存储跟踪数据

Zipkin Server默认时间追踪数据信息保存到内存，这种方式不适合生产环境。因为一旦Service关闭重启或者服务崩溃，就会导致历史数据消失。Zipkin支持将追踪数据持久化到mysql数据库或者存储到elasticsearch中。这里已mysql为例。

准备数据库

可以从官网找到Zipkin Server持久mysql的数据库脚本。

  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';
  ALTER TABLE zipkin_annotations ADD INDEX(`trace_id`, `span_id`, `a_key`)
COMMENT 'for dependencies job';

   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`);

配置启动服务端参数：

 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 --MYSQL_USER=root --MYSQL_PASS=123

STORAGE_TYPE : 存储类型、MYSQL_HOST： mysql主机地址、MYSQL_TCP_PORT：mysql端口、MYSQL_DB： mysql数据库名称、MYSQL_USER：mysql用户名、MYSQL_PASS ：mysql密码

配置好服务端之后，可以在浏览器请求几次。回到数据库查看会发现数据已经持久化到zipkin中：