47 lines
1.5 KiB
Bash
47 lines
1.5 KiB
Bash
#!/bin/bash
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# on error exit
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set -e
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# set vlan parent interface
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INTERFACE=eth0
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# assign vlan ids via commandline parameter 1
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VLANS=$1
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if [[ -z "$VLANS" ]];then
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echo -e "No VLAN-IDs assigned through environment variable with name 'VLANS'!\nExit container."
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exit 1
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fi
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# build interface list with parent interface and vlan ids
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ALLVLANIF=$(echo -n $VLANS | sed -re "s/\b([0-9]+)/${INTERFACE}.\1/g")
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# get MTU of parent interface
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MTU=$(ip link show $INTERFACE | grep -Ei 'mtu \d+' | cut -d " " -f2)
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# cleanup non used vlan interfaces
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for VLAN in $(ls -1 /sys/class/net | grep -E "^${INTERFACE}\\." | grep -Ev "$(echo $ALLVLANIF | tr ' ' '|')") ;do
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echo "Deleting orphaned interface: $VLAN"
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ip link delete $VLAN
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done
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# for each vlan id
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for VLAN in $VLANS; do
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VLANIF="${INTERFACE}.$VLAN"
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# create vlan interface
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[[ ! -d "/sys/class/net/${VLANIF}" ]] && {
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echo "Creating interface ${VLANIF}"
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ip link add link $INTERFACE name "$VLANIF" mtu $MTU type vlan id $VLAN
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}
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echo "Bring up $VLANIF interface"
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ip link set "$VLANIF" up
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# starting DHCP client on interface
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[[ -f "/var/run/udhcpc.${VLANIF}.pid" ]] && {
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kill "$(cat "/var/run/udhcpc.${VLANIF}.pid")" >/dev/null
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rm "/var/run/udhcpc.${VLANIF}.pid"
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}
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echo "Starting dhcp client on ${VLANIF}"
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udhcpc -b -i $VLANIF -x hostname:"$HOSTNAME" -p "/var/run/udhcpc.${VLANIF}.pid"
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done
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echo "Starting mDNS repeater process ... "
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# run repeater on vlan interfaces
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exec /bin/mdns-repeater -f $ALLVLANIF
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