confdroid_alloy/templates/config.alloy.erb

<% if @ay_manage_loki == true -%>

// Define file discovery for your logs
local.file_match "system_logs" {
  path_targets = [
<% @log_targets_array.each do |target| -%>
    {__path__ = "<%= target %>"},
<% end -%>
  ]
  sync_period = "5s"
}

loki.process "syslog" {
  stage.regex {
    expression = `(?P<ts>[A-Z][a-z]{2}\s{1,2}\d{1,2}\s\d{2}:\d{2}:\d{2})\s(?P<host>[\w\.\@-]+)\s(?P<log>.*)$`
  }
  stage.labels {
    values = {
      hostname = "${host}"
    }
  }
  stage.timestamp {
    source = "ts"
    format = "Jan _2 15:04:05"
  }
  stage.output {
    source = "log"
  }
  forward_to = [loki.write.loki.receiver]
}


loki.write "loki" {
  endpoint {
    url = "<%= @ay_loki_url %>"
    basic_auth {
      username = "<%= @ay_loki_username %>"
      password = "<%= @ay_loki_userpass %>"
    }
  }
}
<% end -%>
<% if @ay_manage_prom == true -%>
// Metrics collection
prometheus.exporter.unix "system_metrics" {
  include_exporter_metrics = true
  disable_collectors       = ["mdadm"]
}

prometheus.scrape "scrape_system" {
  targets    = prometheus.exporter.unix.system_metrics.targets
  forward_to = [prometheus.remote_write.prometheus.receiver]
  scrape_interval = "15s"
}

prometheus.remote_write "prometheus" {
  endpoint {
    url = "<%= @ay_prom_url %>"
    basic_auth {
      username = "<%= @ay_loki_username %>"
      password = "<%= @ay_loki_userpass %>"
    }
  }
}
<% end %>