grafana host parameterization

README.md

@@ -113,6 +113,9 @@ you must specify a host.
 - `--influx_port`: Port for your `influx_host` in the case where it is non-default.
 - `--influx_user`: Username for your `influx_host`, if you have one.
 - `--influx_pwd`: Password for your `influx_host`, if you have one.
+- `--grafana_host`: If you want to report your performance test metrics to some 
+  grafana, and it is a separate URL from the influxdb, you can specify it here. If you don't,
+  then the grafana URL will be the same as the influxdb URL.
 
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src/grasshopper/lib/configuration/gh_configuration.py

@@ -94,6 +94,14 @@ class ConfigurationConstants:
                 "help": "Password to connect to the influx host.",
             },
         },
+        "grafana_host": {
+            "opts": ["--grafana_host"],
+            "attrs": {
+                "action": "store",
+                "help": "The base grafana url. If not specified, will default to the "
+                "url that the influxdb/influx_host is set to.",
+            },
+        },
         "slack_webhook": {
             "opts": ["--slack_webhook"],
             "attrs": {

src/grasshopper/lib/fixtures/grasshopper_constants.py

@@ -17,6 +17,7 @@ class GrasshopperConstants:
         "influx_port",
         "influx_user",
         "influx_pwd",
+        "grafana_host",
         "shape_instance",
         "scenario_delay",
         "slack_webhook",

src/grasshopper/lib/grasshopper.py

@@ -67,6 +67,20 @@ def influx_configuration(self) -> dict[str, Optional[str]]:
 
         return configuration
 
+    @property
+    def grafana_configuration(self) -> dict[str, Optional[str]]:
+        """Extract the grafana related configuration items.
+
+        # TODO-DEPRECATED: move this code to the GHConfiguration object
+        """
+        configuration = {}
+
+        host = self.global_configuration.get(
+            "grafana_host", self.global_configuration.get("influx_host")
+        )
+        configuration["grafana_host"] = host
+        return configuration
+
     @staticmethod
     def launch_test(
         weighted_user_classes: Union[