Public bug reported:
static ip= address configuration does not end up in netplan file
klibc ipconfig process ip=...:$proto and dumps the state into a file,
which is then parsed to generate runtime netplan configs.
For static ip configuration ipconfig parses $proto values "off" "none"
"static" as the same PROTO_NONE and encodes it as PROTO="none" in the
serialized state file.
The function that dumps ip data (_declare_ip_info()) has keys only
values for dhcp dhcp4 dhcp6 static. But not "none" (used by ipconfig) or
"off" (as valid by the kernel).
This means that netplan files generated in /run for static ip
configuration are incomplete.
Imho we should accept "off" "none" "static" as all valid PROTO settings
for static ip configuration.
[Impact]
* `netplan apply` will not reapply static ip configuration as declared
in ip= kernel cmdline.
[Test Case]
* boot with static ip configuration in the kernel cmdline, e.g.
ip=10.245.232.12::10.245.232.1:255.255.255.255:clound01:enc603:none
Check that /run/netplan/*.yaml contains addresses stanzas.
[Regression Potential]
* Runtime netplan configuration will now be more complete. Meaning that
static ip addresses will now persist across `netplan apply` / downing,
and reupping an interface. Whilst it was intended for static ip
addresses to be there, it might be unexpected that they actually work
properly now.
** Affects: initramfs-tools (Ubuntu)
Importance: Undecided
Status: New
** Affects: initramfs-tools (Ubuntu Xenial)
Importance: Undecided
Status: New
** Affects: initramfs-tools (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: initramfs-tools (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Affects: initramfs-tools (Ubuntu Disco)
Importance: Undecided
Status: New
** Affects: initramfs-tools (Ubuntu Eoan)
Importance: Undecided
Status: New
** Also affects: initramfs-tools (Ubuntu Eoan)
Importance: Undecided
Status: New
** Also affects: initramfs-tools (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: initramfs-tools (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: initramfs-tools (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: initramfs-tools (Ubuntu Cosmic)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1832042
Title:
static ip= address configuration does not end up in netplan file
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