Syncing and Serving Yum Repos on RHEL 8

My Lab machines do not have direct access to the internet. This mirrors how my customers tend to run their environments. Instead, I run a single bastion host that can connect to the internet, and use that to perform all operations on my lab machines.

While it is great to be able to use the Install media to add packlages to PXE booted systems, after some time, the set of packages available is older than you want. For example, I hit a bug that required an update of Network Manager. So, I want to make a local yum repo from my RHEL 8 subscription. RHEL 8 makes this fairly easy.

In my previous post, I created two yum repos, one for the BaseOS, and one for the App stream. Since I also heavily use Anisible, I will sync that repo as well. You can see the set of Repos I have installed on my Bastion host with:

# yum repolist enabled
Updating Subscription Management repositories.
repo id                                                                                                                                             repo name
ansible-2.9-for-rhel-8-x86_64-rpms                                                                                                                  Red Hat Ansible Engine 2.9 for RHEL 8 x86_64 (RPMs)
rhel-8-for-x86_64-appstream-rpms                                                                                                                    Red Hat Enterprise Linux 8 for x86_64 - AppStream (RPMs)
rhel-8-for-x86_64-baseos-rpms

I am going to do the same thing here for the repo sync. Since I have plenty of space on my Web Server machine, I am going to sync the files directly to a subdirectory already exposed by the web server. In this case: /var/www/html/yum. I create one sub directory for each of the yum repos listed above:

# ls -la
total 0
drwxr-xr-x.  5 root   root   125 Aug 11 11:59 .
drwxr-xr-x. 12 apache apache 266 Aug 11 10:07 ..
drwxr-xr-x.  2 root   root     6 Aug 11 10:09 ansible-2.9-for-rhel-8-x86_64-rpms
drwxr-xr-x.  3 root   root    46 Aug 11 10:34 rhel-8-for-x86_64-appstream-rpms
drwxr-xr-x.  3 root   root    43 Aug 11 10:13 rhel-8-for-x86_64-baseos-rpms
I use the yum-utils package tools to perform the reposync
yum install yum-utils

I like keeping the name of the repo and the directory in common. To sync the BaseOS (note, don’t do this yet…I’ll tell you why in a second)

reposync -p ./rhel-8-for-x86_64-baseos-rpms --download-metadata --repo=rhel-8-for-x86_64-baseos-rpms

And comparable for AppStream and Ansible.

Since the files are served via HTTPD, you want to make sure that SELinux allows access to them. To Check:

# ls -lZ rhel-8-for-x86_64-baseos-rpms/
total 0
drwxr-xr-x. 4 root root unconfined_u:object_r:httpd_sys_content_t:s0 38 Aug 11 10:17 rhel-8-for-x86_64-baseos-rpms

What? Where did it go?

Ah…so it decided that it was going to name the directory for me. I ended up with two levels of nesting. Fortunately, I can move everything up one level. Lesson learned, the right command would have been

reposync -p ./ –download-metadata –repo=rhel-8-for-x86_64-baseos-rpms

and I would not have had to create the sub directory. I am going to try that now with app stream:

reposync -p . --download-metadata --repo=rhel-8-for-x86_64-appstream-rpms
Updating Subscription Management repositories.
Red Hat Enterprise Linux 8 for x86_64 - AppStream (RPMs)                                                                                                                                                                                                                                      5.2 kB/s | 4.5 kB     00:00    
Red Hat Enterprise Linux 8 for x86_64 - AppStream (RPMs)                                                                                                                                                                                                                                      690 kB/s | 145 MB     03:35    
(1/11996): python3-prettytable-0.7.2-14.el8.noarch.rpm

That needs to synchronize over 10K packages: Make sure you don’t run out of disk space.

OK, going back to our messed up BaseOS, the solution to sort it is fairly simple: Move everything up one level of the directory structure.

cd rhel-8-for-x86_64-baseos-rpms/rhel-8-for-x86_64-baseos-rpms/
# ls
Packages  repodata
# mv * ..
# cd ..
# rmdir rhel-8-for-x86_64-baseos-rpms/
[root@nuzleaf rhel-8-for-x86_64-baseos-rpms]# ls -laZ
total 4
drwxr-xr-x.  4 root root unconfined_u:object_r:httpd_sys_content_t:s0   38 Aug 11 12:11 .
drwxr-xr-x.  5 root root unconfined_u:object_r:httpd_sys_content_t:s0  125 Aug 11 11:59 ..
drwxr-xr-x. 28 root root unconfined_u:object_r:httpd_sys_content_t:s0  240 Aug 11 10:17 Packages
drwxr-xr-x.  2 root root unconfined_u:object_r:httpd_sys_content_t:s0 4096 Aug 11 10:13 repodata

To confirm I can pull from this repo, I go to a client box and hit it with curl:

curl  https://nuzleaf.home.younglogic.net/yum/rhel-8-for-x86_64-baseos-rpms/repodata/repomd.xml

Now I can update my repository definition in /etc/yum/repos.d/

[nuzleaf]
baseurl= https://nuzleaf.home.younglogic.net/yum/rhel-8-for-x86_64-baseos-rpms
gpgkey=https://nuzleaf.home.younglogic.net/rhel8.2/RPM-GPG-KEY-redhat-release
name=Red Hat Enterprise Linux 8.2.0
mediaid=None
metadata_expire=-1
gpgcheck=0
cost=500
 
[nuzleafapps]
baseurl= https://nuzleaf.home.younglogic.net/yum/rhel-8-for-x86_64-appstream-rpms
gpgkey=https://nuzleaf.home.younglogic.net/rhel8.2/RPM-GPG-KEY-redhat-release
name=Red Hat Enterprise Linux 8.2.0 AppStream
mediaid=None
metadata_expire=-1
gpgcheck=0
cost=500

The package synchronization takes a while. A base insatall needs packages that are at the end of the list, too, so I had to wait until they were all sync’ed before I could do a yum update.

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