Change hostname in collectd.conf

- Add code to match collectd hostname to the system's hostname.
   - Add reno for this bug fix.

Change-Id: I4e4138addc979436de04200ffdedc5f440351116
Closes-Bug: #1680013

devstack/libs/collectd

@@ -120,6 +120,10 @@ function adapt_collectd_conf {
         sudo -E mkdir -p "$COLLECTD_CONF_DIR"
     fi
 
+    # Configure collectd hostname
+    CONF_FILE=$(sudo find /etc -name "collectd.conf")
+    sudo sed -E -i 's|(^\|^#)Hostname.*$|Hostname "'$(hostname)'"|g' $CONF_FILE
+
     # Configure collectd-ceilometer-plugin
     if [[ "$COLLECTD_CEILOMETER_ENABLED" == "True" ]]; then
         sudo cp $COLLECTD_CEILOMETER_DIR/etc/collectd.conf.d/collectd-ceilometer-plugin.conf $COLLECTD_CONF_DIR/

releasenotes/notes/bug-1680013-3bba4f2f08f361a3.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - Fixes 'bug 1680013 https://bugs.launchpad.net/collectd-ceilometer-plugin/+bug/1680013'
+    Hostname in collectd is now set to match the system hostname.