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DLPX-79416 [Backport of DLPX-79034 to 6.0.13.0] systemd-networkd releases its DHCP lease on restart #359

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DLPX-79416 [Backport of DLPX-79034 to 6.0.13.0] systemd-networkd releases its DHCP lease on restart #359

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17 changes: 17 additions & 0 deletions files/common/lib/systemd/network/99-delphix-defaults.network
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#
# See systemd.network(5) for a description of KeepConfiguration. We make this
# change here because the default behavior of systemd-networkd starting in
# Ubuntu 20.04 is to release a DHCP lease upon stopping systemd-networkd (even
# in the context of a restart). The impact of this is that the system's
# default route and IP address are removed, and then added back again when the
# service is started back up, resulting in a brief loss of network
# connectivity. Delphix, being a critical piece of infrastructure, cannot
# afford brief loss of connectivity. We thus change the KeepConfiguration
# setting so that systemd-networkd does not release the lease on stop.
#

[Match]
Name=*

[Network]
KeepConfiguration=dhcp-on-stop