Support Nginx monitoring.

.github/workflows/skywalking.yaml

@@ -611,6 +611,8 @@ jobs:
           - name: Zipkin BanyanDB
             config: test/e2e-v2/cases/zipkin/banyandb/e2e.yaml
 
+          - name: Nginx
+            config: test/e2e-v2/cases/nginx/e2e.yaml
           - name: APISIX metrics
             config: test/e2e-v2/cases/apisix/otel-collector/e2e.yaml
           - name: Exporter Kafka

docs/en/changes/changes.md

@@ -42,6 +42,7 @@
 * Change the DataCarrier IF_POSSIBLE strategy to use ArrayBlockingQueue implementation.
 * Change the policy of the queue(DataCarrier) in the L1 metric aggregate worker to IF_POSSIBLE mode. 
 * Add self-observability metric `metrics_aggregator_abandon` to count the number of abandon metrics.
+* Support Nginx monitoring.
 
 #### UI
 

docs/en/setup/backend/backend-nginx-monitoring.md

@@ -0,0 +1,141 @@
+# Nginx monitoring
+## Nginx performance from nginx-lua-prometheus
+The [nginx-lua-prometheus](https://github.com/knyar/nginx-lua-prometheus) is a lua library that can be used with Nginx to collect metrics 
+and expose them on a separate web page. 
+To use this library, you will need Nginx with [lua-nginx-module](https://github.com/openresty/lua-nginx-module) or directly [OpenResty](https://openresty.org/).
+
+SkyWalking leverages OpenTelemetry Collector to transfer the metrics to [OpenTelemetry receiver](opentelemetry-receiver.md) and into the [Meter System](./../../concepts-and-designs/meter.md).
+
+### Data flow
+1. [nginx-lua-prometheus](https://github.com/knyar/nginx-lua-prometheus) collects metrics from Nginx and expose them to an endpoint.
+2. OpenTelemetry Collector fetches metrics from the endpoint expose above via Prometheus Receiver and pushes metrics to SkyWalking OAP Server via OpenTelemetry gRPC exporter.
+3. The SkyWalking OAP Server parses the expression with [MAL](../../concepts-and-designs/mal.md) to filter/calculate/aggregate and store the results.
+
+### Set up
+1. Collect Nginx metrics and expose the following four metrics by [nginx-lua-prometheus](https://github.com/knyar/nginx-lua-prometheus). For details on metrics definition, refer to [here](../../../../test/e2e-v2/cases/nginx/nginx.conf).
+- histogram: nginx_http_latency
+- gauge: nginx_http_connections
+- counter: nginx_http_size_bytes
+- counter: nginx_http_requests_total
+
+2. Set up [OpenTelemetry Collector ](https://opentelemetry.io/docs/collector/getting-started/#docker). For details on Prometheus Receiver in OpenTelemetry Collector, refer to [here](../../../../test/e2e-v2/cases/nginx/otel-collector-config.yaml).
+3. Config SkyWalking [OpenTelemetry receiver](opentelemetry-receiver.md).
+
+### Nginx Monitoring
+
+SkyWalking observes the status, payload, and latency of the Nginx server, which is cataloged as a `LAYER: Nginx` `Service` in the OAP and instances would be recognized as `LAYER: Nginx` `instance`.
+
+About `LAYER: Nginx` `endpoint`, it depends on how precision you want to monitor the nginx.
+We do not recommend expose every request path metrics, because it will cause explosion of metrics endpoint data.
+
+You can collect host metrics:
+```
+http {
+  log_by_lua_block {
+      metric_bytes:inc(tonumber(ngx.var.request_length), {"request", ngx.var.host})
+      metric_bytes:inc(tonumber(ngx.var.bytes_send), {"response", ngx.var.host})
+      metric_requests:inc(1, {ngx.var.status, ngx.var.host})
+      metric_latency:observe(tonumber(ngx.var.request_time), {ngx.var.host})
+  }
+}
+```
+or grouped urls and upstream metrics:
+```
+upstream backend {
+  server ip:port;
+}
+
+server {
+
+  location /test {
+    default_type application/json;
+    return 200  '{"code": 200, "message": "success"}';
+
+    log_by_lua_block {
+      metric_bytes:inc(tonumber(ngx.var.request_length), {"request", "/test/**"})
+      metric_bytes:inc(tonumber(ngx.var.bytes_send), {"response", "/test/**"})
+      metric_requests:inc(1, {ngx.var.status, "/test/**"})
+      metric_latency:observe(tonumber(ngx.var.request_time), {"/test/**"})
+    }
+  }
+
+  location /test_upstream {
+
+    proxy_pass http://backend;
+
+    log_by_lua_block {
+      metric_bytes:inc(tonumber(ngx.var.request_length), {"request", "upstream/backend"})
+      metric_bytes:inc(tonumber(ngx.var.bytes_send), {"response", "upstream/backend"})
+      metric_requests:inc(1, {ngx.var.status, "upstream/backend"})
+      metric_latency:observe(tonumber(ngx.var.request_time), {"upstream/backend"})
+    }
+  }
+}
+```
+
+#### Nginx Service Supported Metrics 
+| Monitoring Panel        | Unit | Metric Name                                                                                   | Catalog | Description                                          | Data Source                    |
+|-------------------------|------|-----------------------------------------------------------------------------------------------|---------|------------------------------------------------------|--------------------------------|
+| HTTP Request Trend      |      | meter_nginx_service_http_requests                                                             | Service | The increment rate of HTTP requests                  | nginx-lua-prometheus           |
+| HTTP Latency            | ms   | meter_nginx_service_http_latency                                                              | Service | The increment rate of the latency of HTTP requests   | nginx-lua-prometheus           |
+| HTTP Bandwidth          | KB   | meter_nginx_service_bandwidth                                                                 | Service | The increment rate of the bandwidth of HTTP requests | nginx-lua-prometheus           |
+| HTTP Connections        |      | meter_nginx_service_http_connections                                                          | Service | The avg number of the connections                    | nginx-lua-prometheus           |
+| HTTP Status Trend       |      | meter_nginx_service_http_status                                                               | Service | The increment rate of the status of HTTP requests    | nginx-lua-prometheus           |
+| HTTP Status 4xx Percent | %    | meter_nginx_service_http_4xx_requests_increment / meter_nginx_service_http_requests_increment | Service | The percentage of 4xx status of HTTP requests        | nginx-lua-prometheus           |
+| HTTP Status 5xx Percent | %    | meter_nginx_service_http_5xx_requests_increment / meter_nginx_service_http_requests_increment | Service | The percentage of 4xx status of HTTP requests        | nginx-lua-prometheus           |
+
+#### Nginx Instance Supported Metrics
+| Monitoring Panel          | Unit | Metric Name                                                                                     | Catalog  | Description                                          | Data Source                    |
+|---------------------------|------|-------------------------------------------------------------------------------------------------|----------|------------------------------------------------------|--------------------------------|
+| HTTP Request Trend        |      | meter_nginx_instance_http_requests                                                              | Instance | The increment rate of HTTP requests                  | nginx-lua-prometheus           |
+| HTTP Latency              | ms   | meter_nginx_instance_http_latency                                                               | Instance | The increment rate of the latency of HTTP requests   | nginx-lua-prometheus           |
+| HTTP Bandwidth            | KB   | meter_nginx_instance_bandwidth                                                                  | Instance | The increment rate of the bandwidth of HTTP requests | nginx-lua-prometheus           |
+| HTTP Connections          |      | meter_nginx_instance_http_connections                                                           | Instance | The avg number of the connections                    | nginx-lua-prometheus           |
+| HTTP Status Trend         |      | meter_nginx_instance_http_status                                                                | Instance | The increment rate of the status of HTTP requests    | nginx-lua-prometheus           |
+| HTTP Status 4xx Percent   | %    | meter_nginx_instance_http_4xx_requests_increment / meter_nginx_instance_http_requests_increment | Instance | The percentage of 4xx status of HTTP requests        | nginx-lua-prometheus           |
+| HTTP Status 5xx Percent   | %    | meter_nginx_instance_http_5xx_requests_increment / meter_nginx_instance_http_requests_increment | Instance | The percentage of 4xx status of HTTP requests        | nginx-lua-prometheus           |
+
+#### Nginx Endpoint Supported Metrics
+| Monitoring Panel        | Unit | Metric Name                                                                                     | Catalog  | Description                                          | Data Source          |
+|-------------------------|------|-------------------------------------------------------------------------------------------------|----------|------------------------------------------------------|----------------------|
+| HTTP Request Trend      |      | meter_nginx_endpoint_http_requests                                                              | Endpoint | The increment rate of HTTP requests                  | nginx-lua-prometheus |
+| HTTP Latency            | ms   | meter_nginx_endpoint_http_latency                                                               | Endpoint | The increment rate of the latency of HTTP requests   | nginx-lua-prometheus |
+| HTTP Bandwidth          | KB   | meter_nginx_endpoint_bandwidth                                                                  | Endpoint | The increment rate of the bandwidth of HTTP requests | nginx-lua-prometheus |
+| HTTP Status Trend       |      | meter_nginx_endpoint_http_status                                                                | Endpoint | The increment rate of the status of HTTP requests    | nginx-lua-prometheus |
+| HTTP Status 4xx Percent | %    | meter_nginx_endpoint_http_4xx_requests_increment / meter_nginx_endpoint_http_requests_increment | Endpoint | The percentage of 4xx status of HTTP requests        | nginx-lua-prometheus |
+| HTTP Status 5xx Percent | %    | meter_nginx_endpoint_http_5xx_requests_increment / meter_nginx_endpoint_http_requests_increment | Endpoint | The percentage of 4xx status of HTTP requests        | nginx-lua-prometheus |
+
+### Customizations
+You can customize your own metrics/expression/dashboard panel.
+
+The metrics definition and expression rules are found in `/config/otel-rules/nginx-service.yaml, /config/otel-rules/nginx-instance.yaml, /config/otel-rules/nginx-endpoint.yaml`.
+
+The Nginx dashboard panel configurations are found in `/config/ui-initialized-templates/nginx`.
+
+## Collect nginx access and error log
+SkyWalking leverages [fluentbit](https://fluentbit.io/) or other log agents for collecting access log and error log of Nginx.
+
+### Data flow
+1. fluentbit agent collects access log and error log from Nginx.
+2. fluentbit agent sends data to SkyWalking OAP Server using native meter APIs via HTTP.
+3. The SkyWalking OAP Server parses the expression with [LAL](../../concepts-and-designs/lal.md) to parse/extract and store the results.
+
+### Set up
+1. Install [fluentbit](https://docs.fluentbit.io/manual/installation/docker).
+2. Config fluent bit with fluent-bit.conf, refer to [here](../../../../test/e2e-v2/cases/nginx/fluent-bit.conf).
+
+### Error Log Monitoring
+Error Log monitoring provides monitoring of the error.log of the Nginx server.
+
+#### Supported Metrics
+| Monitoring Panel         | Metric Name                          | Catalog  | Description                               | Data Source |
+|--------------------------|--------------------------------------|----------|-------------------------------------------|-------------|
+| Service Error Log Count  | meter_nginx_service_error_log_count  | Service  | The count of log level of nginx error.log | fluent bit  |
+| Instance Error Log Count | meter_nginx_instance_error_log_count | Instance | The count of log level of nginx error.log | fluent bit  |
+
+### Customizations
+You can customize your own metrics/expression/dashboard panel.
+
+The log collect and analyse rules are found in `/config/lal/nginx.yaml`, `/config/log-mal-rules/nginx.yaml`.
+
+The Nginx dashboard panel configurations are found in `/config/ui-initialized-templates/nginx`.

docs/menu.yml

@@ -239,6 +239,8 @@ catalog:
             path: "/en/setup/service-agent/browser-agent"
           - name: "Gateway Monitoring"
             catalog:
+              - name: "Nginx Monitoring"
+                path: "/en/setup/backend/backend-nginx-monitoring"
               - name: "APISIX Monitoring"
                 path: "/en/setup/backend/backend-apisix-monitoring"
               - name: "AWS API Gateway"

oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/Layer.java

@@ -205,7 +205,12 @@ public enum Layer {
     /**
      * A scalable, fault-tolerant, and low-latency storage service optimized for real-time workloads.
      */
-    BOOKKEEPER(33, true);
+    BOOKKEEPER(33, true),
+
+    /**
+     * Nginx is an HTTP and reverse proxy server, a mail proxy server, and a generic TCP/UDP proxy server.
+     */
+    NGINX(34, true);
 
     private final int value;
     /**

oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/management/ui/template/UITemplateInitializer.java

@@ -72,6 +72,7 @@ public class UITemplateInitializer {
         Layer.KAFKA.name(),
         Layer.PULSAR.name(),
         Layer.BOOKKEEPER.name(),
+        Layer.NGINX.name(),
         "custom"
     };
     private final UITemplateManagementService uiTemplateManagementService;

oap-server/server-starter/src/main/resources/application.yml

@@ -119,7 +119,7 @@ core:
     searchableTracesTags: ${SW_SEARCHABLE_TAG_KEYS:http.method,http.status_code,rpc.status_code,db.type,db.instance,mq.queue,mq.topic,mq.broker}
     # Define the set of log tag keys, which should be searchable through the GraphQL.
     # The max length of key=value should be less than 256 or will be dropped.
-    searchableLogsTags: ${SW_SEARCHABLE_LOGS_TAG_KEYS:level}
+    searchableLogsTags: ${SW_SEARCHABLE_LOGS_TAG_KEYS:level,http.status_code}
     # Define the set of alarm tag keys, which should be searchable through the GraphQL.
     # The max length of key=value should be less than 256 or will be dropped.
     searchableAlarmTags: ${SW_SEARCHABLE_ALARM_TAG_KEYS:level}
@@ -245,8 +245,8 @@ agent-analyzer:
 log-analyzer:
   selector: ${SW_LOG_ANALYZER:default}
   default:
-    lalFiles: ${SW_LOG_LAL_FILES:envoy-als,mesh-dp,mysql-slowsql,pgsql-slowsql,redis-slowsql,k8s-service,default}
-    malFiles: ${SW_LOG_MAL_FILES:""}
+    lalFiles: ${SW_LOG_LAL_FILES:envoy-als,mesh-dp,mysql-slowsql,pgsql-slowsql,redis-slowsql,k8s-service,nginx,default}
+    malFiles: ${SW_LOG_MAL_FILES:"nginx"}
 
 event-analyzer:
   selector: ${SW_EVENT_ANALYZER:default}
@@ -340,7 +340,7 @@ receiver-otel:
   selector: ${SW_OTEL_RECEIVER:default}
   default:
     enabledHandlers: ${SW_OTEL_RECEIVER_ENABLED_HANDLERS:"otlp-metrics,otlp-logs"}
-    enabledOtelMetricsRules: ${SW_OTEL_RECEIVER_ENABLED_OTEL_METRICS_RULES:"apisix,k8s/*,istio-controlplane,vm,mysql/*,postgresql/*,oap,aws-eks/*,windows,aws-s3/*,aws-dynamodb/*,aws-gateway/*,redis/*,elasticsearch/*,rabbitmq/*,mongodb/*,kafka/*,pulsar/*,bookkeeper/*"}
+    enabledOtelMetricsRules: ${SW_OTEL_RECEIVER_ENABLED_OTEL_METRICS_RULES:"apisix,nginx/*,k8s/*,istio-controlplane,vm,mysql/*,postgresql/*,oap,aws-eks/*,windows,aws-s3/*,aws-dynamodb/*,aws-gateway/*,redis/*,elasticsearch/*,rabbitmq/*,mongodb/*,kafka/*,pulsar/*,bookkeeper/*"}
 
 receiver-zipkin:
   selector: ${SW_RECEIVER_ZIPKIN:-}

oap-server/server-starter/src/main/resources/lal/nginx.yaml

@@ -0,0 +1,60 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+rules:
+  - name: nginx-access-log
+    layer: NGINX
+    dsl: |
+      filter {
+        if (tag("LOG_KIND") == "NGINX_ACCESS_LOG") {
+          text {
+            regexp $/.+ \"(?<request>.+)\" (?<status>\d{3}) .+/$
+          }
+
+          extractor {
+            if (parsed.status) {
+              tag 'http.status_code': parsed.status
+            }
+          }
+
+          sink {
+          }
+        }
+      }
+  - name: nginx-error-log
+    layer: NGINX
+    dsl: |
+      filter {
+        if (tag("LOG_KIND") == "NGINX_ERROR_LOG") {
+          text {
+            regexp $/(?<time>\d{4}/\d{2}/\d{2} \d{2}:\d{2}:\d{2}) \[(?<level>.+)].*/$
+          }
+
+          extractor {
+            tag level: parsed.level
+            timestamp parsed.time as String, "yyyy/MM/dd HH:mm:ss"
+
+            metrics {
+              timestamp log.timestamp as Long
+              labels level: parsed.level, service: log.service, service_instance_id: log.serviceInstance
+              name "nginx_error_log_count"
+              value 1
+            }
+          }
+
+          sink {
+          }
+        }
+      }

oap-server/server-starter/src/main/resources/log-mal-rules/nginx.yaml

@@ -0,0 +1,36 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This will parse a textual representation of a duration. The formats
+# accepted are based on the ISO-8601 duration format {@code PnDTnHnMn.nS}
+# with days considered to be exactly 24 hours.
+# <p>
+# Examples:
+# <pre>
+#    "PT20.345S" -- parses as "20.345 seconds"
+#    "PT15M"     -- parses as "15 minutes" (where a minute is 60 seconds)
+#    "PT10H"     -- parses as "10 hours" (where an hour is 3600 seconds)
+#    "P2D"       -- parses as "2 days" (where a day is 24 hours or 86400 seconds)
+#    "P2DT3H4M"  -- parses as "2 days, 3 hours and 4 minutes"
+#    "P-6H3M"    -- parses as "-6 hours and +3 minutes"
+#    "-P6H3M"    -- parses as "-6 hours and -3 minutes"
+#    "-P-6H+3M"  -- parses as "+6 hours and -3 minutes"
+# </pre>
+metricPrefix: meter_nginx
+metricsRules:
+  - name: service_error_log_count
+    exp: nginx_error_log_count.sum(['level','service']).downsampling(SUM).service(['service'], Layer.NGINX)
+  - name: instance_error_log_count
+    exp: nginx_error_log_count.sum(['level','service','service_instance_id']).downsampling(SUM).instance(['service'],['service_instance_id'], Layer.NGINX)