spring-cloud-alibaba-demo ​

<!--链路追踪-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-sleuth</artifactId>
        </dependency>

第一个值，spring.application.name的值
    
    第二个值，0faa27ad8177e6be，sleuth生成的一个ID，叫【Trace ID】，用来标识一条请求链路，一条请求链路中包含一个Trace ID，多个Span ID
    
    第三个值，852ef4cfcdecabf3、【spanid】基本的工作单元，获取元数据，如发送一个http
    
    第四个值：false，是否要将该信息输出到【zipkin 可视化 服务中来收集和展示】。

docker run -d -p 9411:9411 openzipkin/zipkin:2.23.0

<!--收集链路信息-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>

spring:
  zipkin:
    base-url: http://127.0.0.1:9411/ #zipkin地址
    discovery-client-enabled: false  #不用开启服务发现
​
  sleuth:
    sampler:
      probability: 1.0 #采样百分比

java -jar zipkin-server-2.12.9-exec.jar \
--STORAGE_TYPE=mysql \
--MYSQL_HOST=127.0.0.1 \
--MYSQL_TCP_PORT=3306 \
--MYSQL_DB=zipkin_log \
--MYSQL_USER=root \
--MYSQL_PASS=root

CREATE TABLE IF NOT EXISTS zipkin_spans (
  `trace_id_high` BIGINT NOT NULL DEFAULT 0 COMMENT 'If non zero, this means the trace uses 128 bit traceIds instead of 64 bit',
  `trace_id` BIGINT NOT NULL,
  `id` BIGINT NOT NULL,
  `name` VARCHAR(255) NOT NULL,
  `parent_id` BIGINT,
  `debug` BIT(1),
  `start_ts` BIGINT COMMENT 'Span.timestamp(): epoch micros used for endTs query and to implement TTL',
  `duration` BIGINT COMMENT 'Span.duration(): micros used for minDuration and maxDuration query'
) ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;

ALTER TABLE zipkin_spans ADD UNIQUE KEY(`trace_id_high`, `trace_id`, `id`) COMMENT 'ignore insert on duplicate';
ALTER TABLE zipkin_spans ADD INDEX(`trace_id_high`, `trace_id`, `id`) COMMENT 'for joining with zipkin_annotations';
ALTER TABLE zipkin_spans ADD INDEX(`trace_id_high`, `trace_id`) COMMENT 'for getTracesByIds';
ALTER TABLE zipkin_spans ADD INDEX(`name`) COMMENT 'for getTraces and getSpanNames';
ALTER TABLE zipkin_spans ADD INDEX(`start_ts`) COMMENT 'for getTraces ordering and range';

CREATE TABLE IF NOT EXISTS zipkin_annotations (
  `trace_id_high` BIGINT NOT NULL DEFAULT 0 COMMENT 'If non zero, this means the trace uses 128 bit traceIds instead of 64 bit',
  `trace_id` BIGINT NOT NULL COMMENT 'coincides with zipkin_spans.trace_id',
  `span_id` BIGINT NOT NULL COMMENT 'coincides with zipkin_spans.id',
  `a_key` VARCHAR(255) NOT NULL COMMENT 'BinaryAnnotation.key or Annotation.value if type == -1',
  `a_value` BLOB COMMENT 'BinaryAnnotation.value(), which must be smaller than 64KB',
  `a_type` INT NOT NULL COMMENT 'BinaryAnnotation.type() or -1 if Annotation',
  `a_timestamp` BIGINT COMMENT 'Used to implement TTL; Annotation.timestamp or zipkin_spans.timestamp',
  `endpoint_ipv4` INT COMMENT 'Null when Binary/Annotation.endpoint is null',
  `endpoint_ipv6` BINARY(16) COMMENT 'Null when Binary/Annotation.endpoint is null, or no IPv6 address',
  `endpoint_port` SMALLINT COMMENT 'Null when Binary/Annotation.endpoint is null',
  `endpoint_service_name` VARCHAR(255) COMMENT 'Null when Binary/Annotation.endpoint is null'
) ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;

ALTER TABLE zipkin_annotations ADD UNIQUE KEY(`trace_id_high`, `trace_id`, `span_id`, `a_key`, `a_timestamp`) COMMENT 'Ignore insert on duplicate';
ALTER TABLE zipkin_annotations ADD INDEX(`trace_id_high`, `trace_id`, `span_id`) COMMENT 'for joining with zipkin_spans';
ALTER TABLE zipkin_annotations ADD INDEX(`trace_id_high`, `trace_id`) COMMENT 'for getTraces/ByIds';
ALTER TABLE zipkin_annotations ADD INDEX(`endpoint_service_name`) COMMENT 'for getTraces and getServiceNames';
ALTER TABLE zipkin_annotations ADD INDEX(`a_type`) COMMENT 'for getTraces';
ALTER TABLE zipkin_annotations ADD INDEX(`a_key`) COMMENT 'for getTraces';

CREATE TABLE IF NOT EXISTS zipkin_dependencies (
  `day` DATE NOT NULL,
  `parent` VARCHAR(255) NOT NULL,
  `child` VARCHAR(255) NOT NULL,
  `call_count` BIGINT
) ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;

ALTER TABLE zipkin_dependencies ADD UNIQUE KEY(`day`, `parent`, `child`);

java -jar zipkin-server-2.12.9-exec.jar \
--STORAGE_TYPE=elasticsearch \
--ES-HOST=localhost:9200

java.lang.IllegalStateException: response for update-template failed: {"error":{"root_cause":[{"type":"invalid_index_template_exception","reason":"index_template [zipkin:span_template]invalid, cause [Validation Failed: 1: index_pattern [zipkin:span-*] must not contain a ':';]"}],"type":"invalid_index_template_exception","reason":"index_template [zipkin:span_template] invalid, cause [Validation Failed: 1: index_pattern [zipkin:span-*] must not contain a ':';]"},"status":400}

<!--配置中心-->
<dependency>
       <groupId>com.alibaba.cloud</groupId>
       <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>

@RestController
@RequestMapping("/config")
@RefreshScope
public class ConfigController {

    @Value("${useLocalCache:false}")
    private boolean useLocalCache;

    @RequestMapping("/get")
    public boolean get() {
        return useLocalCache;
    }
}

/**
 * @author zb
 * @Description
 *
 *  服务降级-》进而熔断-》恢复调用链路
 *  服务降级 fallback
 */
@FeignClient(value = "cloud-order-service",fallback = OrderFeignClientFallback.class)
public interface OrderFeignClient {

    /**
     *  获取订单列表
     * @return
     */
    @GetMapping("/v1/order/list")
    R listOrder();

}

/**
 * @author zb
 * @Description
 */
@Component
public class OrderFeignClientFallback implements OrderFeignClient {

    @Override
    public R listOrder() {
        // 请求另外服务出错就会进入到这里的兜底方法
        return R.fail("获取数据失败了，这是兜底数据哦。。。");
    }

}

# 本地磁盘skywalking-agent.jar的本地磁盘路径
-javaagent:C:\Users\SuperZheng\Desktop\apache-skywalking-apm-bin-es7\agent\skywalking-agent.jar
# 在skywalking上显示的服务名
-DSW_AGENT_NAME=GatewayApplication
# skywalking的collector服务的IP以及端口
-DSW_AGENT_COLLECTOR_BACKEND_SERVICES=127.0.0.1:11800

<!--Skywalking工具类, 版本号与服务端一致-->
        <dependency>
            <groupId>org.apache.skywalking</groupId>
            <artifactId>apm-toolkit-trace</artifactId>
            <version>8.5.0</version>
        </dependency>

2019-01-25 15:23:46.264 INFO 1452 --- [nio-8080-exec-1] Initializing Spring FrameworkServlet 'dispatcherServlet'

2019-01-25 15:23:46.265 INFO 1452 --- [nio-8080-exec-1] FrameworkServlet 'dispatcherServlet': initialization started  
2019-01-25 15:23:46.395 INFO 1452 --- [nio-8080-exec-1] FrameworkServlet 'dispatcherServlet': initialization completed in 130 ms

spring:
  mvc:
    servlet:
      # 当值为0或者大于0时，表示容器在应用启动时就加载并初始化这个servlet
      load-on-startup: 1

<!-- 引入skywalking 日志依赖 -->
        <dependency>
            <groupId>org.apache.skywalking</groupId>
            <artifactId>apm-toolkit-logback-1.x</artifactId>
            <version>8.5.0</version>
        </dependency>

# 假如skywalking没有部署在本地，就需要配置以下内容到 agent/config/agent.config
plugin.toolkit.log.grpc.reporter.server_host=${SW_GRPC_LOG_SERVER_HOST:127.0.0.1}
plugin.toolkit.log.grpc.reporter.server_port=${SW_GRPC_LOG_SERVER_PORT:11800}
plugin.toolkit.log.grpc.reporter.max_message_size=${SW_GRPC_LOG_MAX_MESSAGE_SIZE:10485760}
plugin.toolkit.log.grpc.reporter.upstream_timeout=${SW_GRPC_LOG_GRPC_UPSTREAM_TIMEOUT:30}