job "loki" {
  datacenters = ["dc1"]
  type        = "service"

  group "loki" {
    count = 1

    network {
      port "http" {
        static = 3100
      }
      port "grpc" {
        static = 9096
      }
    }

    task "loki" {
      driver = "docker"

      config {
        image = "grafana/loki:2.9.3"
        ports = ["http", "grpc"]
        
        args = [
          "-config.file=/local/loki-config.yml",
        ]
      }

      template {
        data = <<EOH
auth_enabled: false

server:
  http_listen_port: 3100
  grpc_listen_port: 9096

common:
  path_prefix: /alloc/data/loki
  storage:
    filesystem:
      chunks_directory: /alloc/data/loki/chunks
      rules_directory: /alloc/data/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

limits_config:
  retention_period: 168h  # 7 days retention
  ingestion_rate_mb: 10
  ingestion_burst_size_mb: 20

compactor:
  working_directory: /alloc/data/loki/compactor
  shared_store: filesystem

ruler:
  alertmanager_url: http://localhost:9093
EOH

        destination = "local/loki-config.yml"
      }

      resources {
        cpu    = 500
        memory = 512
      }

      service {
        name = "loki"
        port = "http"
        
        tags = [
          "logging",
        ]

        check {
          type     = "http"
          path     = "/ready"
          interval = "10s"
          timeout  = "2s"
        }
      }
    }
  }
}