loki+promtail入门级部署

环境：基于docker compose部署loki+promtail服务，用于采集日志信息。已有现成的grafana服务，故此处部署为囊括grafana

1.docker-compose.yml配置文件

version: '2'
services:
  loki:
    image: grafana/loki
    container_name: loki
    restart: always
    ports:
      - "3100:3100"
    volumes:
      - /home/dockerfile/loki/loki-local-config.yaml:/etc/loki/loki-local-config.yaml
    command: -config.file=/etc/loki/loki-local-config.yaml

  promtail:
    image: grafana/promtail
    container_name: promtail
    restart: always
    volumes:
      - /home/dockerfile/loki/promtail-docker-config.yaml:/etc/promtail/promtail-docker-config.yaml
    command:
      -config.file=/etc/promtail/promtail-docker-config.yaml

2.loki-local-config.yaml配置文件（路径：/home/dockerfile/loki。根据实际情况存放即可）

auth_enabled: false

server:
  http_listen_port: 3100

ingester:
  lifecycler:
    address: 127.0.0.1
    ring:
      kvstore:
        store: inmemory
      replication_factor: 1
    final_sleep: 0s
  chunk_idle_period: 5m
  chunk_retain_period: 30s

schema_config:
  configs:
  - from: 2018-04-15
    store: boltdb
    object_store: filesystem
    schema: v9
    index:
      prefix: index_
      period: 168h

storage_config:
  boltdb:
    directory: /tmp/loki/index

  filesystem:
    directory: /tmp/loki/chunks

limits_config:
  enforce_metric_name: false
  reject_old_samples: true
  reject_old_samples_max_age: 168h

chunk_store_config:
  max_look_back_period: 0

table_manager:
  chunk_tables_provisioning:
    inactive_read_throughput: 0
    inactive_write_throughput: 0
    provisioned_read_throughput: 0
    provisioned_write_throughput: 0
  index_tables_provisioning:
    inactive_read_throughput: 0
    inactive_write_throughput: 0
    provisioned_read_throughput: 0
    provisioned_write_throughput: 0
  retention_deletes_enabled: false
  retention_period: 0

3.promtail-docker-config.yaml配置文件（路径：/home/dockerfile/loki。根据自身实际情况存放）

官网地址：https://github.com/grafana/loki/blob/v1.5.0/docs/clients/promtail/configuration.md

server:
  http_listen_port: 0
  grpc_listen_port: 0

positions:
  filename: /etc/promtail/positions.yaml   # 游标记录上一次同步位置
  sync_period: 10s #10秒钟同步一次

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

scrape_configs:
- job_name: test-java-log
  static_configs:
  - targets:
      - localhost
    labels:
      job: content-cloud-test
      app: content-cloud-test
      __path__: /opt/content-cloud/webapi/logs/*log   # docker运行时已经把宿主机的目录 /opt/ 映射给了promtail 容器的 /opt/,所以这个地方可以直接访问log文件

4.在grafana中，添加datasource-->loki

5.通过grafana的explore即可查看loki日志。效果图