Public bug reported:
1. Zesty
2. 0.7.9-68-gef18b8ac-0ubuntu1
3. cloud-init with network configuration rendering to netplan config has
exclusive control over networkd configuration
4. On images with existing netplan configuration (UC16 has an
/etc/netplan/00-snapd-config.yaml); netplan generator will parse and write out
networkd config to /run/systemd/network/10-netplan-*
These files may collide with network-configuration provided to cloud-init which
has been configured to render netplan.
cloud-init should employ a 'maybe-delete' like function in the netplan
renderer to
a) remove /etc/netplan/00-snapd-config.yaml # this is the only known content
at this time
b) remove /run/systemd/network/10-netplan* # files generated from (a)
c) remove /run/systemd/generator/netplan.stamp # prevents new invocations of
netplan generate
Once these are removed, cloud-init netplan renderer may write out
netplan config, and invoke netplan generate successfully.
raharper@localhost:~$ find /etc/netplan /run/systemd/network
/etc/netplan
/etc/netplan/00-snapd-config.yaml
/run/systemd/network
/run/systemd/network/10-netplan-all-en.network
/run/systemd/network/10-netplan-all-eth.network
raharper@localhost:~$ ls -al /run/systemd/generator/netplan.stamp
-rw-r--r-- 1 root root 0 Mar 23 21:58 /run/systemd/generator/netplan.stamp
** Affects: cloud-init (Ubuntu)
Importance: Undecided
Status: New
** Tags: uc16
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https://bugs.launchpad.net/bugs/1675576
Title:
cloud-init netplan renderer might need to delete baked in
configuration
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