[add] support files

pihole/readme.md

@@ -1,3 +1,42 @@
 # Pi Hole
 
-Text
+## Create docker network
+```
+docker network create -d macvlan \
+    --subnet=192.168.1.10/24 --gateway=192.168.1.1 \
+    --ip-range 192.168.1.59/28 \
+    -o parent=eth0 \
+    --aux-address="myserver=192.168.1.60" \
+    macvlan0
+```
+then
+
+1. sudo ip link set eth0 promisc on
+1. sudo ip link add macvlan-shim link eth0 type macvlan mode bridge
+1. sudo ip addr add 192.168.1.60/28 dev macvlan-shim
+1. sudo ip link set macvlan-shim up
+
+Check
+ ifconfig macvlan-shim
+
+## /usr/local/bin/pi-vlan.sh
+
+```
+#!/usr/bin/env bash
+ip link add macvlan-shim link eth0 type macvlan mode bridge
+ip addr add 192.168.1.60/28 dev macvlan-shim
+ip link set macvlan-shim up
+ifconfig macvlan-shim
+```
+## /etc/systemd/system/pi-vlan.service
+
+```
+[Unit]
+After=network.target
+
+[Service]
+ExecStart=/usr/local/bin/pi-vlan.sh
+
+[Install]
+WantedBy=default.target
+```