terraform/website/source/docs/providers/consul/d/services.html.markdown

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---
layout: "consul"
page_title: "Consul: consul_catalog_services"
sidebar_current: "docs-consul-data-source-catalog-services"
description: |-
Provides a list of services in a given Consul datacenter.
---
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# consul_catalog_services
The `consul_catalog_services` data source returns a list of Consul services that
have been registered with the Consul cluster in a given datacenter. By
specifying a different datacenter in the `query_options` it is possible to
retrieve a list of services from a different WAN-attached Consul datacenter.
This data source is different from the `consul_catalog_service` (singular) data
source, which provides a detailed response about a specific Consul service.
## Example Usage
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```hcl
data "consul_catalog_services" "read-dc1" {
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query_options {
# Optional parameter: implicitly uses the current datacenter of the agent
datacenter = "dc1"
}
}
# Set the description to a whitespace delimited list of the services
resource "example_resource" "app" {
description = "${join(" ", data.consul_catalog_services.names)}"
# ...
}
```
## Argument Reference
The following arguments are supported:
* `datacenter` - (Optional) The Consul datacenter to query. Defaults to the
same value found in `query_options` parameter specified below, or if that is
empty, the `datacenter` value found in the Consul agent that this provider is
configured to talk to.
* `query_options` - (Optional) See below.
The `query_options` block supports the following:
* `allow_stale` - (Optional) When `true`, the default, allow responses from
Consul servers that are followers.
* `require_consistent` - (Optional) When `true` force the client to perform a
read on at least quorum servers and verify the result is the same. Defaults
to `false`.
* `token` - (Optional) Specify the Consul ACL token to use when performing the
request. This defaults to the same API token configured by the `consul`
provider but may be overriden if necessary.
* `wait_index` - (Optional) Index number used to enable blocking quereis.
* `wait_time` - (Optional) Max time the client should wait for a blocking query
to return.
## Attributes Reference
The following attributes are exported:
* `datacenter` - The datacenter the keys are being read from to.
* `names` - A list of the Consul services found. This will always contain the
list of services found.
* `services.<service>` - For each name given, the corresponding attribute is a
Terraform map of services and their tags. The value is an alphanumerically
sorted, whitespace delimited set of tags associated with the service.
* `tags` - A map of the tags found for each service. If more than one service
shares the same tag, unique service names will be joined by whitespace (this
is the inverse of `services` and can be used to lookup the services that match
a single tag).