diff --git a/gateway-grafana-dashboard.json b/gateway-grafana-dashboard.json new file mode 100644 index 00000000..95defd61 --- /dev/null +++ b/gateway-grafana-dashboard.json @@ -0,0 +1,760 @@ +{ + "__inputs": [ + { + "name": "DS_PROMETHEUS", + "label": "prometheus", + "description": "", + "type": "datasource", + "pluginId": "prometheus", + "pluginName": "Prometheus" + } + ], + "__requires": [ + { + "type": "grafana", + "id": "grafana", + "name": "Grafana", + "version": "4.4.1" + }, + { + "type": "panel", + "id": "graph", + "name": "Graph", + "version": "" + }, + { + "type": "datasource", + "id": "prometheus", + "name": "Prometheus", + "version": "1.0.0" + }, + { + "type": "panel", + "id": "singlestat", + "name": "Singlestat", + "version": "" + } + ], + "annotations": { + "list": [] + }, + "editable": true, + "gnetId": null, + "graphTooltip": 0, + "hideControls": false, + "id": null, + "links": [], + "refresh": "1m", + "rows": [ + { + "collapse": false, + "height": 38, + "panels": [ + { + "cacheTimeout": null, + "colorBackground": false, + "colorValue": false, + "colors": [ + "rgba(245, 54, 54, 0.9)", + "rgba(191, 148, 112, 0.89)", + "rgba(50, 172, 45, 0.97)" + ], + "datasource": "${DS_PROMETHEUS}", + "description": "", + "format": "none", + "gauge": { + "maxValue": 100, + "minValue": 0, + "show": false, + "thresholdLabels": false, + "thresholdMarkers": true + }, + "hideTimeOverride": false, + "id": 28, + "interval": null, + "links": [], + "mappingType": 1, + "mappingTypes": [ + { + "name": "value to text", + "value": 1 + }, + { + "name": "range to text", + "value": 2 + } + ], + "maxDataPoints": 100, + "nullPointMode": "connected", + "nullText": null, + "postfix": "", + "postfixFontSize": "50%", + "prefix": "", + "prefixFontSize": "50%", + "rangeMaps": [ + { + "from": "null", + "text": "N/A", + "to": "null" + } + ], + "span": 4, + "sparkline": { + "fillColor": "rgba(31, 118, 189, 0.18)", + "full": false, + "lineColor": "rgb(31, 120, 193)", + "show": false + }, + "tableColumn": "Value", + "targets": [ + { + "expr": "sum(gateway_requests_seconds_count{job=~\"$gatewayService\"})", + "format": "time_series", + "interval": "", + "intervalFactor": 2, + "legendFormat": "", + "metric": "gateway_requests_seconds_count", + "refId": "A", + "step": 1200 + } + ], + "thresholds": "", + "timeFrom": null, + "timeShift": null, + "title": "Total Requests Served", + "type": "singlestat", + "valueFontSize": "80%", + "valueMaps": [ + { + "op": "=", + "text": "N/A", + "value": "null" + } + ], + "valueName": "current" + }, + { + "cacheTimeout": null, + "colorBackground": false, + "colorValue": false, + "colors": [ + "rgba(245, 54, 54, 0.9)", + "rgba(191, 148, 112, 0.89)", + "rgba(50, 172, 45, 0.97)" + ], + "datasource": "${DS_PROMETHEUS}", + "description": "", + "format": "none", + "gauge": { + "maxValue": 100, + "minValue": 0, + "show": false, + "thresholdLabels": false, + "thresholdMarkers": true + }, + "hideTimeOverride": false, + "id": 29, + "interval": null, + "links": [], + "mappingType": 1, + "mappingTypes": [ + { + "name": "value to text", + "value": 1 + }, + { + "name": "range to text", + "value": 2 + } + ], + "maxDataPoints": 100, + "nullPointMode": "connected", + "nullText": null, + "postfix": "", + "postfixFontSize": "50%", + "prefix": "", + "prefixFontSize": "50%", + "rangeMaps": [ + { + "from": "null", + "text": "N/A", + "to": "null" + } + ], + "span": 4, + "sparkline": { + "fillColor": "rgba(31, 118, 189, 0.18)", + "full": false, + "lineColor": "rgb(31, 120, 193)", + "show": false + }, + "tableColumn": "Value", + "targets": [ + { + "expr": "sum(gateway_requests_seconds_count{outcome=\"SUCCESSFUL\", job=~\"$gatewayService\"})", + "format": "time_series", + "interval": "", + "intervalFactor": 2, + "legendFormat": "", + "metric": "gateway_requests_seconds_count", + "refId": "A", + "step": 1200 + } + ], + "thresholds": "", + "timeFrom": null, + "timeShift": null, + "title": "Total Successful Requests Served", + "type": "singlestat", + "valueFontSize": "80%", + "valueMaps": [ + { + "op": "=", + "text": "N/A", + "value": "null" + } + ], + "valueName": "current" + }, + { + "cacheTimeout": null, + "colorBackground": false, + "colorValue": false, + "colors": [ + "rgba(245, 54, 54, 0.9)", + "rgba(191, 148, 112, 0.89)", + "rgba(50, 172, 45, 0.97)" + ], + "datasource": "${DS_PROMETHEUS}", + "description": "", + "format": "none", + "gauge": { + "maxValue": 100, + "minValue": 0, + "show": false, + "thresholdLabels": false, + "thresholdMarkers": true + }, + "hideTimeOverride": false, + "id": 30, + "interval": null, + "links": [], + "mappingType": 1, + "mappingTypes": [ + { + "name": "value to text", + "value": 1 + }, + { + "name": "range to text", + "value": 2 + } + ], + "maxDataPoints": 100, + "nullPointMode": "connected", + "nullText": null, + "postfix": "", + "postfixFontSize": "50%", + "prefix": "", + "prefixFontSize": "50%", + "rangeMaps": [ + { + "from": "null", + "text": "N/A", + "to": "null" + } + ], + "span": 4, + "sparkline": { + "fillColor": "rgba(31, 118, 189, 0.18)", + "full": false, + "lineColor": "rgb(31, 120, 193)", + "show": false + }, + "tableColumn": "Value", + "targets": [ + { + "expr": "sum(gateway_requests_seconds_count{outcome!=\"SUCCESSFUL\", job=~\"$gatewayService\"})", + "format": "time_series", + "interval": "", + "intervalFactor": 2, + "legendFormat": "", + "metric": "gateway_requests_seconds_count", + "refId": "A", + "step": 1200 + } + ], + "thresholds": "", + "timeFrom": null, + "timeShift": null, + "title": "Total Unsuccessful Requests Served", + "type": "singlestat", + "valueFontSize": "80%", + "valueMaps": [ + { + "op": "=", + "text": "N/A", + "value": "null" + } + ], + "valueName": "current" + } + ], + "repeat": null, + "repeatIteration": null, + "repeatRowId": null, + "showTitle": true, + "title": "Total Throughput", + "titleSize": "h2" + }, + { + "collapse": false, + "height": 250, + "panels": [ + { + "aliasColors": {}, + "bars": false, + "dashLength": 10, + "dashes": false, + "datasource": "${DS_PROMETHEUS}", + "fill": 1, + "id": 49, + "legend": { + "avg": false, + "current": false, + "max": false, + "min": false, + "show": false, + "total": false, + "values": false + }, + "lines": true, + "linewidth": 1, + "links": [], + "nullPointMode": "null", + "percentage": false, + "pointradius": 5, + "points": false, + "renderer": "flot", + "repeat": "routeId", + "seriesOverrides": [], + "spaceLength": 10, + "span": 4, + "stack": false, + "steppedLine": false, + "targets": [ + { + "expr": "gateway_requests_seconds_sum{routeId=~\"$routeId\", job=~\"$gatewayService\"}/gateway_requests_seconds_count{routeId=~\"$routeId\", job=~\"$gatewayService\"}", + "format": "time_series", + "interval": "", + "intervalFactor": 2, + "legendFormat": "{{ status }}", + "metric": "gateway_api_time_seconds_sum", + "refId": "A", + "step": 240 + } + ], + "thresholds": [], + "timeFrom": null, + "timeShift": null, + "title": "$routeId", + "tooltip": { + "shared": false, + "sort": 0, + "value_type": "individual" + }, + "type": "graph", + "xaxis": { + "buckets": null, + "mode": "time", + "name": null, + "show": true, + "values": [] + }, + "yaxes": [ + { + "format": "s", + "label": null, + "logBase": 1, + "max": null, + "min": null, + "show": true + }, + { + "format": "short", + "label": null, + "logBase": 1, + "max": null, + "min": null, + "show": true + } + ] + } + ], + "repeat": null, + "repeatIteration": null, + "repeatRowId": null, + "showTitle": true, + "title": "Request Processing Time", + "titleSize": "h2" + }, + { + "collapse": true, + "height": 250, + "panels": [ + { + "aliasColors": {}, + "bars": false, + "dashLength": 10, + "dashes": false, + "datasource": "${DS_PROMETHEUS}", + "description": "", + "fill": 1, + "id": 2, + "legend": { + "avg": false, + "current": false, + "max": false, + "min": false, + "show": false, + "total": false, + "values": false + }, + "lines": true, + "linewidth": 1, + "links": [], + "minSpan": null, + "nullPointMode": "null", + "percentage": false, + "pointradius": 5, + "points": false, + "renderer": "flot", + "repeat": "routeId", + "seriesOverrides": [], + "spaceLength": 10, + "span": 4, + "stack": true, + "steppedLine": false, + "targets": [ + { + "expr": "gateway_requests_seconds_count{outcome=\"SUCCESSFUL\", routeId=~\"$routeId\", job=~\"$gatewayService\"}", + "format": "time_series", + "hide": false, + "interval": "", + "intervalFactor": 2, + "legendFormat": "{{ job }} / {{ routeUri }}", + "metric": "gateway_requests_seconds_count", + "refId": "A", + "step": 240 + } + ], + "thresholds": [], + "timeFrom": null, + "timeShift": null, + "title": "$routeId Success API Gateway Calls", + "tooltip": { + "shared": false, + "sort": 0, + "value_type": "cumulative" + }, + "transparent": false, + "type": "graph", + "xaxis": { + "buckets": null, + "mode": "time", + "name": null, + "show": true, + "values": [] + }, + "yaxes": [ + { + "format": "short", + "label": null, + "logBase": 1, + "max": null, + "min": null, + "show": true + }, + { + "format": "short", + "label": null, + "logBase": 1, + "max": null, + "min": null, + "show": true + } + ] + } + ], + "repeat": null, + "repeatIteration": null, + "repeatRowId": null, + "showTitle": true, + "title": "Successful API Calls", + "titleSize": "h2" + }, + { + "collapse": true, + "height": 250, + "panels": [ + { + "aliasColors": {}, + "bars": false, + "dashLength": 10, + "dashes": false, + "datasource": "${DS_PROMETHEUS}", + "description": "", + "fill": 1, + "id": 3, + "legend": { + "avg": false, + "current": false, + "max": false, + "min": false, + "show": false, + "total": false, + "values": false + }, + "lines": true, + "linewidth": 1, + "links": [], + "nullPointMode": "null", + "percentage": false, + "pointradius": 5, + "points": false, + "renderer": "flot", + "repeat": "routeId", + "seriesOverrides": [], + "spaceLength": 10, + "span": 4, + "stack": true, + "steppedLine": false, + "targets": [ + { + "expr": "gateway_requests_seconds_count{outcome!=\"SUCCESSFUL\", routeId=~\"$routeId\", job=~\"$gatewayService\"}", + "format": "time_series", + "interval": "", + "intervalFactor": 2, + "legendFormat": "{{ job }} / {{ routeUri }}", + "metric": "gateway_requests_seconds_count", + "refId": "A", + "step": 240 + } + ], + "thresholds": [], + "timeFrom": null, + "timeShift": null, + "title": "$routeId Unsuccessful GW Calls", + "tooltip": { + "shared": false, + "sort": 0, + "value_type": "cumulative" + }, + "type": "graph", + "xaxis": { + "buckets": null, + "mode": "time", + "name": null, + "show": true, + "values": [] + }, + "yaxes": [ + { + "format": "short", + "label": null, + "logBase": 1, + "max": null, + "min": null, + "show": true + }, + { + "format": "short", + "label": null, + "logBase": 1, + "max": null, + "min": null, + "show": true + } + ] + } + ], + "repeat": null, + "repeatIteration": null, + "repeatRowId": null, + "showTitle": true, + "title": "Unsuccessful API Calls", + "titleSize": "h2" + }, + { + "collapse": false, + "height": 250, + "panels": [ + { + "aliasColors": {}, + "bars": false, + "dashLength": 10, + "dashes": false, + "datasource": "${DS_PROMETHEUS}", + "description": "", + "fill": 1, + "id": 35, + "legend": { + "avg": false, + "current": false, + "max": false, + "min": false, + "show": false, + "total": false, + "values": false + }, + "lines": true, + "linewidth": 1, + "links": [], + "nullPointMode": "null", + "percentage": false, + "pointradius": 5, + "points": false, + "renderer": "flot", + "repeat": "routeId", + "seriesOverrides": [], + "spaceLength": 10, + "span": 4, + "stack": false, + "steppedLine": false, + "targets": [ + { + "expr": "sum(gateway_requests_seconds_count{routeId=~\"$routeId\", job=~\"$gatewayService\"}) by (job, status)", + "format": "time_series", + "interval": "", + "intervalFactor": 2, + "legendFormat": "{{ job }} / {{ status }}", + "metric": "gateway_requests_seconds_count", + "refId": "A", + "step": 240 + } + ], + "thresholds": [], + "timeFrom": null, + "timeShift": null, + "title": "$routeId", + "tooltip": { + "shared": false, + "sort": 0, + "value_type": "individual" + }, + "type": "graph", + "xaxis": { + "buckets": null, + "mode": "time", + "name": null, + "show": true, + "values": [] + }, + "yaxes": [ + { + "format": "short", + "label": null, + "logBase": 1, + "max": null, + "min": null, + "show": true + }, + { + "format": "short", + "label": null, + "logBase": 1, + "max": null, + "min": null, + "show": true + } + ] + } + ], + "repeat": null, + "repeatIteration": null, + "repeatRowId": null, + "showTitle": true, + "title": "API / HTTP Status", + "titleSize": "h2" + } + ], + "schemaVersion": 14, + "style": "dark", + "tags": [], + "templating": { + "list": [ + { + "allValue": null, + "current": {}, + "datasource": "${DS_PROMETHEUS}", + "hide": 0, + "includeAll": true, + "label": "Gateway Service", + "multi": true, + "name": "gatewayService", + "options": [], + "query": "label_values(gateway_requests_seconds_count,job)", + "refresh": 1, + "regex": "", + "sort": 1, + "tagValuesQuery": "", + "tags": [], + "tagsQuery": "", + "type": "query", + "useTags": false + }, + { + "allValue": null, + "current": {}, + "datasource": "${DS_PROMETHEUS}", + "hide": 0, + "includeAll": true, + "label": "Route Id", + "multi": true, + "name": "routeId", + "options": [], + "query": "label_values(gateway_requests_seconds_count,routeId)", + "refresh": 1, + "regex": "", + "sort": 1, + "tagValuesQuery": "", + "tags": [], + "tagsQuery": "", + "type": "query", + "useTags": false + } + ] + }, + "time": { + "from": "now/d", + "to": "now" + }, + "timepicker": { + "refresh_intervals": [ + "5s", + "10s", + "30s", + "1m", + "5m", + "15m", + "30m", + "1h", + "2h", + "1d" + ], + "time_options": [ + "5m", + "15m", + "1h", + "6h", + "12h", + "24h", + "2d", + "7d", + "30d" + ] + }, + "timezone": "", + "title": "Spring Cloud Gateway", + "version": 1 +} diff --git a/images/gateway-grafana-dashboard.jpeg b/images/gateway-grafana-dashboard.jpeg new file mode 100644 index 00000000..7ba7f88b Binary files /dev/null and b/images/gateway-grafana-dashboard.jpeg differ diff --git a/multi/multi__global_filters.html b/multi/multi__global_filters.html index 2e29dc31..907421ed 100644 --- a/multi/multi__global_filters.html +++ b/multi/multi__global_filters.html @@ -57,7 +57,7 @@ uri: ws://localhost:3001 predicates: - Path=/websocket/**

-

6.8 Making An Exchange As Routed

After the Gateway has routed a ServerWebExchange it will mark that exchange as "routed" by adding gatewayAlreadyRouted +

6.8 Gateway Metrics Filter

The Gateway Metrics Filter runs as long as the property spring.cloud.gateway.metrics.enabled is not set to false. This filter adds a timer metric named "gateway.requests" with the following tags:

These metrics are then available to be scraped from /actuator/metrics/gateway.requests and can be easily integated with Prometheus to create a Grafana dashboard.

6.9 Making An Exchange As Routed

After the Gateway has routed a ServerWebExchange it will mark that exchange as "routed" by adding gatewayAlreadyRouted to the exchange attributes. Once a request has been marked as routed, other routing filters will not route the request again, essentially skipping the filter. There are convenience methods that you can use to mark an exchange as routed or check if an exchange has already been routed.

\ No newline at end of file diff --git a/multi/multi_spring-cloud-gateway.html b/multi/multi_spring-cloud-gateway.html index de657973..eae56261 100644 --- a/multi/multi_spring-cloud-gateway.html +++ b/multi/multi_spring-cloud-gateway.html @@ -1,3 +1,3 @@ - Spring Cloud Gateway

Spring Cloud Gateway


Table of Contents

1. How to Include Spring Cloud Gateway
2. Glossary
3. How It Works
4. Route Predicate Factories
4.1. After Route Predicate Factory
4.2. Before Route Predicate Factory
4.3. Between Route Predicate Factory
4.4. Cookie Route Predicate Factory
4.5. Header Route Predicate Factory
4.6. Host Route Predicate Factory
4.7. Method Route Predicate Factory
4.8. Path Route Predicate Factory
4.9. Query Route Predicate Factory
4.10. RemoteAddr Route Predicate Factory
4.10.1. Modifying the way remote addresses are resolved
5. GatewayFilter Factories
5.1. AddRequestHeader GatewayFilter Factory
5.2. AddRequestParameter GatewayFilter Factory
5.3. AddResponseHeader GatewayFilter Factory
5.4. Hystrix GatewayFilter Factory
5.5. PrefixPath GatewayFilter Factory
5.6. PreserveHostHeader GatewayFilter Factory
5.7. RequestRateLimiter GatewayFilter Factory
5.7.1. Redis RateLimiter
5.8. RedirectTo GatewayFilter Factory
5.9. RemoveNonProxyHeaders GatewayFilter Factory
5.10. RemoveRequestHeader GatewayFilter Factory
5.11. RemoveResponseHeader GatewayFilter Factory
5.12. RewritePath GatewayFilter Factory
5.13. SaveSession GatewayFilter Factory
5.14. SecureHeaders GatewayFilter Factory
5.15. SetPath GatewayFilter Factory
5.16. SetResponseHeader GatewayFilter Factory
5.17. SetStatus GatewayFilter Factory
5.18. StripPrefix GatewayFilter Factory
5.19. Retry GatewayFilter Factory
6. Global Filters
6.1. Combined Global Filter and GatewayFilter Ordering
6.2. Forward Routing Filter
6.3. LoadBalancerClient Filter
6.4. Netty Routing Filter
6.5. Netty Write Response Filter
6.6. RouteToRequestUrl Filter
6.7. Websocket Routing Filter
6.8. Making An Exchange As Routed
7. Configuration
7.1. Fluent Java Routes API
7.2. DiscoveryClient Route Definition Locator
8. CORS Configuration
9. Actuator API
10. Developer Guide
10.1. Writing Custom Route Predicate Factories
10.2. Writing Custom GatewayFilter Factories
10.3. Writing Custom Global Filters
10.4. Writing Custom Route Locators and Writers
11. Building a Simple Gateway Using Spring MVC or Webflux
\ No newline at end of file + Spring Cloud Gateway

Spring Cloud Gateway


Table of Contents

1. How to Include Spring Cloud Gateway
2. Glossary
3. How It Works
4. Route Predicate Factories
4.1. After Route Predicate Factory
4.2. Before Route Predicate Factory
4.3. Between Route Predicate Factory
4.4. Cookie Route Predicate Factory
4.5. Header Route Predicate Factory
4.6. Host Route Predicate Factory
4.7. Method Route Predicate Factory
4.8. Path Route Predicate Factory
4.9. Query Route Predicate Factory
4.10. RemoteAddr Route Predicate Factory
4.10.1. Modifying the way remote addresses are resolved
5. GatewayFilter Factories
5.1. AddRequestHeader GatewayFilter Factory
5.2. AddRequestParameter GatewayFilter Factory
5.3. AddResponseHeader GatewayFilter Factory
5.4. Hystrix GatewayFilter Factory
5.5. PrefixPath GatewayFilter Factory
5.6. PreserveHostHeader GatewayFilter Factory
5.7. RequestRateLimiter GatewayFilter Factory
5.7.1. Redis RateLimiter
5.8. RedirectTo GatewayFilter Factory
5.9. RemoveNonProxyHeaders GatewayFilter Factory
5.10. RemoveRequestHeader GatewayFilter Factory
5.11. RemoveResponseHeader GatewayFilter Factory
5.12. RewritePath GatewayFilter Factory
5.13. SaveSession GatewayFilter Factory
5.14. SecureHeaders GatewayFilter Factory
5.15. SetPath GatewayFilter Factory
5.16. SetResponseHeader GatewayFilter Factory
5.17. SetStatus GatewayFilter Factory
5.18. StripPrefix GatewayFilter Factory
5.19. Retry GatewayFilter Factory
6. Global Filters
6.1. Combined Global Filter and GatewayFilter Ordering
6.2. Forward Routing Filter
6.3. LoadBalancerClient Filter
6.4. Netty Routing Filter
6.5. Netty Write Response Filter
6.6. RouteToRequestUrl Filter
6.7. Websocket Routing Filter
6.8. Gateway Metrics Filter
6.9. Making An Exchange As Routed
7. Configuration
7.1. Fluent Java Routes API
7.2. DiscoveryClient Route Definition Locator
8. CORS Configuration
9. Actuator API
10. Developer Guide
10.1. Writing Custom Route Predicate Factories
10.2. Writing Custom GatewayFilter Factories
10.3. Writing Custom Global Filters
10.4. Writing Custom Route Locators and Writers
11. Building a Simple Gateway Using Spring MVC or Webflux
\ No newline at end of file diff --git a/single/spring-cloud-gateway.html b/single/spring-cloud-gateway.html index 6eb2bb39..13925ebe 100644 --- a/single/spring-cloud-gateway.html +++ b/single/spring-cloud-gateway.html @@ -1,6 +1,6 @@ - Spring Cloud Gateway

Spring Cloud Gateway


Table of Contents

1. How to Include Spring Cloud Gateway
2. Glossary
3. How It Works
4. Route Predicate Factories
4.1. After Route Predicate Factory
4.2. Before Route Predicate Factory
4.3. Between Route Predicate Factory
4.4. Cookie Route Predicate Factory
4.5. Header Route Predicate Factory
4.6. Host Route Predicate Factory
4.7. Method Route Predicate Factory
4.8. Path Route Predicate Factory
4.9. Query Route Predicate Factory
4.10. RemoteAddr Route Predicate Factory
4.10.1. Modifying the way remote addresses are resolved
5. GatewayFilter Factories
5.1. AddRequestHeader GatewayFilter Factory
5.2. AddRequestParameter GatewayFilter Factory
5.3. AddResponseHeader GatewayFilter Factory
5.4. Hystrix GatewayFilter Factory
5.5. PrefixPath GatewayFilter Factory
5.6. PreserveHostHeader GatewayFilter Factory
5.7. RequestRateLimiter GatewayFilter Factory
5.7.1. Redis RateLimiter
5.8. RedirectTo GatewayFilter Factory
5.9. RemoveNonProxyHeaders GatewayFilter Factory
5.10. RemoveRequestHeader GatewayFilter Factory
5.11. RemoveResponseHeader GatewayFilter Factory
5.12. RewritePath GatewayFilter Factory
5.13. SaveSession GatewayFilter Factory
5.14. SecureHeaders GatewayFilter Factory
5.15. SetPath GatewayFilter Factory
5.16. SetResponseHeader GatewayFilter Factory
5.17. SetStatus GatewayFilter Factory
5.18. StripPrefix GatewayFilter Factory
5.19. Retry GatewayFilter Factory
6. Global Filters
6.1. Combined Global Filter and GatewayFilter Ordering
6.2. Forward Routing Filter
6.3. LoadBalancerClient Filter
6.4. Netty Routing Filter
6.5. Netty Write Response Filter
6.6. RouteToRequestUrl Filter
6.7. Websocket Routing Filter
6.8. Making An Exchange As Routed
7. Configuration
7.1. Fluent Java Routes API
7.2. DiscoveryClient Route Definition Locator
8. CORS Configuration
9. Actuator API
10. Developer Guide
10.1. Writing Custom Route Predicate Factories
10.2. Writing Custom GatewayFilter Factories
10.3. Writing Custom Global Filters
10.4. Writing Custom Route Locators and Writers
11. Building a Simple Gateway Using Spring MVC or Webflux

2.0.1.BUILD-SNAPSHOT

This project provides an API Gateway built on top of the Spring Ecosystem, including: Spring 5, Spring Boot 2 and Project Reactor. Spring Cloud Gateway aims to provide a simple, yet effective way to route to APIs and provide cross cutting concerns to them such as: security, monitoring/metrics, and resiliency.

1. How to Include Spring Cloud Gateway

To include Spring Cloud Gateway in your project use the starter with group org.springframework.cloud + Spring Cloud Gateway

Spring Cloud Gateway


Table of Contents

1. How to Include Spring Cloud Gateway
2. Glossary
3. How It Works
4. Route Predicate Factories
4.1. After Route Predicate Factory
4.2. Before Route Predicate Factory
4.3. Between Route Predicate Factory
4.4. Cookie Route Predicate Factory
4.5. Header Route Predicate Factory
4.6. Host Route Predicate Factory
4.7. Method Route Predicate Factory
4.8. Path Route Predicate Factory
4.9. Query Route Predicate Factory
4.10. RemoteAddr Route Predicate Factory
4.10.1. Modifying the way remote addresses are resolved
5. GatewayFilter Factories
5.1. AddRequestHeader GatewayFilter Factory
5.2. AddRequestParameter GatewayFilter Factory
5.3. AddResponseHeader GatewayFilter Factory
5.4. Hystrix GatewayFilter Factory
5.5. PrefixPath GatewayFilter Factory
5.6. PreserveHostHeader GatewayFilter Factory
5.7. RequestRateLimiter GatewayFilter Factory
5.7.1. Redis RateLimiter
5.8. RedirectTo GatewayFilter Factory
5.9. RemoveNonProxyHeaders GatewayFilter Factory
5.10. RemoveRequestHeader GatewayFilter Factory
5.11. RemoveResponseHeader GatewayFilter Factory
5.12. RewritePath GatewayFilter Factory
5.13. SaveSession GatewayFilter Factory
5.14. SecureHeaders GatewayFilter Factory
5.15. SetPath GatewayFilter Factory
5.16. SetResponseHeader GatewayFilter Factory
5.17. SetStatus GatewayFilter Factory
5.18. StripPrefix GatewayFilter Factory
5.19. Retry GatewayFilter Factory
6. Global Filters
6.1. Combined Global Filter and GatewayFilter Ordering
6.2. Forward Routing Filter
6.3. LoadBalancerClient Filter
6.4. Netty Routing Filter
6.5. Netty Write Response Filter
6.6. RouteToRequestUrl Filter
6.7. Websocket Routing Filter
6.8. Gateway Metrics Filter
6.9. Making An Exchange As Routed
7. Configuration
7.1. Fluent Java Routes API
7.2. DiscoveryClient Route Definition Locator
8. CORS Configuration
9. Actuator API
10. Developer Guide
10.1. Writing Custom Route Predicate Factories
10.2. Writing Custom GatewayFilter Factories
10.3. Writing Custom Global Filters
10.4. Writing Custom Route Locators and Writers
11. Building a Simple Gateway Using Spring MVC or Webflux

2.0.1.BUILD-SNAPSHOT

This project provides an API Gateway built on top of the Spring Ecosystem, including: Spring 5, Spring Boot 2 and Project Reactor. Spring Cloud Gateway aims to provide a simple, yet effective way to route to APIs and provide cross cutting concerns to them such as: security, monitoring/metrics, and resiliency.

1. How to Include Spring Cloud Gateway

To include Spring Cloud Gateway in your project use the starter with group org.springframework.cloud and artifact id spring-cloud-starter-gateway. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train.

If you include the starter, but, for some reason, you do not want the gateway to be enabled, set spring.cloud.gateway.enabled=false.

[Important]Important

Spring Cloud Gateway requires the Netty runtime provided by Spring Boot and Spring Webflux. It does not work in a traditional Servlet Container or built as a WAR.

2. Glossary

  • Route: Route the basic building block of the gateway. It is defined by an ID, a destination URI, a collection of predicates and a collection of filters. A route is matched if aggregate predicate is true.
  • Predicate: This is a Java 8 Function Predicate. The input type is a Spring Framework ServerWebExchange. This allows developers to match on anything from the HTTP request, such as headers or parameters.
  • Filter: These are instances Spring Framework GatewayFilter constructed in with a specific factory. Here, requests and responses can be modified before or after sending the downstream request.

3. How It Works

Spring Cloud Gateway Diagram

Clients make requests to Spring Cloud Gateway. If the Gateway Handler Mapping determines that a request matches a Route, it is sent to the Gateway Web Handler. This handler runs sends the request through a filter chain that is specific to the request. The reason the filters are divided by the dotted line, is that filters may execute logic before the proxy request is sent or after. All "pre" filter logic is executed, then the proxy request is made. After the proxy request is made, the "post" filter logic is executed.

[Note]Note

URIs defined in routes without a port will get a default port set to 80 and 443 for HTTP and HTTPS URIs respectively.

4. Route Predicate Factories

Spring Cloud Gateway matches routes as part of the Spring WebFlux HandlerMapping infrastructure. Spring Cloud Gateway includes many built-in Route Predicate Factories. All of these predicates match on different attributes of the HTTP request. Multiple Route Predicate Factories can be combined and are combined via logical and.

4.1 After Route Predicate Factory

The After Route Predicate Factory takes one parameter, a datetime. This predicate matches requests that happen after the current datetime.

application.yml. 

spring:
@@ -390,7 +390,7 @@ using something like         uri: ws://localhost:3001
         predicates:
         - Path=/websocket/**

-

6.8 Making An Exchange As Routed

After the Gateway has routed a ServerWebExchange it will mark that exchange as "routed" by adding gatewayAlreadyRouted +

6.8 Gateway Metrics Filter

The Gateway Metrics Filter runs as long as the property spring.cloud.gateway.metrics.enabled is not set to false. This filter adds a timer metric named "gateway.requests" with the following tags:

  • routeId: The route id
  • routeUri: The URI that the API will be routed to
  • outcome |Outcome as classified by HttpStatus.Series
  • status: Http Status of the request returned to the client

These metrics are then available to be scraped from /actuator/metrics/gateway.requests and can be easily integated with Prometheus to create a Grafana dashboard.

6.9 Making An Exchange As Routed

After the Gateway has routed a ServerWebExchange it will mark that exchange as "routed" by adding gatewayAlreadyRouted to the exchange attributes. Once a request has been marked as routed, other routing filters will not route the request again, essentially skipping the filter. There are convenience methods that you can use to mark an exchange as routed or check if an exchange has already been routed.

  • ServerWebExchangeUtils.isAlreadyRouted takes a ServerWebExchange object and checks if it has been "routed"
  • ServerWebExchangeUtils.setAlreadyRouted takes a ServerWebExchange object and marks it as "routed"

7. Configuration

Configuration for Spring Cloud Gateway is driven by a collection of `RouteDefinitionLocator`s.

RouteDefinitionLocator.java.  diff --git a/spring-cloud-gateway.xml b/spring-cloud-gateway.xml index 6aeb35e9..af8e6b2c 100644 --- a/spring-cloud-gateway.xml +++ b/spring-cloud-gateway.xml @@ -945,6 +945,25 @@ public GlobalFilter c() { +

+Gateway Metrics Filter +The Gateway Metrics Filter runs as long as the property spring.cloud.gateway.metrics.enabled is not set to false. This filter adds a timer metric named "gateway.requests" with the following tags: + + +routeId: The route id + + +routeUri: The URI that the API will be routed to + + +outcome |Outcome as classified by HttpStatus.Series + + +status: Http Status of the request returned to the client + + +These metrics are then available to be scraped from /actuator/metrics/gateway.requests and can be easily integated with Prometheus to create a Grafana dashboard. +
Making An Exchange As Routed After the Gateway has routed a ServerWebExchange it will mark that exchange as "routed" by adding gatewayAlreadyRouted