[MM-16032] Add system ping endpoint health checks (#11267)

* Add system ping endpoint health checks

This change adds the option for additional server health checks
to be performed when the system ping endpoint is hit. An additional
field 'getserverstatus' is required to run the enhanced health
checks to ensure previous default ping behavior is not modified.

* Use snake_casing

model/client4.go

@@ -35,6 +35,7 @@ const (
 	STATUS                    = "status"
 	STATUS_OK                 = "OK"
 	STATUS_FAIL               = "FAIL"
+	STATUS_UNHEALTHY          = "UNHEALTHY"
 	STATUS_REMOVE             = "REMOVE"
 
 	CLIENT_DIR = "client"
@@ -2682,7 +2683,22 @@ func (c *Client4) GetPing() (string, *Response) {
 	r, err := c.DoApiGet(c.GetSystemRoute()+"/ping", "")
 	if r != nil && r.StatusCode == 500 {
 		defer r.Body.Close()
-		return "unhealthy", BuildErrorResponse(r, err)
+		return STATUS_UNHEALTHY, BuildErrorResponse(r, err)
+	}
+	if err != nil {
+		return "", BuildErrorResponse(r, err)
+	}
+	defer closeBody(r)
+	return MapFromJson(r.Body)["status"], BuildResponse(r)
+}
+
+// GetPingWithServerStatus will return ok if several basic server health checks
+// all psss successfully.
+func (c *Client4) GetPingWithServerStatus() (string, *Response) {
+	r, err := c.DoApiGet(c.GetSystemRoute()+"/ping?get_server_status=true", "")
+	if r != nil && r.StatusCode == 500 {
+		defer r.Body.Close()
+		return STATUS_UNHEALTHY, BuildErrorResponse(r, err)
 	}
 	if err != nil {
 		return "", BuildErrorResponse(r, err)