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Chapter 9. Setting up a static networking configuration by using cloud-init

You can set up network configuration with cloud-init by adding a network-interfaces section to the metadata. With this setting, you can configure static IP addresses, gateways, and other network settings.

Red Hat Enterprise Linux (RHEL) provides its default networking service through NetworkManager, a dynamic network control and configuration daemon that keeps network devices and connections up and active when they are available.

Note

Your datasource might provide a network configuration. For details, see the cloud-init section Network Configuration Sources.

If you do not specify network configuration for cloud-init and have not disabled network configuration, cloud-init tries to determine if any attached devices have an existing connection. If it finds a connected device, it generates a network configuration that issues a DHCP request on the interface. Refer to the cloud-init documentation section Fallback Network Configuration for more information.

Prerequisites

  • Depending on the requirements of your datasource, edit the user-data file or add the following directive to the cloud.cfg.d directory:

    Note

    All user directives include #cloud-config at the top of the file so that cloud-init recognizes the file as containing user directives. When you include directives in the cloud.cfg.d directory, name the file *.cfg, and always include #cloud-config at the top of the file.

Procedure

  • Add a network-interfaces section. For example: 

    network:
  version: 1
  config:
    - type: physical
      name: eth0
      subnets:
        - type: static
          address: 192.0.2.1/24
          gateway: 192.0.2.254
    Copy to Clipboard Toggle word wrap
    Note

    You can disable a network configuration as follows: 

    network:
  config: disabled
    Copy to Clipboard Toggle word wrap
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