support prometheus Pushgateway, by eliminating timestamps; fixes #3526

2 files changed, 810 insertions, 668 deletions

diff --git a/web/netdata-swagger.json b/web/netdata-swagger.json
index a8ad536e57..768b6fd387 100644
--- a/web/netdata-swagger.json
+++ b/web/netdata-swagger.json
@@ -1,683 +1,771 @@
 {
-    "swagger": "2.0",
-    "info": {
-        "title": "NetData API",
-        "description": "Real time data collection and graphs...",
-        "version": "1.5.1_rolling"
+  "swagger": "2.0",
+  "info": {
+    "title": "NetData API",
+    "description": "Real time data collection and graphs...",
+    "version": "1.9.11_rolling"
+  },
+  "host": "registry.my-netdata.io",
+  "schemes": [
+    "http"
+  ],
+  "basePath": "/api/v1",
+  "produces": [
+    "application/json"
+  ],
+  "paths": {
+    "/charts": {
+      "get": {
+        "summary": "Get a list of all charts available at the server",
+        "description": "The charts endpoint returns a summary about all charts stored in the netdata server.",
+        "responses": {
+          "200": {
+            "description": "An array of charts",
+            "schema": {
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/chart_summary"
+              }
+            }
+          }
+        }
+      }
     },
-    "host": "registry.my-netdata.io",
-    "schemes": [
-        "http"
-    ],
-    "basePath": "/api/v1",
-    "produces": [
-        "application/json"
-    ],
-    "paths": {
-        "/charts": {
-            "get": {
-                "summary": "Get a list of all charts available at the server",
-                "description": "The charts endpoint returns a summary about all charts stored in the netdata server.",
-                "responses": {
-                    "200": {
-                        "description": "An array of charts",
-                        "schema": {
-                            "type": "array",
-                            "items": {
-                                "$ref": "#/definitions/chart_summary"
-                            }
-                        }
-                    }
-                }
+    "/chart": {
+      "get": {
+        "summary": "Get info about a specific chart",
+        "description": "The Chart endpoint returns detailed information about a chart.",
+        "parameters": [
+          {
+            "name": "chart",
+            "in": "query",
+            "description": "The id of the chart as returned by the /charts call.",
+            "required": true,
+            "type": "string",
+            "format": "as returned by /charts",
+            "default": "system.cpu"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "A javascript object with detailed information about the chart.",
+            "schema": {
+              "$ref": "#/definitions/chart"
             }
-        },
-        "/chart": {
-            "get": {
-                "summary": "Get info about a specific chart",
-                "description": "The Chart endpoint returns detailed information about a chart.",
-                "parameters": [
-                    {
-                        "name": "chart",
-                        "in": "query",
-                        "description": "The id of the chart as returned by the /charts call.",
-                        "required": true,
-                        "type": "string",
-                        "format": "as returned by /charts",
-                        "default": "system.cpu"
-                    }
-                ],
-                "responses": {
-                    "200": {
-                        "description": "A javascript object with detailed information about the chart.",
-                        "schema": {
-                            "$ref": "#/definitions/chart"
-                        }
-                    },
-                    "404": {
-                        "description": "No chart with the given id is found."
-                    }
-                }
+          },
+          "404": {
+            "description": "No chart with the given id is found."
+          }
+        }
+      }
+    },
+    "/data": {
+      "get": {
+        "summary": "Get collected data for a specific chart",
+        "description": "The Data endpoint returns data stored in the round robin database of a chart.\n",
+        "parameters": [
+          {
+            "name": "chart",
+            "in": "query",
+            "description": "The id of the chart as returned by the /charts call.",
+            "required": true,
+            "type": "string",
+            "format": "as returned by /charts",
+            "allowEmptyValue": false,
+            "default": "system.cpu"
+          },
+          {
+            "name": "dimension",
+            "in": "query",
+            "description": "zero, one or more dimension ids or names, as returned by the /chart call, separated with comma or pipe. Netdata simple patterns are supported.",
+            "required": false,
+            "type": "array",
+            "items": {
+              "type": "string",
+              "collectionFormat": "pipes",
+              "format": "as returned by /charts"
+            },
+            "allowEmptyValue": false
+          },
+          {
+            "name": "after",
+            "in": "query",
+            "description": "This parameter can either be an absolute timestamp specifying the starting point of the data to be returned, or a relative number of seconds (negative, relative to parameter: before). Netdata will assume it is a relative number if it is less that 3 years (in seconds). Netdata will adapt this parameter to the boundaries of the round robin database. The default is the beginning of the round robin database (i.e. by default netdata will attempt to return data for the entire database).",
+            "required": true,
+            "type": "number",
+            "format": "integer",
+            "allowEmptyValue": false,
+            "default": -600
+          },
+          {
+            "name": "before",
+            "in": "query",
+            "description": "This parameter can either be an absolute timestamp specifying the ending point of the data to be returned, or a relative number of seconds (negative), relative to the last collected timestamp. Netdata will assume it is a relative number if it is less than 3 years (in seconds). Netdata will adapt this parameter to the boundaries of the round robin database. The default is zero (i.e. the timestamp of the last value collected).",
+            "required": false,
+            "type": "number",
+            "format": "integer",
+            "default": 0
+          },
+          {
+            "name": "points",
+            "in": "query",
+            "description": "The number of points to be returned. If not given, or it is <= 0, or it is bigger than the points stored in the round robin database for this chart for the given duration, all the available collected values for the given duration will be returned.",
+            "required": true,
+            "type": "number",
+            "format": "integer",
+            "allowEmptyValue": false,
+            "default": 20
+          },
+          {
+            "name": "group",
+            "in": "query",
+            "description": "The grouping method. If multiple collected values are to be grouped in order to return fewer points, this parameters defines the method of grouping. methods supported \"min\", \"max\", \"average\", \"sum\", \"incremental-sum\". \"max\" is actually calculated on the absolute value collected (so it works for both positive and negative dimesions to return the most extreme value in either direction).",
+            "required": true,
+            "type": "string",
+            "enum": [
+              "min",
+              "max",
+              "average",
+              "sum",
+              "incremental-sum"
+            ],
+            "default": "average",
+            "allowEmptyValue": false
+          },
+          {
+            "name": "gtime",
+            "in": "query",
+            "description": "The grouping number of seconds. This is used in conjunction with group=average to change the units of metrics (ie when the data is per-second, setting gtime=60 will turn them to per-minute).",
+            "required": false,
+            "type": "number",
+            "format": "integer",
+            "allowEmptyValue": false,
+            "default": 0
+          },
+          {
+            "name": "format",
+            "in": "query",
+            "description": "The format of the data to be returned.",
+            "required": true,
+            "type": "string",
+            "enum": [
+              "json",
+              "jsonp",
+              "csv",
+              "tsv",
+              "tsv-excel",
+              "ssv",
+              "ssvcomma",
+              "datatable",
+              "datasource",
+              "html",
+              "array",
+              "csvjsonarray"
+            ],
+            "default": "json",
+            "allowEmptyValue": false
+          },
+          {
+            "name": "options",
+            "in": "query",
+            "description": "Options that affect data generation.",
+            "required": false,
+            "type": "array",
+            "items": {
+              "type": "string",
+              "enum": [
+                "nonzero",
+                "flip",
+                "jsonwrap",
+                "min2max",
+                "seconds",
+                "milliseconds",
+                "abs",
+                "absolute",
+                "absolute-sum",
+                "null2zero",
+                "objectrows",
+                "google_json",
+                "percentage",
+                "unaligned",
+                "match-ids",
+                "match-names"
+              ],
+              "collectionFormat": "pipes"
+            },
+            "default": [
+              "seconds",
+              "jsonwrap"
+            ],
+            "allowEmptyValue": false
+          },
+          {
+            "name": "callback",
+            "in": "query",
+            "description": "For JSONP responses, the callback function name.",
+            "required": false,
+            "type": "string",
+            "allowEmptyValue": true
+          },
+          {
+            "name": "filename",
+            "in": "query",
+            "description": "Add Content-Disposition: attachment; filename=<filename> header to the response, that will instruct the browser to save the response with the given filename.",
+            "required": false,
+            "type": "string",
+            "allowEmptyValue": true
+          },
+          {
+            "name": "tqx",
+            "in": "query",
+            "description": "[Google Visualization API](https://developers.google.com/chart/interactive/docs/dev/implementing_data_source?hl=en) formatted parameter.",
+            "required": false,
+            "type": "string",
+            "allowEmptyValue": true
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "The call was successful. The response should include the data.",
+            "schema": {
+              "$ref": "#/definitions/chart"
             }
+          },
+          "400": {
+            "description": "Bad request - the body will include a message stating what is wrong."
+          },
+          "404": {
+            "description": "No chart with the given id is found."
+          },
+          "500": {
+            "description": "Internal server error. This usually means the server is out of memory."
+          }
+        }
+      }
+    },
+    "/badge.svg": {
+      "get": {
+        "summary": "Generate a SVG image for a chart (or dimension)",
+        "description": "Successful responses are SVG images\n",
+        "parameters": [
+          {
+            "name": "chart",
+            "in": "query",
+            "description": "The id of the chart as returned by the /charts call.",
+            "required": true,
+            "type": "string",
+            "format": "as returned by /charts",
+            "allowEmptyValue": false,
+            "default": "system.cpu"
+          },
+          {
+            "name": "alarm",
+            "in": "query",
+            "description": "the name of an alarm linked to the chart",
+            "required": false,
+            "type": "string",
+            "format": "any text",
+            "allowEmptyValue": true
+          },
+          {
+            "name": "dimension",
+            "in": "query",
+            "description": "zero, one or more dimension ids, as returned by the /chart call.",
+            "required": false,
+            "type": "array",
+            "items": {
+              "type": "string",
+              "collectionFormat": "pipes",
+              "format": "as returned by /charts"
+            },
+            "allowEmptyValue": false
+          },
+          {
+            "name": "after",
+            "in": "query",
+            "description": "This parameter can either be an absolute timestamp specifying the starting point of the data to be returned, or a relative number of seconds, to the last collected timestamp. Netdata will assume it is a relative number if it is smaller than the duration of the round robin database for this chart. So, if the round robin database is 3600 seconds, any value from -3600 to 3600 will trigger relative arithmetics. Netdata will adapt this parameter to the boundaries of the round robin database.",
+            "required": true,
+            "type": "number",
+            "format": "integer",
+            "allowEmptyValue": false,
+            "default": -600
+          },
+          {
+            "name": "before",
+            "in": "query",
+            "description": "This parameter can either be an absolute timestamp specifying the ending point of the data to be returned, or a relative number of seconds, to the last collected timestamp. Netdata will assume it is a relative number if it is smaller than the duration of the round robin database for this chart. So, if the round robin database is 3600 seconds, any value from -3600 to 3600 will trigger relative arithmetics. Netdata will adapt this parameter to the boundaries of the round robin database.",
+            "required": false,
+            "type": "number",
+            "format": "integer",
+            "default": 0
+          },
+          {
+            "name": "group",
+            "in": "query",
+            "description": "The grouping method. If multiple collected values are to be grouped in order to return fewer points, this parameters defines the method of grouping. methods are supported \"min\", \"max\", \"average\", \"sum\", \"incremental-sum\". \"max\" is actually calculated on the absolute value collected (so it works for both positive and negative dimesions to return the most extreme value in either direction).",
+            "required": true,
+            "type": "string",
+            "enum": [
+              "min",
+              "max",
+              "average",
+              "sum",
+              "incremental-sum"
+            ],
+            "default": "average",
+            "allowEmptyValue": false
+          },
+          {
+            "name": "options",
+            "in": "query",
+            "description": "Options that affect data generation.",
+            "required": false,
+            "type": "array",
+            "items": {
+              "type": "string",
+              "enum": [
+                "abs",
+                "absolute",
+                "display-absolute",
+                "absolute-sum",
+                "null2zero",
+                "percentage",
+                "unaligned"
+              ],
+              "collectionFormat": "pipes"
+            },
+            "default": [
+              "absolute"
+            ],
+            "allowEmptyValue": true
+          },
+          {
+            "name": "label",
+            "in": "query",
+            "description": "a text to be used as the label",
+            "required": false,
+            "type": "string",
+            "format": "any text",
+            "allowEmptyValue": true
+          },
+          {
+            "name": "units",
+            "in": "query",
+            "description": "a text to be used as the units",
+            "required": false,
+            "type": "string",
+            "format": "any text",
+            "allowEmptyValue": true
+          },
+          {
+            "name": "label_color",
+            "in": "query",
+            "description": "a color to be used for the background of the label",
+            "required": false,
+            "type": "string",
+            "format": "any text",
+            "allowEmptyValue": true
+          },
+          {
+            "name": "value_color",
+            "in": "query",
+            "description": "a color to be used for the background of the label. You can set multiple using a pipe with a condition each, like this: color<value|color>value|color:null The following operators are supported: >, <, >=, <=, =, :null (to check if no value exists).",
+            "required": false,
+            "type": "string",
+            "format": "any text",
+            "allowEmptyValue": true
+          },
+          {
+            "name": "multiply",
+            "in": "query",
+            "description": "multiply the value with this number for rendering it at the image (integer value required)",
+            "required": false,
+            "type": "number",
+            "format": "integer",
+            "allowEmptyValue": true
+          },
+          {
+            "name": "divide",
+            "in": "query",
+            "description": "divide the value with this number for rendering it at the image (integer value required)",
+            "required": false,
+            "type": "number",
+            "format": "integer",
+            "allowEmptyValue": true
+          },
+          {
+            "name": "scale",
+            "in": "query",
+            "description": "set the scale of the badge (greater or equal to 100)",
+            "required": false,
+            "type": "number",
+            "format": "integer",
+            "allowEmptyValue": true
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "The call was successful. The response should be an SVG image."
+          },
+          "400": {
+            "description": "Bad request - the body will include a message stating what is wrong."
+          },
+          "404": {
+            "description": "No chart with the given id is found."
+          },
+          "500": {
+            "description": "Internal server error. This usually means the server is out of memory."
+          }
+        }
+      }
+    },
+    "/allmetrics": {
+      "get": {
+        "summary": "Get a value of all the metrics maintained by netdata",
+        "description": "The charts endpoint returns the latest value of all charts and dimensions stored in the netdata server.",
+        "parameters": [
+          {
+            "name": "format",
+            "in": "query",
+            "description": "The format of the response to be returned",
+            "required": true,
+            "type": "string",
+            "enum": [
+              "shell",
+              "prometheus",
+              "prometheus_all_hosts",
+              "json"
+            ],
+            "default": "shell"
+          },
+          {
+            "name": "help",
+            "in": "query",
+            "description": "enable or disable HELP lines in prometheus output",
+            "required": false,
+            "type": "string",
+            "enum": [
+              "yes",
+              "no"
+            ],
+            "default": "no"
+          },
+          {
+            "name": "types",
+            "in": "query",
+            "description": "enable or disable TYPE lines in prometheus output",
+            "required": false,
+            "type": "string",
+            "enum": [
+              "yes",
+              "no"
+            ],
+            "default": "no"
+          },
+          {
+            "name": "timestamps",
+            "in": "query",
+            "description": "enable or disable timestamps in prometheus output",
+            "required": false,
+            "type": "string",
+            "enum": [
+              "yes",
+              "no"
+            ],
+            "default": "yes"
+          },
+          {
+            "name": "names",
+            "in": "query",
+            "description": "When enabled netdata will report dimension names. When disabled netdata will report dimension IDs. The default is controlled in netdata.conf.",
+            "required": false,
+            "type": "string",
+            "enum": [
+              "yes",
+              "no"
+            ],
+            "default": "yes"
+          },
+          {
+            "name": "server",
+            "in": "query",
+            "description": "Set a distinct name of the client querying prometheus metrics. Netdata will use the client IP if this is not set.",
+            "required": false,
+            "type": "string",
+            "format": "any text"
+          },
+          {
+            "name": "prefix",
+            "in": "query",
+            "description": "Prefix all prometheus metrics with this string.",
+            "required": false,
+            "type": "string",
+            "format": "any text"
+          },
+          {
+            "name": "data",
+            "in": "query",
+            "description": "Select the prometheus response data source. The default is controlled in netdata.conf",
+            "required": false,
+            "type": "string",
+            "enum": [
+              "as-collected",
+              "average",
+              "sum"
+            ],
+            "default": "average"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "All the metrics returned in the format requested"
+          },
+          "400": {
+            "description": "The format requested is not supported"
+          }
+        }
+      }
+    }
+  },
+  "definitions": {
+    "chart_summary": {
+      "type": "object",
+      "properties": {
+        "hostname": {
+          "type": "string",
+          "description": "The hostname of the netdata server."
         },
-        "/data": {
-            "get": {
-                "summary": "Get collected data for a specific chart",
-                "description": "The Data endpoint returns data stored in the round robin database of a chart.\n",
-                "parameters": [
-                    {
-                        "name": "chart",
-                        "in": "query",
-                        "description": "The id of the chart as returned by the /charts call.",
-                        "required": true,
-                        "type": "string",
-                        "format": "as returned by /charts",
-                        "allowEmptyValue": false,
-                        "default": "system.cpu"
-                    },
-                    {
-                        "name": "dimension",
-                        "in": "query",
-                        "description": "zero, one or more dimension ids, as returned by the /chart call.",
-                        "required": false,
-                        "type": "array",
-                        "items": {
-                            "type": "string",
-                            "collectionFormat": "pipes",
-                            "format": "as returned by /charts"
-                        },
-                        "allowEmptyValue": false
-                    },
-                    {
-                        "name": "after",
-                        "in": "query",
-                        "description": "This parameter can either be an absolute timestamp specifying the starting point of the data to be returned, or a relative number of seconds (negative, relative to parameter: before). Netdata will assume it is a relative number if it is less that 3 years (in seconds). Netdata will adapt this parameter to the boundaries of the round robin database. The default is the beginning of the round robin database (i.e. by default netdata will attempt to return data for the entire database).",
-                        "required": true,
-                        "type": "number",
-                        "format": "integer",
-                        "allowEmptyValue": false,
-                        "default": -600
-                    },
-                    {
-                        "name": "before",
-                        "in": "query",
-                        "description": "This parameter can either be an absolute timestamp specifying the ending point of the data to be returned, or a relative number of seconds (negative), relative to the last collected timestamp. Netdata will assume it is a relative number if it is less than 3 years (in seconds). Netdata will adapt this parameter to the boundaries of the round robin database. The default is zero (i.e. the timestamp of the last value collected).",
-                        "required": false,
-                        "type": "number",
-                        "format": "integer",
-                        "default": 0
-                    },
-                    {
-                        "name": "points",
-                        "in": "query",
-                        "description": "The number of points to be returned. If not given, or it is <= 0, or it is bigger than the points stored in the round robin database for this chart for the given duration, all the available collected values for the given duration will be returned.",
-                        "required": true,
-                        "type": "number",
-                        "format": "integer",
-                        "allowEmptyValue": false,
-                        "default": 20
-                    },
-                    {
-                        "name": "group",
-                        "in": "query",
-                        "description": "The grouping method. If multiple collected values are to be grouped in order to return fewer points, this parameters defines the method of grouping. methods supported \"min\", \"max\", \"average\", \"sum\", \"incremental-sum\". \"max\" is actually calculated on the absolute value collected (so it works for both positive and negative dimesions to return the most extreme value in either direction).",
-                        "required": true,
-                        "type": "string",
-                        "enum": [
-                            "min",
-                            "max",
-                            "average",
-                            "sum",
-                            "incremental-sum"
-                        ],
-                        "default": "average",
-                        "allowEmptyValue": false
-                    },
-                    {
-                        "name": "gtime",
-                        "in": "query",
-                        "description": "The grouping number of seconds. This is used in conjunction with group=average to change the units of metrics (ie when the data is per-second, setting gtime=60 will turn them to per-minute).",
-                        "required": false,
-                        "type": "number",
-                        "format": "integer",
-                        "allowEmptyValue": false,
-                        "default": 0
-                    },
-                    {
-                        "name": "format",
-                        "in": "query",
-                        "description": "The format of the data to be returned.",
-                        "required": true,
-                        "type": "string",
-                        "enum": [
-                            "json",
-                            "jsonp",
-                            "csv",
-                            "tsv",
-                            "tsv-excel",
-                            "ssv",
-                            "ssvcomma",
-                            "datatable",
-                            "datasource",
-                            "html",
-                            "array",
-                            "csvjsonarray"
-                        ],
-                        "default": "json",
-                        "allowEmptyValue": false
-                    },
-                    {
-                        "name": "options",
-                        "in": "query",
-                        "description": "Options that affect data generation.",
-                        "required": false,
-                        "type": "array",
-                        "items": {
-                            "type": "string",
-                            "enum": [
-                                "nonzero",
-                                "flip",
-                                "jsonwrap",
-                                "min2max",
-                                "seconds",
-                                "milliseconds",
-                                "abs",
-                                "absolute",
-                                "absolute-sum",
-                                "null2zero",
-                                "objectrows",
-                                "google_json",
-                                "percentage",
-                                "unaligned",
-                                "match-ids",
-                                "match-names"
-                            ],
-                            "collectionFormat": "pipes"
-                        },
-                        "default": [
-                            "seconds",
-                            "jsonwrap"
-                        ],
-                        "allowEmptyValue": false
-                    },
-                    {
-                        "name": "callback",
-                        "in": "query",
-                        "description": "For JSONP responses, the callback function name.",
-                        "required": false,
-                        "type": "string",
-                        "allowEmptyValue": true
-                    },
-                    {
-                        "name": "filename",
-                        "in": "query",
-                        "description": "Add Content-Disposition: attachment; filename=<filename> header to the response, that will instruct the browser to save the response with the given filename.",
-                        "required": false,
-                        "type": "string",
-                        "allowEmptyValue": true
-                    },
-                    {
-                        "name": "tqx",
-                        "in": "query",
-                        "description": "[Google Visualization API](https://developers.google.com/chart/interactive/docs/dev/implementing_data_source?hl=en) formatted parameter.",
-                        "required": false,
-                        "type": "string",
-                        "allowEmptyValue": true
-                    }
-                ],
-                "responses": {
-                    "200": {
-                        "description": "The call was successful. The response should include the data.",
-                        "schema": {
-                            "$ref": "#/definitions/chart"
-                        }
-                    },
-                    "400": {
-                        "description": "Bad request - the body will include a message stating what is wrong."
-                    },
-                    "404": {
-                        "description": "No chart with the given id is found."
-                    },
-                    "500": {
-                        "description": "Internal server error. This usually means the server is out of memory."
-                    }
-                }
-            }
+        "version": {
+          "type": "string",
+          "description": "netdata version of the server."
         },
-        "/badge.svg": {
-            "get": {
-                "summary": "Generate a SVG image for a chart (or dimension)",
-                "description": "Successful responses are SVG images\n",
-                "parameters": [
-                    {
-                        "name": "chart",
-                        "in": "query",
-                        "description": "The id of the chart as returned by the /charts call.",
-                        "required": true,
-                        "type": "string",
-                        "format": "as returned by /charts",
-                        "allowEmptyValue": false,
-                        "default": "system.cpu"
-                    },
-                    {
-                        "name": "alarm",
-                        "in": "query",
-                        "description": "the name of an alarm linked to the chart",
-                        "required": false,
-                        "type": "string",
-                        "format": "any text",
-                        "allowEmptyValue": true
-                    },
-                    {
-                        "name": "dimension",
-                        "in": "query",
-                        "description": "zero, one or more dimension ids or names, as returned by the /chart call, separated with comma or pipe. Netdata simple patterns are supported.",
-                        "required": false,
-                        "type": "array",
-                        "items": {
-                            "type": "string",
-                            "collectionFormat": "pipes",
-                            "format": "as returned by /charts"
-                        },
-                        "allowEmptyValue": false
-                    },
-                    {
-                        "name": "after",
-                        "in": "query",
-                        "description": "This parameter can either be an absolute timestamp specifying the starting point of the data to be returned, or a relative number of seconds, to the last collected timestamp. Netdata will assume it is a relative number if it is smaller than the duration of the round robin database for this chart. So, if the round robin database is 3600 seconds, any value from -3600 to 3600 will trigger relative arithmetics. Netdata will adapt this parameter to the boundaries of the round robin database.",
-                        "required": true,
-                        "type": "number",
-                        "format": "integer",
-                        "allowEmptyValue": false,
-                        "default": -600
-                    },
-                    {
-                        "name": "before",
-                        "in": "query",
-                        "description": "This parameter can either be an absolute timestamp specifying the ending point of the data to be returned, or a relative number of seconds, to the last collected timestamp. Netdata will assume it is a relative number if it is smaller than the duration of the round robin database for this chart. So, if the round robin database is 3600 seconds, any value from -3600 to 3600 will trigger relative arithmetics. Netdata will adapt this parameter to the boundaries of the round robin database.",
-                        "required": false,
-                        "type": "number",
-                        "format": "integer",
-                        "default": 0
-                    },
-                    {
-                        "name": "group",
-                        "in": "query",
-                        "description": "The grouping method. If multiple collected values are to be grouped in order to return fewer points, this parameters defines the method of grouping. methods are supported \"min\", \"max\", \"average\", \"sum\", \"incremental-sum\". \"max\" is actually calculated on the absolute value collected (so it works for both positive and negative dimesions to return the most extreme value in either direction).",
-                        "required": true,