Fix README.md

Signed-off-by: Jan-Otto Kröpke <[email protected]>

README.md

@@ -143,7 +143,11 @@ In addition to static probes, configured via a [configuration file](CONFIGURATIO
 query parameter on the endpoint `/scrape/dynamic`.
 
 Most of the probe configuration can be configured via HTTP query parameter with the schema `<prober>.<setting>`, e.g. `http.method=POST`.
-HTTP query parameter supports only the configuration of top-level parameter. The configuration of sub level parameters needs to be passed as JSON document, e.g.
+HTTP query parameter supports only the configuration of top-level parameter. 
+
+If the value of the property is an array, the query parameter needs to be passed with an suffix `[]`, e.g.: `http.valid_http_versions[]`
+
+The configuration of sub level parameters needs to be passed as JSON document, e.g.
 `http.http_client_config={"tls_config":{"insecure_skip_verify":true}}` instead `http.http_client_config.tls_config.insecure_skip_verify=true`.
 
 ### Examples
@@ -158,19 +162,20 @@ scrape_configs:
     metrics_path: /probe/dynamic
     params:
       prober: [http]
-      http.method: ["POST"]
-      http.valid_http_versions: ["200", "204"]
+      http.method: ["OPTIONS"]
+      http.valid_http_versions[]: ["HTTP/2"]
+      http.valid_status_codes[]: ["204","301","405"]
       http.http_client_config: ['{"tls_config":{"insecure_skip_verify":true}}']
     static_configs:
       - targets:
-        - http://prometheus.io    # Target to probe with http.
+          - https://expired.badssl.com
     relabel_configs:
       - source_labels: [__address__]
         target_label: __param_target
       - source_labels: [__param_target]
         target_label: instance
       - target_label: __address__
-        replacement: 127.0.0.1:9115  # The blackbox exporter's real hostname:port.
+        replacement: 127.0.0.1:9115
 ```