Seata¶
部署实施¶
Seata 支持在 TC 开启 Metrics 数据采集并输出到 Prometheus 监控系统中。
开启 Seata Metrics¶
- 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"
}
}
- 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 metric 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））
开启 DataKit 采集器¶
-开启 DataKit Prometheus 插件，创建 seata-prom.conf
-修改 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"
-重启 DataKit
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 |