Update network emulation documentation

docs/define_exp_env/index.rst

@@ -129,7 +129,7 @@ Schema
 Network
 =======
 
-``e2clab`` has the capacity to emulate network constraints between layers. Those constraints are defined in a single ``network.yaml`` configuration file.
+``e2clab`` has the capacity to emulate network constraints between layers, or any subset of services. Those constraints are defined in a single ``network.yaml`` configuration file.
 For each network, users may set parameters like:
 
 - delay

docs/define_exp_env/network.yaml

@@ -10,7 +10,7 @@ networks:
   rate: 1gbit
   loss: 1%
   symmetric: false
-- src: fog    # Required
+- src: fog.gateway.*    # Required
   dst: edge   # Required
   delay: 100ms
   rate: 50kbits

e2clab/schemas/network_schema.py

@@ -16,16 +16,17 @@ SCHEMA: dict = {
     "definitions": {
         "network": {
             "title": "Network emulation",
-            # "$$target": "#/definitons/network",
             "type": "object",
             "properties": {
                 SRC: {
-                    "description": "Source layer name",
+                    "description": "Source services name",
                     "type": "string",
+                    "examples": ["cloud", "cloud.kafka.*"],
                 },
                 DST: {
-                    "description": "Destination layer name",
+                    "description": "Destination services name",
                     "type": "string",
+                    "example": ["edge", "fog.gateway.*"],
                 },
                 DELAY: {
                     "description": "The delay to apply",