アップグレードには、以下のパッケージが必要なようだ。
- preupgrade-assistant
- preupgrade-assistant-contents
- preupgrade-assistant-ui
- python-rhsm
- redhat-upgrade-tool
これらのパッケージは、こちらのページから取得できるようだ。
それではアップグレードを始めてみよう。
1.現在のバージョン確認
まずは、現在のCentOSのバージョンを確認する。バージョンは、CentOS 6.5である必要がある。6.4だとダメらしいので注意。
2.アップデートの適用
アップグレードを行う前に、CentOS 6.5のアップデート適用を行う。
以下のコマンドを実行し再起動する。
bashyum -y update reboot
3.アップグレード用のパッケージを取得
アップグレードを行うためのパッケージ(preupg等)を取得する。
まずは、依存関係の有るライブラリ等をインストールする。
bashyum -y install openscap pcre-devel libxml2-devel libxslt-devel yum -y install m2crypto python-simplejson
上記インストール後、アップグレード用パッケージをインストールする。
bashrpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/preupgrade-assistant-1.0.2-33.el6.x86_64.rpm rpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/preupgrade-assistant-contents-0.5.13-1.el6.noarch.rpm rpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/preupgrade-assistant-ui-1.0.2-33.el6.x86_64.rpm rpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/python-rhsm-1.9.7-1.el6.x86_64.rpm rpm -ihv http://dev.centos.org/centos/6/upg/x86_64/Packages/redhat-upgrade-tool-0.7.22-1.el6.noarch.rpm
4.アップグレードコマンドの実行
さて、必要なパッケージは全て揃ったようなので、実際にアップグレードコマンドを実行する。
アップグレードは、以下のコマンドで行う。
bashpreupg -s RHEL6_7
実行すると、本当にアップグレードしていいか確認されるので、「y」を入力する。
shell[root@localhost ~]# preupg -s RHEL6_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
実際に実行した結果がこちら。
shell[root@localhost ~]# preupg -s RHEL6_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 : 01/10 ...finished (time 00:01s) All changed files : 02/10 ...finished (time 05:19s) 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 00:01s) All installed files : 07/10 ...finished (time 00:05s) All local files : 08/10 ...finished (time 00:26s) All executable files : 09/10 ...finished (time 00:01s) 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) 008/100 ...done (GNOME Desktop Environment underwent several design modifications in Red Hat Enterprise Linux 7 release) 009/100 ...done (KDE Desktop Environment underwent several design modifications in Red Hat Enterprise Linux 7 release) 010/100 ...done (several graphic drivers not supported in Red Hat Enterprise Linux 7) 011/100 ...done (several input drivers not supported in Red Hat Enterprise Linux 7) 012/100 ...done (several kernel networking drivers not available in Red Hat Enterprise Linux 7) 013/100 ...done (several kernel storage drivers not available in Red Hat Enterprise Linux 7) 014/100 ...done (Names, Options and Output Format Changes in arptables) 015/100 ...done (BIND9 running in a chroot environment check.) 016/100 ...done (BIND9 configuration compatibility check) 017/100 ...done (Move dhcpd/dhcprelay arguments from /etc/sysconfig/* to *.service files) 018/100 ...done (DNSMASQ configuration compatibility check) 019/100 ...done (Dovecot configuration compatibility check) 020/100 ...done (Compatibility Between iptables and ip6tables) 021/100 ...done (Net-SNMP check) 022/100 ...done (Squid configuration compatibility check) 023/100 ...done (Reusable Configuration Files) 024/100 ...done (VCS repositories) 025/100 ...done (Added and extended options for BIND9 configuration) 026/100 ...done (Added options in DNSMASQ configuration) 027/100 ...done (Packages not signed by Red Hat) 028/100 ...done (Obsoleted rpms) 029/100 ...done (w3m not available in Red Hat Enterprise Linux 7) 030/100 ...done (report incompatibilities between Red Hat Enterprise Linux 6 and 7 in qemu-guest-agent package) 031/100 ...done (Removed options in coreutils binaries) 032/100 ...done (Removed options in gawk binaries) 033/100 ...done (Removed options in netstat binary) 034/100 ...done (Removed options in quota tools) 035/100 ...done (Removed rpms) 036/100 ...done (Replaced rpms) 037/100 ...done (GMP library incompatibilities) 038/100 ...done (optional channel problems) 039/100 ...done (package downgrades) 040/100 ...done (restore custom selinux configuration) 041/100 ...done (General) 042/100 ...done (samba shared directories selinux) 043/100 ...done (CUPS Browsing/BrowsePoll configuration) 044/100 ...done (CVS Package Split) 045/100 ...done (FreeRADIUS Upgrade Verification) 046/100 ...done (httpd configuration compatibility check) 047/100 ...done (bind-dyndb-ldap) 048/100 ...done (Identity Management Server compatibility check) 049/100 ...done (IPA Server CA Verification) 050/100 ...done (NTP configuration) 051/100 ...done (Information on time-sync.target) 052/100 ...done (OpenLDAP /etc/sysconfig and data compatibility) 053/100 ...done (OpenSSH sshd_config migration content) 054/100 ...done (OpenSSH sysconfig migration content) 055/100 ...done (Configuration for quota_nld service) 056/100 ...done (Disk quota netlink message daemon moved into quota-nld package) 057/100 ...done (SSSD compatibility check) 058/100 ...done (Luks encrypted partition) 059/100 ...done (Clvmd and cmirrord daemon management.) 060/100 ...done (State of LVM2 services.) 061/100 ...done (device-mapper-multipath configuration compatibility check) 062/100 ...done (Removal of scsi-target-utils) 063/100 ...done (Configuration for warnquota tool) 064/100 ...done (Disk quota tool warnquota moved into quota-warnquota package) 065/100 ...done (Check for Add-On availability) 066/100 ...done (Architecture Support) 067/100 ...done (Binary rebuilds) 068/100 ...done (Debuginfo packages) 069/100 ...done (Cluster and High Availablility) 070/100 ...done (fix krb5kdc config file) 071/100 ...done (File Systems, Partitions and Mounts Configuration Review) 072/100 ...done (Read Only FHS directories) 073/100 ...done (Red Hat Enterprise Linux Server variant) 074/100 ...done (Sonamebumped libs) 075/100 ...done (SonameKept Reusable Dynamic Libraries) 076/100 ...done (Removed .so libs) 077/100 ...done (In-place Upgrade Requirements for the /usr/ Directory) 078/100 ...done (CA certificate bundles modified) 079/100 ...done (Developer Tool Set packages) 080/100 ...done (Hyper-V) 081/100 ...done (Content for enabling and disabling services based on RHEL 6 system) 082/100 ...done (Check for ethernet interface naming) 083/100 ...done (User modification in /etc/rc.local and /etc/rc.d/rc.local) 084/100 ...done (cgroups configuration compatibility check) 085/100 ...done (Plugable authentication modules (PAM)) 086/100 ...done (Foreign Perl modules) 087/100 ...done (Python 2.7.5) 088/100 ...done (Ruby 2.0.0) 089/100 ...done (SCL collections) 090/100 ...done (Red Hat Subscription Manager) 091/100 ...done (Red Hat Network Classic Unsupported) 092/100 ...done (System kickstart) 093/100 ...done (YUM) 094/100 ...done (Check for usage of dangerous range of UID/GIDs) 095/100 ...done (Incorrect usage of reserved UID/GIDs) 096/100 ...done (NIS ypbind config files back-up) 097/100 ...done (NIS Makefile back-up) 098/100 ...done (NIS server maps check) 099/100 ...done (NIS server MAXUID and MAXGID limits check) 100/100 ...done (NIS server config file back-up) Assessment finished (time 00:02s) Result table with checks and their results for main contents: ------------------------------------------------------------------------------------------------------------------------------ |Configuration Files to Review |notapplicable | |File Lists for Manual Migration |notapplicable | |Bacula Backup Software |notapplicable | |MySQL configuration |notapplicable | |Migration of the MySQL data stack |notapplicable | |General changes in default MySQL implementation |notapplicable | |PostgreSQL upgrade content |notapplicable | |GNOME Desktop Environment underwent several design modifications in Red Hat Enterprise Linux 7 release |notapplicable | |KDE Desktop Environment underwent several design modifications in Red Hat Enterprise Linux 7 release |notapplicable | |several graphic drivers not supported in Red Hat Enterprise Linux 7 |notapplicable | |several input drivers not supported in Red Hat Enterprise Linux 7 |notapplicable | |several kernel networking drivers not available in Red Hat Enterprise Linux 7 |notapplicable | |several kernel storage drivers not available in Red Hat Enterprise Linux 7 |notapplicable | |Names, Options and Output Format Changes in arptables |notapplicable | |BIND9 running in a chroot environment check. |notapplicable | |BIND9 configuration compatibility check |notapplicable | |Move dhcpd/dhcprelay arguments from /etc/sysconfig/* to *.service files |notapplicable | |DNSMASQ configuration compatibility check |notapplicable | |Dovecot configuration compatibility check |notapplicable | |Compatibility Between iptables and ip6tables |notapplicable | |Net-SNMP check |notapplicable | |Squid configuration compatibility check |notapplicable | |Reusable Configuration Files |notapplicable | |VCS repositories |notapplicable | |Added and extended options for BIND9 configuration |notapplicable | |Added options in DNSMASQ configuration |notapplicable | |Packages not signed by Red Hat |notapplicable | |Obsoleted rpms |notapplicable | |w3m not available in Red Hat Enterprise Linux 7 |notapplicable | |report incompatibilities between Red Hat Enterprise Linux 6 and 7 in qemu-guest-agent package |notapplicable | |Removed options in coreutils binaries |notapplicable | |Removed options in gawk binaries |notapplicable | |Removed options in netstat binary |notapplicable | |Removed options in quota tools |notapplicable | |Removed rpms |notapplicable | |Replaced rpms |notapplicable | |GMP library incompatibilities |notapplicable | |optional channel problems |notapplicable | |package downgrades |notapplicable | |restore custom selinux configuration |notapplicable | |General |notapplicable | |samba shared directories selinux |notapplicable | |CUPS Browsing/BrowsePoll configuration |notapplicable | |CVS Package Split |notapplicable | |FreeRADIUS Upgrade Verification |notapplicable | |httpd configuration compatibility check |notapplicable | |bind-dyndb-ldap |notapplicable | |Identity Management Server compatibility check |notapplicable | |IPA Server CA Verification |notapplicable | |NTP configuration |notapplicable | |Information on time-sync.target |notapplicable | |OpenLDAP /etc/sysconfig and data compatibility |notapplicable | |OpenSSH sshd_config migration content |notapplicable | |OpenSSH sysconfig migration content |notapplicable | |Configuration for quota_nld service |notapplicable | |Disk quota netlink message daemon moved into quota-nld package |notapplicable | |SSSD compatibility check |notapplicable | |Luks encrypted partition |notapplicable | |Clvmd and cmirrord daemon management. |notapplicable | |State of LVM2 services. |notapplicable | |device-mapper-multipath configuration compatibility check |notapplicable | |Removal of scsi-target-utils |notapplicable | |Configuration for warnquota tool |notapplicable | |Disk quota tool warnquota moved into quota-warnquota package |notapplicable | |Check for Add-On availability |notapplicable | |Architecture Support |notapplicable | |Binary rebuilds |notapplicable | |Debuginfo packages |notapplicable | |Cluster and High Availablility |notapplicable | |fix krb5kdc config file |notapplicable | |File Systems, Partitions and Mounts Configuration Review |notapplicable | |Read Only FHS directories |notapplicable | |Red Hat Enterprise Linux Server variant |notapplicable | |Sonamebumped libs |notapplicable | |SonameKept Reusable Dynamic Libraries |notapplicable | |Removed .so libs |notapplicable | |In-place Upgrade Requirements for the /usr/ Directory |notapplicable | |CA certificate bundles modified |notapplicable | |Developer Tool Set packages |notapplicable | |Hyper-V |notapplicable | |Content for enabling and disabling services based on RHEL 6 system |notapplicable | |Check for ethernet interface naming |notapplicable | |User modification in /etc/rc.local and /etc/rc.d/rc.local |notapplicable | |cgroups configuration compatibility check |notapplicable | |Plugable authentication modules (PAM) |notapplicable | |Foreign Perl modules |notapplicable | |Python 2.7.5 |notapplicable | |Ruby 2.0.0 |notapplicable | |SCL collections |notapplicable | |Red Hat Network Classic Unsupported |notapplicable | |Red Hat Subscription Manager |notapplicable | |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-140709010913.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 . [root@localhost ~]#
で、実はこれで終わりではない。
また、以下のコマンドを実行する。
bashredhat-upgrade-tool-cli --network 7.0 --instrepo http://mirror.centos.org/centos/7/os/x86_64/
上記でうまくいかない場合は、以下のように「--force」オプションを付与する。
bashredhat-upgrade-tool-cli --network 7.0 --instrepo http://mirror.centos.org/centos/7/os/x86_64/ --force
上記処理が完了後、rebootコマンドで再起動するとアップグレードが開始される。
再起動後、「/etc/redhat-release」の値が「CentOS Linux release 7.0.1406 (Core)」（2014/7/9現在）になっていればアップグレード完了。
まだちゃんと検証し切ってないので、やる場合は自己責任でお願いします。
