private-connectivity（私人连接）

Grafana Cloud Private Connectivity

Docs: https://grafana.com/docs/grafana-cloud/send-data/

Send metrics, logs, traces, and profiles to Grafana Cloud entirely over your cloud provider's private backbone — no public internet exposure, no egress fees.

Prerequisites

All providers:

• Grafana Cloud stack must be hosted on the same cloud provider (check: My Account → Stack → Details)
• Create separate private endpoints for each signal type (Metrics, Logs, Traces, Profiles)

AWS PrivateLink

Setup

1. Get Service Names from Grafana Cloud → Stack Details → "Send using AWS PrivateLink"
2. Create Interface VPC Endpoints in AWS Console for each service:

# Via AWS CLI
aws ec2 create-vpc-endpoint \
  --vpc-id vpc-12345 \
  --service-name com.amazonaws.vpce.us-east-1.vpce-svc-0abc123 \
  --vpc-endpoint-type Interface \
  --subnet-ids subnet-12345 \
  --security-group-ids sg-12345 \
  --private-dns-enabled

1. Update Alloy config to use private DNS names from Grafana Cloud console:

prometheus.remote_write "cloud_private" {
  endpoint {
    // Use private DNS name instead of public endpoint
    url = "https://prometheus-private.us-east-0.grafana.net/api/prom/push"
    basic_auth {
      username = sys.env("PROM_USER")
      password = sys.env("GRAFANA_CLOUD_API_KEY")
    }
  }
}

loki.write "cloud_private" {
  endpoint {
    url = "https://logs-private.us-east-0.grafana.net/loki/api/v1/push"
    basic_auth {
      username = sys.env("LOKI_USER")
      password = sys.env("GRAFANA_CLOUD_API_KEY")
    }
  }
}

Terraform

resource "aws_vpc_endpoint" "grafana_metrics" {
  vpc_id              = var.vpc_id
  service_name        = var.grafana_metrics_service_name  # from Grafana Cloud console
  vpc_endpoint_type   = "Interface"
  subnet_ids          = var.subnet_ids
  security_group_ids  = [aws_security_group.grafana_endpoint.id]
  private_dns_enabled = true

  tags = { Name = "grafana-metrics-privatelink" }
}

resource "aws_vpc_endpoint" "grafana_logs" {
  vpc_id              = var.vpc_id
  service_name        = var.grafana_logs_service_name
  vpc_endpoint_type   = "Interface"
  subnet_ids          = var.subnet_ids
  security_group_ids  = [aws_security_group.grafana_endpoint.id]
  private_dns_enabled = true

  tags = { Name = "grafana-logs-privatelink" }
}

Limitation: PrivateLink only works within the same AWS region. For cross-region, set up VPC peering first.

Azure Private Link

Setup

1. Get Service Alias from Grafana Cloud → Stack Details (one per signal type)
2. Create Private Endpoint in Azure Portal:

- Private Endpoints → Create - Resource tab → "Connect to Azure resource by resource ID or alias" - Paste Service Alias from Grafana Cloud - Select your VNet and subnet

1. Wait for automatic approval (~10 minutes)

# Via Azure CLI
az network private-endpoint create \
  --name grafana-metrics-endpoint \
  --resource-group myRG \
  --vnet-name myVNet \
  --subnet mySubnet \
  --connection-name grafana-metrics \
  --private-connection-resource-id "<service-alias-from-grafana-cloud>" \
  --group-ids grafana-metrics

Note: Azure Private Link requires pre-registering your Subscription IDs with Grafana Support before setup.

GCP Private Service Connect

1. Get service attachment URI from Grafana Cloud console
2. Create Private Service Connect endpoint in GCP:

gcloud compute forwarding-rules create grafana-metrics-psc \
  --region=us-east1 \
  --network=my-vpc \
  --subnet=my-subnet \
  --address=grafana-metrics-ip \
  --target-service-attachment=projects/grafana-cloud/regions/us-east1/serviceAttachments/metrics

Private Data Source Connect (PDC)

For connecting to data sources (databases, Prometheus, etc.) hosted in private networks, use PDC — a separate product from private telemetry ingestion:

# Install PDC agent
helm install pdc grafana/grafana-agent \
  --set pdcConfig.hostedGrafanaId=<your-stack-id> \
  --set pdcConfig.token=<pdc-token>

PDC creates an encrypted tunnel from Grafana Cloud back into your private network for data source queries. It's the reverse direction of PrivateLink (pull vs push).

Choosing the Right Option

Cost Savings

AWS PrivateLink eliminates:

• $0.09/GB cross-region data transfer (typical Grafana Cloud endpoint is in same region)
• $0.09/GB internet data transfer fees
• Potential NAT Gateway costs

At 100GB/month of telemetry: ~$9-18/month savings per endpoint type.