# The original goal was to test bug 1690388 (http://pad.lv/1690388)
# which reports to add mac address setting for a vlan.
#
# I took the basic config curtin examples/network-vlan.yaml [1]
# I modified it slightly to:
#   a.) add the correct mac address for my nic in a openstack vm.
#   b.) add the 'subnets: [{type: dhcp}]' line.
#
# Then I tried basically to manually put that into the system using
# net-convert, and reboot, expecting networking to come up.
#
# vlan fails to come up.  Instead of a nic named 'eth0.101', I get
# a nic named 'ens3'.
#
## finding: luser error. bah. I botched the 'rm' of .link files, leaving the
## previously generated cloud-init file
##  /etc/systemd/network/50-cloud-init-ens3.link
## and the vlan nic was getting renamed based on that.
##
#
# Further question... is there a problem with 70-persistent-net.rules 
# 
#
# [1] http://bazaar.launchpad.net/~curtin-dev/curtin/trunk/view/head:/examples/network-vlan.yaml

$ cat foo.cfg
network:
  version: 1
  config:
    # Physical interfaces.
    - type: physical
      name: eth0
      mac_address: "fa:16:3e:4b:63:49"
      subnets: [{type: dhcp}]
    # VLAN interface.
    - type: vlan
      name: eth0.101
      vlan_link: eth0
      vlan_id: 101
      mtu: 1500
      subnets:
        - type: static
          address: 192.168.0.2/24

$ python3 ./net-convert.py   \
   --network-data=foo.cfg --kind=yaml  \
   --output-kind=eni --directory=out.d | pastebinit
http://paste.ubuntu.com/24748387/

== out.d/etc/udev/rules.d/70-persistent-net.rules ==
 | SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="fa:16:3e:4b:63:49", NAME="eth0"
== out.d/etc/network/interfaces ==
 | auto lo
 | iface lo inet loopback
 | 
 | auto eth0
 | iface eth0 inet dhcp
 | 
 | auto eth0.101
 | iface eth0.101 inet static
 |     address 192.168.0.2/24
 |     mtu 1500
 |     vlan-raw-device eth0
 |     vlan_id 101
== out.d/etc/systemd/network/50-cloud-init-eth0.link ==
 | [Match]
 | MACAddress=fa:16:3e:4b:63:49
 | 
 | [Link]
 | Name=eth0


$ sudo cp out.d/etc/network/interfaces /etc/network/interfaces
$ sudo rm -f /etc/systemd/network/50-cloud-init-*

## drop the .rules files and update the initramfs
$ sudo cp out.d/etc/udev/rules.d/70-persistent-net.rules /etc/udev/rules.d/70-persistent-net.rules
$ sudo update-initramfs -u -k all

## reboot
$ sudo reboot


## go back in
$ ifconfig -a
ens3      Link encap:Ethernet  HWaddr fa:16:3e:4b:63:49  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth0      Link encap:Ethernet  HWaddr fa:16:3e:4b:63:49  
          inet addr:10.5.0.8  Bcast:10.5.255.255  Mask:255.255.0.0
          inet6 addr: fe80::f816:3eff:fe4b:6349/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:8958  Metric:1
          RX packets:191 errors:0 dropped:0 overruns:0 frame:0
          TX packets:171 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:17704 (17.7 KB)  TX bytes:21651 (21.6 KB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:160 errors:0 dropped:0 overruns:0 frame:0
          TX packets:160 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:11840 (11.8 KB)  TX bytes:11840 (11.8 KB)


$ systemctl status --full --no-pager --output=short-precise networking.service  | cat
● networking.service - Raise network interfaces
   Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
  Drop-In: /run/systemd/generator/networking.service.d
           └─50-insserv.conf-$network.conf
   Active: failed (Result: exit-code) since Fri 2017-06-02 13:25:20 UTC; 3min 10s ago
     Docs: man:interfaces(5)
  Process: 879 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=1/FAILURE)
  Process: 783 ExecStartPre=/bin/sh -c [ "$CONFIGURE_INTERFACES" != "no" ] && [ -n "$(ifquery --read-environment --list --exclude=lo)" ] && udevadm settle (code=exited, status=0/SUCCESS)
 Main PID: 879 (code=exited, status=1/FAILURE)

Jun 02 13:25:20.351823 xenial-20170519-184349 systemd[1]: Starting Raise network interfaces...
Jun 02 13:25:20.687650 xenial-20170519-184349 ifup[879]: Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
Jun 02 13:25:20.694994 xenial-20170519-184349 ifup[879]: ERROR: trying to add VLAN #101 to IF -:eth0:-  error: File exists
Jun 02 13:25:20.697558 xenial-20170519-184349 ifup[879]: Cannot find device "eth0.101"
Jun 02 13:25:20.697875 xenial-20170519-184349 ifup[879]: Failed to bring up eth0.101.
Jun 02 13:25:20.723060 xenial-20170519-184349 systemd[1]: networking.service: Main process exited, code=exited, status=1/FAILURE
Jun 02 13:25:20.723639 xenial-20170519-184349 systemd[1]: Failed to start Raise network interfaces.
Jun 02 13:25:20.729119 xenial-20170519-184349 systemd[1]: networking.service: Unit entered failed state.
Jun 02 13:25:20.732909 xenial-20170519-184349 systemd[1]: networking.service: Failed with result 'exit-code'.


$ sudo cat /proc/net/vlan/config
VLAN Dev name   | VLAN ID
Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
ens3           | 101  | eth0


$ cp /var/log/cloud-init.log .
# edit it to get only this boot
$ pastebinit cloud-init.log
http://paste.ubuntu.com/24748526/

$ sudo sh -c 'cd /sys/class/net/ && grep -r .  ens3/'
ens3/mtu:1500
ens3/type:1
grep: ens3/phys_port_name: Operation not supported
ens3/netdev_group:0
ens3/flags:0x1002
ens3/power/control:auto
ens3/power/async:disabled
ens3/power/runtime_enabled:disabled
ens3/power/runtime_active_kids:0
ens3/power/runtime_active_time:0
grep: ens3/power/autosuspend_delay_ms: Input/output error
ens3/power/runtime_status:unsupported
ens3/power/runtime_usage:0
ens3/power/runtime_suspended_time:0
grep: ens3/speed: Invalid argument
grep: ens3/dormant: Invalid argument
ens3/name_assign_type:4
ens3/proto_down:0
ens3/addr_assign_type:0
grep: ens3/phys_switch_id: Operation not supported
ens3/dev_id:0x0
grep: ens3/duplex: Invalid argument
ens3/gro_flush_timeout:0
ens3/iflink:2
grep: ens3/phys_port_id: Operation not supported
ens3/addr_len:6
ens3/address:fa:16:3e:4b:63:49
ens3/operstate:down
ens3/carrier_changes:0
ens3/broadcast:ff:ff:ff:ff:ff:ff
ens3/queues/rx-0/rps_flow_cnt:0
ens3/queues/rx-0/rps_cpus:0
ens3/queues/tx-0/xps_cpus:0
ens3/queues/tx-0/tx_maxrate:0
ens3/queues/tx-0/tx_timeout:0
ens3/queues/tx-0/byte_queue_limits/limit:0
ens3/queues/tx-0/byte_queue_limits/limit_max:1879048192
ens3/queues/tx-0/byte_queue_limits/limit_min:0
ens3/queues/tx-0/byte_queue_limits/hold_time:1000
ens3/queues/tx-0/byte_queue_limits/inflight:0
ens3/tx_queue_len:1000
ens3/uevent:DEVTYPE=vlan
ens3/uevent:INTERFACE=ens3
ens3/uevent:IFINDEX=3
ens3/statistics/rx_fifo_errors:0
ens3/statistics/collisions:0
ens3/statistics/rx_errors:0
ens3/statistics/rx_compressed:0
ens3/statistics/rx_dropped:0
ens3/statistics/tx_packets:0
ens3/statistics/tx_errors:0
ens3/statistics/rx_missed_errors:0
ens3/statistics/rx_over_errors:0
ens3/statistics/tx_carrier_errors:0
ens3/statistics/tx_heartbeat_errors:0
ens3/statistics/rx_crc_errors:0
ens3/statistics/multicast:0
ens3/statistics/tx_fifo_errors:0
ens3/statistics/tx_aborted_errors:0
ens3/statistics/rx_bytes:0
ens3/statistics/tx_compressed:0
ens3/statistics/tx_dropped:0
ens3/statistics/rx_packets:0
ens3/statistics/tx_bytes:0
ens3/statistics/tx_window_errors:0
ens3/statistics/rx_frame_errors:0
ens3/statistics/rx_length_errors:0
ens3/dev_port:0
ens3/ifindex:3
ens3/link_mode:0
grep: ens3/carrier: Invalid argument


$ sudo sh -c '( cd /proc/net/vlan && grep -r . * )'
config:VLAN Dev name  | VLAN ID
config:Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
config:ens3           | 101  | eth0
ens3:ens3  VID: 101   REORDER_HDR: 1  dev->priv_flags: 1001
ens3:         total frames received            0
ens3:          total bytes received            0
ens3:      Broadcast/Multicast Rcvd            0
ens3:      total frames transmitted            0
ens3:       total bytes transmitted            0
ens3:Device: eth0
ens3:INGRESS priority mappings: 0:0  1:0  2:0  3:0  4:0  5:0  6:0 7:0
ens3: EGRESS priority mappings: 


$ dmesg | grep ens3
[    7.866724] ens3: renamed from eth0.101

$ dmesg | pastebinit
http://paste.ubuntu.com/24748553/

$ read up idle < /proc/uptime ; date -R --date="$up seconds ago"
Fri, 02 Jun 2017 13:25:12 +0000