Workaround issue with mDNS where reboots effect hostname and broadcast.

Vagrantfile

@@ -8,15 +8,15 @@ boxes = YAML.load_file('./boxes.yaml')
 
 # API version
 VAGRANTFILE_API_VERSION = 2
+PROJECT_NAME = '/vagrant/' + File.basename(Dir.getwd)
+DEFAULT_BASE_BOX = 'centos/7'
 
 Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   boxes.each do |boxes|
     config.vm.define boxes['name'] do |srv|
       # OS and hostname
-      srv.vm.box = boxes['box']
-      if boxes['box_version']
-        srv.vm.box_version = boxes['box_version']
-      end
+      srv.vm.box = boxes['box'] ||= DEFAULT_BASE_BOX
+      srv.vm.box_url = boxes['box_url'] if boxes.key? 'box_url'
       srv.vm.hostname = boxes['name']
 
       # Networking.  By default a NAT interface is added.
@@ -39,19 +39,19 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
       srv.vm.synced_folder '.', '/vagrant', disabled: true
 
       srv.vm.provider 'virtualbox' do |vb|
-        vb.customize ['modifyvm', :id, '--cpus', boxes['cpus']]
-        vb.customize ['modifyvm', :id, '--cpuexecutioncap', boxes['cpu_execution_cap']]
-        vb.customize ['modifyvm', :id, '--memory', boxes['ram']]
-        vb.customize ['modifyvm', :id, '--name', boxes['name']]
-        vb.customize ['modifyvm', :id, '--description', boxes['description']]
-        vb.customize ['modifyvm', :id, '--groups', '/vagrant']
+        vb.customize ['modifyvm', :id, '--cpus', boxes['cpus']] if boxes.key? 'cpus'
+        vb.customize ['modifyvm', :id, '--cpuexecutioncap', boxes['cpu_execution_cap']] if boxes.key? 'cpuexecutioncap'
+        vb.customize ['modifyvm', :id, '--memory', boxes['ram']] if boxes.key? 'memory'
+        vb.customize ['modifyvm', :id, '--name', boxes['name']] if boxes.key? 'name'
+        vb.customize ['modifyvm', :id, '--description', boxes['description']] if boxes.key? 'description'
+        vb.customize ['modifyvm', :id, '--groups', PROJECT_NAME]
       end
 
       # Copy cloud-init files to tmp and provision
       if boxes['provision']
         srv.vm.provision :file, :source => boxes['provision']['meta-data'], :destination => '/tmp/vagrant/cloud-init/nocloud-net/meta-data'
         srv.vm.provision :file, :source => boxes['provision']['user-data'], :destination => '/tmp/vagrant/cloud-init/nocloud-net/user-data'
-        srv.vm.provision :shell, :path => boxes['provision']['cloud-init']
+        srv.vm.provision :shell, :path => boxes['provision']['cloud-init'], :args => boxes['name']
       end
     end
   end

boxes.yaml

@@ -2,10 +2,8 @@
 - name: haproxy.local
   description: haproxy node
   box: centos/7
-  cpus: 2
-  cpu_execution_cap: 75
+  cpus: 1
   ram: 1024
-  ssh_port: 2201
   provision:
     meta-data: ./cloud-init/nocloud-net/meta-data.yaml
     user-data: ./cloud-init/nocloud-net/user-data-haproxy.yaml
@@ -14,10 +12,8 @@
 - name: frontend.local
   description: frontend node
   box: centos/7
-  cpus: 2
-  cpu_execution_cap: 75
+  cpus: 1
   ram: 1024
-  ssh_port: 2202
   provision:
     meta-data: ./cloud-init/nocloud-net/meta-data.yaml
     user-data: ./cloud-init/nocloud-net/user-data-frontend.yaml

cloud-init/nocloud-net/user-data-frontend.yaml

@@ -1,9 +1,5 @@
 #cloud-config
 
-hostname: frontend
-fqdn: frontend.local
-manage_etc_hosts: true
-
 # set the locale
 locale: en_NZ.UTF-8
 

cloud-init/nocloud-net/user-data-haproxy.yaml

@@ -1,9 +1,5 @@
 #cloud-config
 
-hostname: haproxy
-fqdn: haproxy.local
-manage_etc_hosts: true
-
 # set the locale
 locale: en_NZ.UTF-8
 

scripts/cloud-init.sh

@@ -13,15 +13,34 @@ USER_DATA=/tmp/vagrant/cloud-init/nocloud-net/user-data
 # check if vagrant_provision has run before
 [[ -f $SUCCESS_INDICATOR ]] && exit 0
 
-# install required packages, including cloud-init
 yum install -y epel-release
 yum install -y cloud-init avahi nss-mdns
 
+# HACK: mDNS has an issue where other clients cannot resolve this host after vagrant halt/suspend
+hostname "$1"
+
 # enable Multicast DNS
 sed -i.bak -e 's/^hosts:.*/hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4/g' /etc/nsswitch.conf
-systemctl start avahi-daemon
+systemctl restart avahi-daemon
 systemctl enable avahi-daemon
 
+# HACK: mDNS has an issue where other clients cannot resolve this host after vagrant halt/suspend
+cat << EOF > /etc/NetworkManager/dispatcher.d/ifup-local
+#!/bin/sh
+
+case "\$1" in
+    eth*)
+        # Record event in /var/log/messages
+        logger "\$1 has come up... resetting hostname to $1 and restarting avahi-daemon.service - this is a hack"
+        hostname "$1"
+        systemctl restart avahi-daemon.service
+        ;;
+esac
+
+exit 0
+EOF
+chmod 700 /etc/NetworkManager/dispatcher.d/ifup-local
+
 # write cloud-init files
 mkdir -p $DATA_SOURCE
 [[ -f $META_DATA ]] && cp $META_DATA $DATA_SOURCE/ || exit 1