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---
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layout: docs
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page_title: Connect - Observability
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sidebar_title: Observability
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description: |-
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This page documents the configurations necessary for L7 observability using
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Consul Connect.
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---
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2019-07-09 02:11:19 +00:00
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# Observability
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In order to take advantage of Connect's L7 observability features you will need
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to:
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- Deploy sidecar proxies that are capable of emitting metrics with each of your
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services. We have first class support for Envoy.
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- Define where your proxies should send metrics that they collect.
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- Define the protocols for each of your services.
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- Define the upstreams for each of your services.
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If you are using Envoy as your sidecar proxy, you will need to [enable
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gRPC](/docs/agent/options#grpc_port) on your client agents. To define the
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metrics destination and service protocol you may want to enable [configuration
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entries](/docs/agent/options#config_entries) and [centralized service
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configuration](/docs/agent/options#enable_central_service_config).
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If you
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are using Kubernetes, the Helm chart can simplify much of the necessary
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configuration, which you can learn about in the [observability
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tutorial](https://learn.hashicorp.com/tutorials/consul/kubernetes-layer7-observability).
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### Metrics Destination
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For Envoy the metrics destination can be configured in the proxy configuration
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entry's `config` section.
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```
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kind = "proxy-defaults"
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name = "global"
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config {
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"envoy_dogstatsd_url": "udp://127.0.0.1:9125"
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}
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```
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Find other possible metrics syncs in the [Connect Envoy documentation](/docs/connect/proxies/envoy#bootstrap-configuration).
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### Service Protocol
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You can specify the [service protocol](/docs/agent/config-entries/service-defaults#protocol)
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in the `service-defaults` configuration entry. You can override it in the
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[service registration](/docs/agent/services). By default, proxies only give
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you L4 metrics. This protocol allows proxies to handle requests at the right L7
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protocol and emit richer L7 metrics. It also allows proxies to make per-request
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load balancing and routing decisions.
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### Service Upstreams
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You can set the upstream for each service using the proxy's
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[`upstreams`](/docs/connect/registration/service-registration#upstreams)
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sidecar parameter, which can be defined in a service's [sidecar
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registration](/docs/connect/registration/sidecar-service).
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