Configuration Management

You can use configuration files and channels to manage configuration for your clients, rather than configuring each client manually. This workflow shows you how to use the Uyuni Web UI to create a centrally managed configuration file, assign it to a client, and apply the configuration.

1. Use Case

If you are managing a lot of clients, you probably do not want to manually apply configuration settings to each of them in turn. Configuration channels are used to organize configuration files. You can subscribe clients to configuration channels, and deploy configuration files as required.

2. Outcome

When you have completed this workflow, you will have a configuration channel containing a configuration file, have assigned clients to the channel, and applied the configuration successfully.

3. Preparation

Before you start, you should already have:

  • Uyuni Server installed, that you can access using the Web UI.

  • At least one client registered to your server.

  • Appropriate subscriptions from for the products you are using.

This workflow uses a centrally managed configuration file and a Salt state. You can also use locally managed configuration files and different methods, to get more flexibility in how you manage configuration in your environment. For more information about the different ways to manage configuration, see Configuration Management.

4. Step-by-step Workflow instructions

Procedure: Create a New Configuration Channel and file
  1. In the Uyuni Web UI, navigate to Configuration  Channels and click Create State Channel.

  2. Type a name, label, and description for your configuration file, and type the contents of your configuration file. An example that you can copy is at the end of this section. . Click Create Config State Channel

  3. Procedure: Assign Clients to the Configuration Channel

  4. In the Uyuni Web UI, navigate to Systems  Systems List and select the client you want to assign to your configuration channel.

  5. Navigate to the Configuration tab. In the guimenu:Configuration Overview section, click Subscribe to channels.

  6. Check the configuration channel you created earlier, and click Continue.

  7. If you have more than one configuration channel, you can rank them in order of importance, or click Update Channel Rankings to finish.

Procedure: Apply the Configuration to Your Client
  1. In the Uyuni Web UI, navigate to Systems  Systems List and select the client you want to assign to your configuration channel.

  2. Navigate to the Configuration tab. In the guimenu:Configuration Actions section, click Deploy all managed config files.

5. Example

5.1. SLS State for Keeping Clients Updated

  - channels

    - pkgs:
      - salt
      - salt-minion
{%- if grains.os_family == 'Suse'%}
      - zypper
      - libzypp
{%- elif grains['os_family'] == 'RedHat' %}
{%- if grains['osmajorrelease'] >= 8 %}
      - dnf
{%- else %}
      - yum
{%- endif %}
{%- endif %}
    - require:
      - sls: channels
    - order: last

    - require:
      - sls: channels
      - pkg: int_keep_system_up2date_updatestack
    - order: last

    - name: shutdown -r +5
{%- if grains['os_family'] == 'RedHat' and grains['osmajorrelease'] >= 8 %}
    - onlyif: 'dnf -q needs-restarting -r; [ $? -eq 1 ]'
{%- elif grains['os_family'] == 'RedHat' and grains['osmajorrelease'] <= 7 %}
    - onlyif: 'needs-restarting -r; [ $? -eq 1 ]'
{%- elif grains['os_family'] == 'Debian' %}
    - onlyif:
      - test -e /var/run/reboot-required
{%- else %}
    - onlyif: 'zypper ps -s; [ $? -eq 102 ]'
{%- endif %}