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August 11, 2016 14:57
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Release all unused addresses of lxd-bridge DHCP
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#!/bin/sh | |
set -eu | |
# Set value of LXD_BRIDGE | |
. /etc/default/lxd-bridge | |
addr_list_file=/tmp/lxd-addr-list.`date +%Y-%m-%dT%H:%M:%S` | |
lxc list | awk '$4=="RUNNING"{print $6}' > $addr_list_file | |
cleanup() { | |
rm $addr_list_file | |
} | |
trap cleanup EXIT | |
awk -v addr_list_file=$addr_list_file -v interface=$LXD_BRIDGE '{ | |
mac_addr = $2 | |
addr = $3 | |
ret = system(sprintf("awk -v addr=%s '\''BEGIN{rc=1} $1==addr{rc=0} END{exit rc}'\'' %s", addr, addr_list_file)) | |
if (ret == 1) { | |
system(sprintf("sudo dhcp_release %s %s %s", interface, addr, mac_addr)) | |
} | |
}' /var/lib/lxd-bridge/dnsmasq.$LXD_BRIDGE.leases |
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