Edit /etc/hosts

This script makes sure the hostname can be resolved through /etc/hosts
and adds names for all interfaces in the VM cluster.

Partial-Bug: 1312764
Implements: blueprint openstack-training-labs
Change-Id: Id35a9d698bf981ff960e7898b8bcb0a598b1b58c

labs/scripts/etc_hosts.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+TOP_DIR=$(cd $(dirname "$0")/.. && pwd)
+source "$TOP_DIR/config/paths"
+source "$LIB_DIR/functions.guest"
+
+indicate_current_auto
+
+exec_logfile
+
+HOST_NAME=$(hostname)
+HOST_FILE=/etc/hosts
+
+if ! grep -q "^[^#].*$HOST_NAME" $HOST_FILE; then
+    # No active entry for our hostname
+    HOST_IP=127.0.1.1
+    if grep -q "^$HOST_IP" $HOST_FILE; then
+        # Fix the entry for the IP address we want to use
+        sudo sed -i "s/^$HOST_IP.*/$HOST_IP $HOST_NAME/" $HOST_FILE
+    else
+        echo "$HOST_IP $HOST_NAME" | sudo tee -a $HOST_FILE
+    fi
+fi
+
+# Add entries for the rest of the OpenStack training-labs
+cat "$CONFIG_DIR/hosts.multi" | sudo tee -a /etc/hosts