Public bug reported:

Create and set Brgidge of oepn vswich with netplan.
With the following settings, there is no problem with the network settings at 
boot time.
When changing the settings, the netplan command causes an error and the 
settings cannot be changed.

The cause is that the ovs-vsctl command is used to delete-> register when 
resetting.
An error occurs because the hwaddr ":" is passed to the command as it is.


/etc/netplan/01-netcfg.yaml
-----------------------------------------------------
network:
  ethernets:
    enp1s0:
      dhcp4: no
      dhcp6: no
  bridges:
    br-ex:
      addresses:
        - 192.168.0.1/24
        - 172.16.0.1/24
      gateway4: 192.168.0.254
      nameservers:
        search: [ develop.local ]
        addresses:
          - 192.168.0.254
      interfaces:
        - enp1s0
      openvswitch:
        other-config:
          hwaddr: 52:54:00:c7:8d:f3
  version: 2
-----------------------------------------------------


netplan apply
-----------------------------------------------------
ovs-vsctl: 52:54:00:c7:8d:f3: unexpected ":" parsing set of 1 or more strings
Traceback (most recent call last):
  File "/usr/sbin/netplan", line 23, in <module>
    netplan.main()
  File "/usr/share/netplan/netplan/cli/core.py", line 50, in main
    self.run_command()
  File "/usr/share/netplan/netplan/cli/utils.py", line 257, in run_command
    self.func()
  File "/usr/share/netplan/netplan/cli/commands/apply.py", line 55, in run
    self.run_command()
  File "/usr/share/netplan/netplan/cli/utils.py", line 257, in run_command
    self.func()
  File "/usr/share/netplan/netplan/cli/commands/apply.py", line 154, in 
command_apply
    NetplanApply.process_ovs_cleanup(config_manager, old_files_ovs, 
restart_ovs, exit_on_error)
  File "/usr/share/netplan/netplan/cli/commands/apply.py", line 315, in 
process_ovs_cleanup
    apply_ovs_cleanup(config_manager, ovs_old, ovs_current)
  File "/usr/share/netplan/netplan/cli/ovs.py", line 168, in apply_ovs_cleanup
    clear_setting(t, iface, setting, val)
  File "/usr/share/netplan/netplan/cli/ovs.py", line 94, in clear_setting
    _del_dict(type, iface, split[1], split[2], value)
  File "/usr/share/netplan/netplan/cli/ovs.py", line 52, in _del_dict
    subprocess.check_call([OPENVSWITCH_OVS_VSCTL, 'remove', type, iface, 
column, key, value])
  File "/usr/lib/python3.8/subprocess.py", line 364, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/usr/bin/ovs-vsctl', 'remove', 
'Bridge', 'br-ex', 'other-config', 'hwaddr', '52:54:00:c7:8d:f3']' returned 
non-zero exit status 1.
-----------------------------------------------------

ovs-vsctl list Bridge br-ex
-----------------------------------------------------
_uuid               : c3959c3c-459c-4cbd-956b-58464e59a35c
auto_attach         : []
controller          : [ba3026ab-8079-4ca3-b0d0-4027cc76900b]
datapath_id         : "0000525400c78df3"
datapath_type       : system
datapath_version    : "<unknown>"
external_ids        : {netplan="true", 
"netplan/global/set-fail-mode"=standalone, 
"netplan/mcast_snooping_enable"="false", 
"netplan/other-config/hwaddr"="52:54:00:c7:8d:f3", 
"netplan/rstp_enable"="false"}
fail_mode           : secure
flood_vlans         : []
flow_tables         : {}
ipfix               : []
mcast_snooping_enable: false
mirrors             : []
name                : br-ex
netflow             : []
other_config        : {hwaddr="52:54:00:c7:8d:f3", mac-table-size="50000"}
ports               : [5fc15fc7-f29d-4268-bc41-722b7809db0a, 
7479d3a6-1ee0-418d-8bc0-2353853c0b3d, 7b7ea0dc-e70a-46e1-9c7f-07afa0dac5e2]
protocols           : [OpenFlow10, OpenFlow13, OpenFlow14]
rstp_enable         : false
rstp_status         : {}
sflow               : []
status              : {}
stp_enable          : false
-----------------------------------------------------

Change line 52 in /usr/share/netplan/netplan/cli/ovs.py.
subprocess.check_call([OPENVSWITCH_OVS_VSCTL, 'remove', type, iface, column, 
key, value]) -> subprocess.check_call([OPENVSWITCH_OVS_VSCTL, 'remove', type, 
iface, column, key, '"%s"' % (value)])

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: netplan.io 0.101-0ubuntu3~20.04.2 [modified: 
usr/share/netplan/netplan/cli/ovs.py]
ProcVersionSignature: Ubuntu 5.4.0-70.78-generic 5.4.94
Uname: Linux 5.4.0-70-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: LXQt
Date: Sun Apr 18 10:22:39 2021
InstallationDate: Installed on 2021-04-10 (7 days ago)
InstallationMedia: Ubuntu-Server 20.04.2 LTS "Focal Fossa" - Release amd64 
(20210201.2)
SourcePackage: netplan.io
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: netplan.io (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal uec-images

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https://bugs.launchpad.net/bugs/1924883

Title:
  Error when resetting netplan

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