consul/website/source/api/config.html.md

layout	page_title	sidebar_current	description
api	Config - HTTP API	api-config	The /config endpoints are for managing centralized configuration in Consul.

Config HTTP Endpoint

The /config endpoints create, update, delete and query central configuration entries registered with Consul. See the agent configuration for more information on how to enable this functionality for centrally configuring services.

Apply Configuration

This endpoint creates or updates the given config entry.

Method	Path	Produces
PUT	/config	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	service:write operator:write1

¹ The ACL required depends on the config entry kind being updated:

Config Entry Kind	Required ACL
service-defaults	service:write
proxy-defaults	operator:write

Parameters

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

• cas (int: 0) - Specifies to use a Check-And-Set operation. If the index is 0, Consul will only store the entry if it does not already exist. If the index is non-zero, the entry is only set if the current index matches the ModifyIndex of that entry.

Sample Payload

{
    "Kind": "service-defaults",
    "Name": "web",
    "Protocol": "http",
    "Connect": {
        "SidecarProxy": false
    }
}

Sample Request

$ curl \
    --request PUT \
    --data @payload \
    http://127.0.0.1:8500/v1/config

Get Configuration

This endpoint returns a specific config entry.

Method	Path	Produces
GET	/config/:kind/:name	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
YES	all	none	service:read1

¹ The ACL required depends on the config entry kind being read:

Config Entry Kind	Required ACL
service-defaults	service:read
proxy-defaults	<none>

Parameters

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

• kind (string: <required>) - Specifies the kind of the entry to read. This is specified as part of the URL.

• name (string: <required>) - Specifies the name of the entry to read. This is specified as part of the URL.

Sample Request

$ curl \
    --request GET \
    http://127.0.0.1:8500/v1/config/service-defaults/web

Sample Response

{
    "Kind": "service-defaults",
    "Name": "web",
    "Protocol": "http",
    "Connect": {
        "SidecarProxy": true
    },
    "CreateIndex": 15,
    "ModifyIndex": 35
}

List Configurations

This endpoint returns all config entries of the given kind.

Method	Path	Produces
GET	/config/:kind	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
YES	all	none	service:read1

¹ The ACL required depends on the config entry kind being read:

Config Entry Kind	Required ACL
service-defaults	service:read
proxy-defaults	<none>

Parameters

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

• kind (string: <required>) - Specifies the kind of the entry to list. This is specified as part of the URL.

Sample Request

$ curl \
    --request GET \
    http://127.0.0.1:8500/v1/config/service-defaults

Sample Response

[
    {
        "Kind": "service-defaults",
        "Name": "db",
        "Protocol": "tcp",
        "Connect": {
            "SidecarProxy": false
        },
        "CreateIndex": 16,
        "ModifyIndex": 16
    },
    {
        "Kind": "service-defaults",
        "Name": "web",
        "Protocol": "http",
        "Connect": {
            "SidecarProxy": true
        },
        "CreateIndex": 13,
        "ModifyIndex": 13
    }
]

Delete Configuration

This endpoint creates or updates the given config entry.

Method	Path	Produces
DELETE	/config/:kind/:name	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	service:write operator:write1

¹ The ACL required depends on the config entry kind being deleted:

Config Entry Kind	Required ACL
service-defaults	service:write
proxy-defaults	operator:write

Parameters

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

• kind (string: <required>) - Specifies the kind of the entry to delete. This is specified as part of the URL.

• name (string: <required>) - Specifies the name of the entry to delete. This is specified as part of the URL.

Sample Request

$ curl \
    --request DELETE \
    http://127.0.0.1:8500/v1/config/service-defaults/web