Use same IP address for both boots and nginx (#43)

Signed-off-by: Michael Richard <michael.richard.ing@gmail.com>

## Description

This configures NGINX to listen on port 8080 and lets go the need to configure a second IP address on the host dedicated to NGINX.

## Why is this needed

Setting up a second IP address to host NGINX on the same host is not always easy, especially when running tinkerbell on network devices like switches. The second IP address adds a useless level of complexity. In the future, all the code required to identify the host operating system and configure the IP address could even be removed and left as a prerequisite, since the host is likely to have an IP address already configured.

## How Has This Been Tested?

The untouched vagrant_test.go test ran sucessfully.

## How are existing users impacted? What migration steps/scripts do we need?

Simply re-applying the docker-compose.yml should be sufficient (untested).
Additional firewall rules to allow traffic on port 8080 could be required depending on user's network configuration.

## Checklist:

I have:

- [ ] updated the documentation and/or roadmap (if required)
- [ ] added unit or e2e tests
- [ ] provided instructions on how to upgrade

deploy/docker-compose.yml

@@ -124,7 +124,7 @@ services:
       PACKET_VERSION: ${PACKET_VERSION:-ignored}
       ROLLBAR_TOKEN: ${ROLLBAR_TOKEN:-ignored}
       ROLLBAR_DISABLE: ${ROLLBAR_DISABLE:-1}
-      MIRROR_HOST: ${TINKERBELL_NGINX_IP:-127.0.0.1}
+      MIRROR_HOST: ${TINKERBELL_HOST_IP:-127.0.0.1}:8080
       DNS_SERVERS: 8.8.8.8
       PUBLIC_IP: $TINKERBELL_HOST_IP
       BOOTP_BIND: $TINKERBELL_HOST_IP:67
@@ -151,7 +151,7 @@ services:
     restart: unless-stopped
     tty: true
     ports:
-      - $TINKERBELL_NGINX_IP:80:80/tcp
+      - $TINKERBELL_HOST_IP:8080:80/tcp
     volumes:
       - ./state/webroot:/usr/share/nginx/html/
 

generate-envrc.sh

@@ -78,9 +78,6 @@ export TINKERBELL_CIDR=29
 # should be the second address.
 export TINKERBELL_HOST_IP=192.168.1.1
 
-# NGINX IP is used by provisioner to serve files required for iPXE boot
-export TINKERBELL_NGINX_IP=192.168.1.2
-
 # Tink server username and password
 export TINKERBELL_TINK_USERNAME=admin
 export TINKERBELL_TINK_PASSWORD="$tink_password"

setup.sh

@@ -59,17 +59,12 @@ get_distro_version() (
 )
 
 is_network_configured() (
-	# Require the provisioner interface have both the host and nginx IP
+	# Require the provisioner interface have the host IP
 	if ! ip addr show "$TINKERBELL_NETWORK_INTERFACE" |
 		grep -q "$TINKERBELL_HOST_IP"; then
 		return 1
 	fi
 
-	if ! ip addr show "$TINKERBELL_NETWORK_INTERFACE" |
-		grep -q "$TINKERBELL_NGINX_IP"; then
-		return 1
-	fi
-
 	return 0
 )
 
@@ -144,15 +139,13 @@ setup_networking_netplan() (
 		--arg interface "$TINKERBELL_NETWORK_INTERFACE" \
 		--arg cidr "$TINKERBELL_CIDR" \
 		--arg host_ip "$TINKERBELL_HOST_IP" \
-		--arg nginx_ip "$TINKERBELL_NGINX_IP" \
 		'{
   network: {
     renderer: "networkd",
     ethernets: {
       ($interface): {
         addresses: [
-          "\($host_ip)/\($cidr)",
+          "\($host_ip)/\($cidr)"
-          "\($nginx_ip)/\($cidr)"
         ]
       }
     }
@@ -179,33 +172,24 @@ setup_networking_ubuntu_legacy() (
 		echo ""
 		echo "$BLANK Then run the following commands:"
 		echo "$BLANK ip link set $TINKERBELL_NETWORK_INTERFACE nomaster"
-		echo "$BLANK ifdown $TINKERBELL_NETWORK_INTERFACE:0"
+		echo "$BLANK ifdown $TINKERBELL_NETWORK_INTERFACE"
-		echo "$BLANK ifdown $TINKERBELL_NETWORK_INTERFACE:1"
+		echo "$BLANK ifup $TINKERBELL_NETWORK_INTERFACE"
-		echo "$BLANK ifup $TINKERBELL_NETWORK_INTERFACE:0"
-		echo "$BLANK ifup $TINKERBELL_NETWORK_INTERFACE:1"
 		exit 1
 	else
 		generate_iface_config >>/etc/network/interfaces
 		ip link set "$TINKERBELL_NETWORK_INTERFACE" nomaster
-		ifdown "$TINKERBELL_NETWORK_INTERFACE:0"
+		ifdown "$TINKERBELL_NETWORK_INTERFACE"
-		ifdown "$TINKERBELL_NETWORK_INTERFACE:1"
+		ifup "$TINKERBELL_NETWORK_INTERFACE"
-		ifup "$TINKERBELL_NETWORK_INTERFACE:0"
-		ifup "$TINKERBELL_NETWORK_INTERFACE:1"
 	fi
 )
 
 generate_iface_config() (
 	cat <<EOF
 
-auto $TINKERBELL_NETWORK_INTERFACE:0
+auto $TINKERBELL_NETWORK_INTERFACE
-iface $TINKERBELL_NETWORK_INTERFACE:0 inet static
+iface $TINKERBELL_NETWORK_INTERFACE inet static
     address $TINKERBELL_HOST_IP/$TINKERBELL_CIDR
     pre-up sleep 4
-
-auto $TINKERBELL_NETWORK_INTERFACE:1
-iface $TINKERBELL_NETWORK_INTERFACE:1 inet static
-    address $TINKERBELL_NGINX_IP/$TINKERBELL_CIDR
-    pre-up sleep 4
 EOF
 )
 
@@ -221,10 +205,8 @@ ONBOOT=yes
 HWADDR=$HWADDRESS
 BOOTPROTO=static
 
-IPADDR0=$TINKERBELL_HOST_IP
+IPADDR=$TINKERBELL_HOST_IP
-PREFIX0=$TINKERBELL_CIDR
+PREFIX=$TINKERBELL_CIDR
-IPADDR1=$TINKERBELL_NGINX_IP
-PREFIX1=$TINKERBELL_CIDR
 EOF
 	)