Centos 7 saat ini sudah tidak lagi memberikan update-update security terbaru. Namum ada beberapa vendor lain yang masih memberikan update.

Sebenarnya kelanjutan dari Centos 7 ini adalah Centos 8, tetapi karena dia menggunakan konsep stream, maka banyak user yang beralih ke turunan lainnya yaitu seperti Rocky Linux atau Almalinux, dan saya sendiri server baru bnyak menggunakan rocky linux dan Almalinux.

Solusi Repo Centos7 EOL terbaru

1. Buat folder Backup repo

mkdir

sudo mkdir /etc/yum.repos.d/backups

2. Pindahkan semua repo CentOs dan Epel repo ke direktori old

sudo mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/backups/

3. Buat file repo baru CentOS.repo

vim /etc/yum.repos.d/CentOS.repo

4. Masukan baris berikut:

[base]
name=CentOS-7.9.2009 - Base
baseurl=http://vault.centos.org/7.9.2009/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
metadata_expire=never
 
#released updates
[updates]
name=CentOS-7.9.2009 - Updates
baseurl=http://vault.centos.org/7.9.2009/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
metadata_expire=never
 
# additional packages that may be useful
[extras]
name=CentOS-7.9.2009 - Extras
baseurl=http://vault.centos.org/7.9.2009/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=1
metadata_expire=never
 
# additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-7.9.2009 - CentOSPlus
baseurl=http://vault.centos.org/7.9.2009/centosplus/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=0
metadata_expire=never
 
#fasttrack - packages by Centos Users
[fasttrack]
name=CentOS-7.9.2009 - Contrib
baseurl=http://vault.centos.org/7.9.2009/fasttrack/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
enabled=0
metadata_expire=never

5. Buat baru file repo epel.repo

vim /etc/yum.repos.d/epel.repo

6. Masukan baris berikut:

[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
baseurl=https://archives.fedoraproject.org/pub/archive/epel/7/$basearch
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
metadata_expire=never
 
[epel-debuginfo]
name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
baseurl=https://archives.fedoraproject.org/pub/archive/epel/7/$basearch/debug
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1
metadata_expire=never
 
[epel-source]
name=Extra Packages for Enterprise Linux 7 - $basearch - Source
baseurl=https://archives.fedoraproject.org/pub/archive/epel/7/SRPMS
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=1
metadata_expire=never

7. Hapus metadata existing

yum clean all

8. Memuat list paket yang tersedia

yum check-update

9. Coba jalankan yum update

sudo yum update -y

Jika sudah sukses update, coba reboot server kamu , agar kernel terbaru bisa digunakan.

Catatan :

Jika mencoba yum update dan didapat error seperti berikut ini:

[root@xxx ~]# yum update
Loaded plugins: fastestmirror
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Repository fasttrack is listed more than once in the configuration
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"


One of the configured repositories failed (Unknown),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:

1. Contact the upstream for the repository and get them to fix the problem.

2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).

3. Run the command with the repository temporarily disabled
yum --disablerepo=<repoid> ...

4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:

yum-config-manager --disable <repoid>
or
subscription-manager repos --disable=<repoid>

5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:

yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

Cannot find a valid baseurl for repo: base/7/x86_64

maka kamu harus disable repo existing dengan cara :

yum --disablerepo=CentOS-Base.repo

ATAU memindahkan repo yang bermasalah ke folder lain.

mv /etc/yum.repos.d/CentOS-Base.repo CentOS-Base.repo

Kesimpulan

di saranakan untuk melakukan pengantian os dari Centos 7 ke Almalinux atau tidak ke Rocky Linux supaya dapet mendapatkan update.