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rhel/centos: create local repos
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:Title:        rhel/centos: create local repos
:Author:       Douglas O'Leary <dkoleary@olearycomputers.com>
:Description:  How to create local repos
:Date created: 11/2013
:Date updated: 11/2013
:Disclaimer:   Standard: Use the information that follows at your own risk.  If you screw up a system, don't blame it on me...


The normal patching cycle is to patch dev, then QA, and then production moving 
to the next level after a suite of tests and a burn in period.  If you're 
using the vendor patch suite, you can't guarantee that the patches that were 
installed on dev are the ones that are being installed in production as 
patches get added every day. 

I understand there are a number of potential options to circumvent this; one
of them is listed below: creating your own patch repositories.

There are also a number of ways to access the new patch repo from other 
systems on your network.  The process below uses ftp.

1.  Install yum downloadonly, createrepo, and vsftpd, if not already done::

        yum -y install yum-downloadonly createrepo vsftpd

2.  Download the updates to a patch directory.  Update directory name
    as needed.::

        mkdir -p -m 755 /ignite/repos
        yum --downloadonly --downloaddir /ignite/repos update

3.  Create the local repo::

        createrepo /ignite/repos

4.  Create the yum repository file.  Update IP and directory names as 
    needed::

        # cat backup/local.repo 
        [local]
        name=local
        baseurl=ftp://192.168.122.2/pub/repos
        enabled=1
        gpgcheck=0

5.  OS maintenance:

    a.  Enable vsftpd::

            chkconfig vsftpd on
            service vsftpd start

    b.  Bind remount repos directory::

            mkdir -p -m 755 /var/ftp/pub/repos
            mount -bind /ignite/repos /var/ftp/pub/repos

    c.  Set selinux context::

            chcon -R -t public_content_t /ignite/repos

    d.  Update firewall, if required.
    
6.  Test with elinks: ``elinks ftp://localhost/pub/repos`` and
    ``yum repolist``

7.  Initiate your patching cycle.