CentOS 8システムの正しいリポジトリを入手してください。

非常に基本的な質問であれば申し訳ありません。しかし、私はyum / dnfについて詳しく知りません。

履歴：アップデートが停止したときにCentos 7を実行しているサーバーを再構築しました。私は私が構築していることにあまり興味を持っておらず、ネットワークインストールをダウンロードして必要なすべてをロードするために使用しました。

アップデートが発生していないことを確認し、基本リリースでアップデートストリームが欠落していることを示唆していることを発見しました。指示に従って追加し、利用可能な更新がたくさんあります。

また、完全なDVDイメージからラップトップに仮想マシンをロードしました。

現在：私のサーバーにアップデートが表示されません。お久しぶりです。奇妙なようです。また、8.0のように見え、VMのバージョンは8.2であり、アップデートがあります。

リポジトリを一覧表示すると少し異なります。

仕える人:

# yum repolist enabled
repo id                                               repo name
appstream                                             CentOS Stream 8 - AppStream
baseos                                                CentOS Stream 8 - BaseOS
epel                                                  Extra Packages for Enterprise Linux 8 - x86_64
epel-modular                                          Extra Packages for Enterprise Linux Modular 8 - x86_64
extras                                                CentOS Stream 8 - Extras

仮想デバイス：

# yum repolist
repo id                                                   repo name
AppStream                                                 CentOS-8 - AppStream
BaseOS                                                    CentOS-8 - Base
extras                                                    CentOS-8 - Extras
google-chrome                                             google-chrome

仮想マシンはepelリポジトリを必要としないので重要ではありません。しかし、デフォルトのストレージのリストは異なります...

自分のサーバーに適したリポジトリをインストールする方法を教えてくれる人はいますか？ ？ ？ （再構築はオプションではありません。アップグレード後にすべてを正常に戻すには長い時間がかかります。）

更新しようとすると、次の内容が引き続き表示されます。

# dnf update
Last metadata expiration check: 2:20:32 ago on Sun 29 Nov 2020 11:18:48 AM PST.
Dependencies resolved.
Nothing to do.
Complete!

ログ出力：

2020-11-29T21:39:19Z DDEBUG Command: dnf update 
2020-11-29T21:39:19Z DDEBUG Installroot: /
2020-11-29T21:39:19Z DDEBUG Releasever: 8
2020-11-29T21:39:19Z DEBUG cachedir: /var/cache/dnf
2020-11-29T21:39:19Z DDEBUG Base command: update
2020-11-29T21:39:19Z DDEBUG Extra commands: ['update']
2020-11-29T21:39:19Z DEBUG User-Agent: constructed: 'libdnf (CentOS Stream 8; generic; Linux.x86_64)'
2020-11-29T21:39:19Z DEBUG repo: using cache for: appstream
2020-11-29T21:39:19Z DEBUG appstream: using metadata from Thu 29 Oct 2020 06:52:17 PM PDT.
2020-11-29T21:39:19Z DEBUG repo: using cache for: baseos
2020-11-29T21:39:19Z DEBUG baseos: using metadata from Thu 29 Oct 2020 06:52:12 PM PDT.
2020-11-29T21:39:19Z DEBUG repo: using cache for: extras
2020-11-29T21:39:19Z DEBUG extras: using metadata from Fri 10 Jul 2020 07:19:28 AM PDT.
2020-11-29T21:39:20Z DEBUG repo: using cache for: epel-modular
2020-11-29T21:39:20Z DEBUG epel-modular: using metadata from Mon 16 Nov 2020 06:30:02 PM PST.
2020-11-29T21:39:20Z DEBUG repo: using cache for: epel
2020-11-29T21:39:20Z DEBUG epel: using metadata from Sat 28 Nov 2020 05:04:32 PM PST.
2020-11-29T21:39:20Z INFO Last metadata expiration check: 2:20:32 ago on Sun 29 Nov 2020 11:18:48 AM PST.
2020-11-29T21:39:20Z DDEBUG timer: sack setup: 420 ms
2020-11-29T21:39:20Z DEBUG Completion plugin: Generating completion cache...
2020-11-29T21:39:20Z DEBUG --> Starting dependency resolution
2020-11-29T21:39:20Z DEBUG --> Finished dependency resolution
2020-11-29T21:39:20Z DDEBUG timer: depsolve: 108 ms
2020-11-29T21:39:20Z INFO Dependencies resolved.
2020-11-29T21:39:20Z INFO Nothing to do.
2020-11-29T21:39:20Z INFO Complete!
2020-11-29T21:39:20Z DDEBUG Cleaning up.

# cat /etc/*-release
CentOS Stream release 8
NAME="CentOS Stream"
VERSION="8"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Stream 8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux 8"
REDHAT_SUPPORT_PRODUCT_VERSION="CentOS Stream"

# grep -rH enabled=1 /etc/yum.repos.d/*
/etc/yum.repos.d/CentOS-Stream-AppStream.repo:enabled=1
/etc/yum.repos.d/CentOS-Stream-BaseOS.repo:enabled=1
/etc/yum.repos.d/CentOS-Stream-Extras.repo:enabled=1
/etc/yum.repos.d/epel-modular.repo:enabled=1
/etc/yum.repos.d/epel.repo:enabled=1

これが私の仮想マシンとどう違うかを確認してください。

# grep -rH enabled=1 /etc/yum.repos.d/*
/etc/yum.repos.d/CentOS-AppStream.repo:enabled=1
/etc/yum.repos.d/CentOS-Base.repo:enabled=1
/etc/yum.repos.d/CentOS-Extras.repo:enabled=1
/etc/yum.repos.d/epel-modular.repo:enabled=1
/etc/yum.repos.d/epel.repo:enabled=1
/etc/yum.repos.d/google-chrome.repo:enabled=1

ミラーリスト

仮想マシンでは：

# find /var -name mirrorlist 
/var/cache/PackageKit/8/metadata/AppStream-8-x86_64/mirrorlist
/var/cache/PackageKit/8/metadata/BaseOS-8-x86_64/mirrorlist
/var/cache/PackageKit/8/metadata/extras-8-x86_64/mirrorlist
/var/cache/dnf/AppStream-a520ed22b0a8a736/mirrorlist
/var/cache/dnf/BaseOS-929b586ef1f72f69/mirrorlist
/var/cache/dnf/extras-2770d521ba03e231/mirrorlist

# find /var -name mirrorlist -exec cat {} \;
http://mirror.centos.org/centos/8/AppStream/x86_64/os/
http://mirror.centos.org/centos/8/BaseOS/x86_64/os/
http://mirror.centos.org/centos/8/extras/x86_64/os/
http://mirror.centos.org/centos/8/AppStream/x86_64/os/
http://mirror.centos.org/centos/8/BaseOS/x86_64/os/
http://mirror.centos.org/centos/8/extras/x86_64/os/

サーバーから：

# find /var -name mirrorlist 
/var/cache/PackageKit/8/metadata/AppStream-8-x86_64/mirrorlist
/var/cache/PackageKit/8/metadata/BaseOS-8-x86_64/mirrorlist
/var/cache/PackageKit/8/metadata/extras-8-x86_64/mirrorlist
/var/cache/dnf/appstream-773ef6463612e8e2/mirrorlist
/var/cache/dnf/baseos-055ffcb2ec25a27f/mirrorlist
/var/cache/dnf/extras-9705a089504ff150/mirrorlist

# find /var -name mirrorlist -exec cat {} \;
http://mirror.cc.columbia.edu/pub/linux/centos/8.2.2004/AppStream/x86_64/os/
http://repo.miserver.it.umich.edu/centos/8.2.2004/AppStream/x86_64/os/
http://mirror.mojohost.com/centos/8.2.2004/AppStream/x86_64/os/
http://mirror.genesisadaptive.com/centos/8.2.2004/AppStream/x86_64/os/
http://mirror.san.fastserv.com/pub/linux/centos/8.2.2004/AppStream/x86_64/os/
http://mirrors.usinternet.com/centos/8.2.2004/AppStream/x86_64/os/
http://repos.lax.layerhost.com/centos/8.2.2004/AppStream/x86_64/os/
http://ewr.edge.kernel.org/centos/8.2.2004/AppStream/x86_64/os/
http://repo1.dal.innoscale.net/centos/8.2.2004/AppStream/x86_64/os/
http://mirrors.xtom.com/centos/8.2.2004/AppStream/x86_64/os/
http://mirror.nodesdirect.com/centos/8.2.2004/BaseOS/x86_64/os/
http://distro.ibiblio.org/centos/8.2.2004/BaseOS/x86_64/os/
http://mirror.linux.duke.edu/pub/centos/8.2.2004/BaseOS/x86_64/os/
http://mirror.mojohost.com/centos/8.2.2004/BaseOS/x86_64/os/
http://mirror.sfo12.us.leaseweb.net/centos/8.2.2004/BaseOS/x86_64/os/
http://mirror.sesp.northwestern.edu/centos/8.2.2004/BaseOS/x86_64/os/
http://mirror.trouble-free.net/centos/8.2.2004/BaseOS/x86_64/os/
http://ftp.osuosl.org/pub/centos/8.2.2004/BaseOS/x86_64/os/
http://mirror.web-ster.com/centos/8.2.2004/BaseOS/x86_64/os/
http://mirror.rackspace.com/CentOS/8.2.2004/BaseOS/x86_64/os/
http://mirror.ette.biz/centos/8.2.2004/extras/x86_64/os/
http://mirror.wdc1.us.leaseweb.net/centos/8.2.2004/extras/x86_64/os/
http://mirror.rackspace.com/CentOS/8.2.2004/extras/x86_64/os/
http://mirror.vcu.edu/pub/gnu_linux/centos/8.2.2004/extras/x86_64/os/
http://mirrors.raystedman.org/centos/8.2.2004/extras/x86_64/os/
http://ftp.osuosl.org/pub/centos/8.2.2004/extras/x86_64/os/
http://centos.mirror.constant.com/8.2.2004/extras/x86_64/os/
http://us.mirror.nsec.pt/centos/8.2.2004/extras/x86_64/os/
http://mirror.oss.ou.edu/centos/8.2.2004/extras/x86_64/os/
http://mirror.sesp.northwestern.edu/centos/8.2.2004/extras/x86_64/os/
http://mirror.centos.org/centos/8-stream/AppStream/x86_64/os/
http://mirror.centos.org/centos/8-stream/BaseOS/x86_64/os/
http://mirror.centos.org/centos/8-stream/extras/x86_64/os/

だから全く違うのに…

.repoファイルの内容（Centosのみがリストされ、epelはリストされていません）：

/etc/yum.repos.d/CentOS-Stream-AppStream.repo:

# 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.

[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

-----------------------------------------------------

/etc/yum.repos.d/CentOS-Stream-BaseOS.repo:

# CentOS-Stream-BaseOS.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.

[baseos]
name=CentOS Stream $releasever - BaseOS
mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=BaseOS&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$stream/BaseOS/$basearch/os/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

-----------------------------------------------------

/etc/yum.repos.d/CentOS-Stream-Debuginfo.repo:

# CentOS-Stream-Debuginfo.repo
#
# All debug packages are merged into a single repo, split by basearch, and are
# not signed.

[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

-----------------------------------------------------

/etc/yum.repos.d/CentOS-Stream-Extras.repo:

# 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.

[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

-----------------------------------------------------

/etc/yum.repos.d/CentOS-Stream-HighAvailability.repo:

# CentOS-Stream-HighAvailability.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.

[ha]
name=CentOS Stream $releasever - HighAvailability
mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=HighAvailability&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$stream/HighAvailability/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

-----------------------------------------------------

/etc/yum.repos.d/CentOS-Stream-Media.repo:

# CentOS-Stream-Media.repo
#
# You can use this repo to install items directly off the installation media.
# Verify your mount point matches one of the below file:// paths.

[media-baseos]
name=CentOS Stream $releasever - Media - BaseOS
baseurl=file:///media/CentOS/BaseOS
        file:///media/cdrom/BaseOS
        file:///media/cdrecorder/BaseOS
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

[media-appstream]
name=CentOS Stream $releasever - Media - AppStream
baseurl=file:///media/CentOS/AppStream
        file:///media/cdrom/AppStream
        file:///media/cdrecorder/AppStream
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

-----------------------------------------------------

/etc/yum.repos.d/CentOS-Stream-Plus.repo:

# CentOS-Stream-Plus.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.

[plus]
name=CentOS Stream $releasever - Plus
mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=centosplus&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$stream/centosplus/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

-----------------------------------------------------

/etc/yum.repos.d/CentOS-Stream-PowerTools.repo:

# 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.

[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

-----------------------------------------------------

/etc/yum.repos.d/CentOS-Stream-RealTime.repo:

# CentOS-Stream-RealTime.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.

[rt]
name=CentOS Stream $releasever - RealTime
mirrorlist=http://mirrorlist.centos.org/?release=$stream&arch=$basearch&repo=RT&infra=$infra
#baseurl=http://mirror.centos.org/$contentdir/$stream/RT/$basearch/os/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial

-----------------------------------------------------