搭建grafana+loki+promtail日志收集系统

准备工作

下载地址

https://github.com/grafana/loki/releases

安装包放在服务器目录：/opt

wget https://github.com/grafana/loki/releases/download/v2.4.2/loki-linux-amd64.zip
wget https://github.com/grafana/loki/releases/download/v2.4.2/promtail-linux-amd64.zip

1、启动loki

1）解压loki-linux-amd64.zip

unzip loki-linux-amd64.zip 

2）授权

chmod a+x loki-linux-amd64

3）配置文件loki.yaml

vi loki.yaml

auth_enabled: false

server:
  http_listen_port: 3100
  grpc_listen_port: 3110
  grpc_server_max_recv_msg_size: 1073741824  #grpc最大接收消息值，默认4m
  grpc_server_max_send_msg_size: 1073741824  #grpc最大发送消息值，默认4m

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
  max_transfer_retries: 0
  max_chunk_age: 20m  #一个timeseries块在内存中的最大持续时间。如果timeseries运行的时间超过此时间，则当前块将刷新到存储并创建一个新块

schema_config:
  configs:
    - from: 2021-01-01
      store: boltdb
      object_store: filesystem
      schema: v11
      index:
        prefix: index_
        period: 168h

storage_config:
  boltdb:
    directory: /opt/loki/index #存储索引地址
  filesystem:
    directory: /opt/loki/chunks

limits_config:
  enforce_metric_name: false
  reject_old_samples: true
  reject_old_samples_max_age: 168h
  ingestion_rate_mb: 30  #修改每用户摄入速率限制，即每秒样本量，默认值为4M
  ingestion_burst_size_mb: 15  #修改每用户摄入速率限制，即每秒样本量，默认值为6M

chunk_store_config:
        #max_look_back_period: 168h   #回看日志行的最大时间，只适用于即时日志
  max_look_back_period: 0s

table_manager:
  retention_deletes_enabled: false #日志保留周期开关，默认为false
  retention_period: 0s  #日志保留周期

4）启动进程

nohup /opt/loki/loki-linux-amd64 -config.file=/opt/loki/loki.yaml >loki.out 2>&1 &

2、启动promtail

1）解压loki-linux-amd64.zip

unzip promtail-linux-amd64.zip

2）授权

chmod a+x promtail-linux-amd64

3）配置文件promtail.yaml

vi promtail.yaml

server:
  http_listen_port: 9080
  grpc_listen_port: 0
  grpc_server_max_recv_msg_size: 15728640
  grpc_server_max_send_msg_size: 15728640

positions:
  filename: /opt/loki/positions.yaml # This location needs to be writeable by promtail.

client:
  url: http://xx.xx.xx.xx:3100/loki/api/v1/push

#https://grafana.com/docs/loki/latest/clients/promtail/configuration/
scrape_configs:
- job_name: system
  static_configs:
  - targets:
      - localhost
    labels:
      job: messages
      __path__: /var/log/messages
- job_name: system
  static_configs:
  - targets:
      - localhost
    labels:
      job: varlogs
      __path__: /var/log/*log
- job_name: system
  static_configs:
  - targets:
      - localhost
    labels:
      job: secure
      __path__: /var/log/secure
#lastlog
- job_name: system
  static_configs:
  - targets:
      - localhost
    labels:
      job: lastlog
      __path__: /var/log/lastlog
#cron
- job_name: system
  static_configs:
  - targets:
      - localhost
    labels:
      job: cron
      __path__: /var/log/cron

4）启动进程

nohup /opt/loki/promtail-linux-amd64 -config.file=/opt/loki/promtail.yaml >promtail.out 2>&1 &

3、启动grafana

1）安装

官网安装教程地址：Download Grafana | Grafana Labs

wget https://dl.grafana.com/oss/release/grafana-7.4.3-1.x86_64.rpm 
sudo yum install grafana-7.4.3-1.x86_64.rpm 

2）启动

systemctl start grafana-server

3）查看状态

systemctl status grafana-server

4、logcli

1）下载

wget https://github.com/grafana/loki/releases/download/v2.4.2/logcli-linux-amd64.zip

2）解压logcli-linux-amd64.zip

unzip logcli-linux-amd64.zip

3）授权

chmod a+x logcli-linux-amd64.zip

4）查看

`{job="cron"} 
    |~ "ERROR"
    != "(python3)"`