How to make your LXD containers get IP addresses from your LAN using macvlan

Update 22 June 2020 I have updated this post to be compatible with LXD 4.0. I also adapted it in order to create an empty profile that does only the macvlan stuff and is independent of the default profile. Finally, I am calling the profile macvlan (previous name: lanprofile).

WARNING #1: By using macvlan, your computer’s network interface will appear on the network to have more than one MAC address. This is fine for Ethernet networks. However, if your interface is a Wireless interface (with security like WPA/WPA2), then the access point will reject any other MAC addresses coming from your computer. Therefore, all these will not work in that specific case.

WARNING #2: If your host is in a virtual machine, then it is likely that the VM software will block the DHCP requests of the containers. There are options on both VMWare and Virtualbox to allow Promiscuous mode (somewhere in their Network settings). You need to enable that. Keep in mind that people reported success only on VMWare. Currently, on VirtualBox, you need to switch the network interface on the host into the PROMISC mode, as a workaround.

In LXD terminology, you have the host and then you have the many containers on this host. The host is the computer where LXD is running. By default, all containers run hidden in a private network on the host. The containers are not accessible from the local network, nor from the Internet. However, they have network access to the Internet through the host. This is NAT networking.

How can we get some containers to receive an IP address from the LAN and be accessible on the LAN?

This can be achieved using macvlan (L2) virtual network interfaces, a feature provided by the Linux kernel.

In this post, we are going to create a new LXD profile and configure macvlan in it. Then, we launch new containers under the new profile, or attach existing containers to the new profile (so they get as well a LAN IP address).

Creating a new LXD profile for macvlan

Let’s see what LXD profiles are available.

$ lxc profile list
| NAME       | USED BY |
| default    | 11      |

There is a single profile, called default, the default profile. It is used by 11 LXD containers on this system.

We create a new profile. The new profile is called macvlan.

$ lxc profile create macvlan
Profile macvlan created
$ lxc profile list
| NAME       | USED BY |
| default    | 11      |
| macvlan    | 0       |

What are the default settings of a new profile?

$ lxc profile show macvlan
config: {}
description: ""
devices: {}
name: macvlan
used_by: []

We need to add a nic with nictype macvlan and parent to the appropriate network interface on the host and we are then ready to go. Let’s identify the correct parent, using the ip route command. This command shows the default network route. It also shows the name of the device (dev), which is in this case enp5s12. (Before systemd, those used to be eth0 or wlan0. Now, the name varies depending on the specific network cards).

$ ip route show default
default via dev enp5s12 proto static metric 100

Now we are ready to add the appropriate device to the macvlan LXD profile. We use the lxc profile device add command to add a device eth0 to the profile lanprofile. We set nictype to macvlan, and parent to enp5s12.

$ lxc profile device add macvlan eth0 nic nictype=macvlan parent=enp5s12
Device eth0 added to macvlan
$ lxc profile show macvlan
config: {}
description: ""
    nictype: macvlan
    parent: enp5s12
    type: nic
name: macvlan
used_by: []

Well, that’s it. We are now ready to launch containers using this new profile, and they will get an IP address from the DHCP server of the LAN.

Launching LXD containers with the new profile

Let’s launch two containers using the new macvlan profile and then check their IP address. We need to specify first the default profile, and then the macvlan profile. By doing this, the container will get the appropriate base configuration from the first profile, and then the networking will be overridden by the macvlan profile.

$ lxc launch ubuntu:18.04 net1 --profile default --profile macvlan
Creating net1
Starting net1
$ lxc launch ubuntu:18.04 net2 --profile default --profile macvlan
Creating net2
Starting net2
$ lxc list
| NAME |  STATE  |        IPV4         | IPV6 |   TYPE    | SNAPSHOTS |
| net1 | RUNNING | (eth0)  |      | CONTAINER | 0         |
| net2 | RUNNING | (eth0)  |      | CONTAINER | 0         |

Both containers got their IP address from the LAN router. Here is the router administration screen that shows the two containers. I edited the names by adding LXD in the front to make them look nicer. The containers look and feel as just like new LAN computers!

Let’s ping from one container to the other.

$ lxc exec net1 -- ping -c 3
PING ( 56(84) bytes of data.
64 bytes from icmp_seq=1 ttl=64 time=0.064 ms
64 bytes from icmp_seq=2 ttl=64 time=0.067 ms
64 bytes from icmp_seq=3 ttl=64 time=0.082 ms

--- ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2036ms
rtt min/avg/max/mdev = 0.064/0.071/0.082/0.007 ms

You can ping these containers from other computers on your LAN! But the host and these macvlan containers cannot communicate over the network. This has to do with how macvlan works in the Linux kernel.


Help! I cannot ping between the host and the containers!

To be able to get the host and containers to communicate with each other, you need some additional changes to the host in order to get added to the macvlan as well. It discusses it here, though I did not test because I do not need communication of the containers with the host. If you test it, please report below.

Help! I do not get anymore those net1.lxd, net2.lxd fancy hostnames!

The default LXD DHCP server assigns hostnames like net1.lxd, net2.lxd to each container. Then, you can get the containers to communicate with each other using the hostnames instead of the IP addresses.

When using the LAN DHCP server, you would need to configure it as well to produce nice hostnames.

Help! Can these new macvlan containers read my LAN network traffic?

The new macvlan LXD containers (that got a LAN IP address) can only see their own traffic and also any LAN broadcast packets. They cannot see the traffic meant for the host, nor the traffic for the other containers.

Help! I get the error Error: Device validation failed “eth0”: Cannot use “nictype” property in conjunction with “network” property

A previous version of this tutorial had the old style of how to add a device to a LXD profile. The old style was supposed to work in compatibility mode in newer versions of LXD. But at least in LXD 4.2 it does not, and gives the following error. You should not get this error anymore since I have updated the post. You may get an error if you are using a very old LXD. In that case, report back in the comments please.

$ lxc profile device set macvlan eth0 nictype macvlan
Error: Device validation failed "eth0": Cannot use "nictype" property in conjunction with "network" property


With this tutorial, you are able to create containers that get an IP address from the LAN (same source as the host), using macvlan.

A downside is that the host and these macvlan containers cannot communicate over the network. For some, this is a neat advantage, because they shield the host from the containers.

The macvlan containers are then visible on the LAN and work just like another LAN computer.

This tutorial has been updated with the newer commands to edit a LXD profile (lxc profile device add). The older command now gives an error as you can see in the more recent comments below.

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    • brian mullan on January 22, 2018 at 23:48
    • Reply

    Great write-up Simos…

  1. Great – thanks for the brilliant written article – it works now!

    • Byung Gon on May 2, 2018 at 07:18
    • Reply

    I did it with the above post, but the container vm can not get the ip address. Tell me how to fix the problem.
    The test environment is DHCP.

    [root@ns01 ~]# uname -a
    Linux ns01 3.10.0-693.21.1.el7.x86_64 #1 SMP Wed Mar 7 19:03:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux (centos 7)

    [root@ns01 ~]# lxc list
    | c2 | RUNNING | | | PERSISTENT | 0 |

    [root@ns01 ~]# lxc profile show lanprofile
    config: {}
    description: Default LXD profile
    name: eth0
    nictype: macvlan
    parent: ens160
    type: nic
    path: /
    pool: default
    type: disk
    name: lanprofile
    – /1.0/containers/c2

    [root@ns01 ~]# ifconfig ens160
    ens160: flags=4163 mtu 1500
    inet netmask broadcast
    inet6 fe80::9e56:786c:39be:e30a prefixlen 64 scopeid 0x20
    ether 00:0c:29:22:66:3e txqueuelen 1000 (Ethernet)
    RX packets 4342 bytes 1841714 (1.7 MiB)
    RX errors 0 dropped 12 overruns 0 frame 0
    TX packets 2515 bytes 262656 (256.5 KiB)
    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

    [root@ns01 ~]# ip route show
    default via dev ens160 proto static metric 100

    ======= below c2 (centos 7) ======
    [root@c2 ~]# ip -d link show eth0
    7: eth0@if2: mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT qlen 1000
    link/ether 00:16:3e:f4:6f:8d brd ff:ff:ff:ff:ff:ff link-netnsid 0 promiscuity 0
    macvlan mode bridge addrgenmode eui64


    1. Do you use a VM for the host? If so, then the VM might be the issue.
      Also, if the host is on a wireless interface, then that’s definitely the issue.

    • Ray Jender on May 26, 2018 at 14:47
    • Reply

    I am getting this error when I try to start a macvlan container :

    ray@USN-LPC:/var/lib/lxd/containers$ lxc start LPC2
    error: Failed to run: /usr/bin/lxd forkstart LPC2 /var/lib/lxd/containers /var/log/lxd/LPC2/lxc.conf:
    Try `lxc info –show-log LPC2` for more info

    ray@USN-LPC:/var/lib/lxd/containers$ lxc info LPC2
    Name: LPC2
    Remote: unix://
    Architecture: x86_64
    Created: 2018/05/26 13:14 UTC
    Status: Stopped
    Type: persistent
    Profiles: lanprofile

    ray@USN-LPC:/var/lib/lxd/containers$ lxc profile show lanprofile
    environment.http_proxy: “”
    user.network_mode: “”
    description: Default LXD profile
    nictype: macvlan
    parent: enp0s3
    type: nic
    path: /
    pool: lxdpool
    type: disk
    name: lanprofile
    – /1.0/containers/LPC2




    1. What does *lxc info –show-log LPC2* show? It should give a hint of the exact error.

  2. This worked perfectly on a CentOS 7.5 1804 (core) host on 8/21/2018. I created an LXD ZFS-backed container for Ubuntu 18.04 exactly as you describe, and it automatically got an address assigned on my home network LAN by the DHCP server on that LAN. The private network on the host that LXD gave me was useless, but the methods you illustrate here are very useful. Thanks for your work, and for the clarity of exposition as well! Bravo!

    1. Thanks Robert for the kind words!

    • Wouter on September 11, 2018 at 18:34
    • Reply

    Thanks for your article. I did not succeed with macvlan. On Ubuntu 17.10 server I have a container running with the name proxy:

    root@box:~# lxc list
    | proxy | RUNNING | | | PERSISTENT | 0 |

    with this MAC:

    root@box:~# lxc exec proxy ifconfig |grep ether
    ether 00:16:3e:23:71:a9 txqueuelen 1000 (Ethernet)

    that should be getting an IP; at least, the container is asking for one and is offered one:
    Sep 11 12:06:51 box dhcpd[5314]: DHCPDISCOVER from 00:16:3e:23:71:a9 via enp1s0f1
    Sep 11 12:06:51 box dhcpd[5314]: DHCPOFFER on to 00:16:3e:23:71:a9 via enp1s0f1

    but is not:

    root@box:/var/log# lxc exec proxy ip a |grep inet\ 192
    root@box:/var/log# lxc exec proxy ifconfig |grep 192

    and ICMP doesnt work:
    root@box:/var/log# ping -c1
    PING ( 56(84) bytes of data.
    From icmp_seq=1 Destination Host Unreachable

    root@box:/var/log# lxc profile show lanprofile |grep “nictype|parent”
    nictype: macvlan
    parent: enp1s0f1

    I stopped and started the container several times and also did a reinstall / reinit of lxd several times. Please help :).

    root@box:/var/log# lxc –version

    root@box:/var/log# lxc network list |grep “lx|enp1s0f1”
    | enp1s0f1 | physical | NO | | 1 |
    | lxcbr0 | bridge | NO | | 0 |
    | lxdbr0 | bridge | YES | | 0 |

    1. Since your container requests an IP address and is offered one, then any problem should be related to the operating system of the container. I cannot think of the scenario that the DHCPOFFER being somehow blocked and not reaching the container. You can get the DHCP client in the container to output debugging information in order to see how it processes the DHCPOFFER.

      In addition, I notice that you are running LXD 2.18. If I remember correctly, you probably use a PPA or the backports repository. I suggest to upgrade to the snap package, which currently has LXD 3.4. An upgrade should not directly fix the issue that you are facing. However, version 2.18 of LXD is not supported as far as I remember. Only version 2.0.11 (Ubuntu 16.04), 3.0.x (Ubuntu 18.04) are supported until the EOL of the corresponding LTS Ubuntu version.

        • Wouter on September 12, 2018 at 08:38

        I was runnng 2.18 and upgraded via backports (thanks for the hint) to 2.21. No luck. Also, I launched both 16.04 and 18.04 containers with 2.21: no luck. dhclient -v eth0 says
        Listening on LPF/eth0/00:16:3e:db:e2:ce
        Sending on LPF/eth0/00:16:3e:db:e2:ce
        Sending on Socket/fallback
        DHCPDISCOVER on eth0 to port 67 interval 3 (xid=0x548c1235)
        how… I don’t understand, but it seems the answer (DHCPOFFER) is not received. Giving up for now. First, find time to reinstall the box with Ubuntu 18.04 and then further with LXD 3.x.


      1. If there was virtualization in play (like VirtualBox), then this would be explained easily. There is an issue with Virtualbox and the result is exactly what you describe. That is, the container does not receive the DHCPOFFER in order to continue with the rest of the protocol. The workaround in Virtualbox would be to put the host’s interface in promiscuous mode.

    • Wouter on September 12, 2018 at 17:03
    • Reply

    @Simos Xenitellis on September 12, 2018 at 16:24
    thanks for thinking with me. Its Ubuntu 17.10 on bare metal. Also, I installed the snap package with lxd 3.x (couldnt wait for finding time to install 18.04 :)) and it’s the same. Both 16.04 and 18.04 containers request DHCP, an offer is sent but not received.

    1. The macvlan functionality works in LXD, therefore I assume there is some issue with the network driver or network settings.

      I do not have the full picture. From the interface name (enp1s0f1), I assume it’s the second network interface of two? Can you verify with tshark that the DHCPOFFER is sent to the correct network interface?

        • Wouter on September 13, 2018 at 08:44

        Yes, enp1s0f1 is the second part of this NIC
        Yes, I did tcpdump on enp1s0f1 and saw the DHCPOFFER there; it’s also the only interface where dhcpd is listening on.

      1. I think that this stage you can post this issue on
        If it is a bug in LXD, it should be then reported on Github so that it gets fixed.

    • gunnar on October 5, 2018 at 05:18
    • Reply

    I can confirm that this is not working on a VirtualBox VM (ubuntu 18.04) as LXD host.

      • gunnar on October 5, 2018 at 05:26
      • Reply

      side comment … if u have a proxmox hist inside a VirtualBox VM there is no problem whatsoever to get public IP’s for containers working (shared adapter, no promiscous mode). So whether anyone could break down how proxmox handles networking for LXC containers cure might be around the corner.

        • Pilot on April 2, 2019 at 14:24

        LXC containers can receive address from DHCP either you have to use
        1. The “Adapter Type” should be set to “PCnet-FAST III” (not the default, which is an Intel PRO/1000 variant), see
        2. “Promiscuous Mode” should be set to “Allow All”.

        as mentioned here

        or you can use Intel PRO/1000 variant but then you have to create a br0 manually in host and add host’s nic to br0 through /etc/network/interfaces or through netplan. Then assign br0 to containers and of course Promiscuous Mode” should be set to Allow All.

    1. I have tried with Virtualbox (LXD running on Ubuntu 18.04 in a VirtualBox VM).
      I set up the Promiscuous setting in Virtualbox but macvlan did not work either.

      But when you set as well the host’s Ethernet interface in PROMISC mode, then it works.
      You can set it to PROMISC mode

      ip link set eth5 promisc on


      ifconfig eth5 promisc

      When you run proxmox, is the interface in PROMISC mode?

    • Tim Crosby on November 29, 2018 at 13:25
    • Reply

    I have followed this article and another youtube video and have created a set of LXD containers all using Ubuntu 18.04. I want to expose one of the containers to the internet since it is the primary web server for this system. All of the systems are using Static IP using MacVlan and have been configured with netplan 50-cloud.

    Host System – IP
    LXC System – NextCloud Server –
    LXC System – OnlyOffice Document Server –

    I can ping from my workstation to each of the systems, and from the system back to my work station, but when I try to ping from 2 or 3 to 1, it gets no response. I ping from 1 to 2 or 3, I get no response. I port forward to #2 on port 80. I try to access it from the web, I get page not found. I am sure I missed something, but have not found the magic key. Any thoughts?

    • AS on June 8, 2019 at 02:17
    • Reply

    I got this method working, but have found I can’t set static ip’s on the containers – Did you experience anything similar? – Do you think it might be because the network is no longer managed/ or a bug? – It’s driving me mad

    lxc network list
    | enp3s0 | physical | NO | | 0 |
    | enp3s0.102 | vlan | NO | | 2 |

    lxc config device set disco-test-002 eth0 ipv4.address

    lxc config device get disco-test-002 eth0 ipv4.address

    lxc list # After restart etc etc, ip returns to the dhcp leased address
    | disco-test-001 | RUNNING | (eth0) | | PERSISTENT | |
    | disco-test-002 | RUNNING | (eth0) | | PERSISTENT | |

    lxc version
    Client version: 3.13
    Server version: 3.13

    lxc config show disco-test-002
    architecture: x86_64
    image.architecture: amd64
    image.description: Ubuntu disco amd64 (20190607_07:42)
    image.os: Ubuntu
    image.release: disco
    image.serial: “20190607_07:42”
    volatile.base_image: fd3f73af851567ca5a4a3083b305a9e4c89fb0e52e74e9da3d095311b36f992b
    volatile.eth0.hwaddr: 00:16:3e:26:84:9a eth0
    volatile.idmap.base: “0”
    volatile.idmap.current: ‘[{“Isuid”:true,”Isgid”:false,”Hostid”:1000000,”Nsid”:0,”Maprange”:1000000000},{“Isuid”:false,”Isgid”:true,”Hostid”:1000000,”Nsid”:0,”Maprange”:1000000000}]’ ‘[{“Isuid”:true,”Isgid”:false,”Hostid”:1000000,”Nsid”:0,”Maprange”:1000000000},{“Isuid”:false,”Isgid”:true,”Hostid”:1000000,”Nsid”:0,”Maprange”:1000000000}]’
    volatile.last_state.idmap: ‘[{“Isuid”:true,”Isgid”:false,”Hostid”:1000000,”Nsid”:0,”Maprange”:1000000000},{“Isuid”:false,”Isgid”:true,”Hostid”:1000000,”Nsid”:0,”Maprange”:1000000000}]’
    volatile.last_state.power: RUNNING
    nictype: macvlan
    parent: enp3s0.102
    type: nic
    ephemeral: false
    – default
    stateful: false
    description: “”

    1. When you use macvlan, the container’s networking is not managed anymore by LXD (“unmanaged”).
      Therefore, commands like “lxc config device set disco-test-002 eth0 ipv4.address” have no effect to such containers.

      With macvlan, it is up to you to configure the networking of a container, and LXD cannot do the configuration for you. Having said that, one option to set a static network configuration to a container using macvlan, is to use “cloud-init” in LXD. LXD supports cloud-init configuration, and passes it directly to the container. See me other post on cloud-init.

        • Wavex on May 23, 2020 at 09:09

        Hi Simos,
        This is a great writeup, and your contribution to opensource is really cool. I’ve got a couple questions, which perhaps you may have answered already somewhere, so please bare with me to ask again.
        I have a baremetal host that I’m trying to start using lxc/lxd on. It’s running Ubuntu 18.04 and I just initialized lxd on it. I have downloaded a guest ubuntu 16.04 lxc container and trying to assign an IPv6 to it based on macvlan (prefeered) but it seems not to be working.
        Any leads or step by step guide?
        Thank you.

      1. Thanks!

        When you use macvlan, then your host appears as yet another system on your LAN. It is good to set it up to get the network configuration from the network, therefore it is your network admin’s issue to set it up. Verify whether you get IPv4 address from the network before investigating an IPv6 address. If you want to set the IPv6 configuration manually, then this is a separate tutorial.

  3. Hi, what about case if we run lxd on virtualbox machines (by vagrant) ?

    it use nat network for internet access and hostonly network for connect vm machines.

    I run lxd on first vm, and if i use default network settings with lxdbr0, i have internet connection inside containers, but can’t access to container by ip from another vm in same network

    if i create in vagrant additional private network with dhcp ip resolving (eth2) and define in lxd profile macvlan based on this device – i have access to container ip from another vm, but internet access not available inside containers

    1. For testing, it is better to try first without Vagrant. Once you get a working configuration, you can automate with Vagrant.

      There are several combinations for the networking in VirtualBox virtual machines as shown in the table below,

      You mention that you have two VirtualBox VMs, both with “Host-only networking”? If that is the case, then according to the table any containers inside these VMs do not have Internet connectivity.

      I consider the two following scenarios of using LXD with macvlan, inside a VirtualBox virtual machine:

      1. A VirtualBox virtual machine with “Bridged networking” (it takes an IP address from the LAN), then configure LXD in this VM so that the containers also take IP addresses from the LAN (using macvlan).
      2. Same as before, but with two Virtualbox virtual machines with same configuration. Have the LXD containers get IP addresses from the LAN, then access each other, the VMs and the Internet.

      For this to work, you need to

      a1. Set in Virtualbox the Networking to “Bridged networking”.

      a2. In the Advanced tab, change the “Promiscuous Mode” setting from “Deny” to “Allow All”. It has to be “Allow All” for this to work.

      b. Start the VM and setup LXD. Create a LXD profile for macvlan (perhaps edit the “default” profile and add in there there configuration for macvlan.

      c. In the VM, set the network interface into promiscuous mode as well. For example, “sudo ip link set enp0s3 promisc on”.

      d. Create a LXD container with macvlan configuration. It will be able to get an IP address from your LAN and all will work fine.

      e. Repeat with multiple VMs. The LXD containers will be able to access each other, the LAN, the VMs and the Internet.

      1. Thanks for reply. So internet access from containers inside VM possible only with bridged vagrant mode, and there are no way to create any additional ip rules inside VM for containers?

        And also one moment, internet access for my work machine provided by router, i have static ip, not dhcp mode

      2. for clear explanation, i don’t need access from internet to containers, only from containers to internet. And network example – green lines – ping success, red – failed

      3. According to the table at
        there are three different network settings for the VM (therefore, the containers) to access the Internet. See the column “Access Guest -> external Network”.

        It is OK if your work machine is assigned a static IP. If there is no DHCP server, then you would have to setup manually the networking of each “macvlan” container.

        In the network diagram, VM1 is using NAT networking. Which means that the VM is not accessible directly by the LXD containers of VM2.

  4. Thanks a lot! It was very helpful!

    • Nathan on October 3, 2019 at 14:32
    • Reply

    Hi Simos,

    Thanks for the instructions provided above! I’ve followed them to the letter on several machines, but consistently see the same problem: my interface is consistently dropping packets.

    I’m referring to the host’s interface. The interface consistently drops 1 packet, roughly every 30 seconds. I have tested this with multiple containers running, but the packet loss remains constant (no increase with more containers).

    I’ve tested this in both ubuntu 16.04 and 18.04 across 3 different hosts, both have the same result. This happens whether the interface is in promiscuous mode or not.

    Do you have any idea what the cause could be?

    1. Hi Nathan,

      I have not noticed this issue. I suspect it would be a Linux kernel issue.
      Can you post some instructions on how to automate this check of the dropped packet?
      It would be good to be able to replicate before reporting.

        • Nathan on October 7, 2019 at 09:06

        Hi Simos,

        Thanks for your response. I’ve put together a quick way to monitor the issue this morning:

        while true; do
                echo "$(date +%F\ %T%z) | $interface -- $(ifconfig "$interface" | grep 'RX packets' | sed 's/  */ /g' | cut -d' ' -f4)"
                sleep 2
            read -t 0.25 -N 1 input
            if [ "$input" = 'q' -o "$input" = 'Q' ]; then

        The name of the interface being monitored should be supplied as an argument.

        The kernel releases that I’ve tested this on are ‘4.4.0-112-generic’ and ‘5.0.0-29-generic’ on Ubuntu 16.04.5 and 18.04.3 respectively.

      1. Thanks!

        There is a tool, dropwatch, at which may show some extra information on the cause of the packet drop.

        I tried with Linux 4.15 but could not replicate (see dropped packets in ifconfig output of the host’s interface, when a container was using the macvlan over that interface).

        • Nathan on October 8, 2019 at 09:31

        Hi Simos,

        Thanks for looking into this. Unfortunately, dropwatch hasn’t yielded any helpful information: I get long lists of ‘dropped packets’ whether packets are being dropped or not. The lists are similar and cover the same range of addresses regardless of whether packets are being dropped or not.

        I will continue to investigate and update you if I find the source of the problem.

    • Patrick Doyle on December 1, 2019 at 21:42
    • Reply

    Thank you for the write up. But I wonder if I (or perhaps) you missed something. In the intro, you outline that “we launch new containers under the new profile, or attach existing containers to the new profile”. But I don’t see the bit were we attach existing containers to the new profile. Could you show me how I would do that?



    1. Thanks!

      Here you go. You use lxc profile assign to assign a new set of profiles to an existing container. Previously, this subcommand used to be “attach”. Now, it’s assign.

      $ lxc launch ubuntu:18.04 mycontainer
      Creating mycontainer
      Starting mycontainer
      $ lxc list mycontainer
      |    NAME     |  STATE  |        IPV4         | IPV6 |    TYPE    | SNAPSHOTS |
      | mycontainer | RUNNING | (eth0) |      | PERSISTENT | 0         |
      $ lxc profile assign mycontainer default,macvlan
      Profiles default,macvlan applied to mycontainer
      $ lxc list mycontainer
      |    NAME     |  STATE  | IPV4 | IPV6 |    TYPE    | SNAPSHOTS |
      | mycontainer | RUNNING |      |      | PERSISTENT | 0         |
      $ lxc restart mycontainer
      $ lxc list mycontainer
      |    NAME     |  STATE  |        IPV4        | IPV6 |    TYPE    | SNAPSHOTS |
      | mycontainer | RUNNING | (eth0) |      | PERSISTENT | 0         |
  5. Simos,

    Have you seen this error before?

    Error: Device validation failed “eth0”: Cannot use “nictype” property in conjunction with “network” property

    I posted a write up with my own experience of deploying Macvlan & LXD (see and some users are coming across this error when then run this command:

    lxc profile device set lanprofile eth0 nictype macvlan

    While I’ve tried to reproduce the error, I haven’t been able to. I thought I might reach out because I feel you seem to have a much stronger grasp of this stuff than I do. I suspected maybe newer versions of LXD are causing it, but I’ve been unable to confirm.

    Much thanks!!

    1. Hi mrjones!

      You can show the profile with lxc profile show lanprovile in order to have an idea on what is in there.

      Such an error should be easy to diagnose, because you just need to copy the profile content in order to replicate.

        • Chriss_france on June 22, 2020 at 18:51

        The problem that I encounter and that mrjones transmitted to you is the impossibility of following this tutorial:

        There may be some prerequisites that have not been mentioned in this one.
        I have a fresh install of Ubuntu Server 20.04 amd64 and lxc 4.2

      1. You are both right. The syntax in lxc profile device add has changed in a recent version of LXD and the old syntax was supposed to work in a compatibility mode. However, in LXD 4.2 (at least) it gives the error that mrjones show above.

        If you get any other errors, please post the exact command that gives you these errors.

        By making these changes, it is likely that older versions of LXD may not be working. I do not know when the format changed, so it is up to you to notify me! 🙂

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