Quoting Natanael Copa (nc...@alpinelinux.org):
> Check for lxcbr0, virbr0 and br0 and use one of those if they exist.
>
> Set mac address if network type is veth.
>
> Signed-off-by: Natanael Copa <nc...@alpinelinux.org>
Acked-by: Serge E. Hallyn <serge.hal...@ubuntu.com>
> ---
> templates/lxc-alpine.in | 38 +++++++++++++++++++++++++++++---------
> 1 file changed, 29 insertions(+), 9 deletions(-)
>
> diff --git a/templates/lxc-alpine.in b/templates/lxc-alpine.in
> index b06215f..962d274 100644
> --- a/templates/lxc-alpine.in
> +++ b/templates/lxc-alpine.in
> @@ -76,7 +76,36 @@ copy_configuration() {
> if [ -n "$lxc_arch" ]; then
> echo "lxc.arch = $lxc_arch" >> $path/config
> fi
> +
> + lxc_network_link_line="# lxc.network.link = br0"
> + for br in lxcbr0 virbr0 br0; do
> + if [ -d /sys/class/net/$br/bridge ]; then
> + lxc_network_link_line="lxc.network.link = $br"
> + break
> + fi
> + done
> +
> + if ! grep -q "^lxc.network.type" $path/config 2>/dev/null; then
> + cat <<EOF >> $path/config
> +lxc.network.type = veth
> +$lxc_network_link_line
> +lxc.network.flags = up
> +EOF
> + fi
> +
> + # if there is exactly one veth network entry, make sure it has an
> + # associated mac address.
> + nics=$(grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc
> -l)
> + if [ "$nics" -eq 1 ] && ! grep -q "^lxc.network.hwaddr" $path/config;
> then
> + # see
> http://sourceforge.net/tracker/?func=detail&aid=3411497&group_id=163076&atid=826303
> + hwaddr="fe:$(dd if=/dev/urandom bs=8 count=1 2>/dev/null |od -t x8 |
> \
> + head -1 |awk '{print $2}' | cut -c1-10 |\
> + sed 's/\(..\)/\1:/g; s/.$//')"
> + echo "lxc.network.hwaddr = $hwaddr" >> $path/config
> + fi
> +
> cat <<EOF >> $path/config
> +
> lxc.tty = 4
> lxc.pts = 1024
> lxc.utsname = $hostname
> @@ -84,15 +113,6 @@ lxc.utsname = $hostname
> # When using LXC with apparmor, uncomment the next line to run unconfined:
> #lxc.aa_profile = unconfined
>
> -# network interface
> -lxc.network.name = eth0
> -lxc.network.type = veth
> -lxc.network.flags = up
> -# enable for bridging
> -#lxc.network.link = br0
> -#lxc.network.ipv4 = n.n.n.n
> -#lxc.network.ipv4.gateway = auto
> -
> # devices
> lxc.cgroup.devices.deny = a
> # /dev/null and zero
> --
> 1.8.1.2
>
>
> ------------------------------------------------------------------------------
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