1.10 Setting up a Local Yum Server Using an ISO Image

To set up a local yum server (for example, if you have a network of systems that do not have Internet access):

  1. Choose one of the systems to be the yum server, and create a local yum repository on it as described in Section 1.9, “Creating a Local Yum Repository Using an ISO Image”.

  2. Install the Apache HTTP server from the local yum repository.

    # yum install httpd
  3. If SELinux is enabled in enforcing mode on your system:

    1. Use the semanage command to define the default file type of the repository root directory hierarchy as httpd_sys_content_t:

      # /usr/sbin/semanage fcontext -a -t httpd_sys_content_t "/var/OSimage(/.*)?"
    2. Use the restorecon command to apply the file type to the entire repository.

      # /sbin/restorecon -R -v /var/OSimage

    The semanage and restorecon commands are provided by the policycoreutils-python and policycoreutils packages.

  4. Create a symbolic link in /var/www/html that points to the repository:

    # ln -s /var/OSimage /var/www/html/OSimage
  5. Edit the HTTP server configuration file, /etc/httpd/conf/httpd.conf, as follows:

    1. Specify the resolvable domain name of the server in the argument to ServerName.

      ServerName server_addr:80

      If the server does not have a resolvable domain name, enter its IP address instead.

    2. Verify that the setting of the Options directive in the <Directory "/var/www/html"> section specifies Indexes and FollowSymLinks to allow you to browse the directory hierarchy, for example:

      Options Indexes FollowSymLinks
    3. Save your changes to the file.

  6. Start the Apache HTTP server, and configure it to start after a reboot.

    # systemctl start httpd
    # systemctl enable httpd
  7. If you have enabled a firewall on your system, configure it to allow incoming HTTP connection requests on TCP port 80, for example:

    # firewall-cmd --zone=zone --add-port=80/tcp
    # firewall-cmd --permanent --zone=zone --add-port=80/tcp
  8. Disable all existing yum repositories on the server and each client system.

    In the /etc/yum.repos.d directory, edit any existing repository files and disable all entries by setting enabled=0. If you have the yum-utils package installed, as described in Section 1.3.5, “Using Yum Utilities to Manage Configuration”, you can disable all repositories by running:

    # yum-config-manager --disable \*
  9. Edit the repository file on the server (for example, /etc/yum.repos.d/OL75.repo):

    name=Oracle Linux 7.5 x86_64

    Replace server_addr with the IP address or resolvable host name of the local yum server.

  10. On each client, copy the repository file from the server to the /etc/yum.repos.d directory.

  11. On the server and each client, test that you can use yum to access the repository.

    # yum repolist
    Loaded plugins: refresh-packagekit, security
    repo id                          repo name                                status
    OL75                             Oracle Linux 7.5 x86_64                  5,070
    repolist: 5,070