main.tf

variable "honeycomb_dataset" {}
variable "honeycomb_api_key" { default = "1ae3cea44e0026bf01627c6bab6f5227" }
variable "region" {}

resource "helm_release" "opentelemetry_collector" {
  atomic     = true
  chart      = "opentelemetry-collector"
  name       = "opentelemetry-collector"
  repository = "https://open-telemetry.github.io/opentelemetry-helm-charts"
  verify     = false
  version    = "0.8.1"
  wait       = true

  values = [<<-EOT
    agentCollector:
      enabled: true
      configOverride:
        processors:
          attributes:
            actions:
              - key: region
                value: "${var.region}"
                action: insert
        exporters:
          otlp:
            endpoint: "api.honeycomb.io:443"
            headers:
              "x-honeycomb-team": "${var.honeycomb_api_key}"
              "x-honeycomb-dataset": "${var.honeycomb_dataset}"
        service:
          extensions:
            health_check: {}
          pipelines:
            traces:
              receivers: [zipkin, jaeger]
              processors: [attributes, batch]
              exporters: [otlp]
    containerLogs:
      enabled: false
    EOT
  ]

}

// We disguise the the OTEL collector as grafana_agent_traces so that
// we don't have to change any endpoints in our configurations.
resource "kubernetes_service" "grafana_agent_traces" {
  metadata {
    name      = "grafana-agent-traces"
    namespace = "default"

    labels = {
      name = "grafana-agent-traces"
    }
  }

  spec {
    port {
      name        = "agent-http-metrics"
      port        = 8080
      target_port = "8080"
    }

    port {
      name        = "agent-thrift-compact"
      protocol    = "UDP"
      port        = 6831
      target_port = "6831"
    }

    port {
      name        = "agent-thrift-binary"
      protocol    = "UDP"
      port        = 6832
      target_port = "6832"
    }

    port {
      name        = "agent-thrift-http"
      protocol    = "TCP"
      port        = 14268
      target_port = "14268"
    }

    port {
      name        = "agent-thrift-grpc"
      protocol    = "TCP"
      port        = 14250
      target_port = "14250"
    }

    port {
      name        = "agent-zipkin"
      protocol    = "TCP"
      port        = 9411
      target_port = "9411"
    }

    port {
      name        = "agent-otlp"
      protocol    = "TCP"
      port        = 55680
      target_port = "55680"
    }

    port {
      name        = "agent-opencensus"
      protocol    = "TCP"
      port        = 55678
      target_port = "55678"
    }

    selector = {
      "app.kubernetes.io/name" = "opentelemetry-collector"
    }
  }
}