Grafana仅显示单一日志级别logs问题排查（Grafana+Loki分布式Helm Chart）

我已部署VictoriaMetrics与Promtail，将日志转发至Loki，且已成功收集全部日志。但在Grafana Explore界面中，日志级别标签仅显示为logs，而非预期的Info/Error/Warning，不过查看日志内容时会自动进行颜色区分。

Grafana Explore界面情况 #

界面中的日志级别筛选标签统一显示为“logs”，无法按具体日志级别（Info/Error/Warning）进行筛选，但日志内容会根据级别自动着色。

Loki配置 #

gateway:
  ingress:
    enabled: true
    ingressClassName: internal-nginx
    annotations:
      external-dns.alpha.kubernetes.io/hostname: loki.myhostname.com
    hosts:
      - host: loki.myhostname.com
        paths:
          - path: /
            pathType: Prefix
    tls: []

read:
  autoscaling:
    enabled: true
    minReplicas: 3
    maxReplicas: 5

write:
  autoscaling:
    enabled: true
    minReplicas: 3
    maxReplicas: 5

loki:
  structuredConfig:
    ingester:
      max_transfer_retries: 0
      chunk_idle_period: 1h
      chunk_target_size: 1536000
      max_chunk_age: 1h
    storage_config:
      aws:
        s3: s3://eu-central-1
        bucketnames: loki-centralized
      boltdb_shipper:
        shared_store: s3
    schema_config:
      configs:
        - from: "2022-08-17"
          store: boltdb-shipper
          object_store: aws
          schema: v11
          index:
            prefix: loki_index_
            period: 24h

serviceAccount:
  create: true
  name: loki-sa
  annotations:
    eks.amazonaws.com/role-arn: "my-sa-role"

Promtail配置 #

extraArgs:
- -client.external-labels=cluster=dev-03

config:
  lokiAddress: http://my-loki-host.com/loki/api/v1/push

内容的提问来源于stack exchange，提问作者Amir Lev