mirror of https://github.com/hashicorp/consul
Separate Annotations/Labels and Add `service-ignore` to Docs (#12323)
* Separate Annotations and Labels and add service-ignore label * changes to structure and call out for pod * add description and TOC * Update annotations-and-labels.mdx Co-authored-by: David Yu <dyu@hashicorp.com>pull/12367/head
Thomas Eckert
3 years ago
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---
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layout: docs
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page_title: Annotations and Labels
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description: >-
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The list of available labels and annotations for running Consul on Kubernetes.
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---
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# Annotations and Labels
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## Overview
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Consul on Kubernetes provides a few options for customizing how connect-inject behavior should be configured.
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This allows the user to configure natively configure Consul on select Kubernetes resources (i.e. pods, services).
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- [Annotations](#annotations)
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- [Labels](#labels)
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## Annotations
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Resource annotations could be used on the Kubernetes pod to control connnect-inject behavior.
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- `consul.hashicorp.com/connect-inject` - If this is "true" then injection
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is enabled. If this is "false" then injection is explicitly disabled.
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The default injector behavior requires pods to opt-in to injection by
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specifying this value as "true". This default can be changed in the
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injector's configuration if desired.
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- `consul.hashicorp.com/transparent-proxy` - If this is "true", this Pod
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will run with transparent proxy enabled. This means you can use Kubernetes
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DNS to access upstream services and all inbound and outbound traffic within
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the pod is redirected to go through the proxy.
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- `consul.hashicorp.com/transparent-proxy-overwrite-probes` - If this is "true"
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and transparent proxy is enabled, the Connect injector will overwrite Kubernetes
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HTTP probes to point to the Envoy proxy.
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- `consul.hashicorp.com/transparent-proxy-exclude-inbound-ports` - A comma-separated
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list of inbound ports to exclude from traffic redirection when running in transparent proxy
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mode.
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- `consul.hashicorp.com/transparent-proxy-exclude-outbound-cidrs` - A comma-separated
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list of outbound CIDRs to exclude from traffic redirection when running in transparent proxy
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mode.
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- `consul.hashicorp.com/transparent-proxy-exclude-outbound-ports` - A comma-separated
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list of outbound ports to exclude from traffic redirection when running in transparent proxy
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mode.
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- `consul.hashicorp.com/transparent-proxy-exclude-uids` - A comma-separated
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list of additional user IDs to exclude from traffic redirection when running in transparent proxy
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mode.
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- `consul.hashicorp.com/connect-service` - For pods that accept inbound
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connections, this specifies the name of the service that is being
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served. This defaults to the name of the Kubernetes service associated with the pod.
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If using ACLs, this must be the same name as the Pod's `ServiceAccount`.
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- `consul.hashicorp.com/connect-service-port` - For pods that accept inbound
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connections, this specifies the port to route inbound connections to. This
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is the port that the service is listening on. The service port defaults to
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the first exposed port on any container in the pod. If specified, the value
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can be the _name_ of a configured port, such as "http" or it can be a direct
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port value such as "8080". This is the port of the _service_, the proxy
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public listener will listen on a dynamic port.
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- `consul.hashicorp.com/connect-service-upstreams` - The list of upstream
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services that this pod needs to connect to via Connect along with a static
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local port to listen for those connections. When transparent proxy is enabled,
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this annotation is optional.
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- Services
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The name of the service is the name of the service registered with Consul. You can optionally specify datacenters with this annotation.
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```yaml
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annotations:
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"consul.hashicorp.com/connect-service-upstreams":"[service-name]:[port]:[optional datacenter]"
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```
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- Consul Enterprise Namespaces
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If running Consul Enterprise 1.7+, your upstream services may be running in different
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namespaces. The upstream namespace can be specified after the service name
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as `[service-name].[namespace]`. See [Consul Enterprise Namespaces](#consul-enterprise-namespaces)
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below for more details on configuring the injector.
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```yaml
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annotations:
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"consul.hashicorp.com/connect-service-upstreams":"[service-name].[service-namespace]:[port]:[optional datacenter]"
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```
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-> **NOTE:** If the namespace is not specified it will default to the namespace
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of the source service.
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~> **WARNING:** Setting a namespace when not using Consul Enterprise or using a version < 1.7
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is not supported. It will be treated as part of the service name.
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- [Prepared Query](/docs/connect/proxies#dynamic-upstreams-require-native-integration)
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```yaml
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annotations:
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'consul.hashicorp.com/connect-service-upstreams': 'prepared_query:[query name]:[port]'
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```
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- Multiple Upstreams
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If you would like to specify multiple services or upstreams, delimit them with commas
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```yaml
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annotations:
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"consul.hashicorp.com/connect-service-upstreams":"[service-name]:[port]:[optional datacenter],[service-name]:[port]:[optional datacenter]"
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```
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```yaml
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annotations:
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"consul.hashicorp.com/connect-service-upstreams":"[service-name]:[port]:[optional datacenter],prepared_query:[query name]:[port]"
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```
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- `consul.hashicorp.com/envoy-extra-args` - A space-separated list of [arguments](https://www.envoyproxy.io/docs/envoy/latest/operations/cli)
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to be passed to the injected envoy binary.
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```yaml
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annotations:
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consul.hashicorp.com/envoy-extra-args: '--log-level debug --disable-hot-restart'
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```
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- `consul.hashicorp.com/service-tags` - A comma separated list of tags that will
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be applied to the Consul service and its sidecar.
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```yaml
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annotations:
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consul.hashicorp.com/service-tags: foo,bar,baz
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```
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If you need your tag to have a comma in it you can escape the comma with `\,`. For example,
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`consul.hashicorp.com/service-tags: foo\,bar\,baz` will become the single tag `foo,bar,baz`.
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- `consul.hashicorp.com/service-meta-<YOUR_KEY>` - Set Consul meta key/value
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pairs that will be applied to the Consul service and its sidecar.
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The key will be what comes after `consul.hashicorp.com/service-meta-`, e.g.
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`consul.hashicorp.com/service-meta-foo: bar` will result in `foo: bar`.
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```yaml
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annotations:
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consul.hashicorp.com/service-meta-foo: baz
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consul.hashicorp.com/service-meta-bar: baz
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```
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- `consul.hashicorp.com/sidecar-proxy-` - Override default resource settings for
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the sidecar proxy container.
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The defaults are set in Helm config via the [`connectInject.sidecarProxy.resources`](/docs/k8s/helm#v-connectinject-sidecarproxy-resources) key.
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- `consul.hashicorp.com/sidecar-proxy-cpu-limit` - Override the default CPU limit.
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- `consul.hashicorp.com/sidecar-proxy-cpu-request` - Override the default CPU request.
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- `consul.hashicorp.com/sidecar-proxy-memory-limit` - Override the default memory limit.
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- `consul.hashicorp.com/sidecar-proxy-memory-request` - Override the default memory request.
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- `consul.hashicorp.com/consul-sidecar-` - Override default resource settings for
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the `consul-sidecar` container.
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The defaults are set in Helm config via the [`global.consulSidecarContainer.resources`](/docs/k8s/helm#v-global-consulsidecarcontainer) key.
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- `consul.hashicorp.com/consul-sidecar-cpu-limit` - Override the default CPU limit.
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- `consul.hashicorp.com/consul-sidecar-cpu-request` - Override the default CPU request.
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- `consul.hashicorp.com/consul-sidecar-memory-limit` - Override the default memory limit.
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- `consul.hashicorp.com/consul-sidecar-memory-request` - Override the default memory request.
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- `consul.hashicorp.com/enable-metrics` - Override the default Helm value [`connectInject.metrics.defaultEnabled`](/docs/k8s/helm#v-connectinject-metrics-defaultenabled).
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- `consul.hashicorp.com/enable-metrics-merging` - Override the default Helm value [`connectInject.metrics.defaultEnableMerging`](/docs/k8s/helm#v-connectinject-metrics-defaultenablemerging).
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- `consul.hashicorp.com/merged-metrics-port` - Override the default Helm value [`connectInject.metrics.defaultMergedMetricsPort`](/docs/k8s/helm#v-connectinject-metrics-defaultmergedmetricsport).
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- `consul.hashicorp.com/prometheus-scrape-port` - Override the default Helm value [`connectInject.metrics.defaultPrometheusScrapePort`](/docs/k8s/helm#v-connectinject-metrics-defaultprometheusscrapeport).
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- `consul.hashicorp.com/prometheus-scrape-path` - Override the default Helm value [`connectInject.metrics.defaultPrometheusScrapePath`](/docs/k8s/helm#v-connectinject-metrics-defaultprometheusscrapepath).
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- `consul.hashicorp.com/service-metrics-port` - Set the port where the Connect service exposes metrics.
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- `consul.hashicorp.com/service-metrics-path` - Set the path where the Connect service exposes metrics.
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## Labels
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Resource labels could be used on a Kubernetes service to control connect-inject behavior.
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- `consul.hashicorp.com/service-ignore` - This label can be set on a Kubernetes Service.
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If set to "true", the service will not be used to register a Consul endpoint. This can be
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useful in cases where 2 or more services point to the same deployment. Consul cannot register
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multiple endpoints to the same deployment. This label can be used to tell the endpoint
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registration to ignore all services except for the one which should be used for routing requests
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using Consul.
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