Seata¶
视图预览¶
版本支持¶
操作系统：Linux / Windows
前置条件¶
部署实施¶
( Linux / Windows 环境相同)
1 原理¶
Seata 支持在 TC 开启 Metrics 数据采集并输出到 Prometheus 监控系统中。
2 指标采集¶
1、 配置在 TC 中配置开启 Metrics，打开 TC 中 Metrics 的配置项，Seata Server 已经包含了 metrics(seata-metrics-all)依赖, 但是默认是关闭状态，需要开启 metrics 的采集配置。（这一步非常重要）
Seata 1.5.0+中使用 application.yaml
seata:
metrics:
enabled: true
registry-type: compact
exporter-list: prometheus
exporter-prometheus-port: 9898
Seata <1.5.0开启 metrics github地址配置：https://github.com/seata/seata/blob/1.4.2/server/src/main/resources/file.conf.example
服务端配置metrics
【file.conf】
metrics {
enabled = true
registryType = "compact"
# multi exporters use comma divided
exporterList = "prometheus"
exporterPrometheusPort = 9898
}
【registry.conf 】
registry {
type = "nacos"
nacos {
application = "应用名"
serverAddr = "xxxx:端口"
group = "分组"
namespace = "命名空间"
cluster = "default"
username = "按照实际填写"
password = "按照实际填写"
}
}
config {
type = "file"
file {
name="file:/root/seata-config/file.conf"
}
}
2、 访问 http://tc-server-ip:9898/metrics，查看是否能访问到 metrics 数据
# HELP seata seata
# TYPE seata untyped
seata_transaction{meter="counter",role="tc",status="committed",} 1358.0 1551946035372
seata_transaction{meter="counter",role="tc",status="active",} 0.0 1551946035372
seata_transaction{meter="summary",role="tc",statistic="count",status="committed",} 6.0 1551946035372
seata_transaction{meter="summary",role="tc",statistic="total",status="committed",} 6.0 1551946035372
seata_transaction{meter="summary",role="tc",statistic="tps",status="committed",} 1.6163793103448276 1551946035372
seata_transaction{meter="timer",role="tc",statistic="count",status="committed",} 6.0 1551946035372
seata_transaction{meter="timer",role="tc",statistic="total",status="committed",} 910.0 1551946035372
seata_transaction{meter="timer",role="tc",statistic="max",status="committed",} 164.0 1551946035372
seata_transaction{meter="timer",role="tc",statistic="average",status="committed",} 151.66666666666666 1551946035372
得到以上类似数据证明 mertric 开启成功。（如果某些Transaction状态没有发生，例如rollback，那么对应的Metrics指标也不会存在（输出））
3、 开启 DataKit Promtheus 插件，创建 seata-prom.conf
4、 修改 /usr/local/datakit/conf.d/prom/seata-prom.conf 配置文件
[[inputs.prom]]
urls = ["http://ip:9898/metrics"]
## 忽略对 url 的请求错误
ignore_req_err = false
## 采集器别名
source = "资源名称"
metric_types = []
## 指标过滤，只收集 seata_相关指标
metric_name_filter = ["seata_*"]
measurement_prefix = "seata_"
## 采集间隔 "ns", "us" (or "µs"), "ms", "s", "m", "h"
interval = "10s"
## TLS 配置
tls_open = false
## 自定义Tags
[inputs.prom.tags]
app = "自定义app名字"
# more_tag = "some_other_value"
5、重启 DataKit
3 指标预览¶
场景视图¶
<场景 - 新建仪表板 - 模板库 - 系统视图 - Seata 监控视图>
指标详解¶
| Metrics | 描述 |
|---|---|
| seata.transaction(role=tc,meter=counter,status=active/committed/rollback) | 当前活动中/已提交/已回滚的事务总数 |
| seata.transaction(role=tc,meter=summary,statistic=count,status=committed/rollback) | 当前周期内提交/回滚的事务数 |
| seata.transaction(role=tc,meter=summary,statistic=tps,status=committed/rollback) | 当前周期内提交/回滚的事务TPS(transaction per second) |
| seata.transaction(role=tc,meter=timer,statistic=total,status=committed/rollback) | 当前周期内提交/回滚的事务耗时总和 |
| seata.transaction(role=tc,meter=timer,statistic=count,status=committed/rollback) | 当前周期内提交/回滚的事务数 |
| seata.transaction(role=tc,meter=timer,statistic=average,status=committed/rollback) | 当前周期内提交/回滚的事务平均耗时 |
| seata.transaction(role=tc,meter=timer,statistic=max,status=committed/rollback) | 当前周期内提交/回滚的事务最大耗时 |
常见问题排查¶
<无数据上报排查>