Results 1 to 4 of 4

Thread: Netplan: Add additional loopback interfaces for virtual networks.

Hybrid View

  1. #1
    Join Date
    Nov 2016
    Beans
    12

    Netplan: Add additional loopback interfaces for virtual networks.

    Hello,

    I'm virtualizing Mirantis Cloud Platform (OpenStack) on a single test node running Ubuntu 18.04 as the hypervisor. I need to create three separate virtual (loopback) networks (Deployment, Management, and Tenant) for the virtual machines. I will have one VM with four network interfaces (Internet, Deployment, Management, and Tenant) that will be running ClearOS for edge routing (and OpenVPN) between the real and virtual networks. How do you configure all of this with netplan? Below is the configuration:

    Physical devices: Dell quad port rNDC (two 10GbE and two 1GbE port)
    10GbE: br0 --> bond0 --> ens1 / ens2 (presently unconnected)
    1GbE: br1 --> bond1 -- ens3 / ens4 (plugged into the Internet)

    Networks:
    br0: unconnected
    Internet (br1): VLAN 1, 192.168.1.2/24 (Internet)
    Deployment Network (br2): VLAN 1, 10.0.0.2/24 (MaaS PXE Bootp / DHCP server will be running on this network)
    Management Network (br3): VLAN 10, 10.0.1.2/24 (Openstack control plane network)
    Tenant Network (br4): VLAN 20, 10.0.2.2/24 (Public network)

    ClearOS router / gateway:
    10.0.0.1 (br2/VLAN1), 10.0.1.1 (br3/VLAN10), 10.0.2.1 (br4/VLAN20).

  2. #2
    Join Date
    Nov 2016
    Beans
    12

    Re: Netplan: Add additional loopback interfaces for virtual networks.

    So apparently you don't need a loopback, dummy, or tap interface. netplan will happily create a floating bridge with no interfaces attached to it by using a null value [] in the interfaces section. It hangs for a few minutes at boot, but otherwise everything works as anticipated. Below is my netplan configuration file:

    Code:
    network:
      version: 2
      renderer: networkd
    
      ethernets:
        eno3:
          dhcp4: no
        eno4:
          dhcp4: no
    
      vlans:
        br3-vlan10:
          id: 10
          link: br3
          addresses: [10.0.1.2/24]
        br4-vlan20:
          id: 20
          link: br4
          addresses: [10.0.2.2/24]
    
      bonds:
        bond1:
          interfaces: [eno3, eno4]
          #parameters:
          #  mode: 802.3ad
    
      bridges:
        br1:
          interfaces: [bond1]
          dhcp4: no
          addresses: [192.168.1.186/24]
          gateway4: 192.168.1.1
          nameservers:
            addresses: [192.168.1.1]
        br2:
          interfaces: []
          addresses: [10.0.0.2/24]
        br3:
          interfaces: []
        br4:
          interfaces: []
    Here is ifconfig output:

    Code:
    bond1: flags=5187<UP,BROADCAST,RUNNING,MASTER,MULTICAST>  mtu 1500
            ether ae:b7:d6:20:2a:fb  txqueuelen 1000  (Ethernet)
            RX packets 10271  bytes 1113826 (1.1 MB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 704  bytes 111391 (111.3 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    br1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 192.168.1.186  netmask 255.255.255.0  broadcast 192.168.1.255
            inet6 fe80::b85a:acff:fec6:b06a  prefixlen 64  scopeid 0x20<link>
            inet6 2605:6000:101e:4260:b85a:acff:fec6:b06a  prefixlen 64  scopeid 0x0<global>
            ether ba:5a:ac:c6:b0:6a  txqueuelen 1000  (Ethernet)
            RX packets 2728  bytes 495517 (495.5 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 618  bytes 103785 (103.7 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    br2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 10.0.0.2  netmask 255.255.255.0  broadcast 10.0.0.255
            inet6 fe80::e01e:cff:fe62:c75d  prefixlen 64  scopeid 0x20<link>
            ether e2:1e:0c:62:c7:5d  txqueuelen 1000  (Ethernet)
            RX packets 19  bytes 1012 (1.0 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 18  bytes 1384 (1.3 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    br3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet6 fe80::8822:95ff:fe39:2543  prefixlen 64  scopeid 0x20<link>
            ether 8a:22:95:39:25:43  txqueuelen 1000  (Ethernet)
            RX packets 27  bytes 1548 (1.5 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 31  bytes 2390 (2.3 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    br4: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet6 fe80::ecb6:a3ff:fe59:e00c  prefixlen 64  scopeid 0x20<link>
            ether ee:b6:a3:59:e0:0c  txqueuelen 1000  (Ethernet)
            RX packets 27  bytes 1548 (1.5 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 31  bytes 2390 (2.3 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    br3-vlan10: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 10.0.1.2  netmask 255.255.255.0  broadcast 10.0.1.255
            inet6 fe80::8822:95ff:fe39:2543  prefixlen 64  scopeid 0x20<link>
            ether 8a:22:95:39:25:43  txqueuelen 1000  (Ethernet)
            RX packets 19  bytes 1012 (1.0 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 18  bytes 1384 (1.3 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    br4-vlan20: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet 10.0.2.2  netmask 255.255.255.0  broadcast 10.0.2.255
            inet6 fe80::ecb6:a3ff:fe59:e00c  prefixlen 64  scopeid 0x20<link>
            ether ee:b6:a3:59:e0:0c  txqueuelen 1000  (Ethernet)
            RX packets 19  bytes 1012 (1.0 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 18  bytes 1384 (1.3 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    eno3: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST>  mtu 1500
            ether ae:b7:d6:20:2a:fb  txqueuelen 1000  (Ethernet)
            RX packets 8831  bytes 831112 (831.1 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 352  bytes 54651 (54.6 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
            device interrupt 250  memory 0xdb000000-db7fffff
    
    
    eno4: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST>  mtu 1500
            ether ae:b7:d6:20:2a:fb  txqueuelen 1000  (Ethernet)
            RX packets 1440  bytes 282714 (282.7 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 352  bytes 56740 (56.7 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
            device interrupt 15  memory 0xdc000000-dc7fffff
    
    
    lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
            inet 127.0.0.1  netmask 255.0.0.0
            inet6 ::1  prefixlen 128  scopeid 0x10<host>
            loop  txqueuelen 1000  (Local Loopback)
            RX packets 20  bytes 1816 (1.8 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 20  bytes 1816 (1.8 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
            inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
            ether 52:54:00:df:38:68  txqueuelen 1000  (Ethernet)
            RX packets 0  bytes 0 (0.0 B)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 0  bytes 0 (0.0 B)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet6 fe80::fc54:ff:feed:9972  prefixlen 64  scopeid 0x20<link>
            ether fe:54:00:ed:99:72  txqueuelen 1000  (Ethernet)
            RX packets 87  bytes 4984 (4.9 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 7211  bytes 762165 (762.1 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    vnet1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet6 fe80::fc54:ff:fe3e:49a6  prefixlen 64  scopeid 0x20<link>
            ether fe:54:00:3e:49:a6  txqueuelen 1000  (Ethernet)
            RX packets 19  bytes 1278 (1.2 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 31  bytes 2390 (2.3 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    vnet2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet6 fe80::fc54:ff:fea4:f3a7  prefixlen 64  scopeid 0x20<link>
            ether fe:54:00:a4:f3:a7  txqueuelen 1000  (Ethernet)
            RX packets 27  bytes 2002 (2.0 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 44  bytes 3468 (3.4 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
    vnet3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            inet6 fe80::fc54:ff:feed:dbc6  prefixlen 64  scopeid 0x20<link>
            ether fe:54:00:ed:db:c6  txqueuelen 1000  (Ethernet)
            RX packets 27  bytes 2002 (2.0 KB)
            RX errors 0  dropped 0  overruns 0  frame 0
            TX packets 44  bytes 3468 (3.4 KB)
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    Here is ping output to show that it works (10.0.0.1 is on vlan1, 10.0.1.1 is on vlan10, and 10.0.2.1 is on vlan20):
    Code:
    root@lab:~# ping 10.0.0.1 -c 3
    PING 10.0.0.1 (10.0.0.1) 56(84) bytes of data.
    64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=0.893 ms
    64 bytes from 10.0.0.1: icmp_seq=2 ttl=64 time=0.312 ms
    64 bytes from 10.0.0.1: icmp_seq=3 ttl=64 time=0.349 ms
    
    
    --- 10.0.0.1 ping statistics ---
    3 packets transmitted, 3 received, 0% packet loss, time 2024ms
    rtt min/avg/max/mdev = 0.312/0.518/0.893/0.265 ms
    root@lab:~# ping 10.0.1.1 -c 3
    PING 10.0.1.1 (10.0.1.1) 56(84) bytes of data.
    64 bytes from 10.0.1.1: icmp_seq=1 ttl=64 time=1.22 ms
    64 bytes from 10.0.1.1: icmp_seq=2 ttl=64 time=0.577 ms
    64 bytes from 10.0.1.1: icmp_seq=3 ttl=64 time=0.292 ms
    
    
    --- 10.0.1.1 ping statistics ---
    3 packets transmitted, 3 received, 0% packet loss, time 2008ms
    rtt min/avg/max/mdev = 0.292/0.697/1.224/0.391 ms
    root@lab:~# ping 10.0.2.1 -c 3
    PING 10.0.2.1 (10.0.2.1) 56(84) bytes of data.
    64 bytes from 10.0.2.1: icmp_seq=1 ttl=64 time=0.739 ms
    64 bytes from 10.0.2.1: icmp_seq=2 ttl=64 time=0.339 ms
    64 bytes from 10.0.2.1: icmp_seq=3 ttl=64 time=0.222 ms
    
    
    --- 10.0.2.1 ping statistics ---
    3 packets transmitted, 3 received, 0% packet loss, time 2029ms
    rtt min/avg/max/mdev = 0.222/0.433/0.739/0.222 ms
    Last edited by nbritton; March 2nd, 2018 at 06:55 PM.

  3. #3
    Join Date
    Mar 2018
    Beans
    2

    Re: Netplan: Add additional loopback interfaces for virtual networks.

    [edit: removed all my probably-wrong info]
    Last edited by daxtens; May 17th, 2018 at 04:29 PM.

  4. #4
    Join Date
    Mar 2006
    Location
    Williams Lake
    Beans
    Hidden!
    Distro
    Ubuntu Development Release

    Re: Netplan: Add additional loopback interfaces for virtual networks.

    Thread closed, as Bionic has been released

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •