Differences
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rhel_to_centos [2016/08/10 12:07] Pekka Kuronen |
rhel_to_centos [2017/11/06 10:11] |
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| - | ===== How to migrate existing RedHat Enterprise Linux 6.x to a CentOS ===== | ||
| - | I am doing an expired subscription RedHat Enterprise Linux 6.5 conversion to CentOS. I am not sure if it matters that it is stuck on the 6.5 version but I will use the 6.5 CentOS Vault to do the initial conversion to reduce moving parts of the process. | ||
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| - | Doing RHEL 6.x straight to the latest CentOS (6.8) may work just fine but since I am doing this to a production server I will do it in following order: | ||
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| - | * RHEL 6.x -> CentOS 6.x | ||
| - | * CentOS 6.x -> CentOS 6.8 | ||
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| - | That way I replace RHEL with a same patchlevel CentOS which I then upgrade to the latest version. | ||
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| - | Also there is a page in the CentOS [[https://wiki.centos.org/HowTos/MigrationGuide|website]] about the subject so let's follow it with a few corrections. | ||
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| - | ==== Preparing ==== | ||
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| - | We start with old 6.x packages from the CentOS vault to get to the same patch level. | ||
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| - | RedHat / CentOS 6.5: | ||
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| - | <code> | ||
| - | mkdir upgrade; cd upgrade | ||
| - | wget 'http://vault.centos.org/6.5/os/x86_64/Packages/centos-release-6-5.el6.centos.11.1.x86_64.rpm' | ||
| - | wget 'http://vault.centos.org/6.5/os/x86_64/Packages/centos-indexhtml-6-1.el6.centos.noarch.rpm' | ||
| - | wget 'http://vault.centos.org/6.5/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm' | ||
| - | wget 'http://vault.centos.org/6.5/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm' | ||
| - | </code> | ||
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| - | RedHat / CentOS 6.6: | ||
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| - | <code> | ||
| - | mkdir upgrade; cd upgrade | ||
| - | wget 'http://vault.centos.org/6.6/os/x86_64/Packages/centos-release-6-6.el6.centos.12.2.x86_64.rpm' | ||
| - | wget 'http://vault.centos.org/6.6/os/x86_64/Packages/centos-indexhtml-6-2.el6.centos.noarch.rpm' | ||
| - | wget 'http://vault.centos.org/6.6/os/x86_64/Packages/yum-3.2.29-60.el6.centos.noarch.rpm' | ||
| - | wget 'http://vault.centos.org/6.6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm' | ||
| - | </code> | ||
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| - | RedHat / CentOS 6.7: | ||
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| - | <code> | ||
| - | mkdir upgrade; cd upgrade | ||
| - | wget 'http://vault.centos.org/6.7/os/x86_64/Packages/centos-release-6-7.el6.centos.12.3.x86_64.rpm' | ||
| - | wget 'http://vault.centos.org/6.7/os/x86_64/Packages/centos-indexhtml-6-2.el6.centos.noarch.rpm' | ||
| - | wget 'http://vault.centos.org/6.7/os/x86_64/Packages/yum-3.2.29-69.el6.centos.noarch.rpm' | ||
| - | wget 'http://vault.centos.org/6.7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm' | ||
| - | </code> | ||
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| - | RedHat / CentOS 6.8: | ||
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| - | <code> | ||
| - | mkdir upgrade; cd upgrade | ||
| - | wget 'ftp://ftp.funet.fi/pub/mirrors/centos.org/6.8/os/x86_64/Packages/centos-release-6-8.el6.centos.12.3.x86_64.rpm' | ||
| - | wget 'ftp://ftp.funet.fi/pub/mirrors/centos.org/6.8/os/x86_64/Packages/centos-indexhtml-6-2.el6.centos.noarch.rpm' | ||
| - | wget 'ftp://ftp.funet.fi/pub/mirrors/centos.org/6.8/os/x86_64/Packages/yum-3.2.29-73.el6.centos.noarch.rpm' | ||
| - | wget 'ftp://ftp.funet.fi/pub/mirrors/centos.org/6.8/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-37.el6.noarch.rpm' | ||
| - | </code> | ||
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| - | ==== Executing ==== | ||
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| - | Remove packages and clean RHN subscriptions | ||
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| - | <code> | ||
| - | yum remove rhnlib abrt-plugin-bugzilla redhat-release-notes* | ||
| - | rpm -e --nodeps redhat-indexhtml redhat-release-server-6Server | ||
| - | subscription-manager clean | ||
| - | yum remove subscription-manager | ||
| - | </code> | ||
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| - | Install CentOS equivalent packages and work our way to the latest 6.x. | ||
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| - | <code> | ||
| - | rpm -Uvh --force *.rpm | ||
| - | yum clean all | ||
| - | yum upgrade | ||
| - | </code> | ||
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| - | {(rater>id=rhel_to_centos|type=rate|trace=ip|tracedetails=0|headline=off)} | ||
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| - | ~~DISCUSSION|Leave a comment~~ | ||
