lxc launch ubuntu:16.04 rv
it gets created and running
lxc launch ubuntu:18.04 mca
after installing
Error: Failed preparing container for start: Failed to start device “eth0”: Parent device “lxdbr0” doesn’t exist
And if I stop that running container in first step ,it won’t start again and shows the same error mentioned.
using :
Ubuntu 21.04
That’s normal, 16.04 ships with LXD 2.0 which didn’t have built-in network so the distro would ship some basic bridge setup in packaging.
LXD 2.1 and higher have built-in network management, so you’re expected to run lxd init which will guide you through setting up the network.
If all you want is create lxdbr0, you could do it with lxc network create lxdbr0
sudo lxc launch ubuntu:20.04 new2
Creating new2
Starting new2
Error: Failed preparing container for start: Failed to start device “eth0”: Parent device “lxdbr0” doesn’t exist
Trylxc info --show-log local:new2for more info
lxc network create lxdbr0
Error: The network already exists
Unable to create new network with network create and I tried removing all images and initialised it with “lxd init” again but only first image get “RUNNING” status and if I stop it with “lxc stop” it won’t start again once stopped even if there are no other images.
same error comes on start : Error: Failed preparing container for start: Failed to start device “eth0”: Parent device “lxdbr0” doesn’t exist
Please show output of the following commands on the host:
ip a
ip r
lxc network show lxdbr0
ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether 8c:8c:aa:ac:0b:ca brd ff:ff:ff:ff:ff:ff
altname enp3s0
3: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 44:af:28:f7:6b:6f brd ff:ff:ff:ff:ff:ff
inet 172.20.10.3/28 brd 172.20.10.15 scope global dynamic noprefixroute wlp4s0
valid_lft 85504sec preferred_lft 85504sec
inet6 fe80::ab73:522b:1520:bd7e/64 scope link noprefixroute
valid_lft forever preferred_lft forever
6: vethe33679d3@veth5889706a: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:16:3e:af:38:52 brd ff:ff:ff:ff:ff:ff
7: veth5889706a@vethe33679d3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 4e:a3:3b:db:f7:50 brd ff:ff:ff:ff:ff:ff
8: vethbd64af02@veth7dd70227: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:16:3e:8c:5f:a3 brd ff:ff:ff:ff:ff:ff
9: veth7dd70227@vethbd64af02: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether ca:0c:08:77:76:c7 brd ff:ff:ff:ff:ff:ff
11: vetha7d272a8@veth9220f597: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:16:3e:83:f9:cb brd ff:ff:ff:ff:ff:ff
12: veth9220f597@vetha7d272a8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether ba:b3:2b:f5:d0:e2 brd ff:ff:ff:ff:ff:ff
13: ovs-system: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 32:ef:e8:c1:e6:c3 brd ff:ff:ff:ff:ff:ff
inet6 fe80::30ef:e8ff:fec1:e6c3/64 scope link
valid_lft forever preferred_lft forever
14: br-int: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
link/ether 2a:df:f1:35:20:9c brd ff:ff:ff:ff:ff:ff
inet6 fe80::28df:f1ff:fe35:209c/64 scope link
valid_lft forever preferred_lft forever
29: vetha0fdd07@if28: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 66:e1:c1:ad:1b:3c brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::64e1:c1ff:fead:1b3c/64 scope link
valid_lft forever preferred_lft forever
ip r
default via 172.20.10.1 dev wlp4s0 proto dhcp metric 600
169.254.0.0/16 dev wlp4s0 scope link metric 1000
172.20.10.0/28 dev wlp4s0 proto kernel scope link src 172.20.10.3 metric 600
lxc network show lxdbr0
config:
ipv4.address: 10.124.224.1/24
ipv4.nat: “true”
ipv6.address: fd42:431:1889:1f8d::1/64
ipv6.nat: “true”
description: “”
name: lxdbr0
type: bridge
used_by:
And what version of LXD is this? I see @stgraber mentioning LXD 2.1 above, but your original post says you’re running on ubuntu 21.04?
Also, can you reload LXD and then look for any errors in the logs:
sudo systemctl reload snap.lxd.daemon
sudo journalctl -b | grep lxdbr0
yes I am using ubuntu 21.04 and version of lxd is 4.15 also I am not much expert in using these containers. Earlier I installed it on kali linux everything worked well but in this system I am getting too many errors .Tried many solutions nothing worked and even I think I have messed up more.
sudo lxd --version
4.15
sudo journalctl -b | grep lxdbr0
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9115] manager: (lxdbr0): new Bridge device (/org/freedesktop/NetworkManager/Devices/6)
Jun 21 09:44:40 amaan avahi-daemon[1371]: Joining mDNS multicast group on interface lxdbr0.IPv4 with address 10.166.212.1.
Jun 21 09:44:40 amaan avahi-daemon[1371]: New relevant interface lxdbr0.IPv4 for mDNS.
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9641] device (lxdbr0): state change: unmanaged → unavailable (reason ‘connection-assumed’, sys-iface-state: ‘external’)
Jun 21 09:44:40 amaan avahi-daemon[1371]: Registering new address record for 10.166.212.1 on lxdbr0.IPv4.
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9668] device (lxdbr0): state change: unavailable → disconnected (reason ‘connection-assumed’, sys-iface-state: ‘external’)
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9674] device (lxdbr0): Activation: starting connection ‘lxdbr0’ (2a40c791-aacc-4b1e-a370-ea7d35c66ebf)
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9675] device (lxdbr0): state change: disconnected → prepare (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9679] device (lxdbr0): state change: prepare → config (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9681] device (lxdbr0): state change: config → ip-config (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9684] device (lxdbr0): state change: ip-config → ip-check (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 09:44:40 amaan avahi-daemon[1371]: Joining mDNS multicast group on interface lxdbr0.IPv6 with address fd42:ad51:a11e:2dca::1.
Jun 21 09:44:40 amaan avahi-daemon[1371]: New relevant interface lxdbr0.IPv6 for mDNS.
Jun 21 09:44:40 amaan avahi-daemon[1371]: Registering new address record for fd42:ad51:a11e:2dca::1 on lxdbr0..
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9759] device (lxdbr0): state change: ip-check → secondaries (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9768] device (lxdbr0): state change: secondaries → activated (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 09:44:40 amaan NetworkManager[1380]: [1624248880.9779] device (lxdbr0): Activation: successful, device activated.
Jun 21 09:44:41 amaan audit[2995]: AVC apparmor=“STATUS” operation=“profile_load” profile=“unconfined” name=“lxd_dnsmasq-lxdbr0_</var/snap/lxd/common/lxd>” pid=2995 comm=“apparmor_parser”
Jun 21 09:44:41 amaan kernel: audit: type=1400 audit(1624248881.029:67): apparmor=“STATUS” operation=“profile_load” profile=“unconfined” name=“lxd_dnsmasq-lxdbr0_</var/snap/lxd/common/lxd>” pid=2995 comm=“apparmor_parser”
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: DHCPv6 stateless on lxdbr0
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: DHCPv4-derived IPv6 names on lxdbr0
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: router advertisement on lxdbr0
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: DHCPv6 stateless on fd42:ad51:a11e:2dca::, constructed for lxdbr0
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: DHCPv4-derived IPv6 names on fd42:ad51:a11e:2dca::, constructed for lxdbr0
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: router advertisement on fd42:ad51:a11e:2dca::, constructed for lxdbr0
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: DHCP, sockets bound exclusively to interface lxdbr0
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/test1
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/rv
Jun 21 09:44:41 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/mca
Jun 21 09:44:42 amaan kernel: lxdbr0: port 1(veth5889706a) entered blocking state
Jun 21 09:44:42 amaan kernel: lxdbr0: port 1(veth5889706a) entered disabled state
Jun 21 09:44:42 amaan netscript[3376]: {eth0|eno1|wlp4s0|lxcbr0|lxdbr0|veth5889706a|all}
Jun 21 09:44:42 amaan kernel: lxdbr0: port 1(veth5889706a) entered blocking state
Jun 21 09:44:42 amaan kernel: lxdbr0: port 1(veth5889706a) entered forwarding state
Jun 21 09:44:42 amaan kernel: IPv6: ADDRCONF(NETDEV_CHANGE): lxdbr0: link becomes ready
Jun 21 09:44:42 amaan NetworkManager[1380]: [1624248882.3374] device (lxdbr0): carrier: link connected
Jun 21 09:47:45 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/mca1
Jun 21 09:47:45 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/test1
Jun 21 09:47:45 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/rv
Jun 21 09:47:45 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/mca
Jun 21 09:47:50 amaan kernel: lxdbr0: port 2(veth7dd70227) entered blocking state
Jun 21 09:47:50 amaan kernel: lxdbr0: port 2(veth7dd70227) entered disabled state
Jun 21 09:47:50 amaan avahi-daemon[1371]: Interface lxdbr0.IPv6 no longer relevant for mDNS.
Jun 21 09:47:50 amaan avahi-daemon[1371]: Leaving mDNS multicast group on interface lxdbr0.IPv6 with address fd42:ad51:a11e:2dca::1.
Jun 21 09:47:50 amaan avahi-daemon[1371]: Interface lxdbr0.IPv4 no longer relevant for mDNS.
Jun 21 09:47:50 amaan avahi-daemon[1371]: Leaving mDNS multicast group on interface lxdbr0.IPv4 with address 10.166.212.1.
Jun 21 09:47:50 amaan avahi-daemon[1371]: Withdrawing address record for fd42:ad51:a11e:2dca::1 on lxdbr0.
Jun 21 09:47:50 amaan avahi-daemon[1371]: Withdrawing address record for 10.166.212.1 on lxdbr0.
Jun 21 09:47:50 amaan kernel: lxdbr0: port 1(veth5889706a) entered disabled state
Jun 21 09:47:50 amaan kernel: lxdbr0: port 2(veth7dd70227) entered disabled state
Jun 21 09:47:50 amaan dnsmasq-dhcp[3013]: router advertisement on fd42:ad51:a11e:2dca::, old prefix for lxdbr0
Jun 21 09:47:50 amaan kernel: lxdbr0: port 1(veth5889706a) entered disabled state
Jun 21 09:47:50 amaan NetworkManager[1380]: [1624249070.3754] device (lxdbr0): state change: activated → unmanaged (reason ‘unmanaged’, sys-iface-state: ‘removed’)
Jun 21 09:47:50 amaan sh[7541]: bridge lxdbr0 doesn’t exist; can’t delete it
Jun 21 10:00:50 amaan ovs-vsctl[12224]: ovs|00001|vsctl|INFO|Called as ovs-vsctl --if-exists del-port lxdbr0 veth7dd70227
Jun 21 10:00:50 amaan lxd.daemon[2552]: t=2021-06-21T10:00:50+0530 lvl=eror msg=“Failed to stop device” devName=eth0 err=“Failed to detach interface “veth7dd70227” from “lxdbr0”: Failed to run: ovs-vsctl --if-exists del-port lxdbr0 veth7dd70227: ovs-vsctl: unix:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)” instance=mca1 instanceType=container project=default
Jun 21 10:00:51 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/test1
Jun 21 10:00:51 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/rv
Jun 21 10:00:51 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/mca
Jun 21 10:00:58 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/test1
Jun 21 10:00:58 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/rv
Jun 21 10:01:04 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/rv
Jun 21 10:01:18 amaan ovs-vsctl[12951]: ovs|00001|vsctl|INFO|Called as ovs-vsctl --if-exists del-port lxdbr0 veth5889706a
Jun 21 10:01:18 amaan lxd.daemon[2552]: t=2021-06-21T10:01:18+0530 lvl=eror msg=“Failed to stop device” devName=eth0 err=“Failed to detach interface “veth5889706a” from “lxdbr0”: Failed to run: ovs-vsctl --if-exists del-port lxdbr0 veth5889706a: ovs-vsctl: unix:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)” instance=rv instanceType=container project=default
Jun 21 10:01:54 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/abc
Jun 21 10:04:57 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/new1
Jun 21 10:04:57 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/abc
Jun 21 10:06:46 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/new2
Jun 21 10:06:46 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/new1
Jun 21 10:06:46 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/abc
Jun 21 10:14:29 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/new1
Jun 21 10:14:29 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/abc
Jun 21 10:14:31 amaan dnsmasq-dhcp[3013]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/abc
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3181] manager: (lxdbr0): new Bridge device (/org/freedesktop/NetworkManager/Devices/14)
Jun 21 10:26:34 amaan avahi-daemon[1371]: Joining mDNS multicast group on interface lxdbr0.IPv4 with address 10.124.224.1.
Jun 21 10:26:34 amaan avahi-daemon[1371]: New relevant interface lxdbr0.IPv4 for mDNS.
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3644] device (lxdbr0): state change: unmanaged → unavailable (reason ‘connection-assumed’, sys-iface-state: ‘external’)
Jun 21 10:26:34 amaan avahi-daemon[1371]: Registering new address record for 10.124.224.1 on lxdbr0.IPv4.
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3676] device (lxdbr0): state change: unavailable → disconnected (reason ‘connection-assumed’, sys-iface-state: ‘external’)
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3689] device (lxdbr0): Activation: starting connection ‘lxdbr0’ (705c8ec2-4e7a-4700-b460-346b096723d4)
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3704] device (lxdbr0): state change: disconnected → prepare (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3709] device (lxdbr0): state change: prepare → config (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3713] device (lxdbr0): state change: config → ip-config (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3715] device (lxdbr0): state change: ip-config → ip-check (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 10:26:34 amaan avahi-daemon[1371]: Joining mDNS multicast group on interface lxdbr0.IPv6 with address fd42:431:1889:1f8d::1.
Jun 21 10:26:34 amaan avahi-daemon[1371]: New relevant interface lxdbr0.IPv6 for mDNS.
Jun 21 10:26:34 amaan avahi-daemon[1371]: Registering new address record for fd42:431:1889:1f8d::1 on lxdbr0..
Jun 21 10:26:34 amaan dnsmasq-dhcp[3013]: router advertisement on fd42:431:1889:1f8d::, old prefix for lxdbr0
Jun 21 10:26:34 amaan dnsmasq-dhcp[3013]: DHCPv6 stateless on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 10:26:34 amaan dnsmasq-dhcp[3013]: DHCPv4-derived IPv6 names on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 10:26:34 amaan dnsmasq-dhcp[3013]: router advertisement on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3992] device (lxdbr0): state change: ip-check → secondaries (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.3995] device (lxdbr0): state change: secondaries → activated (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 10:26:34 amaan NetworkManager[1380]: [1624251394.4009] device (lxdbr0): Activation: successful, device activated.
Jun 21 10:26:34 amaan audit[25581]: AVC apparmor=“STATUS” operation=“profile_replace” info=“same as current profile, skipping” profile=“unconfined” name=“lxd_dnsmasq-lxdbr0_</var/snap/lxd/common/lxd>” pid=25581 comm=“apparmor_parser”
Jun 21 10:26:34 amaan kernel: audit: type=1400 audit(1624251394.492:229): apparmor=“STATUS” operation=“profile_replace” info=“same as current profile, skipping” profile=“unconfined” name=“lxd_dnsmasq-lxdbr0_</var/snap/lxd/common/lxd>” pid=25581 comm=“apparmor_parser”
Jun 21 10:26:34 amaan dnsmasq-dhcp[25593]: DHCPv6 stateless on lxdbr0
Jun 21 10:26:34 amaan dnsmasq-dhcp[25593]: DHCPv4-derived IPv6 names on lxdbr0
Jun 21 10:26:34 amaan dnsmasq-dhcp[25593]: router advertisement on lxdbr0
Jun 21 10:26:34 amaan dnsmasq-dhcp[25593]: DHCPv6 stateless on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 10:26:34 amaan dnsmasq-dhcp[25593]: DHCPv4-derived IPv6 names on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 10:26:34 amaan dnsmasq-dhcp[25593]: router advertisement on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 10:26:34 amaan dnsmasq-dhcp[25593]: DHCP, sockets bound exclusively to interface lxdbr0
Jun 21 10:28:22 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/ab
Jun 21 10:28:29 amaan kernel: lxdbr0: port 1(veth9220f597) entered blocking state
Jun 21 10:28:29 amaan kernel: lxdbr0: port 1(veth9220f597) entered disabled state
Jun 21 10:28:29 amaan avahi-daemon[1371]: Interface lxdbr0.IPv6 no longer relevant for mDNS.
Jun 21 10:28:29 amaan avahi-daemon[1371]: Leaving mDNS multicast group on interface lxdbr0.IPv6 with address fd42:431:1889:1f8d::1.
Jun 21 10:28:29 amaan avahi-daemon[1371]: Interface lxdbr0.IPv4 no longer relevant for mDNS.
Jun 21 10:28:29 amaan avahi-daemon[1371]: Leaving mDNS multicast group on interface lxdbr0.IPv4 with address 10.124.224.1.
Jun 21 10:28:29 amaan avahi-daemon[1371]: Withdrawing address record for fd42:431:1889:1f8d::1 on lxdbr0.
Jun 21 10:28:29 amaan avahi-daemon[1371]: Withdrawing address record for 10.124.224.1 on lxdbr0.
Jun 21 10:28:29 amaan dnsmasq-dhcp[25593]: router advertisement on fd42:431:1889:1f8d::, old prefix for lxdbr0
Jun 21 10:28:29 amaan dnsmasq-dhcp[3013]: router advertisement on fd42:431:1889:1f8d::, old prefix for lxdbr0
Jun 21 10:28:29 amaan NetworkManager[1380]: [1624251509.3559] device (lxdbr0): state change: activated → unmanaged (reason ‘connection-assumed’, sys-iface-state: ‘external’)
Jun 21 10:28:29 amaan kernel: lxdbr0: port 1(veth9220f597) entered disabled state
Jun 21 10:28:29 amaan sh[29932]: bridge lxdbr0 doesn’t exist; can’t delete it
Jun 21 10:29:40 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/abc
Jun 21 10:29:40 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/ab
Jun 21 10:30:19 amaan ovs-vsctl[33630]: ovs|00001|vsctl|INFO|Called as ovs-vsctl --if-exists del-port lxdbr0 veth9220f597
Jun 21 10:30:19 amaan lxd.daemon[25430]: t=2021-06-21T10:30:19+0530 lvl=eror msg=“Failed to stop device” devName=eth0 err=“Failed to detach interface “veth9220f597” from “lxdbr0”: Failed to run: ovs-vsctl --if-exists del-port lxdbr0 veth9220f597: ovs-vsctl: unix:/var/run/openvswitch/db.sock: database connection failed (No such file or directory)” instance=ab instanceType=container project=default
Jun 21 10:35:21 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/first
Jun 21 10:35:21 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/abc
Jun 21 10:35:21 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/ab
Jun 21 11:37:55 amaan sudo[58733]: amaan : TTY=pts/0 ; PWD=/home/amaan ; USER=root ; COMMAND=/usr/bin/lxd config device add first eth0 nic nictype=bridged parent=lxdbr0 name=eth0
Jun 21 11:38:29 amaan sudo[58789]: amaan : TTY=pts/0 ; PWD=/home/amaan ; USER=root ; COMMAND=/usr/sbin/ip link del lxdbr0
Jun 21 11:40:52 amaan sudo[59166]: amaan : TTY=pts/2 ; PWD=/home/amaan ; USER=root ; COMMAND=/usr/bin/systemctl enable --now lxd-dns-lxdbr0
Jun 21 11:45:05 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/c1
Jun 21 11:45:05 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/first
Jun 21 11:45:05 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/abc
Jun 21 11:45:05 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/ab
Jun 21 11:46:09 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/c1
Jun 21 11:46:09 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/first
Jun 21 11:46:09 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/abc
Jun 21 11:46:11 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/c1
Jun 21 11:46:11 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/first
Jun 21 11:46:15 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/first
Jun 21 11:46:48 amaan dnsmasq-dhcp[25593]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/first
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.7495] manager: (lxdbr0): new Bridge device (/org/freedesktop/NetworkManager/Devices/43)
Jun 21 14:11:33 amaan avahi-daemon[1371]: Joining mDNS multicast group on interface lxdbr0.IPv4 with address 10.124.224.1.
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8067] device (lxdbr0): state change: unmanaged → unavailable (reason ‘connection-assumed’, sys-iface-state: ‘external’)
Jun 21 14:11:33 amaan avahi-daemon[1371]: New relevant interface lxdbr0.IPv4 for mDNS.
Jun 21 14:11:33 amaan avahi-daemon[1371]: Registering new address record for 10.124.224.1 on lxdbr0.IPv4.
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8102] device (lxdbr0): state change: unavailable → disconnected (reason ‘connection-assumed’, sys-iface-state: ‘external’)
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8110] device (lxdbr0): Activation: starting connection ‘lxdbr0’ (459f0081-baf0-4709-aab0-9aa25004be3b)
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8126] device (lxdbr0): state change: disconnected → prepare (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8130] device (lxdbr0): state change: prepare → config (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8133] device (lxdbr0): state change: config → ip-config (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8136] device (lxdbr0): state change: ip-config → ip-check (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 14:11:33 amaan avahi-daemon[1371]: Joining mDNS multicast group on interface lxdbr0.IPv6 with address fd42:431:1889:1f8d::1.
Jun 21 14:11:33 amaan avahi-daemon[1371]: New relevant interface lxdbr0.IPv6 for mDNS.
Jun 21 14:11:33 amaan avahi-daemon[1371]: Registering new address record for fd42:431:1889:1f8d::1 on lxdbr0.*.
Jun 21 14:11:33 amaan dnsmasq-dhcp[25593]: router advertisement on fd42:431:1889:1f8d::, old prefix for lxdbr0
Jun 21 14:11:33 amaan dnsmasq-dhcp[3013]: router advertisement on fd42:431:1889:1f8d::, old prefix for lxdbr0
Jun 21 14:11:33 amaan dnsmasq-dhcp[25593]: DHCPv6 stateless on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 14:11:33 amaan dnsmasq-dhcp[25593]: DHCPv4-derived IPv6 names on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 14:11:33 amaan dnsmasq-dhcp[3013]: DHCPv6 stateless on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 14:11:33 amaan dnsmasq-dhcp[25593]: router advertisement on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 14:11:33 amaan dnsmasq-dhcp[3013]: DHCPv4-derived IPv6 names on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 14:11:33 amaan dnsmasq-dhcp[3013]: router advertisement on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 14:11:33 amaan audit[87038]: AVC apparmor=“STATUS” operation=“profile_replace” info=“same as current profile, skipping” profile=“unconfined” name=“lxd_dnsmasq-lxdbr0_</var/snap/lxd/common/lxd>” pid=87038 comm=“apparmor_parser”
Jun 21 14:11:33 amaan kernel: audit: type=1400 audit(1624264893.823:261): apparmor=“STATUS” operation=“profile_replace” info=“same as current profile, skipping” profile=“unconfined” name=“lxd_dnsmasq-lxdbr0_</var/snap/lxd/common/lxd>” pid=87038 comm=“apparmor_parser”
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8428] device (lxdbr0): state change: ip-check → secondaries (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8431] device (lxdbr0): state change: secondaries → activated (reason ‘none’, sys-iface-state: ‘external’)
Jun 21 14:11:33 amaan NetworkManager[1380]: [1624264893.8447] device (lxdbr0): Activation: successful, device activated.
Jun 21 14:11:34 amaan dnsmasq-dhcp[87050]: DHCPv6 stateless on lxdbr0
Jun 21 14:11:34 amaan dnsmasq-dhcp[87050]: DHCPv4-derived IPv6 names on lxdbr0
Jun 21 14:11:34 amaan dnsmasq-dhcp[87050]: router advertisement on lxdbr0
Jun 21 14:11:34 amaan dnsmasq-dhcp[87050]: DHCPv6 stateless on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 14:11:34 amaan dnsmasq-dhcp[87050]: DHCPv4-derived IPv6 names on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 14:11:34 amaan dnsmasq-dhcp[87050]: router advertisement on fd42:431:1889:1f8d::, constructed for lxdbr0
Jun 21 14:11:34 amaan dnsmasq-dhcp[87050]: DHCP, sockets bound exclusively to interface lxdbr0
Jun 21 14:11:34 amaan dnsmasq-dhcp[87050]: read /var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts/first
You can see in the logs that lxdbr0 bridge is being setup and your system is detecting it.
Then at 09:47.50 is it removed for some reason.
I can also see separately a manual sudo command to delete the bridge:
Jun 21 11:38:29 amaan sudo[58789]: amaan : TTY=pts/0 ; PWD=/home/amaan ; USER=root ; COMMAND=/usr/sbin/ip link del lxdbr0
Now you’ve restarted LXD can you show ip a again please.
Also, do you know why you appear to be running sudo ip link delete lxdbr0?
I thought of creating again so tried deleting it. Also followed some steps from stackoverflow . Sorry I am not sure about that.
ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether 8c:8c:aa:ac:0b:ca brd ff:ff:ff:ff:ff:ff
altname enp3s0
3: wlp4s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 44:af:28:f7:6b:6f brd ff:ff:ff:ff:ff:ff
inet 172.20.10.3/28 brd 172.20.10.15 scope global dynamic noprefixroute wlp4s0
valid_lft 85207sec preferred_lft 85207sec
inet6 fe80::ab73:522b:1520:bd7e/64 scope link noprefixroute
valid_lft forever preferred_lft forever
4: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 32:ef:e8:c1:e6:c3 brd ff:ff:ff:ff:ff:ff
5: br-int: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 2a:df:f1:35:20:9c brd ff:ff:ff:ff:ff:ff
6: lxcbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 00:16:3e:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.0.3.1/24 brd 10.0.3.255 scope global lxcbr0
valid_lft forever preferred_lft forever
7: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:f1:53:6b:4c brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
8: lxdbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 00:16:3e:07:5e:4b brd ff:ff:ff:ff:ff:ff
inet 10.124.224.1/24 scope global lxdbr0
valid_lft forever preferred_lft forever
inet6 fd42:431:1889:1f8d::1/64 scope global
valid_lft forever preferred_lft forever
lxdbr0 exists now so you should be able to start your containers.
The first instance works but another doesn’t work and even if I stop the first running one it won’t start again.
This was the initial problem so I did those changes and tried other steps.
Did you try reload LXD and then starting just your 2nd one?
Basically something on your system is removing the bridge, but I dont know what it is at the moment.
Reloading LXD will re-create the bridge.
I would suggest then starting to rule out your first container, and trying a couple of new containers to rule out anything in the first container as an issue.
If its still happening then see if there could be anything on your system that is removing the bridge.
on reloading its working and showing RUNNING status in both.
Thank you . I have installed OS again and it’s working fine. You were right something in my system was creating the issue. And I guess GNS3 last time I configured that.
Anyway thanks.
