Merge "net-conf: make bridge and interface name optional"

network/scripts/run-os-net-config.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
-# Note this script expects the following environment variables to be set
-# normally these are provided by the calling SoftwareConfig resource, but
-# they may also be set manually for testing
+# The following environment variables may be set to substitute in a
+# custom bridge or interface name.  Normally these are provided by the calling
+# SoftwareConfig resource, but they may also be set manually for testing.
 # $bridge_name : The bridge device name to apply
 # $interface_name : The interface name to apply
 #
@@ -113,8 +113,8 @@ if [ -n '$network_config' ]; then
     mkdir -p /etc/os-net-config
     # Note these variables come from the calling heat SoftwareConfig
     echo '$network_config' > /etc/os-net-config/config.json
-    sed -i "s/bridge_name/$bridge_name/" /etc/os-net-config/config.json
-    sed -i "s/interface_name/$interface_name/" /etc/os-net-config/config.json
+    sed -i "s/bridge_name/${bridge_name:-''}/" /etc/os-net-config/config.json
+    sed -i "s/interface_name/${interface_name:-''}/" /etc/os-net-config/config.json
 
     os-net-config -c /etc/os-net-config/config.json -v --detailed-exit-codes
     RETVAL=$?