Include Go plugin sources in main repository. (#16997)

* Include Go plugin sources in main repository.

* Fix CI issues.

* Rename source tree.

10 files changed, 2855 insertions, 0 deletions

diff --git a/src/go/collectors/go.d.plugin/modules/solr/README.md b/src/go/collectors/go.d.plugin/modules/solr/README.md
new file mode 120000
index 0000000000..0bca1b31a6
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/solr/README.md
@@ -0,0 +1 @@
+integrations/solr.md
\ No newline at end of file
diff --git a/src/go/collectors/go.d.plugin/modules/solr/charts.go b/src/go/collectors/go.d.plugin/modules/solr/charts.go
new file mode 100644
index 0000000000..caaa72489b
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/solr/charts.go
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package solr
+
+import (
+	"github.com/netdata/go.d.plugin/agent/module"
+)
+
+type (
+	// Charts is an alias for module.Charts
+	Charts = module.Charts
+	// Dims is an alias for module.Dims
+	Dims = module.Dims
+)
+
+var charts = Charts{
+	{
+		ID:    "search_requests",
+		Title: "Search Requests",
+		Units: "requests/s",
+		Ctx:   "solr.search_requests",
+		Dims: Dims{
+			{ID: "query_requests_count", Name: "search", Algo: module.Incremental},
+		},
+	},
+	{
+		ID:    "search_errors",
+		Title: "Search Errors",
+		Units: "errors/s",
+		Ctx:   "solr.search_errors",
+		Dims: Dims{
+			{ID: "query_errors_count", Name: "errors", Algo: module.Incremental},
+		},
+	},
+	{
+		ID:    "search_errors_by_type",
+		Title: "Search Errors By Type",
+		Units: "errors/s",
+		Ctx:   "solr.search_errors_by_type",
+		Dims: Dims{
+			{ID: "query_clientErrors_count", Name: "client", Algo: module.Incremental},
+			{ID: "query_serverErrors_count", Name: "server", Algo: module.Incremental},
+			{ID: "query_timeouts_count", Name: "timeouts", Algo: module.Incremental},
+		},
+	},
+	{
+		ID:    "search_requests_processing_time",
+		Title: "Search Requests Processing Time",
+		Units: "milliseconds",
+		Ctx:   "solr.search_requests_processing_time",
+		Dims: Dims{
+			{ID: "query_totalTime_count", Name: "time", Algo: module.Incremental},
+		},
+	},
+	{
+		ID:    "search_requests_timings",
+		Title: "Search Requests Timings",
+		Units: "milliseconds",
+		Ctx:   "solr.search_requests_timings",
+		Dims: Dims{
+			{ID: "query_requestTimes_min_ms", Name: "min", Div: 1000000},
+			{ID: "query_requestTimes_median_ms", Name: "median", Div: 1000000},
+			{ID: "query_requestTimes_mean_ms", Name: "mean", Div: 1000000},
+			{ID: "query_requestTimes_max_ms", Name: "max", Div: 1000000},
+		},
+	},
+	{
+		ID:    "search_requests_processing_time_percentile",
+		Title: "Search Requests Processing Time Percentile",
+		Units: "milliseconds",
+		Ctx:   "solr.search_requests_processing_time_percentile",
+		Dims: Dims{
+			{ID: "query_requestTimes_p75_ms", Name: "p75", Div: 1000000},
+			{ID: "query_requestTimes_p95_ms", Name: "p95", Div: 1000000},
+			{ID: "query_requestTimes_p99_ms", Name: "p99", Div: 1000000},
+			{ID: "query_requestTimes_p999_ms", Name: "p999", Div: 1000000},
+		},
+	},
+	{
+		ID:    "update_requests",
+		Title: "Update Requests",
+		Units: "requests/s",
+		Ctx:   "solr.update_requests",
+		Dims: Dims{
+			{ID: "update_requests_count", Name: "update", Algo: module.Incremental},
+		},
+	},
+	{
+		ID:    "update_errors",
+		Title: "Update Errors",
+		Units: "errors/s",
+		Ctx:   "solr.update_errors",
+		Dims: Dims{
+			{ID: "update_errors_count", Name: "errors", Algo: module.Incremental},
+		},
+	},
+	{
+		ID:    "update_errors_by_type",
+		Title: "Update Errors By Type",
+		Units: "errors/s",
+		Ctx:   "solr.update_errors_by_type",
+		Dims: Dims{
+			{ID: "update_clientErrors_count", Name: "client", Algo: module.Incremental},
+			{ID: "update_serverErrors_count", Name: "server", Algo: module.Incremental},
+			{ID: "update_timeouts_count", Name: "timeouts", Algo: module.Incremental},
+		},
+	},
+	{
+		ID:    "update_requests_processing_time",
+		Title: "Update Requests Processing Time",
+		Units: "milliseconds",
+		Ctx:   "solr.update_requests_processing_time",
+		Dims: Dims{
+			{ID: "update_totalTime_count", Name: "time", Algo: module.Incremental},
+		},
+	},
+	{
+		ID:    "update_requests_timings",
+		Title: "Update Requests Timings",
+		Units: "milliseconds",
+		Ctx:   "solr.update_requests_timings",
+		Dims: Dims{
+			{ID: "update_requestTimes_min_ms", Name: "min", Div: 1000000},
+			{ID: "update_requestTimes_median_ms", Name: "median", Div: 1000000},
+			{ID: "update_requestTimes_mean_ms", Name: "mean", Div: 1000000},
+			{ID: "update_requestTimes_max_ms", Name: "max", Div: 1000000},
+		},
+	},
+	{
+		ID:    "update_requests_processing_time_percentile",
+		Title: "Update Requests Processing Time Percentile",
+		Units: "milliseconds",
+		Ctx:   "solr.update_requests_processing_time_percentile",
+		Dims: Dims{
+			{ID: "update_requestTimes_p75_ms", Name: "p75", Div: 1000000},
+			{ID: "update_requestTimes_p95_ms", Name: "p95", Div: 1000000},
+			{ID: "update_requestTimes_p99_ms", Name: "p99", Div: 1000000},
+			{ID: "update_requestTimes_p999_ms", Name: "p999", Div: 1000000},
+		},
+	},
+}
diff --git a/src/go/collectors/go.d.plugin/modules/solr/config_schema.json b/src/go/collectors/go.d.plugin/modules/solr/config_schema.json
new file mode 100644
index 0000000000..66dde58bf8
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/solr/config_schema.json
@@ -0,0 +1,59 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "go.d/solr job configuration schema.",
+  "type": "object",
+  "properties": {
+    "name": {
+      "type": "string"
+    },
+    "url": {
+      "type": "string"
+    },
+    "timeout": {
+      "type": [
+        "string",
+        "integer"
+      ]
+    },
+    "username": {
+      "type": "string"
+    },
+    "password": {
+      "type": "string"
+    },
+    "proxy_url": {
+      "type": "string"
+    },
+    "proxy_username": {
+      "type": "string"
+    },
+    "proxy_password": {
+      "type": "string"
+    },
+    "headers": {
+      "type": "object",
+      "additionalProperties": {
+        "type": "string"
+      }
+    },
+    "not_follow_redirects": {
+      "type": "boolean"
+    },
+    "tls_ca": {
+      "type": "string"
+    },
+    "tls_cert": {
+      "type": "string"
+    },
+    "tls_key": {
+      "type": "string"
+    },
+    "insecure_skip_verify": {
+      "type": "boolean"
+    }
+  },
+  "required": [
+    "name",
+    "url"
+  ]
+}
diff --git a/src/go/collectors/go.d.plugin/modules/solr/integrations/solr.md b/src/go/collectors/go.d.plugin/modules/solr/integrations/solr.md
new file mode 100644
index 0000000000..9afebfd17e
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/solr/integrations/solr.md
@@ -0,0 +1,223 @@
+<!--startmeta
+custom_edit_url: "https://github.com/netdata/go.d.plugin/edit/master/modules/solr/README.md"
+meta_yaml: "https://github.com/netdata/go.d.plugin/edit/master/modules/solr/metadata.yaml"
+sidebar_label: "Solr"
+learn_status: "Published"
+learn_rel_path: "Data Collection/Search Engines"
+most_popular: False
+message: "DO NOT EDIT THIS FILE DIRECTLY, IT IS GENERATED BY THE COLLECTOR'S metadata.yaml FILE"
+endmeta-->
+
+# Solr
+
+
+<img src="https://netdata.cloud/img/solr.svg" width="150"/>
+
+
+Plugin: go.d.plugin
+Module: solr
+
+<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" />
+
+## Overview
+
+This collector monitors Solr instances.
+
+
+
+
+This collector is supported on all platforms.
+
+This collector supports collecting metrics from multiple instances of this integration, including remote instances.
+
+
+### Default Behavior
+
+#### Auto-Detection
+
+This integration doesn't support auto-detection.
+
+#### Limits
+
+The default configuration for this integration does not impose any limits on data collection.
+
+#### Performance Impact
+
+The default configuration for this integration is not expected to impose a significant performance impact on the system.
+
+
+## Metrics
+
+Metrics grouped by *scope*.
+
+The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.
+
+
+
+### Per Solr instance
+
+These metrics refer to the entire monitored application.
+
+This scope has no labels.
+
+Metrics:
+
+| Metric | Dimensions | Unit |
+|:------|:----------|:----|
+| solr.search_requests | search | requests/s |
+| solr.search_errors | errors | errors/s |
+| solr.search_errors_by_type | client, server, timeouts | errors/s |
+| solr.search_requests_processing_time | time | milliseconds |
+| solr.search_requests_timings | min, median, mean, max | milliseconds |
+| solr.search_requests_processing_time_percentile | p75, p95, p99, p999 | milliseconds |
+| solr.update_requests | search | requests/s |
+| solr.update_errors | errors | errors/s |
+| solr.update_errors_by_type | client, server, timeouts | errors/s |
+| solr.update_requests_processing_time | time | milliseconds |
+| solr.update_requests_timings | min, median, mean, max | milliseconds |
+| solr.update_requests_processing_time_percentile | p75, p95, p99, p999 | milliseconds |
+
+
+
+## Alerts
+
+There are no alerts configured by default for this integration.
+
+
+## Setup
+
+### Prerequisites
+
+#### Solr version 6.4+
+
+This collector does not work with Solr versions lower 6.4.
+
+
+
+### Configuration
+
+#### File
+
+The configuration file name for this integration is `go.d/solr.conf`.
+
+
+You can edit the configuration file using the `edit-config` script from the
+Netdata [config directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md#the-netdata-config-directory).
+
+```bash
+cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
+sudo ./edit-config go.d/solr.conf
+```
+#### Options
+
+The following options can be defined globally: update_every, autodetection_retry.
+
+
+<details><summary>All options</summary>
+
+| Name | Description | Default | Required |
+|:----|:-----------|:-------|:--------:|
+| update_every | Data collection frequency. | 1 | no |
+| autodetection_retry | Recheck interval in seconds. Zero means no recheck will be scheduled. | 0 | no |
+| url | Server URL. | http://127.0.0.1:8983 | yes |
+| socket | Server Unix socket. |  | no |
+| address | Server address in IP:PORT format. |  | no |
+| fcgi_path | Status path. | /status | no |
+| timeout | HTTP request timeout. | 1 | no |
+| username | Username for basic HTTP authentication. |  | no |
+| password | Password for basic HTTP authentication. |  | no |
+| proxy_url | Proxy URL. |  | no |
+| proxy_username | Username for proxy basic HTTP authentication. |  | no |
+| proxy_password | Password for proxy basic HTTP authentication. |  | no |
+| method | HTTP request method. | GET | no |
+| body | HTTP request body. |  | no |
+| headers | HTTP request headers. |  | no |
+| not_follow_redirects | Redirect handling policy. Controls whether the client follows redirects. | no | no |
+| tls_skip_verify | Server certificate chain and hostname validation policy. Controls whether the client performs this check. | no | no |
+| tls_ca | Certification authority that the client uses when verifying the server's certificates. |  | no |
+| tls_cert | Client TLS certificate. |  | no |
+| tls_key | Client TLS key. |  | no |
+
+</details>
+
+#### Examples
+
+##### Basic
+
+An example configuration.
+
+<details><summary>Config</summary>
+
+```yaml
+jobs:
+  - name: local
+  url: http://localhost:8983
+
+```
+</details>
+
+##### Basic HTTP auth
+
+Local Solr instance with basic HTTP authentication.
+
+<details><summary>Config</summary>
+
+```yaml
+jobs:
+  - name: local
+    url: http://localhost:8983
+    username: foo
+    password: bar
+
+```
+</details>
+
+##### Multi-instance
+
+> **Note**: When you define multiple jobs, their names must be unique.
+
+Local and remote instances.
+
+
+<details><summary>Config</summary>
+
+```yaml
+jobs:
+  - name: local
+    url: http://localhost:8983
+
+  - name: remote
+    url: http://203.0.113.10:8983
+
+```
+</details>
+
+
+
+## Troubleshooting
+
+### Debug Mode
+
+To troubleshoot issues with the `solr` collector, run the `go.d.plugin` with the debug option enabled. The output
+should give you clues as to why the collector isn't working.
+
+- Navigate to the `plugins.d` directory, usually at `/usr/libexec/netdata/plugins.d/`. If that's not the case on
+  your system, open `netdata.conf` and look for the `plugins` setting under `[directories]`.
+
+  ```bash
+  cd /usr/libexec/netdata/plugins.d/
+  ```
+
+- Switch to the `netdata` user.
+
+  ```bash
+  sudo -u netdata -s
+  ```
+
+- Run the `go.d.plugin` to debug the collector:
+
+  ```bash
+  ./go.d.plugin -d -m solr
+  ```
+
+
diff --git a/src/go/collectors/go.d.plugin/modules/solr/metadata.yaml b/src/go/collectors/go.d.plugin/modules/solr/metadata.yaml
new file mode 100644
index 0000000000..066744f634
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/solr/metadata.yaml
@@ -0,0 +1,268 @@
+plugin_name: go.d.plugin
+modules:
+  - meta:
+      id: collector-go.d.plugin-solr
+      plugin_name: go.d.plugin
+      module_name: solr
+      monitored_instance:
+        name: Solr
+        link: https://lucene.apache.org/solr/
+        icon_filename: solr.svg
+        categories:
+          - data-collection.search-engines
+      keywords:
+        - solr
+      related_resources:
+        integrations:
+          list: []
+      info_provided_to_referring_integrations:
+        description: ""
+      most_popular: false
+    overview:
+      data_collection:
+        metrics_description: |
+          This collector monitors Solr instances.
+        method_description: ""
+      supported_platforms:
+        include: []
+        exclude: []
+      multi_instance: true
+      additional_permissions:
+        description: ""
+      default_behavior:
+        auto_detection:
+          description: ""
+        limits:
+          description: ""
+        performance_impact:
+          description: ""
+    setup:
+      prerequisites:
+        list:
+          - title: Solr version 6.4+
+            description: |
+              This collector does not work with Solr versions lower 6.4.
+      configuration:
+        file:
+          name: go.d/solr.conf
+        options:
+          description: |
+            The following options can be defined globally: update_every, autodetection_retry.
+          folding:
+            title: All options
+            enabled: true
+          list:
+            - name: update_every
+              description: Data collection frequency.
+              default_value: 1
+              required: false
+            - name: autodetection_retry
+              description: Recheck interval in seconds. Zero means no recheck will be scheduled.
+              default_value: 0
+              required: false
+            - name: url
+              description: Server URL.
+              default_value: http://127.0.0.1:8983
+              required: true
+            - name: socket
+              description: Server Unix socket.
+              default_value: ""
+              required: false
+            - name: address
+              description: Server address in IP:PORT format.
+              default_value: ""
+              required: false
+            - name: fcgi_path
+              description: Status path.
+              default_value: /status
+              required: false
+            - name: timeout
+              description: HTTP request timeout.
+              default_value: 1
+              required: false
+            - name: username
+              description: Username for basic HTTP authentication.
+              default_value: ""
+              required: false
+            - name: password
+              description: Password for basic HTTP authentication.
+              default_value: ""
+              required: false
+            - name: proxy_url
+              description: Proxy URL.
+              default_value: ""
+              required: false
+            - name: proxy_username
+              description: Username for proxy basic HTTP authentication.
+              default_value: ""
+              required: false
+            - name: proxy_password
+              description: Password for proxy basic HTTP authentication.
+              default_value: ""
+              required: false
+            - name: method
+              description: HTTP request method.
+              default_value: GET
+              required: false
+            - name: body
+              description: HTTP request body.
+              default_value: ""
+              required: false
+            - name: headers
+              description: HTTP request headers.
+              default_value: ""
+              required: false
+            - name: not_follow_redirects
+              description: Redirect handling policy. Controls whether the client follows redirects.
+              default_value: false
+              required: false
+            - name: tls_skip_verify
+              description: Server certificate chain and hostname validation policy. Controls whether the client performs this check.
+              default_value: false
+              required: false
+            - name: tls_ca
+              description: Certification authority that the client uses when verifying the server's certificates.
+              default_value: ""
+              required: false
+            - name: tls_cert
+              description: Client TLS certificate.
+              default_value: ""
+              required: false
+            - name: tls_key
+              description: Client TLS key.
+              default_value: ""
+              required: false
+        examples:
+          folding:
+            title: Config
+            enabled: true
+          list:
+            - name: Basic
+              description: An example configuration.
+              config: |
+                jobs:
+                  - name: local
+                  url: http://localhost:8983
+            - name: Basic HTTP auth
+              description: Local Solr instance with basic HTTP authentication.
+              config: |
+                jobs:
+                  - name: local
+                    url: http://localhost:8983
+                    username: foo
+                    password: bar
+            - name: Multi-instance
+              description: |
+                > **Note**: When you define multiple jobs, their names must be unique.
+                
+                Local and remote instances.
+              config: |
+                jobs:
+                  - name: local
+                    url: http://localhost:8983
+                
+                  - name: remote
+                    url: http://203.0.113.10:8983
+    troubleshooting:
+      problems:
+        list: []
+    alerts: []
+    metrics:
+      folding:
+        title: Metrics
+        enabled: false
+      description: ""
+      availability: []
+      scopes:
+        - name: global
+          description: These metrics refer to the entire monitored application.
+          labels: []
+          metrics:
+            - name: solr.search_requests
+              description: Search Requests
+              unit: requests/s
+              chart_type: line
+              dimensions:
+                - name: search
+            - name: solr.search_errors
+              description: Search Errors
+              unit: errors/s
+              chart_type: line
+              dimensions:
+                - name: errors
+            - name: solr.search_errors_by_type
+              description: Search Errors By Type
+              unit: errors/s
+              chart_type: line
+              dimensions:
+                - name: client
+                - name: server
+                - name: timeouts
+            - name: solr.search_requests_processing_time
+              description: Search Requests Processing Time
+              unit: milliseconds
+              chart_type: line
+              dimensions:
+                - name: time
+            - name: solr.search_requests_timings
+              description: Search Requests Timings
+              unit: milliseconds
+              chart_type: line
+              dimensions:
+                - name: min
+                - name: median
+                - name: mean
+                - name: max
+            - name: solr.search_requests_processing_time_percentile
+              description: Search Requests Processing Time Percentile
+              unit: milliseconds
+              chart_type: line
+              dimensions:
+                - name: p75
+                - name: p95
+                - name: p99
+                - name: p999
+            - name: solr.update_requests
+              description: Update Requests
+              unit: requests/s
+              chart_type: line
+              dimensions:
+                - name: search
+            - name: solr.update_errors
+              description: Update Errors
+              unit: errors/s
+              chart_type: line
+              dimensions:
+                - name: errors
+            - name: solr.update_errors_by_type
+              description: Update Errors By Type
+              unit: errors/s
+              chart_type: line
+              dimensions:
+                - name: client
+                - name: server
+                - name: timeouts
+            - name: solr.update_requests_processing_time
+              description: Update Requests Processing Time
+              unit: milliseconds
+              chart_type: line
+              dimensions:
+                - name: time
+            - name: solr.update_requests_timings
+              description: Update Requests Timings
+              unit: milliseconds
+              chart_type: line
+              dimensions:
+                - name: min
+                - name: median
+                - name: mean
+                - name: max
+            - name: solr.update_requests_processing_time_percentile
+              description: Update Requests Processing Time Percentile
+              unit: milliseconds
+              chart_type: line
+              dimensions:
+                - name: p75
+                - name: p95
+                - name: p99
+                - name: p999
diff --git a/src/go/collectors/go.d.plugin/modules/solr/parser.go b/src/go/collectors/go.d.plugin/modules/solr/parser.go
new file mode 100644
index 0000000000..c8a9eaa54a
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/solr/parser.go
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package solr
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"strings"
+)
+
+type count struct {
+	Count int64
+}
+
+type common struct {
+	Count        int64
+	MeanRate     float64 `json:"meanRate"`
+	MinRate1min  float64 `json:"1minRate"`
+	MinRate5min  float64 `json:"5minRate"`
+	MinRate15min float64 `json:"15minRate"`
+}
+
+type requestTimes struct {
+	Count        int64
+	MeanRate     float64 `json:"meanRate"`
+	MinRate1min  float64 `json:"1minRate"`
+	MinRate5min  float64 `json:"5minRate"`
+	MinRate15min float64 `json:"15minRate"`
+	MinMS        float64 `json:"min_ms"`
+	MaxMS        float64 `json:"max_ms"`
+	MeanMS       float64 `json:"mean_ms"`
+	MedianMS     float64 `json:"median_ms"`
+	StdDevMS     float64 `json:"stddev_ms"`
+	P75MS        float64 `json:"p75_ms"`
+	P95MS        float64 `json:"p95_ms"`
+	P99MS        float64 `json:"p99_ms"`
+	P999MS       float64 `json:"p999_ms"`
+}
+
+type coresMetrics struct {
+	Metrics map[string]map[string]json.RawMessage
+}
+
+func (s *Solr) parse(resp *http.Response) (map[string]int64, error) {
+	var cm coresMetrics
+	var metrics = make(map[string]int64)
+
+	if err := json.NewDecoder(resp.Body).Decode(&cm); err != nil {
+		return nil, err
+	}
+
+	if len(cm.Metrics) == 0 {
+		return nil, errors.New("unparsable data")
+	}
+
+	for core, data := range cm.Metrics {
+		coreName := core[10:]
+
+		if !s.cores[coreName] {
+			s.addCoreCharts(coreName)
+			s.cores[coreName] = true
+		}
+
+		if err := s.parseCore(coreName, data, metrics); err != nil {
+			return nil, err
+		}
+	}
+
+	return metrics, nil
+}
+
+func (s *Solr) parseCore(core string, data map[string]json.RawMessage, metrics map[string]int64) error {
+	var (
+		simpleCount  int64
+		count        count
+		common       common
+		requestTimes requestTimes
+	)
+
+	for metric, stats := range data {
+		parts := strings.Split(metric, ".")
+
+		if len(parts) != 3 {
+			continue
+		}
+
+		typ, handler, stat := strings.ToLower(parts[0]), parts[1], parts[2]
+
+		if handler == "updateHandler" {
+			// TODO:
+			continue
+		}
+
+		switch stat {
+		case "clientErrors", "errors", "serverErrors", "timeouts":
+			if err := json.Unmarshal(stats, &common); err != nil {
+				return err
+			}
+			metrics[format("%s_%s_%s_count", core, typ, stat)] += common.Count
+		case "requests", "totalTime":
+			var c int64
+			if s.version < 7.0 {
+				if err := json.Unmarshal(stats, &count); err != nil {
+					return err
+				}
+				c = count.Count
+			} else {
+				if err := json.Unmarshal(stats, &simpleCount); err != nil {
+					return err
+				}
+				c = simpleCount
+			}
+			metrics[format("%s_%s_%s_count", core, typ, stat)] += c
+		case "requestTimes":
+			if err := json.Unmarshal(stats, &requestTimes); err != nil {
+				return err
+			}
+			metrics[format("%s_%s_%s_count", core, typ, stat)] += requestTimes.Count
+			metrics[format("%s_%s_%s_min_ms", core, typ, stat)] += int64(requestTimes.MinMS * 1e6)
+			metrics[format("%s_%s_%s_mean_ms", core, typ, stat)] += int64(requestTimes.MeanMS * 1e6)
+			metrics[format("%s_%s_%s_median_ms", core, typ, stat)] += int64(requestTimes.MedianMS * 1e6)
+			metrics[format("%s_%s_%s_max_ms", core, typ, stat)] += int64(requestTimes.MaxMS * 1e6)
+			metrics[format("%s_%s_%s_p75_ms", core, typ, stat)] += int64(requestTimes.P75MS * 1e6)
+			metrics[format("%s_%s_%s_p95_ms", core, typ, stat)] += int64(requestTimes.P95MS * 1e6)
+			metrics[format("%s_%s_%s_p99_ms", core, typ, stat)] += int64(requestTimes.P99MS * 1e6)
+			metrics[format("%s_%s_%s_p999_ms", core, typ, stat)] += int64(requestTimes.P999MS * 1e6)
+		}
+	}
+
+	return nil
+}
+
+func (s *Solr) addCoreCharts(core string) {
+	charts := charts.Copy()
+
+	for _, chart := range *charts {
+		chart.ID = format("%s_%s", core, chart.ID)
+		chart.Fam = format("core %s", core)
+
+		for _, dim := range chart.Dims {
+			dim.ID = format("%s_%s", core, dim.ID)
+		}
+	}
+
+	_ = s.charts.Add(*charts...)
+
+}
+
+var format = fmt.Sprintf
diff --git a/src/go/collectors/go.d.plugin/modules/solr/solr.go b/src/go/collectors/go.d.plugin/modules/solr/solr.go
new file mode 100644
index 0000000000..57f2d7083b
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/solr/solr.go
@@ -0,0 +1,212 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package solr
+
+import (
+	_ "embed"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/netdata/go.d.plugin/pkg/web"
+
+	"github.com/netdata/go.d.plugin/agent/module"
+)
+
+//go:embed "config_schema.json"
+var configSchema string
+
+func init() {
+	module.Register("solr", module.Creator{
+		JobConfigSchema: configSchema,
+		Create:          func() module.Module { return New() },
+	})
+}
+
+const (
+	defaultURL         = "http://127.0.0.1:8983"
+	defaultHTTPTimeout = time.Second
+)
+
+const (
+	minSupportedVersion   = 6.4
+	coresHandlersURLPath  = "/solr/admin/metrics"
+	coresHandlersURLQuery = "group=core&prefix=UPDATE,QUERY&wt=json"
+	infoSystemURLPath     = "/solr/admin/info/system"
+	infoSystemURLQuery    = "wt=json"
+)
+
+type infoSystem struct {
+	Lucene struct {
+		Version string `json:"solr-spec-version"`
+	}
+}
+
+// New creates Solr with default values
+func New() *Solr {
+	config := Config{
+		HTTP: web.HTTP{
+			Request: web.Request{
+				URL: defaultURL,
+			},
+			Client: web.Client{
+				Timeout: web.Duration{Duration: defaultHTTPTimeout},
+			},
+		},
+	}
+	return &Solr{
+		Config: config,
+		cores:  make(map[string]bool),
+	}
+}
+
+// Config is the Solr module configuration.
+type Config struct {
+	web.HTTP `yaml:",inline"`
+}
+
+// Solr solr module
+type Solr struct {
+	module.Base
+	Config `yaml:",inline"`
+
+	cores   map[string]bool
+	client  *http.Client
+	version float64
+	charts  *Charts
+}
+
+func (s *Solr) doRequest(req *http.Request) (*http.Response, error) {
+	return s.client.Do(req)
+}
+
+// Cleanup makes cleanup
+func (Solr) Cleanup() {}
+
+// Init makes initialization
+func (s *Solr) Init() bool {
+	if s.URL == "" {
+		s.Error("URL not set")
+		return false
+	}
+
+	cli