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open-consul/website/source/api/operator/autopilot.html.md

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---
layout: api
page_title: Autopilot - Operator - HTTP API
sidebar_current: api-operator-autopilot
description: |-
The /operator/autopilot endpoints allow for automatic operator-friendly
management of Consul servers including cleanup of dead servers, monitoring
the state of the Raft cluster, and stable server introduction.
---
# Autopilot Operator HTTP API
The `/operator/autopilot` endpoints allow for automatic operator-friendly
management of Consul servers including cleanup of dead servers, monitoring
the state of the Raft cluster, and stable server introduction.
Please see the [Autopilot Guide](/docs/guides/autopilot.html) for more details.
## Read Configuration
This endpoint retrieves its latest Autopilot configuration.
| Method | Path | Produces |
| ------ | ---------------------------- | -------------------------- |
| `GET` | `/operator/autopilot/configuration` | `application/json` |
The table below shows this endpoint's support for
[blocking queries](/api/index.html#blocking-queries),
[consistency modes](/api/index.html#consistency-modes),
[agent caching](/api/index.html#agent-caching), and
[required ACLs](/api/index.html#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 part of the
URL as a query string.
- `stale` `(bool: false)` - If the cluster does not currently have a leader an
error will be returned. You can use the `?stale` query parameter to read the
Raft configuration from any of the Consul servers.
### Sample Request
```text
$ curl \
http://127.0.0.1:8500/operator/autopilot/configuration
```
### Sample Response
```json
{
"CleanupDeadServers": true,
"LastContactThreshold": "200ms",
"MaxTrailingLogs": 250,
"ServerStabilizationTime": "10s",
"RedundancyZoneTag": "",
"DisableUpgradeMigration": false,
"UpgradeVersionTag": "",
"CreateIndex": 4,
"ModifyIndex": 4
}
```
For more information about the Autopilot configuration options, see the
[agent configuration section](/docs/agent/options.html#autopilot).
## Update Configuration
This endpoint updates the Autopilot configuration of the cluster.
| Method | Path | Produces |
| ------ | ---------------------------- | -------------------------- |
| `PUT` | `/operator/autopilot/configuration` | `application/json` |
The table below shows this endpoint's support for
[blocking queries](/api/index.html#blocking-queries),
[consistency modes](/api/index.html#consistency-modes),
[agent caching](/api/index.html#agent-caching), and
[required ACLs](/api/index.html#acls).
| Blocking Queries | Consistency Modes | Agent Caching | ACL Required |
| ---------------- | ----------------- | ------------- | ---------------- |
| `NO` | `none` | `none` | `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 string.
- `cas` `(int: 0)` - Specifies to use a Check-And-Set operation. The update will
only happen if the given index matches the `ModifyIndex` of the configuration
at the time of writing.
- `CleanupDeadServers` `(bool: true)` - Specifies automatic removal of dead
server nodes periodically and whenever a new server is added to the cluster.
- `LastContactThreshold` `(string: "200ms")` - Specifies the maximum amount of
time a server can go without contact from the leader before being considered
unhealthy. Must be a duration value such as `10s`.
- `MaxTrailingLogs` `(int: 250)` specifies the maximum number of log entries
that a server can trail the leader by before being considered unhealthy.
- `ServerStabilizationTime` `(string: "10s")` - Specifies the minimum amount of
time a server must be stable in the 'healthy' state before being added to the
cluster. Only takes effect if all servers are running Raft protocol version 3
or higher. Must be a duration value such as `30s`.
- `RedundancyZoneTag` `(string: "")` - Controls the node-meta key to use when
Autopilot is separating servers into zones for redundancy. Only one server in
each zone can be a voting member at one time. If left blank, this feature will
be disabled.
- `DisableUpgradeMigration` `(bool: false)` - Disables Autopilot's upgrade
migration strategy in Consul Enterprise of waiting until enough
newer-versioned servers have been added to the cluster before promoting any of
them to voters.
- `UpgradeVersionTag` `(string: "")` - Controls the node-meta key to use for
version info when performing upgrade migrations. If left blank, the Consul
version will be used.
### Sample Payload
```json
{
"CleanupDeadServers": true,
"LastContactThreshold": "200ms",
"MaxTrailingLogs": 250,
"ServerStabilizationTime": "10s",
"RedundancyZoneTag": "",
"DisableUpgradeMigration": false,
"UpgradeVersionTag": "",
"CreateIndex": 4,
"ModifyIndex": 4
}
```
## Read Health
This endpoint queries the health of the autopilot status.
| Method | Path | Produces |
| ------ | ---------------------------- | -------------------------- |
| `GET` | `/operator/autopilot/health` | `application/json` |
The table below shows this endpoint's support for
[blocking queries](/api/index.html#blocking-queries),
[consistency modes](/api/index.html#consistency-modes),
[agent caching](/api/index.html#agent-caching), and
[required ACLs](/api/index.html#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 part of the
URL as a query string.
### Sample Request
```text
$ curl \
http://127.0.0.1:8500/v1/operator/autopilot/health
```
### Sample response
```json
{
"Healthy": true,
"FailureTolerance": 0,
"Servers": [
{
"ID": "e349749b-3303-3ddf-959c-b5885a0e1f6e",
"Name": "node1",
"Address": "127.0.0.1:8300",
"SerfStatus": "alive",
"Version": "0.7.4",
"Leader": true,
"LastContact": "0s",
"LastTerm": 2,
"LastIndex": 46,
"Healthy": true,
"Voter": true,
"StableSince": "2017-03-06T22:07:51Z"
},
{
"ID": "e36ee410-cc3c-0a0c-c724-63817ab30303",
"Name": "node2",
"Address": "127.0.0.1:8205",
"SerfStatus": "alive",
"Version": "0.7.4",
"Leader": false,
"LastContact": "27.291304ms",
"LastTerm": 2,
"LastIndex": 46,
"Healthy": true,
"Voter": false,
"StableSince": "2017-03-06T22:18:26Z"
}
]
}
```
- `Healthy` is whether all the servers are currently healthy.
- `FailureTolerance` is the number of redundant healthy servers that could be
fail without causing an outage (this would be 2 in a healthy cluster of 5
servers).
- `Servers` holds detailed health information on each server:
- `ID` is the Raft ID of the server.
- `Name` is the node name of the server.
- `Address` is the address of the server.
- `SerfStatus` is the SerfHealth check status for the server.
- `Version` is the Consul version of the server.
- `Leader` is whether this server is currently the leader.
- `LastContact` is the time elapsed since this server's last contact with the leader.
- `LastTerm` is the server's last known Raft leader term.
- `LastIndex` is the index of the server's last committed Raft log entry.
- `Healthy` is whether the server is healthy according to the current Autopilot configuration.
- `Voter` is whether the server is a voting member of the Raft cluster.
- `StableSince` is the time this server has been in its current `Healthy` state.
The HTTP status code will indicate the health of the cluster. If `Healthy` is true, then a
status of 200 will be returned. If `Healthy` is false, then a status of 429 will be returned.
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