From 4e8f6d1923782e7aef863441f7c1434ca1029164 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9na=C3=AFc=20Huard?= <lhuard@amadeus.com>
Date: Wed, 20 May 2015 13:26:04 +0200
Subject: =?UTF-8?q?[libvirt=20cluster]=20Use=20net-dhcp-leases=20to=20find?=
 =?UTF-8?q?=20VMs=E2=80=99=20IPs?=
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Query libvirt’s DHCP leases rather than inspecting the host’s ARP cache
to find the VMs’ IPs.
---
 .../libvirt/openshift-cluster/tasks/launch_instances.yml     | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

(limited to 'playbooks')

diff --git a/playbooks/libvirt/openshift-cluster/tasks/launch_instances.yml b/playbooks/libvirt/openshift-cluster/tasks/launch_instances.yml
index 359d0b2f3..8bf1e84ee 100644
--- a/playbooks/libvirt/openshift-cluster/tasks/launch_instances.yml
+++ b/playbooks/libvirt/openshift-cluster/tasks/launch_instances.yml
@@ -58,23 +58,17 @@
     uri: '{{ libvirt_uri }}'
   with_items: instances
 
-- name: Collect MAC addresses of the VMs
-  shell: 'virsh -c {{ libvirt_uri }} dumpxml {{ item }} | xmllint --xpath "string(//domain/devices/interface/mac/@address)" -'
-  register: scratch_mac
-  with_items: instances
-
 - name: Wait for the VMs to get an IP
-  command: "egrep -c '{{ scratch_mac.results | oo_collect('stdout') | join('|') }}' /proc/net/arp"
-  ignore_errors: yes
+  shell: 'virsh net-dhcp-leases openshift-ansible | egrep -c ''{{ instances | join("|") }}'''
   register: nb_allocated_ips
   until: nb_allocated_ips.stdout == '{{ instances | length }}'
   retries: 30
   delay: 1
 
 - name: Collect IP addresses of the VMs
-  shell: "awk '/{{ item.stdout }}/ {print $1}' /proc/net/arp"
+  shell: 'virsh net-dhcp-leases openshift-ansible | awk ''$6 == "{{ item }}" {gsub(/\/.*/, "", $5); print $5}'''
   register: scratch_ip
-  with_items: scratch_mac.results
+  with_items: instances
 
 - set_fact:
     ips: "{{ scratch_ip.results | oo_collect('stdout') }}"
-- 
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