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。
yum -y update
reboot3.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。
yum -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。
rpm -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.rpm4.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。
preupg -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。
[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。
[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。
redhat-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。
redhat-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。
