go.d.plugin: jsonschema allow array/object to be null (#17166)

55 files changed, 468 insertions, 117 deletions

diff --git a/src/go/collectors/go.d.plugin/modules/activemq/config_schema.json b/src/go/collectors/go.d.plugin/modules/activemq/config_schema.json
index c2563f3743..1a1a155963 100644
--- a/src/go/collectors/go.d.plugin/modules/activemq/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/activemq/config_schema.json
@@ -96,7 +96,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/apache/config_schema.json b/src/go/collectors/go.d.plugin/modules/apache/config_schema.json
index a5abd48729..981fa20877 100644
--- a/src/go/collectors/go.d.plugin/modules/apache/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/apache/config_schema.json
@@ -62,7 +62,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/bind/config_schema.json b/src/go/collectors/go.d.plugin/modules/bind/config_schema.json
index ca1ae71d9b..2a9d5ddd1c 100644
--- a/src/go/collectors/go.d.plugin/modules/bind/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/bind/config_schema.json
@@ -62,7 +62,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/cassandra/config_schema.json b/src/go/collectors/go.d.plugin/modules/cassandra/config_schema.json
index a32504ceb5..b64e3b5361 100644
--- a/src/go/collectors/go.d.plugin/modules/cassandra/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/cassandra/config_schema.json
@@ -62,7 +62,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/cockroachdb/config_schema.json b/src/go/collectors/go.d.plugin/modules/cockroachdb/config_schema.json
index 263e5d717d..2094e6f3f6 100644
--- a/src/go/collectors/go.d.plugin/modules/cockroachdb/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/cockroachdb/config_schema.json
@@ -62,7 +62,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/consul/config_schema.json b/src/go/collectors/go.d.plugin/modules/consul/config_schema.json
index 5fc9dcad89..8c4d39d94f 100644
--- a/src/go/collectors/go.d.plugin/modules/consul/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/consul/config_schema.json
@@ -68,7 +68,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/coredns/config_schema.json b/src/go/collectors/go.d.plugin/modules/coredns/config_schema.json
index 3edeaf79f3..bfb9616541 100644
--- a/src/go/collectors/go.d.plugin/modules/coredns/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/coredns/config_schema.json
@@ -33,12 +33,18 @@
       "per_server_stats": {
         "title": "Server selector",
         "description": "Configures collection of per-server statistics. If left empty, no stats will be collected. Matching is performed against the `server` label value.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "properties": {
           "includes": {
             "title": "Include",
             "description": "Include servers whose names match any of the specified inclusion [patterns](https://github.com/netdata/netdata/tree/master/src/go/collectors/go.d.plugin/pkg/matcher#readme).",
-            "type": "array",
+            "type": [
+              "array",
+              "null"
+            ],
             "items": {
               "title": "Server pattern",
               "type": "string"
@@ -48,7 +54,10 @@
           "excludes": {
             "title": "Exclude",
             "description": "Exclude servers whose names match any of the specified exclusion [patterns](https://github.com/netdata/netdata/tree/master/src/go/collectors/go.d.plugin/pkg/matcher#readme).",
-            "type": "array",
+            "type": [
+              "array",
+              "null"
+            ],
             "items": {
               "title": "Server pattern",
               "type": "string"
@@ -60,12 +69,18 @@
       "per_zone_stats": {
         "title": "Zone selector",
         "description": "Configures collection of per-zone statistics. If left empty, no stats will be collected. Matching is performed against the `zone` label value.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "properties": {
           "includes": {
             "title": "Include",
             "description": "Include zones whose names match any of the specified inclusion [patterns](https://github.com/netdata/netdata/tree/master/src/go/collectors/go.d.plugin/pkg/matcher#readme).",
-            "type": "array",
+            "type": [
+              "array",
+              "null"
+            ],
             "items": {
               "title": "Zone pattern",
               "type": "string"
@@ -75,7 +90,10 @@
           "excludes": {
             "title": "Exclude",
             "description": "Exclude zones whose names match any of the specified exclusion [patterns](https://github.com/netdata/netdata/tree/master/src/go/collectors/go.d.plugin/pkg/matcher#readme).",
-            "type": "array",
+            "type": [
+              "array",
+              "null"
+            ],
             "items": {
               "title": "Zone pattern",
               "type": "string"
@@ -116,7 +134,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/couchbase/config_schema.json b/src/go/collectors/go.d.plugin/modules/couchbase/config_schema.json
index bba52b5fa4..36fe08f061 100644
--- a/src/go/collectors/go.d.plugin/modules/couchbase/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/couchbase/config_schema.json
@@ -62,7 +62,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/couchdb/config_schema.json b/src/go/collectors/go.d.plugin/modules/couchdb/config_schema.json
index d015d29181..f7cd73d2ee 100644
--- a/src/go/collectors/go.d.plugin/modules/couchdb/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/couchdb/config_schema.json
@@ -73,7 +73,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/dnsdist/config_schema.json b/src/go/collectors/go.d.plugin/modules/dnsdist/config_schema.json
index 9361967f60..74e3d959ee 100644
--- a/src/go/collectors/go.d.plugin/modules/dnsdist/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/dnsdist/config_schema.json
@@ -62,7 +62,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/dnsquery/config_schema.json b/src/go/collectors/go.d.plugin/modules/dnsquery/config_schema.json
index 3725461bd9..8ad870a227 100644
--- a/src/go/collectors/go.d.plugin/modules/dnsquery/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/dnsquery/config_schema.json
@@ -37,7 +37,10 @@
       "record_types": {
         "title": "Record types",
         "description": "Types of DNS records to query for each server.",
-        "type": "array",
+        "type": [
+          "array",
+          "null"
+        ],
         "items": {
           "type": "string",
           "enum": [
@@ -63,7 +66,10 @@
       "servers": {
         "title": "Servers",
         "description": "List of DNS servers to query.",
-        "type": "array",
+        "type": [
+          "array",
+          "null"
+        ],
         "items": {
           "title": "DNS server",
           "description": "IP address or hostname of the DNS server.",
@@ -78,7 +84,10 @@
       "domains": {
         "title": "Domains",
         "description": "List of domains or subdomains to query. A random domain will be selected from this list at each iteration.",
-        "type": "array",
+        "type": [
+          "array",
+          "null"
+        ],
         "items": {
           "title": "Domain",
           "type": "string"
diff --git a/src/go/collectors/go.d.plugin/modules/docker_engine/config_schema.json b/src/go/collectors/go.d.plugin/modules/docker_engine/config_schema.json
index 3c43587813..2beb8e6449 100644
--- a/src/go/collectors/go.d.plugin/modules/docker_engine/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/docker_engine/config_schema.json
@@ -62,7 +62,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/dockerhub/config_schema.json b/src/go/collectors/go.d.plugin/modules/dockerhub/config_schema.json
index 9e52821e51..c791274f8d 100644
--- a/src/go/collectors/go.d.plugin/modules/dockerhub/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/dockerhub/config_schema.json
@@ -28,7 +28,10 @@
       "repositories": {
         "title": "Repositories",
         "description": "List of repositories to monitor.",
-        "type": "array",
+        "type": [
+          "array",
+          "null"
+        ],
         "items": {
           "title": "Name",
           "description": "The name of the repository.",
@@ -74,7 +77,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/elasticsearch/config_schema.json b/src/go/collectors/go.d.plugin/modules/elasticsearch/config_schema.json
index fbc9369cea..2930351054 100644
--- a/src/go/collectors/go.d.plugin/modules/elasticsearch/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/elasticsearch/config_schema.json
@@ -92,7 +92,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/envoy/config_schema.json b/src/go/collectors/go.d.plugin/modules/envoy/config_schema.json
index 1ba2c83ade..1fa73f6680 100644
--- a/src/go/collectors/go.d.plugin/modules/envoy/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/envoy/config_schema.json
@@ -62,7 +62,10 @@
       "headers": {
         "title": "Headers",
         "description": "Additional HTTP headers to include in the request.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "additionalProperties": {
           "type": "string"
         }
diff --git a/src/go/collectors/go.d.plugin/modules/example/config_schema.json b/src/go/collectors/go.d.plugin/modules/example/config_schema.json
index e22617038a..2f878d4ce7 100644
--- a/src/go/collectors/go.d.plugin/modules/example/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/example/config_schema.json
@@ -13,7 +13,10 @@
       },
       "charts": {
         "title": "Charts configuration",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "properties": {
           "type": {
             "title": "Chart type",
@@ -65,7 +68,10 @@
       },
       "hidden_charts": {
         "title": "Hidden charts configuration",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "properties": {
           "type": {
             "title": "Chart type",
diff --git a/src/go/collectors/go.d.plugin/modules/filecheck/config_schema.json b/src/go/collectors/go.d.plugin/modules/filecheck/config_schema.json
index 8a9a6f2086..bb9e4f4a9a 100644
--- a/src/go/collectors/go.d.plugin/modules/filecheck/config_schema.json
+++ b/src/go/collectors/go.d.plugin/modules/filecheck/config_schema.json
@@ -14,12 +14,18 @@
       "files": {
         "title": "File selector",
         "description": "Configuration for monitoring specific files. If left empy, no files will be monitored.",
-        "type": "object",
+        "type": [
+          "object",
+          "null"
+        ],
         "properties": {
           "include": {
             "title": "Include",
             "description": "Include files that match any of the specified include [patterns](https://golang.org/pkg/path/filepath/#Match).",
-            "type": "array",
+            "type": [
+              "array",
+              "null"
+            ],
             "items": {
               "title": "Filepath",
               "type": "string",
@@ -30,7 +36,10 @@
           "exclude": {
             "title": "Exclude",
             "description": "Exclude files that match any of the specified exclude [patterns](https://golang.org/pkg/path/filepath/#Match).",
-            "type": "array",
+            "type": [
+              "array",
+              "null"
+            ],
             "items": {
               "title": "Filepath",
               "type": "string",
@@ -52,12 +61,18 @@
       "dirs": {
         "title": "Directory selector