在使用 promtail、loki 和 grafana 的设置中，grafana explore 中没有显示任何数据。所有三个部分都在同一台机器上运行。

问题是：在哪里查找设置中的错误？

普罗姆泰尔

promtail.yaml：

server:
  http_listen_port: 9080
  grpc_listen_port: 0

positions:
  filename: /var/db/promtail/positions.yaml

clients:
  - url: http://127.0.0.1:3100/loki/api/v1/push

scrape_configs:
- job_name: system
  static_configs:
  - targets:
      - localhost
    labels:
      job: varlogs
      __path__: /var/log/**/*log

这似乎没问题。测试：

promtail --config.file=promtail.yaml --log.level=info -print-config-stderr

---
# Loki Config
# (version=, branch=, revision=unknown)
global:
  file_watch_config:
    min_poll_frequency: 250ms
    max_poll_frequency: 250ms
server:
  http_listen_network: tcp
  http_listen_address: ""
  http_listen_port: 9080
[...]
level=info ts=2023-12-13T16:00:24.711575585Z caller=promtail.go:133 msg="Reloading configuration file" md5sum=169d8cc02367d196d7ba24694ea90c5d
level=info ts=2023-12-13T16:00:24.712927375Z caller=server.go:322 http=[::]:9080 grpc=[::]:32729 msg="server listening on addresses"
level=info ts=2023-12-13T16:00:24.713264874Z caller=main.go:174 msg="Starting Promtail" version="(version=, branch=, revision=unknown)"
level=warn ts=2023-12-13T16:00:24.713474024Z caller=promtail.go:263 msg="enable watchConfig"
level=info ts=2023-12-13T16:00:29.714075081Z caller=filetargetmanager.go:361 msg="Adding target" key="/var/log/**/*log:{job=\"varlogs\"}"
level=info ts=2023-12-13T16:00:29.716662721Z caller=filetarget.go:313 msg="watching new directory" directory=/var/log/loki
level=info ts=2023-12-13T16:00:29.716703277Z caller=filetarget.go:313 msg="watching new directory" directory=/var/log/promtail
level=info ts=2023-12-13T16:00:29.716812088Z caller=filetarget.go:313 msg="watching new directory" directory=/var/log/gitea
level=info ts=2023-12-13T16:00:29.716857702Z caller=filetarget.go:313 msg="watching new directory" directory=/var/log/grafana
level=info ts=2023-12-13T16:00:29.717132151Z caller=filetarget.go:313 msg="watching new directory" directory=/var/log/redis
level=info ts=2023-12-13T16:00:29.717201082Z caller=filetarget.go:313 msg="watching new directory" directory=/var/log/caddy
level=info ts=2023-12-13T16:00:29.717280021Z caller=filetarget.go:313 msg="watching new directory" directory=/var/log
ts=2023-12-13T16:00:29.720424446Z caller=log.go:168 level=info msg="Seeked /var/log/caddy/caddy.log - &{Offset:606936482 Whence:0}"
level=info ts=2023-12-13T16:00:29.720534804Z caller=tailer.go:145 component=tailer msg="tail routine: started" path=/var/log/caddy/caddy.log
ts=2023-12-13T16:00:29.720631282Z caller=log.go:168 level=info msg="Seeked /var/log/gitea/gitea.log - &{Offset:8194 Whence:0}"
level=info ts=2023-12-13T16:00:29.72066379Z caller=tailer.go:145 component=tailer msg="tail routine: started" path=/var/log/gitea/gitea.log
ts=2023-12-13T16:00:29.720728343Z caller=log.go:168 level=info msg="Seeked /var/log/grafana/grafana.log - &{Offset:38901 Whence:0}"
level=info ts=2023-12-13T16:00:29.720756759Z caller=tailer.go:145 component=tailer msg="tail routine: started" path=/var/log/grafana/grafana.log
[...]

洛基

洛基.yaml

auth_enabled: false

server:
  http_listen_port: 3100
  grpc_listen_port: 9096

common:
  instance_addr: 127.0.0.1
  path_prefix: /var/db/loki
  storage:
    filesystem:
      chunks_directory: /var/db/loki/chunks
      rules_directory: /var/db/loki/rules
  replication_factor: 1
  ring:
    kvstore:
      store: inmemory

query_range:
  results_cache:
    cache:
      embedded_cache:
        enabled: true
        max_size_mb: 100

schema_config:
  configs:
    - from: 2020-10-24
      store: boltdb-shipper
      object_store: filesystem
      schema: v11
      index:
        prefix: index_
        period: 24h

loki 应用程序/服务已启动并正在运行。我还可以在这里测试什么吗？

格拉法纳

创建的 loki 数据源：

• 类型：洛基
• URL：（http://127.0.0.1:3100 其他所有内容：保留默认设置）

即使没有任何过滤条件，仅查看 grafana/explore也不会显示任何数据。光是按Run query好像没有什么效果。

grafana 日志对我来说看起来不错：

尾部 /var/log/grafana/grafana.log

logger=grafana.update.checker t=2023-12-13T16:31:16.759743533+01:00 level=info msg="Update check succeeded" duration=486.885735ms
logger=cleanup t=2023-12-13T16:41:16.24610575+01:00 level=info msg="Completed cleanup jobs" duration=13.483743ms
logger=plugins.update.checker t=2023-12-13T16:41:16.617294501+01:00 level=info msg="Update check succeeded" duration=334.848905ms
logger=grafana.update.checker t=2023-12-13T16:41:16.657803737+01:00 level=info msg="Update check succeeded" duration=387.307337ms
logger=cleanup t=2023-12-13T16:51:16.240282272+01:00 level=info msg="Completed cleanup jobs" duration=7.750284ms
logger=grafana.update.checker t=2023-12-13T16:51:16.292110778+01:00 level=info msg="Update check succeeded" duration=21.261137ms
logger=plugins.update.checker t=2023-12-13T16:51:16.313163122+01:00 level=info msg="Update check succeeded" duration=31.295959ms
logger=cleanup t=2023-12-13T17:01:16.220217724+01:00 level=info msg="Completed cleanup jobs" duration=4.195714ms
logger=plugins.update.checker t=2023-12-13T17:01:16.312587838+01:00 level=info msg="Update check succeeded" duration=30.754461ms
logger=grafana.update.checker t=2023-12-13T17:01:16.333881656+01:00 level=info msg="Update check succeeded" duration=63.366615ms

感谢您指出这里可能缺少的内容。