Paul Banks 5b0d4db6bc Support Agent Caching for Service Discovery Results (#4541 )

* Add cache types for catalog/services and health/services and basic test that caching works

* Support non-blocking cache types with Cache-Control semantics.

* Update API docs to include caching info for every endpoint.

* Comment updates per PR feedback.

* Add note on caching to the 10,000 foot view on the architecture page to make the new data path more clear.

* Document prepared query staleness quirk and force all background requests to AllowStale so we can spread service discovery load across servers.

2018-10-10 16:55:34 +01:00

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layout	page_title	sidebar_current	description
api	Network Segments - Operator - HTTP API	api-operator-segment	The /operator/segment endpoint exposes the network segment information via Consul's HTTP API.

Network Areas - Operator HTTP API

The /operator/segment endpoint provides tools to manage network segments via Consul's HTTP API.

~> Enterprise-only! This API endpoint and functionality only exists in Consul Enterprise. This is not present in the open source version of Consul.

The network area functionality described here is available only in Consul Enterprise version 0.9.3 and later. Network segments are operator-defined sections of agents on the LAN, typically isolated from other segments by network configuration.

Please see the Network Segments Guide for more details.

List Network Segments

This endpoint lists all network areas.

Method	Path	Produces
`GET`	`/operator/segment`	`application/json`

The table below shows this endpoint's support for blocking queries, consistency modes, agent caching, and required ACLs.

Blocking Queries	Consistency Modes	Agent Caching	ACL Required
`NO`	`none`	`none`	`operator:read`

Parameters

dc (string: "") - Specifies the datacenter to query. This will default to the datacenter of the agent being queried. This is specified as a URL query parameter.

Sample Request

$ curl \
    http://127.0.0.1:8500/v1/operator/segment

Sample Response

["","alpha","beta"]

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