almalinux-mirror / dnf pull-through cache

This host mirrors repo.almalinux.org — BaseOS, AppStream, extras, and CRB — across the currently supported AlmaLinux major releases. Point dnf/yum here to speed up installs and cut outbound bandwidth. The examples below use mirror.sepehrsabz.ir/almalinux.

01 — REPO FILES

Point baseurl at the mirror, disable mirrorlist

Edit AlmaLinux's .repo files in /etc/yum.repos.d/ — comment out mirrorlist= and set baseurl= to the mirror instead.

/etc/yum.repos.d/almalinux-baseos.repo

[baseos]
name = AlmaLinux $releasever - BaseOS
#mirrorlist = https://mirrors.almalinux.org/mirrorlist/$releasever/baseos
baseurl = https://mirror.sepehrsabz.ir/almalinux/$releasever/BaseOS/$basearch/os/
gpgcheck = 1
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-AlmaLinux

/etc/yum.repos.d/almalinux-appstream.repo

[appstream]
name = AlmaLinux $releasever - AppStream
#mirrorlist = https://mirrors.almalinux.org/mirrorlist/$releasever/appstream
baseurl = https://mirror.sepehrsabz.ir/almalinux/$releasever/AppStream/$basearch/os/
gpgcheck = 1
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-AlmaLinux

/etc/yum.repos.d/almalinux-crb.repo

[crb]
name = AlmaLinux $releasever - CRB
#mirrorlist = https://mirrors.almalinux.org/mirrorlist/$releasever/crb
baseurl = https://mirror.sepehrsabz.ir/almalinux/$releasever/CRB/$basearch/os/
gpgcheck = 1
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-AlmaLinux

CRB (CodeReady Builder, formerly PowerTools on AlmaLinux 8) is disabled by default — enable it with dnf config-manager --set-enabled crb if you need development headers or static libs from it.

02 — SUPPORTED RELEASES

What this mirror carries

Version	Upstream base	Notes
`10`	RHEL 10	Current major release
`9`	RHEL 9	Long-term maintained
`8`	RHEL 8	Maintained until EOL, check upstream

AlmaLinux tracks RHEL's own support lifecycle 1:1 — check wiki.almalinux.org/release-notes for exact end-of-life dates for each major version, since they follow Red Hat's published schedule rather than AlmaLinux's own cadence.

03 — DOCKER / CI

Repoint inside a build

Dockerfile

FROM almalinux:9
RUN sed -i 's|^mirrorlist|#mirrorlist|; s|^#baseurl=https://repo.almalinux.org|baseurl=https://mirror.sepehrsabz.ir|' \
      /etc/yum.repos.d/almalinux*.repo && \
    dnf makecache

The official AlmaLinux images already ship a commented-out baseurl= template pointing at repo.almalinux.org — uncomment and repoint that line rather than adding a new one, to avoid duplicate repo IDs.

04 — VERIFY

Confirm dnf is pulling through the mirror

shell

dnf repolist -v | grep -i baseurl
curl -s https://mirror.sepehrsabz.ir/almalinux/9/BaseOS/x86_64/os/repodata/repomd.xml -o /dev/null -w "%{http_code}\n"

# install something and time it
time sudo dnf install -y htop

Check	Expected result
`dnf repolist -v`	Shows `mirror.sepehrsabz.ir` as the baseurl
`GET /repodata/repomd.xml`	`200` — mirror is reachable
First install of a package	Slower — cache miss, fetched from upstream and stored
Repeat install elsewhere on the network	Fast — served from local cache

05 — NOTES

Package integrity is unaffected. gpgcheck=1 still validates every package against the AlmaLinux signing key regardless of which mirror served the bytes — switching baseurl doesn't touch that chain.

AlmaLinux is a 1:1 binary-compatible rebuild of RHEL, governed by the AlmaLinux OS Foundation — package versions and update timing track Red Hat's upstream releases closely. This mirror doesn't publish packages, only reads. If it's served over plain HTTP internally, that's fine for dnf — package signatures, not transport TLS, are what dnf actually trusts by default.