diskimage-builder

History

Julia Kreger 46d12ae7d3 Handle NetworkManager for dhcp-all-interfaces NetworkManager takes a distinctly differnet network management approach and the bulk of the dhcp-all-interfaces code is largely targetted at distribution specific configuration. Some which may or may not override settings, or only partially assert desirable settings. As such, we need to set appropriate configuration, such as the correct client to be used, and timeouts based upon user supplied settings. By default this change sets the client to be dhclient on redhat styled machines, as the packaging default, while it works for ramdisk usage, it does not reset the interface between retries, which can be critical if the infrastucture operator is attempting to configure LACP trunks to the end node. Change-Id: I0e0cfbdbf7ef2b2861b934ccd7dab9d83a35c8f0 Story: 2008001 Task: 40648		2020-08-11 08:12:31 -07:00
..
install.d	Handle NetworkManager for dhcp-all-interfaces	2020-08-11 08:12:31 -07:00
element-deps	Move elements & lib relative to diskimage_builder package	2016-11-01 17:27:41 -07:00
package-installs.yaml	Add IPv6 support in dhcp-all-interfaces	2019-11-13 09:31:01 +01:00
pkg-map	Install ndisc6 package in element script	2019-12-03 14:57:33 +01:00
README.rst	Set the dhclient timeout to match DIB_DHCP_TIMEOUT	2018-04-05 14:29:22 +01:00

README.rst

===================
dhcp-all-interfaces
===================
Autodetect network interfaces during boot and configure them for DHCP

The rationale for this is that we are likely to require multiple
network interfaces for use cases such as baremetal and there is no way
to know ahead of time which one is which, so we will simply run a
DHCP client on all interfaces with real MAC addresses (except lo) that
are visible on the first boot.

On non-Gentoo based distributions the script
/usr/local/sbin/dhcp-all-interfaces.sh will be called early in each
boot and will scan available network interfaces and ensure they are
configured properly before networking services are started.

On Gentoo based distributions we will install the dhcpcd package and
ensure the service starts at boot.  This service automatically sets
up all interfaces found via dhcp and/or dhcpv6 (or SLAAC).

Environment Variables
---------------------

DIB_DHCP_TIMEOUT
  :Required: No
  :Default: 30
  :Description: Amount of time in seconds that the systemd service(or dhclient)
   will wait to get an address. Should be increased in networks such as
   Infiniband.
  :Example: DIB_DHCP_TIMEOUT=300