5bed4a6d5e
When we configure dhcp interfaces before network.target has run, network.target will try to bring up those interfaces a second time after our service does so. This causes two issues - first, the network target will always fail because it can't bring up an interface that is already up, and second, when configuring interfaces that don't actually have an available DHCP server it will result in a five minute delay waiting for DHCP on those interfaces. This will also cause the network target to fail and is an unnecessary delay. By moving the dhcp-interface service to run after the network target we avoid both of these problems. network.target will still bring up the interfaces on subsequent boots. This could result in the five minute delay happening on reboots, but the expected use case for interfaces without DHCP is that they would be configured statically on initial deployment so this should be a minor issue. The dhcp-interface service is also configured to run before the network-online target so that services which depend on the network actually being available will not race the DHCP process. A snippet from /var/log/messages on a node with this patch applied is included in the bug to demonstrate the behavior described above. Change-Id: I5cfabf20f920beea52abf4c42362b6f6ac0b37c4 Closes-Bug: 1653812 |
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| install.d | ||
| element-deps | ||
| package-installs.yaml | ||
| pkg-map | ||
| 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).