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Обновление CentOS с 6 на 7 версию

Обновление текущей CentOS 6

Перед тем, как начать - проверьте чтобы были установлены все последние обновления, это поможет избежать проблем в дальнейшем.

yum -y update

Проверяем текущую версию системы

Обвноление до 7 версии возможно с версии CentOS 6.5 и CentOS 6.6.
Если версия вашей системы ниже представленных, то рекомендую обновить её до последней в своей ветке.

# cat /etc/redhat-release
CentOS release 6.6 (Final)

Установка дополнительных пакетов и инструментов обновления

yum -y install openscap pcre-devel libxml2-devel libxslt-devel m2crypto python-simplejson mod_wsgi

Начиная с 7 версии RHEL обновление возможно с помощью утилиты redhat-upgrade-tool.
Для установки утилиты есть два пути: быстрый - подключение репозитория, и более долгий со скачиванием и установкой каждого пакета.

Для второго пути

Необходимо скачать требующиеся файлы http://dev.centos.org/centos/6/upg/x86_64/Packages/

Далее пакеты, которые вам понадобятся

  • preupgrade-assistant
  • preupgrade-assistant-contents
  • preupgrade-assistant-ui
  • redhat-upgrade-tool

Для скачивания и установки переходим в директорию /etc/и загружаем пакеты

cd /etc
wget http://dev.centos.org/centos/6/upg/x86_64/Packages/preupgrade-assistant-1.0.2-33.0.3.el6.centos.x86_64.rpm http://dev.centos.org/centos/6/upg/x86_64/Packages/preupgrade-assistant-contents-0.5.13-1.0.5.el6.centos.noarch.rpm http://dev.centos.org/centos/6/upg/x86_64/Packages/preupgrade-assistant-ui-1.0.2-33.0.3.el6.centos.x86_64.rpm http://dev.centos.org/centos/6/upg/x86_64/Packages/redhat-upgrade-tool-0.7.22-3.el6.centos.noarch.rpm
yum localinstall preupgrade-assistant-*

Для первого (более быстрого) пути

Создаем новый файл репозитория со следующим содержанием

nano /etc/yum.repos.d/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

И производим их установку

yum -y install redhat-upgrade-tool preupgrade-assistant-contents

Запуск прединсталляционного помощника

Запуск прединсталляционного помощника не выполняет никаких модернизаций, но будет проверять потенциальные проблемы, которые могут произойти после перехода с 6 на 7 версию CentOS

preupg

Утилита дополнительно спросит вас, хотим ли продолжить - отвечаем “yes”

[root@bogachev ~]# preupg
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

Результат работы данной команды на моей системе

Gathering logs used by preupgrade assistant:
All installed packages : 01/11 ...finished (time 00:00s)
All changed files      : 02/11 ...finished (time 00:37s)
Changed config files   : 03/11 ...finished (time 00:00s)
All users              : 04/11 ...finished (time 00:00s)
All groups             : 05/11 ...finished (time 00:00s)
Service statuses       : 06/11 ...finished (time 00:00s)
All installed files    : 07/11 ...finished (time 00:01s)
All local files        : 08/11 ...finished (time 00:01s)
All executable files   : 09/11 ...finished (time 00:00s)
RedHat signed packages : 10/11 ...finished (time 00:00s)
CentOS signed packages : 11/11 ...finished (time 00:00s)
Assessment of the system, running checks / SCE scripts:
001/096 ...done    (Configuration Files to Review)
002/096 ...done    (File Lists for Manual Migration)
003/096 ...done    (Bacula Backup Software)
004/096 ...done    (MySQL configuration)
005/096 ...done    (Migration of the MySQL data stack)
006/096 ...done    (Changes related to moving from MySQL to MariaDB)
007/096 ...done    (PostgreSQL upgrade content)
008/096 ...done    (GNOME Desktop Environment underwent several design modifications in CentOS 7 release)
009/096 ...done    (KDE Desktop Environment underwent several design modifications in CentOS 7 release)
010/096 ...done    (several graphic drivers not supported in CentOS 7)
011/096 ...done    (several input drivers not supported in CentOS 7)
012/096 ...done    (several kernel networking drivers not available in CentOS 7)
013/096 ...done    (several kernel storage drivers not available in CentOS 7)
014/096 ...done    (Names, Options and Output Format Changes in arptables)
015/096 ...done    (BIND9 running in a chroot environment check.)
016/096 ...done    (BIND9 configuration compatibility check)
017/096 ...done    (Move dhcpd/dhcprelay arguments from /etc/sysconfig/* to *.service files)
018/096 ...done    (DNSMASQ configuration compatibility check)
019/096 ...done    (Dovecot configuration compatibility check)
020/096 ...done    (Compatibility Between iptables and ip6tables)
021/096 ...done    (Net-SNMP check)
022/096 ...done    (Squid configuration compatibility check)
023/096 ...done    (Reusable Configuration Files)
024/096 ...done    (VCS repositories)
025/096 ...done    (Added and extended options for BIND9 configuration)
026/096 ...done    (Added options in DNSMASQ configuration)
027/096 ...done    (Packages not signed by CentOS)
028/096 ...done    (Obsoleted rpms)
029/096 ...done    (w3m not available in CentOS 7)
030/096 ...done    (report incompatibilities between CentOS 6 and 7 in qemu-guest-agent package)
031/096 ...done    (Removed options in coreutils binaries)
032/096 ...done    (Removed options in gawk binaries)
033/096 ...done    (Removed options in netstat binary)
034/096 ...done    (Removed options in quota tools)
035/096 ...done    (Removed rpms)
036/096 ...done    (Replaced rpms)
037/096 ...done    (GMP library incompatibilities)
038/096 ...done    (package downgrades)
039/096 ...done    (restore custom selinux configuration)
040/096 ...done    (General)
041/096 ...done    (samba shared directories selinux)
042/096 ...done    (CUPS Browsing/BrowsePoll configuration)
043/096 ...done    (CVS Package Split)
044/096 ...done    (FreeRADIUS Upgrade Verification)
045/096 ...done    (httpd configuration compatibility check)
046/096 ...done    (bind-dyndb-ldap)
047/096 ...done    (Identity Management Server compatibility check)
048/096 ...done    (IPA Server CA Verification)
049/096 ...done    (NTP configuration)
050/096 ...done    (Information on time-sync.target)
051/096 ...done    (OpenLDAP /etc/sysconfig and data compatibility)
052/096 ...done    (OpenSSH sshd_config migration content)
053/096 ...done    (OpenSSH sysconfig migration content)
054/096 ...done    (Configuration for quota_nld service)
055/096 ...done    (Disk quota netlink message daemon moved into quota-nld package)
056/096 ...done    (SSSD compatibility check)
057/096 ...done    (Luks encrypted partition)
058/096 ...done    (Clvmd and cmirrord daemon management.)
059/096 ...done    (State of LVM2 services.)
060/096 ...done    (device-mapper-multipath configuration compatibility check)
061/096 ...done    (Removal of scsi-target-utils)
062/096 ...done    (Configuration for warnquota tool)
063/096 ...done    (Disk quota tool warnquota moved into quota-warnquota package)
064/096 ...done    (Architecture Support)
065/096 ...done    (Binary rebuilds)
066/096 ...done    (Debuginfo packages)
067/096 ...done    (Cluster and High Availability)
068/096 ...done    (Quorum implementation)
069/096 ...done    (fix krb5kdc config file)
070/096 ...done    (File Systems, Partitions and Mounts Configuration Review)
071/096 ...done    (Read Only FHS directories)
072/096 ...done    (Sonamebumped libs)
073/096 ...done    (SonameKept Reusable Dynamic Libraries)
074/096 ...done    (Removed .so libs)
075/096 ...done    (In-place Upgrade Requirements for the /usr/ Directory)
076/096 ...done    (CA certificate bundles modified)
077/096 ...done    (Developer Tool Set packages)
078/096 ...done    (Hyper-V)
079/096 ...done    (Content for enabling and disabling services based on CentOS 6 system)
080/096 ...done    (Check for ethernet interface naming)
081/096 ...done    (User modification in /etc/rc.local and /etc/rc.d/rc.local)
082/096 ...done    (cgroups configuration compatibility check)
083/096 ...done    (Plugable authentication modules (PAM))
084/096 ...done    (Foreign Perl modules)
085/096 ...done    (Python 2.7.5)
086/096 ...done    (Ruby 2.0.0)
087/096 ...done    (SCL collections)
088/096 ...done    (System kickstart)
089/096 ...done    (YUM)
090/096 ...done    (Check for usage of dangerous range of UID/GIDs)
091/096 ...done    (Incorrect usage of reserved UID/GIDs)
092/096 ...done    (NIS ypbind config files back-up)
093/096 ...done    (NIS Makefile back-up)
094/096 ...done    (NIS server maps check)
095/096 ...done    (NIS server MAXUID and MAXGID limits check)
096/096 ...done    (NIS server config file back-up)
Assessment finished (time 02:43s)
Result table with checks and their results for main contents:
---------------------------------------------------------------------------------------------------------------
|Bacula Backup Software                                                                    |notapplicable     |
|MySQL configuration                                                                       |notapplicable     |
|Migration of the MySQL data stack                                                         |notapplicable     |
|Changes related to moving from MySQL to MariaDB                                           |notapplicable     |
|PostgreSQL upgrade content                                                                |notapplicable     |
|GNOME Desktop Environment underwent several design modifications in CentOS 7 release      |notapplicable     |
|KDE Desktop Environment underwent several design modifications in CentOS 7 release        |notapplicable     |
|several graphic drivers not supported in CentOS 7                                         |notapplicable     |
|several input drivers not supported in CentOS 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     |
|Net-SNMP check                                                                            |notapplicable     |
|Squid configuration compatibility check                                                   |notapplicable     |
|Added and extended options for BIND9 configuration                                        |notapplicable     |
|Added options in DNSMASQ configuration                                                    |notapplicable     |
|w3m not available in CentOS 7                                                             |notapplicable     |
|report incompatibilities between CentOS 6 and 7 in qemu-guest-agent package               |notapplicable     |
|Removed options in quota tools                                                            |notapplicable     |
|restore custom selinux configuration                                                      |notapplicable     |
|samba shared directories selinux                                                          |notapplicable     |
|CUPS Browsing/BrowsePoll configuration                                                    |notapplicable     |
|CVS Package Split                                                                         |notapplicable     |
|FreeRADIUS Upgrade Verification                                                           |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     |
|Configuration for quota_nld service                                                       |notapplicable     |
|Disk quota netlink message daemon moved into quota-nld package                            |notapplicable     |
|SSSD compatibility check                                                                  |notapplicable     |
|Clvmd and cmirrord daemon management.                                                     |notapplicable     |
|Removal of scsi-target-utils                                                              |notapplicable     |
|Configuration for warnquota tool                                                          |notapplicable     |
|Disk quota tool warnquota moved into quota-warnquota package                              |notapplicable     |
|Quorum implementation                                                                     |notapplicable     |
|fix krb5kdc config file                                                                   |notapplicable     |
|cgroups configuration compatibility check                                                 |notapplicable     |
|Ruby 2.0.0                                                                                |notapplicable     |
|SCL collections                                                                           |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     |
|several kernel networking drivers not available in CentOS 7                               |pass              |
|several kernel storage drivers not available in CentOS 7                                  |pass              |
|Compatibility Between iptables and ip6tables                                              |pass              |
|Reusable Configuration Files                                                              |pass              |
|OpenSSH sshd_config migration content                                                     |pass              |
|Luks encrypted partition                                                                  |pass              |
|Architecture Support                                                                      |pass              |
|Debuginfo packages                                                                        |pass              |
|Cluster and High Availability                                                             |pass              |
|Read Only FHS directories                                                                 |pass              |
|In-place Upgrade Requirements for the /usr/ Directory                                     |pass              |
|CA certificate bundles modified                                                           |pass              |
|Developer Tool Set packages                                                               |pass              |
|Hyper-V                                                                                   |pass              |
|Check for ethernet interface naming                                                       |pass              |
|User modification in /etc/rc.local and /etc/rc.d/rc.local                                 |pass              |
|Plugable authentication modules (PAM)                                                     |pass              |
|Python 2.7.5                                                                              |pass              |
|System kickstart                                                                          |pass              |
|Check for usage of dangerous range of UID/GIDs                                            |pass              |
|Incorrect usage of reserved UID/GIDs                                                      |pass              |
|VCS repositories                                                                          |informational     |
|Removed options in coreutils binaries                                                     |informational     |
|Removed options in gawk binaries                                                          |informational     |
|Removed options in netstat binary                                                         |informational     |
|GMP library incompatibilities                                                             |informational     |
|httpd configuration compatibility check                                                   |informational     |
|File Systems, Partitions and Mounts Configuration Review                                  |informational     |
|Sonamebumped libs                                                                         |informational     |
|SonameKept Reusable Dynamic Libraries                                                     |informational     |
|Removed .so libs                                                                          |informational     |
|Foreign Perl modules                                                                      |informational     |
|YUM                                                                                       |informational     |
|Replaced rpms                                                                             |fixed             |
|package downgrades                                                                        |fixed             |
|OpenSSH sysconfig migration content                                                       |fixed             |
|State of LVM2 services.                                                                   |fixed             |
|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  |
|Packages not signed by CentOS                                                             |needs_action      |
|Removed rpms                                                                              |needs_action      |
|General                                                                                   |needs_action      |
|Content for enabling and disabling services based on CentOS 6 system                      |needs_action      |
---------------------------------------------------------------------------------------------------------------
Tarball with results is stored here /root/preupgrade-results/preupg_results-150318105406.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 .

После завершения работы утилиты - получим результат с кодом выхода, далее представлено их значение.

PASS: Все в порядке;
FAIL: Что-то пошло не так, возможно будут проблемы с совместимостью;
FIXED: Обнаружена несовместимость, но есть решение исправить запуском postupgrade.dскриптов, после обновления;
INFORMATIONAL: Информация для администраторов;
NOT_APPLICABLE: Некоторые пакеты не установлены в вашей системе, но будут проверены;
ERROR: Означает, что есть ошибки в рамках самой утилиты (не стоит об этом беспокоиться);

Обновление с CentOS 6 на 7

После проверки прединсталляционной утилитой мы готовы приступить к обновлению.

Добавляем ключ

rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7

И в завершении запускаем команду

centos-upgrade-tool-cli --network 7 --instrepo=http://mirror.centos.org/centos/7/os/x86_64/

Вы можете выбрать другое зеркало

После завершения процесса обновления, утилита попросит перезагрузить систему для завершения установки.

...
INPLACERISK: SLIGHT: We detected some files untracked by rpms. Some of these may need manual check/migration after redhat-upgrade-tool and/or can cause conflicts or troubles during the installation. Try to reduce unnecessary untracked files before running redhat-upgrade-tool.
INPLACERISK: SLIGHT: We detected some packages installed on the system changed their name between CentOS 6 and CentOS 7. Although they should be compatible, monitoring after the update is recommended.
INPLACERISK: SLIGHT: export shell commands will be deleted from /etc/sysconfig/sshd
INPLACERISK: SLIGHT: Some scripts untracked by RPM were discovered on the system and may not work properly after upgrade.
Continue with the upgrade [Y/N]? Y

Перезагружаем систему

reboot

После перезагрузки проверяем версию системы

# cat /etc/redhat-release
CentOS Linux release 7.0.1406 (Core)

Обновление завершено!

 

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