[lxc-users] instantiate_veth: 2669 failed to attach 'vethMU7OO1' to the bridge

[Mike Wright]

On 05/28/2017 10:46 AM, Rick Leir wrote:
> Hi all,
>
> Sorry for being so terse in the last post. It has been a year since I
> used LXC, and everything worked easily then.  Now, with a new Fedora 26
> system, it is not straightforward. How would you troubleshoot this?
>

> # brctl show
>
> bridge name    bridge id        STP enabled    interfaces
> virbr0        8000.525400c7428b    yes        virbr0-nic
> # lxc-checkconfig
> <all enabled>
>
> # lxc-create -n crowdsr -t fedora
>
> # lxc-start -n crowdsr -F
> lxc-start: conf.c: instantiate_veth: 2669 failed to attach 'vethMU7OO1'
> to the bridge 'lxcbr0': Operation not permitted

brctl shows only virbr0; you are trying to attach to lxcbr0 which, 
apparently, doesn't exist.  I thought lxc created that but you can add 
it with

   brctl addbr lxcbr0