How to create Yum respository in RHEL 7

This blog shows the various steps needed to create a Yum repository in RHEL 7

1. Mount the ISO CD to your server

2. Navigate to the Packages directory under the ISO CD

[root@dev1 RHEL-7.3 Server.x86_64]# pwd
/run/media/root/RHEL-7.3 Server.x86_64
[root@dev1 RHEL-7.3 Server.x86_64]# ls -ltr
total 894
-r--r--r--.  1 root root  18092 Mar  6  2012 GPL
-r--r--r--.  1 root root   8266 Apr  4  2014 EULA
-r--r--r--.  1 root root   3211 Sep 27  2016 RPM-GPG-KEY-redhat-release
-r--r--r--.  1 root root   3375 Sep 27  2016 RPM-GPG-KEY-redhat-beta
-r--r--r--.  1 root root    114 Oct 19  2016 media.repo
-r--r--r--.  1 root root   1568 Oct 19  2016 TRANS.TBL
dr-xr-xr-x.  2 root root   4096 Oct 19  2016 repodata
dr-xr-xr-x. 24 root root   6144 Oct 19  2016 release-notes
dr-xr-xr-x.  2 root root 858112 Oct 19  2016 Packages
dr-xr-xr-x.  2 root root   2048 Oct 19  2016 LiveOS
dr-xr-xr-x.  2 root root   2048 Oct 19  2016 isolinux
dr-xr-xr-x.  3 root root   2048 Oct 19  2016 images
dr-xr-xr-x.  3 root root   2048 Oct 19  2016 EFI
dr-xr-xr-x.  4 root root   2048 Oct 19  2016 addons
[root@dev1 RHEL-7.3 Server.x86_64]#

3. Create a folder to copy the packages on the server. 

[root@dev1 ~]# pwd

/root

[root@dev1 ~]# mkdir repo

[root@dev1 repo]# pwd

/root/repo

4. Copy Packages from ISO cd to the folder created above (Step 3)

[root@dev1 RHEL-7.3 Server.x86_64]# cp Packages/* /root/repo/

....
....

[After files are copies]

[root@dev1 repo]# pwd
/root/repo
[root@dev1 repo]# ls -ltr *.rpm | wc -l
4751
[root@dev1 repo]#

5. Install createrepo package
[root@dev1 repo]# rpm -ivh createrepo-0.9.9-26.el7.noarch.rpm
warning: createrepo-0.9.9-26.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY
Preparing...                          ################################# [100%]
        package createrepo-0.9.9-26.el7.noarch is already installed
[root@dev1 repo]#

[In my case, its already installed]

6.  Create the repository using createrepo command

[root@dev1 repo]# createrepo /root/repo

Spawning worker 0 with 4751 pkgs

Workers Finished

Saving Primary metadata

Saving file lists metadata

Saving other metadata

Generating sqlite DBs

Sqlite DBs complete

[root@dev1 repo]#

7.