From 143864c694fb3f44a28b805a17ba7a2f6bf9931f Mon Sep 17 00:00:00 2001
From: Vincent Untz <vuntz@suse.com>
Date: Sun, 07 Feb 2016 10:30:00 +0100
Subject: [PATCH] NovaEvacuate: Avoid initial useless message on stderr

When no evacuation has been done yet, we're spamming syslog with:

  Could not query value of evacuate: attribute does not exist

So let's just filter this out, since it's known to be expected on
initial setup.

As this requires a bashism, also move the script to use bash.

Change-Id: I3351919febc0ef0101e4a08ce6eb412e3c7cfc76
---

diff --git a/heartbeat/NovaEvacuate b/heartbeat/NovaEvacuate
index 319a747..f764bde 100644
--- a/heartbeat/NovaEvacuate
+++ b/heartbeat/NovaEvacuate
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 #
 # NovaCompute agent manages compute daemons.
@@ -220,7 +220,8 @@
     fi
 
     handle_evacuations $(
-        attrd_updater -n evacuate -A |
+        attrd_updater -n evacuate -A \
+            2> >(grep -v "attribute does not exist" 1>&2) |
             sed 's/ value=""/ value="no"/' |
             tr '="' '  ' |
             awk '{print $4" "$6}'