# Loki + Promtail + Grafana 監控測試

目前測試使用二進制 (Binary) Loki 及 Promtail + Granfana 套件做測試, 以下有使用到的port若在有防火牆的系統下練習請開通通防火牆port

## 1. 下載二進制 (Binary) Loki 及 Promtail
下載以下
loki-linux-amd64.zip
promtail-linux-amd64.zip

## 2. 解壓後放置 /usr/local/bin 底下

## 3. 建立設定檔
### 3.1 編輯 promtail-config.yaml

server:
  http_listen_port: 9080
  grpc_listen_port: 0

positions:
  filename: /tmp/positions.yaml

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

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

## 3.2 編輯 loki-config.yaml

auth_enabled: false

server:
  http_listen_port: 3100
  grpc_listen_port: 9096

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

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

ruler:
  alertmanager_url: http://localhost:9093

## 4. 執行
### 4.1 執行 pormtail

promtail -config.file=promtail-config.yaml

### 4.2 執行 Loki

loki -config.file=loki-config.yaml

## 5. Grafana 設定
### 5.1 在安裝好 Grafana 的環境開啟 Grafana Web 控制介面
這部份請參閱我的Grafana install文件

### 5.2 新增 Datasource => Loki
確認TEST成功

### 5.3 新增 Dashboards => Loki
### 5.4 設定 Loki Dashboards 頁面

https://www.cnblogs.com/n00dle/p/16916044.html

dock run loki
https://medium.com/@NeroHin/devops-grafana-loki-promtail-logging-system-%E5%B0%8F%E8%A9%A6%E7%89%9B%E5%88%80-b922ba8ed0d8

sudo yum install -y https://github.com/grafana/loki/releases/download/v2.3.1/loki-linux-amd64.rpm

# run loki
podman run --name loki -d -v $(pwd):/mnt/config -p 3100:3100 grafana/loki:latest -config.file=/mnt/config/loki-config.yaml

# run promtail
podman run --name promtail -d -v $(pwd):/mnt/config -v /var/log:/var/log --link loki grafana/promtail:latest -config.file=/mnt/config/promtail-config.yaml

useing helm
https://grafana.com/docs/loki/latest/setup/install/helm/