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docs: Update docs to reflect limitation in TProxy when using single Consul DC deployment with multiple k8s clusters (#10549) 

* docs: Update to reflect single Consul DC deployment with multiple k8s clusters
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David Yu 2021-07-08 10:44:29 -07:00 committed by GitHub
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website/content/docs/connect/transparent-proxy.mdx
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@ -138,6 +138,8 @@ Services can also dial explicit upstreams in other datacenters without transpare
[annotation](/docs/k8s/connect#consul-hashicorp-com-connect-service-upstreams) such as [annotation](/docs/k8s/connect#consul-hashicorp-com-connect-service-upstreams) such as
`"consul.hashicorp.com/connect-service-upstreams": "my-service:1234:dc2"` to reach an upstream service called `my-service` `"consul.hashicorp.com/connect-service-upstreams": "my-service:1234:dc2"` to reach an upstream service called `my-service`
in the datacenter `dc2`. in the datacenter `dc2`.
* In the deployment configuration where a [single Consul datacenter spans multiple Kubernetes clusters](https://www.consul.io/docs/k8s/installation/deployment-configurations/single-dc-multi-k8s), services in one Kubernetes cluster must explicitly dial a service in another Kubernetes cluster using the [consul.hashicorp.com/connect-service-upstreams](/docs/k8s/connect#consul-hashicorp-com-connect-service-upstreams) annotation. An example would be
`"consul.hashicorp.com/connect-service-upstreams": "my-service:1234"`, where `my-service` is the service that exists in another Kubernetes cluster and is exposed on port `1234`. Although Transparent Proxy is enabled, KubeDNS is not utilized when communicating between services existing on separate Kubernetes clusters.
* When dialing headless services the request will be proxied using a plain TCP proxy with a 5s connection timeout. * When dialing headless services the request will be proxied using a plain TCP proxy with a 5s connection timeout.
Currently the upstream's protocol and connection timeout are not considered. Currently the upstream's protocol and connection timeout are not considered.

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website/content/docs/k8s/installation/deployment-configurations/single-dc-multi-k8s.mdx
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@ -182,6 +182,8 @@ helm install cluster2 -f cluster2-config.yaml hashicorp/consul
## Verifying the Consul Service Mesh works ## Verifying the Consul Service Mesh works
~> When Transparent proxy is enabled, services in one Kubernetes cluster that need to communicate with a service in another Kubernetes cluster must have a explicit upstream configured through the ["consul.hashicorp.com/connect-service-upstreams"](https://www.consul.io/docs/k8s/connect#consul-hashicorp-com-connect-service-upstreams) annotation.
Now that we have our Consul cluster in multiple k8s clusters up and running, we will Now that we have our Consul cluster in multiple k8s clusters up and running, we will
deploy two services and verify that they can connect to each other. deploy two services and verify that they can connect to each other.