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Create a Local Yum Repository for Oracle Linux 8

This article describes the process of setting up local Yum repositories for Oracle Linux using yum.oracle.com as the source repository. If you have a ULN subscription, you should use the method described here.

Thanks to Todd Vierling for the heads up about a bunch of changes regarding RHEL8/OL8.

Repository Creation
Resync the Repository
Setup the HTTP Server
Point Servers to the Local Repository

Repository Creation

Install the following packages, which include the utilities necessary to set up the repository.

# dnf install -y dnf-utils

Create the following directories to hold the main OS and UEK respoitories.

# mkdir -p /u01/repo/OracleLinux
# mkdir -p /u01/repo/logs
# mkdir -p /u01/repo/scripts

If you've done a default installation of Oracle Linux 8, the "ol8_baseos_latest" and "ol8_appstream" repositories should already be enabled in the "/etc/yum.repos.d/oracle-linux-ol8.repo" file, and the "ol8_UEKR6" repository should already be enabled in the "/etc/yum.repos.d/uek-ol8.repo" file, but it's worth checking before you continue.

The reposync command is used to synchronize a remote yum repository to a local directory, using yum to retrieve the packages.

# /usr/bin/reposync --newest-only --download-metadata --repoid=ol8_baseos_latest -p /u01/repo/OracleLinux
# /usr/bin/reposync --newest-only --download-metadata --repoid=ol8_appstream -p /u01/repo/OracleLinux
# /usr/bin/reposync --newest-only --download-metadata --repoid=ol8_UEKR6 -p /u01/repo/OracleLinux

It takes a long time to sync the repositories the first time, so be patient. Subsequent refreshes only bring across the changed packages, so they are much quicker. The "newest-only" option reduces the total size of the download.

Resync the Repository

A resync of the Yum repositories involves repeating the reposync command, so you should script them and run them from CRON. Create a script called "/u01/repo/scripts/repo_sync.sh" with the following contents.

#!/bin/bash

LOG_FILE=/u01/repo/logs/repo_sync_$(date +%Y.%m.%d).log

# Remove old logs
find /u01/repo/logs/repo_sync* -mtime +5 -delete; >> $LOG_FILE 2>&1

# Sync repositories
/usr/bin/reposync --newest-only --download-metadata --refresh --repoid=ol8_baseos_latest -p /u01/repo/OracleLinux >> $LOG_FILE 2>&1
/usr/bin/reposync --newest-only --download-metadata --refresh --repoid=ol8_appstream -p /u01/repo/OracleLinux >> $LOG_FILE 2>&1
/usr/bin/reposync --newest-only --download-metadata --refresh --repoid=ol8_UEKR6 -p /u01/repo/OracleLinux >> $LOG_FILE 2>&1

Make the file executable.

# chmod u+x /u01/repo/scripts/repo_sync.sh

Set up a CRON job to run the script on a daily basis. The following entry runs the script each day at 01:00.

0 1 * * * /u01/repo/scripts/repo_sync.sh > /dev/null 2>&1

Setup the HTTP Server

Install the Apache HTTP servers, start it and make sure it restarts automatically on reboot.

# dnf install -y httpd
# systemctl start httpd
# systemctl enable httpd

If you are using the Linux firewall you will need to punch a hole for port 80.

# firewall-cmd --permanent --zone=public --add-port=80/tcp
# firewall-cmd --reload

Either set SELinux to permissive, or configure the fcontext for the repository files as shown below.

# # One-off configuration.
# dnf install -y policycoreutils-python-utils
# semanage fcontext -a -t httpd_sys_content_t "/u01/repo/OracleLinux(/.*)?"

# # Run each time the repo contents change.
# restorecon -F -R -v /u01/repo/OracleLinux

Present the repositories using the HTTP server.

# mkdir -p /var/www/html/repo/OracleLinux/ol8_baseos_latest
# ln -s /u01/repo/OracleLinux/ol8_baseos_latest/ /var/www/html/repo/OracleLinux/ol8_baseos_latest/x86_64

# mkdir -p /var/www/html/repo/OracleLinux/ol8_appstream
# ln -s /u01/repo/OracleLinux/ol8_appstream/ /var/www/html/repo/OracleLinux/ol8_appstream/x86_64

# mkdir -p /var/www/html/repo/OracleLinux/ol8_UEKR6
# ln -s /u01/repo/OracleLinux/ol8_UEKR6/ /var/www/html/repo/OracleLinux/ol8_UEKR6/x86_64

Copy the GPG key to the HTTP server.

cp /etc/pki/rpm-gpg/RPM-GPG-KEY-oracle /var/www/html/RPM-GPG-KEY-oracle-ol8

Point Servers to the Local Repository

To allow a server to use the local Yum repositories, create a file called "/etc/yum.repos.d/local-ol8.repo" with the following contents, where "ol8-yum.localdomain" is the name of the server with the Yum repositories.

[local_ol8_baseos_latest]
name=Oracle Linux $releasever Latest ($basearch)
baseurl=http://ol8-yum.localdomain/repo/OracleLinux/ol8_baseos_latest/$basearch/
gpgkey=http://ol8-yum.localdomain/RPM-GPG-KEY-oracle-ol8
gpgcheck=1
enabled=1

[local_ol8_appstream]
name=Oracle Linux AppStream $releasever Latest ($basearch)
baseurl=http://ol8-yum.localdomain/repo/OracleLinux/ol8_appstream/$basearch/
gpgkey=http://ol8-yum.localdomain/RPM-GPG-KEY-oracle-ol8
gpgcheck=1
enabled=1

[local_ol8_UEKR6]
name=Latest Unbreakable Enterprise Kernel for Oracle Linux $releasever ($basearch)
baseurl=http://ol8-yum.localdomain/repo/OracleLinux/ol8_UEKR6/$basearch/
gpgkey=http://ol8-yum.localdomain/RPM-GPG-KEY-oracle-ol8
gpgcheck=1
enabled=1

For more information see:

Hope this helps. Regards Tim...

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