先起一个 Sidecar 服务，一个PHP服务一个应用，和PHP服务部署在同一台机子，通过 localhost 访问，这样就解决了网络开销，相当于本地进程间调用

Sidecar 服务比较简单，

1、这里记录下 maven 的配置

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>cn.taxiong</groupId>

    <artifactId>tx_php_server_side_car</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>jar</packaging>

    <name>tx_php_server_side_car</name>

    <description>Demo project for Spring Boot</description>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.0.4.RELEASE</version>

        <relativePath/> <!-- lookup parent from repository -->

    </parent>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <java.version>1.8</java.version>

    </properties>

    <!--配置仓库-->

    <repositories>

        <repository>

            <id>aliRepository</id>

            <name>aliRepository</name>

            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>

            <snapshots>

                <enabled>false</enabled>

            </snapshots>

        </repository>

    </repositories>

    <!-- cloud -->

    <dependencyManagement>

        <dependencies>

            <dependency>

                <groupId>org.springframework.cloud</groupId>

                <artifactId>spring-cloud-dependencies</artifactId>

                <version>Finchley.RELEASE</version>

                <type>pom</type>

                <scope>import</scope>

            </dependency>

        </dependencies>

    </dependencyManagement>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-netflix-sidecar</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>

        </dependency>

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>

2、sidecar 相关的配置，及注册中心的配置

spring:

  application:

    name: tx-php-server-sidecar

#服务注册中心端口号

server:

  port: 8203

#服务注册中心实例的主机名、端口

#是否向服务注册中心注册自己

#是否检索服务

#服务注册中心的配置内容，指定服务注册中心的位置

eureka:

  port: 8200

  instance:

    hostname: localhost

  client:

    register-with-eureka: true

    fetch-registry: true

    serviceUrl:

      defaultZone: http://${eureka.instance.hostname}:${eureka.port}/eureka/

sidecar:

  port: 1215

  instance:

    hostname: localhost

  health-uri: http://${sidecar.instance.hostname}:${sidecar.port}/health

3、服务启动类 @EnableSidecar

4、还需要在PHP服务一个检查服务的接口或文件，注意响应头类型 Content-Type

以 laravel 框架为例子，配置后的地址是 http://127.0.0.1:1215/health

Route::get('health', function () {

    $content = '{ "status" : "UP" }';

    $status = 200;

    $value = 'application/json; charset=utf-8';

    return response($content, $status)

        ->header('Content-Type', $value);

});