CentOS Linux 8がCentOS Streamへシフトすることになったけど、CentOS StreamはCentOS Linuxのローリングリリース版という認識だったので、にっしーはこれといって混乱はなく。 じゃあ、既に稼働中のCentOS Linux 8をCentOS Streamに変更するにはどうすればいいのよ？と調べてみた。
結論
公式手順に従えばいいよ！
実際にやってみた
vagrantでCentOS 8の環境を用意した。
vagrant init centos/8
vagrant up
バージョン確認
[vagrant@localhost ~]$ cat /etc/redhat-release
CentOS Linux release 8.3.2011
CentOS Streamのリポジトリをインストールする。
[vagrant@localhost ~]$ sudo dnf install centos-release-stream -y
何がインストールされるかというと…
[vagrant@localhost ~]$ rpm -ql centos-release-stream
/etc/dnf/vars/stream
/etc/yum.repos.d/CentOS-Stream-AppStream.repo
/etc/yum.repos.d/CentOS-Stream-Base.repo
/etc/yum.repos.d/CentOS-Stream-Debuginfo.repo
/etc/yum.repos.d/CentOS-Stream-Extras.repo
/etc/yum.repos.d/CentOS-Stream-Media.repo
/etc/yum.repos.d/CentOS-Stream-PowerTools.repo
/etc/yum.repos.d/CentOS-Stream-Sources.repo
/etc/yum.repos.d/CentOS-Stream-Vault.repo
/etc/yum.repos.d/CentOS-Stream-centosplus.repo
EPELのリポジトリ追加するのにsudo dnf install epel-releaseするみたいなものですね。
.repoファイルを整理する
[vagrant@localhost ~]$ sudo dnf swap centos-{linux,stream}-repos
Failed to set locale, defaulting to C
Last metadata expiration check: 0:01:50 ago on Sat Dec 12 04:03:48 2020.
Dependencies resolved.
====================================================================================================
Package Arch Version Repository Size
====================================================================================================
Installing:
centos-stream-release noarch 8.4-1.el8 Stream-BaseOS 21 k
replacing centos-linux-release.noarch 8.3-1.2011.el8
replacing centos-release-stream.x86_64 8.1-1.1911.0.7.el8
centos-stream-repos noarch 8-2.el8 Stream-BaseOS 19 k
Removing:
centos-linux-repos noarch 8-2.el8 @BaseOS 26 k
Transaction Summary
====================================================================================================
Install 2 Packages
Remove 1 Package
Total download size: 40 k
Is this ok [y/N]: y
Downloading Packages:
(1/2): centos-stream-repos-8-2.el8.noarch.rpm 17 kB/s | 19 kB 00:01
(2/2): centos-stream-release-8.4-1.el8.noarch.rpm 20 kB/s | 21 kB 00:01
----------------------------------------------------------------------------------------------------
Total 16 kB/s | 40 kB 00:02
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Running scriptlet: centos-stream-repos-8-2.el8.noarch 1/1
Installing : centos-stream-repos-8-2.el8.noarch 1/5
Installing : centos-stream-release-8.4-1.el8.noarch 2/5
Obsoleting : centos-release-stream-8.1-1.1911.0.7.el8.x86_64 3/5
Obsoleting : centos-linux-release-8.3-1.2011.el8.noarch 4/5
Erasing : centos-linux-repos-8-2.el8.noarch 5/5
Running scriptlet: centos-linux-repos-8-2.el8.noarch 5/5
Verifying : centos-stream-release-8.4-1.el8.noarch 1/5
Verifying : centos-linux-release-8.3-1.2011.el8.noarch 2/5
Verifying : centos-release-stream-8.1-1.1911.0.7.el8.x86_64 3/5
Verifying : centos-stream-repos-8-2.el8.noarch 4/5
Verifying : centos-linux-repos-8-2.el8.noarch 5/5
Installed:
centos-stream-release-8.4-1.el8.noarch centos-stream-repos-8-2.el8.noarch
Removed:
centos-linux-repos-8-2.el8.noarch
Complete!
何が変わったのか、あらかじめcpしておいた.repoファイルとdiffるとこんな感じ
[vagrant@localhost ~]$ diff -ur yum.repos.old/ /etc/yum.repos.d/
Only in yum.repos.old/: CentOS-Linux-AppStream.repo
Only in yum.repos.old/: CentOS-Linux-BaseOS.repo
Only in yum.repos.old/: CentOS-Linux-ContinuousRelease.repo
Only in yum.repos.old/: CentOS-Linux-Debuginfo.repo
Only in yum.repos.old/: CentOS-Linux-Devel.repo
Only in yum.repos.old/: CentOS-Linux-Extras.repo
Only in yum.repos.old/: CentOS-Linux-FastTrack.repo
Only in yum.repos.old/: CentOS-Linux-HighAvailability.repo
Only in yum.repos.old/: CentOS-Linux-Media.repo
Only in yum.repos.old/: CentOS-Linux-Plus.repo
Only in yum.repos.old/: CentOS-Linux-PowerTools.repo
Only in yum.repos.old/: CentOS-Linux-Sources.repo
diff -ur yum.repos.old/CentOS-Stream-AppStream.repo /etc/yum.repos.d/CentOS-Stream-AppStream.repo
--- yum.repos.old/CentOS-Stream-AppStream.repo 2019-12-19 18:32:11.000000000 +0000
+++ /etc/yum.repos.d/CentOS-Stream-AppStream.repo 2020-11-10 00:32:00.000000000 +0000
@@ -1,20 +1,17 @@
-# CentOS-AppStream.repo
-#
-# The mirror system uses the connecting IP address of the client and the
-# update status of each mirror to pick mirrors that are updated to and
-# geographically close to the client. You should use this for CentOS updates
-# unless you are manually picking other mirrors.
-#
-# If the mirrorlist= does not work for you, as a fall back you can try the
-# remarked out baseurl= line instead.
+# CentOS-Stream-AppStream.repo
#
+# The mirrorlist system uses the connecting IP address of the client and the
+# update status of each mirror to pick current mirrors that are geographically
+# close to the client. You should use this for CentOS updates unless you are
+# manually picking other mirrors.
#
+# If the mirrorlist does not work for you, you can try the commented out
+# baseurl line instead.
-[Stream-AppStream]
-name=CentOS-Stream - AppStream
+[appstream]
+name=CentOS Stream $releasever - AppStream
mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=AppStream&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$stream/AppStream/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
-
Only in yum.repos.old/: CentOS-Stream-Base.repo
Only in /etc/yum.repos.d/: CentOS-Stream-BaseOS.repo
diff -ur yum.repos.old/CentOS-Stream-Debuginfo.repo /etc/yum.repos.d/CentOS-Stream-Debuginfo.repo
--- yum.repos.old/CentOS-Stream-Debuginfo.repo 2019-12-19 18:32:11.000000000 +0000
+++ /etc/yum.repos.d/CentOS-Stream-Debuginfo.repo 2020-11-10 00:32:00.000000000 +0000
@@ -1,21 +1,11 @@
-# CentOS-Debug.repo
-#
-# The mirror system uses the connecting IP address of the client and the
-# update status of each mirror to pick mirrors that are updated to and
-# geographically close to the client. You should use this for CentOS updates
-# unless you are manually picking other mirrors.
+# CentOS-Stream-Debuginfo.repo
#
+# All debug packages are merged into a single repo, split by basearch, and are
+# not signed.
-# All debug packages from all the various CentOS-8 releases
-# are merged into a single repo, split by BaseArch
-#
-# Note: packages in the debuginfo repo are currently not signed
-#
-
-[Stream-base-debuginfo]
-name=CentOS-Stream - Debuginfo
+[debuginfo]
+name=CentOS Stream $releasever - Debuginfo
baseurl=http://debuginfo.centos.org/$stream/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
-
diff -ur yum.repos.old/CentOS-Stream-Extras.repo /etc/yum.repos.d/CentOS-Stream-Extras.repo
--- yum.repos.old/CentOS-Stream-Extras.repo 2019-12-19 18:32:11.000000000 +0000
+++ /etc/yum.repos.d/CentOS-Stream-Extras.repo 2020-11-10 00:32:00.000000000 +0000
@@ -1,21 +1,17 @@
-# CentOS-Extras.repo
-#
-# The mirror system uses the connecting IP address of the client and the
-# update status of each mirror to pick mirrors that are updated to and
-# geographically close to the client. You should use this for CentOS updates
-# unless you are manually picking other mirrors.
-#
-# If the mirrorlist= does not work for you, as a fall back you can try the
-# remarked out baseurl= line instead.
+# CentOS-Stream-Extras.repo
#
+# The mirrorlist system uses the connecting IP address of the client and the
+# update status of each mirror to pick current mirrors that are geographically
+# close to the client. You should use this for CentOS updates unless you are
+# manually picking other mirrors.
#
+# If the mirrorlist does not work for you, you can try the commented out
+# baseurl line instead.
-#additional packages that may be useful
-[Stream-extras]
-name=CentOS-Stream - Extras
+[extras]
+name=CentOS Stream $releasever - Extras
mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=extras&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$stream/extras/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
-
Only in /etc/yum.repos.d/: CentOS-Stream-HighAvailability.repo
diff -ur yum.repos.old/CentOS-Stream-Media.repo /etc/yum.repos.d/CentOS-Stream-Media.repo
--- yum.repos.old/CentOS-Stream-Media.repo 2019-12-19 18:32:11.000000000 +0000
+++ /etc/yum.repos.d/CentOS-Stream-Media.repo 2020-11-10 00:32:00.000000000 +0000
@@ -1,18 +1,10 @@
-# CentOS-Media.repo
+# CentOS-Stream-Media.repo
#
-# This repo can be used with mounted DVD media, verify the mount point for
-# CentOS-8. You can use this repo and yum to install items directly off the
-# DVD ISO that we release.
-#
-# To use this repo, put in your DVD and use it with the other repos too:
-# yum --enablerepo=c8-media [command]
-#
-# or for ONLY the media repo, do this:
-#
-# yum --disablerepo=\* --enablerepo=c8-media [command]
+# You can use this repo to install items directly off the installation media.
+# Verify your mount point matches one of the below file:// paths.
-[c8-Stream-media-BaseOS]
-name=CentOS-Stream-BaseOS - Media
+[media-baseos]
+name=CentOS Stream $releasever - Media - BaseOS
baseurl=file:///media/CentOS/BaseOS
file:///media/cdrom/BaseOS
file:///media/cdrecorder/BaseOS
@@ -20,8 +12,8 @@
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
-[c8-Stream-media-AppStream]
-name=CentOS-Stream-AppStream - Media
+[media-appstream]
+name=CentOS Stream $releasever - Media - AppStream
baseurl=file:///media/CentOS/AppStream
file:///media/cdrom/AppStream
file:///media/cdrecorder/AppStream
diff -ur yum.repos.old/CentOS-Stream-PowerTools.repo /etc/yum.repos.d/CentOS-Stream-PowerTools.repo
--- yum.repos.old/CentOS-Stream-PowerTools.repo 2019-12-19 18:32:11.000000000 +0000
+++ /etc/yum.repos.d/CentOS-Stream-PowerTools.repo 2020-11-10 00:32:00.000000000 +0000
@@ -1,20 +1,17 @@
-# CentOS-PowerTools.repo
-#
-# The mirror system uses the connecting IP address of the client and the
-# update status of each mirror to pick mirrors that are updated to and
-# geographically close to the client. You should use this for CentOS updates
-# unless you are manually picking other mirrors.
-#
-# If the mirrorlist= does not work for you, as a fall back you can try the
-# remarked out baseurl= line instead.
+# CentOS-Stream-PowerTools.repo
#
+# The mirrorlist system uses the connecting IP address of the client and the
+# update status of each mirror to pick current mirrors that are geographically
+# close to the client. You should use this for CentOS updates unless you are
+# manually picking other mirrors.
#
+# If the mirrorlist does not work for you, you can try the commented out
+# baseurl line instead.
-[Stream-PowerTools]
-name=CentOS-Stream - PowerTools
+[powertools]
+name=CentOS Stream $releasever - PowerTools
mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=PowerTools&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$stream/PowerTools/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
-
Only in /etc/yum.repos.d/: CentOS-Stream-RealTime.repo
Only in yum.repos.old/: CentOS-Stream-Sources.repo
Only in yum.repos.old/: CentOS-Stream-Vault.repo
Only in yum.repos.old/: CentOS-Stream-centosplus.repo
リポジトリがCentOS Streamを向いたのでdistro-syncする。
[vagrant@localhost ~]$ sudo dnf distro-sync -y
無事CentOS Streamに変わりました。
[vagrant@localhost ~]$ cat /etc/redhat-release
CentOS Stream release 8
以降はsudo dnf upgradeしていけば良さそう。