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spring-cloud-tencent/spring-cloud-tencent-examples/polaris-router-grayrelease-.../README.md

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Spring Cloud Polaris Gray Release Example

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Project Explanation

This project shows how to use Spring Cloud Tencent route and transitive feature to do the full chain gray releasing.

Architecture

Incoming requests dispatched from Gateway service to 3 environments:

  • gray1(match uid=1), env=green(green environment)
  • gray2(match uid=2), env=purple(purple environment)
  • baseline(stable environment, match all other requests), env=blue(blue environment)

How to access

Start Gateway service

  1. add environment variables

    • polaris server address: polaris_address=grpc://127.0.0.1:8091
    • pushgateway address: prometheus_address=127.0.0.1:9091
  2. start router-grayrelease-gateway application

    • Launch by IDE: Start the main class GrayReleaseGatewayApplication.
    • Launch by Jar: Execute mvn clean package to compile with jar package, then use java -jar router-grayrelease-gateway-${verion}.jar to launch application.
  3. add the route rule

    Send http request to polaris server to add the route rule, make requests dispatched to 3 environments.

    POST /naming/v1/routings
    
    [{
    	"service": "gray-release-gateway",
    	"namespace": "default",
    	"outbounds": [
       {
    	    "sources": [
         {
    		   "service": "gray-release-gateway",
    		   "namespace": "default",
    		   "metadata": {
    			  "${http.header.uid}": {
    				 "type": "EXACT",
    			     "value": "2"
    			  }
    		   }
    	    }],
    	    "destinations": [
         {
    		   "service": "*",
    		   "namespace": "*",
    		   "metadata": {
    			  "env": {
    			    "type": "EXACT",
    			    "value": "purple"
    			  }
    		   },
    		   "priority": 0,
    		   "weight": 100,
    		   "isolate": false
    	    }]
    	  },
    	  {
    		"sources": [
         {
    		   "service": "gray-release-gateway",
    		   "namespace": "default",
    		   "metadata": {
    			 "${http.header.uid}": {
    				"type": "EXACT",
    				"value": "1"
    		     }
    		   }
    		}],
    		"destinations": [
         {
    			"service": "*",
    			"namespace": "*",
    			"metadata": {
    				"env": {
    					"type": "EXACT",
    					"value": "green"
    				}
    			},
    			"priority": 0,
    			"weight": 100,
    			"isolate": false
    		}]
    	  },
    	  {
    		"sources": [
         {
    			"service": "gray-release-gateway",
    			"namespace": "default",
    			"metadata": {
    				"*": {
    					"type": "EXACT",
    					"value": "*"
    				}
    			}
    		}],
    		"destinations": [
         {
    			"service": "*",
    			"namespace": "*",
    			"metadata": {
    				"env": {
    					"type": "EXACT",
    					"value": "blue"
    				}
    			},
    			"priority": 0,
    			"weight": 100,
    			"isolate": false
    		}]
    	  }
    	]
    }]
    

    The route rule can be added by polaris console:

Start Front service

Start baseline environment (blue)

  1. add environment variables

    • polaris server address: polaris_address=grpc://127.0.0.1:8091
    • pushgateway address: prometheus_address=127.0.0.1:9091
    • env tag: SCT_METADATA_CONTENT_env=blue
    • transitive tag: SCT_METADATA_CONTENT_TRANSITIVE=env
  2. start router-grayrelease-frontend application

    • Launch by IDE: Start the main class GrayReleaseFrontApplication.
    • Launch by Jar: Execute mvn clean package to compile with jar package, then use java -jar router-grayrelease-frontend-${verion}.jar to launch application.

Start gray1 environment (green)

  1. add environment variables

    • polaris server address: polaris_address=grpc://127.0.0.1:8091
    • pushgateway address: prometheus_address=127.0.0.1:9091
    • env tag: SCT_METADATA_CONTENT_env=green
    • transitive tag: SCT_METADATA_CONTENT_TRANSITIVE=env
  2. start router-grayrelease-frontend application (same as previous instruction)

    If port conflicted, you can specify another port by -Dserver.port

Start gray2 environment (purple)

  1. add environment variables

    • polaris server address: polaris_address=grpc://127.0.0.1:8091
    • pushgateway address: prometheus_address=127.0.0.1:9091
    • env tag: SCT_METADATA_CONTENT_env=purple
    • transitive tag: SCT_METADATA_CONTENT_TRANSITIVE=env
  2. start router-grayrelease-frontend application (same as previous instruction)

Start effective

You can find the instances with different tags in polaris console.

Start Middle service

Start baseline environment (blue)

  1. add environment variables

    • polaris server address: polaris_address=grpc://127.0.0.1:8091
    • pushgateway address: prometheus_address=127.0.0.1:9091
    • env tag: SCT_METADATA_CONTENT_env=blue
    • transitive tag: SCT_METADATA_CONTENT_TRANSITIVE=env
  2. start router-grayrelease-middle application

    • Launch by IDE: Start the main class GrayReleaseMiddleApplication.
    • Launch by Jar: Execute mvn clean package to compile with jar package, then use java -jar router-grayrelease-middle-${verion}.jar to launch application.

Start gray2 environment (purple)

  1. add environment variables

    • polaris server address: polaris_address=grpc://127.0.0.1:8091
    • pushgateway address: prometheus_address=127.0.0.1:9091
    • env tag: SCT_METADATA_CONTENT_env=purple
    • transitive tag: SCT_METADATA_CONTENT_TRANSITIVE=env
  2. start router-grayrelease-middle application (same as previous instruction)

Start Back service

Start baseline environment (blue)

  1. add environment variables

    • polaris server address: polaris_address=grpc://127.0.0.1:8091
    • pushgateway address: prometheus_address=127.0.0.1:9091
    • env tag: SCT_METADATA_CONTENT_env=blue
    • transitive tag: SCT_METADATA_CONTENT_TRANSITIVE=env
  2. start router-grayrelease-backend application

    • Launch by IDE: Start the main class GrayReleaseBackendApplication.
    • Launch by Jar: Execute mvn clean package to compile with jar package, then use java -jar router-grayrelease-backend-${verion}.jar to launch application.

Start gray1 environment (green)

  1. add environment variables

    • polaris server address: polaris_address=grpc://127.0.0.1:8091
    • pushgateway address: prometheus_address=127.0.0.1:9091
    • env tag: SCT_METADATA_CONTENT_env=green
    • transitive tag: SCT_METADATA_CONTENT_TRANSITIVE=env
  2. start router-grayrelease-backend application (same as previous instruction)

Test

Baseline routing

curl -H'uid:0' 127.0.0.1:59100/router/gray/route_rule

Got result

gray-release-gateway -> gray-release-front[blue] -> gray-release-middle[blue] -> gray-release-back[blue]

Green routing

curl -H'uid:1' 127.0.0.1:59100/router/gray/route_rule

Got result

gray-release-gateway -> gray-release-front[green] -> gray-release-middle[blue] -> gray-release-back[green]

Purple routing

curl -H'uid:2' 127.0.0.1:59100/router/gray/route_rule

Got result

gray-release-gateway -> gray-release-front[purple] -> gray-release-middle[purple] -> gray-release-back[blue]