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docs Operator (HTTP) docs-agent-http-operator The operator endpoint provides cluster-level tools for Consul operators.

Operator HTTP Endpoint

The Operator endpoint provides cluster-level tools for Consul operators, such as interacting with the Raft subsystem. This was added in Consul 0.7.

~> Use this interface with extreme caution, as improper use could lead to a Consul outage and even loss of data.

If ACLs are enabled then a token with operator privileges may be required in order to use this interface. See the ACL internals guide for more information.

See the Outage Recovery guide for some examples of how these capabilities are used. For a CLI to perform these operations manually, please see the documentation for the consul operator command.

The following endpoints are supported:

Not all endpoints support blocking queries and all consistency modes, see details in the sections below.

The operator endpoints support the use of ACL Tokens. See the ACL internals guide for more information.

/v1/operator/raft/configuration

The Raft configuration endpoint supports the GET method.

GET Method

When using the GET method, the request will be forwarded to the cluster leader to retrieve its latest Raft peer configuration.

If the cluster doesn't 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.

By default, the datacenter of the agent is queried; however, the dc can be provided using the ?dc= query parameter.

If ACLs are enabled, the client will need to supply an ACL Token with operator read privileges.

A JSON body is returned that looks like this:

{
  "Servers": [
    {
      "ID": "127.0.0.1:8300",
      "Node": "alice",
      "Address": "127.0.0.1:8300",
      "Leader": true,
      "Voter": true
    },
    {
      "ID": "127.0.0.2:8300",
      "Node": "bob",
      "Address": "127.0.0.2:8300",
      "Leader": false,
      "Voter": true
    },
    {
      "ID": "127.0.0.3:8300",
      "Node": "carol",
      "Address": "127.0.0.3:8300",
      "Leader": false,
      "Voter": true
    }
  ],
  "Index": 22
}

The Servers array has information about the servers in the Raft peer configuration:

ID is the ID of the server. This is the same as the Address in Consul 0.7 but may be upgraded to a GUID in a future version of Consul.

Node is the node name of the server, as known to Consul, or "(unknown)" if the node is stale and not known.

Address is the IP:port for the server.

Leader is either "true" or "false" depending on the server's role in the Raft configuration.

Voter is "true" or "false", indicating if the server has a vote in the Raft configuration. Future versions of Consul may add support for non-voting servers.

The Index value is the Raft corresponding to this configuration. The latest configuration may not yet be committed if changes are in flight.

/v1/operator/raft/peer

The Raft peer endpoint supports the DELETE method.

DELETE Method

Using the DELETE method, this endpoint will remove the Consul server with given address from the Raft configuration.

There are rare cases where a peer may be left behind in the Raft configuration even though the server is no longer present and known to the cluster. This endpoint can be used to remove the failed server so that it is no longer affects the Raft quorum.

An ?address= query parameter is required and should be set to the IP:port for the server to remove. The port number is usually 8300, unless configured otherwise. Nothing is required in the body of the request.

By default, the datacenter of the agent is targeted; however, the dc can be provided using the ?dc= query parameter.

If ACLs are enabled, the client will need to supply an ACL Token with operator write privileges.

The return code will indicate success or failure.

/v1/operator/keyring

Available in Consul 0.7.2 and later, the keyring endpoint supports the GET, POST, PUT and DELETE methods.

This endpoint supports the use of ACL tokens using either the X-CONSUL-TOKEN header or the ?token= query parameter.

Added in Consul 0.7.4, this endpoint supports the ?relay-factor= query parameter. See the Keyring Command for more details.

GET Method

Using the GET method, this endpoint will list the gossip encryption keys installed on both the WAN and LAN rings of every known datacenter. There is more information on gossip encryption available here.

If ACLs are enabled, the client will need to supply an ACL Token with keyring read privileges.

A JSON body is returned that looks like this:

[
    {
        "WAN": true,
        "Datacenter": "dc1",
        "Keys": {
            "0eK8RjnsGC/+I1fJErQsBA==": 1,
            "G/3/L4yOw3e5T7NTvuRi9g==": 1,
            "z90lFx3sZZLtTOkutXcwYg==": 1
        },
        "NumNodes": 1
    },
    {
        "WAN": false,
        "Datacenter": "dc1",
        "Keys": {
            "0eK8RjnsGC/+I1fJErQsBA==": 1,
            "G/3/L4yOw3e5T7NTvuRi9g==": 1,
            "z90lFx3sZZLtTOkutXcwYg==": 1
        },
        "NumNodes": 1
    }
]

WAN is true if the block refers to the WAN ring of that datacenter (rather than LAN).

Datacenter is the datacenter the block refers to.

Keys is a map of each gossip key to the number of nodes it's currently installed on.

NumNodes is the total number of nodes in the datacenter.

POST Method

Using the POST method, this endpoint will install a new gossip encryption key into the cluster. There is more information on gossip encryption available here.

The POST method expects a JSON request body to be submitted. The request body must look like:

{
  "Key": "3lg9DxVfKNzI8O+IQ5Ek+Q=="
}

The Key field is mandatory and provides the encryption key to install into the cluster.

If ACLs are enabled, the client will need to supply an ACL Token with keyring write privileges.

The return code will indicate success or failure.

PUT Method

Using the PUT method, this endpoint will change the primary gossip encryption key. The key must already be installed before this operation can succeed. There is more information on gossip encryption available here.

The PUT method expects a JSON request body to be submitted. The request body must look like:

{
 "Key": "3lg9DxVfKNzI8O+IQ5Ek+Q=="
}

The Key field is mandatory and provides the primary encryption key to begin using.

If ACLs are enabled, the client will need to supply an ACL Token with keyring write privileges.

The return code will indicate success or failure.

DELETE Method

Using the DELETE method, this endpoint will remove a gossip encryption key from the cluster. This operation may only be performed on keys which are not currently the primary key. There is more information on gossip encryption available here.

The DELETE method expects a JSON request body to be submitted. The request body must look like:

{
 "Key": "3lg9DxVfKNzI8O+IQ5Ek+Q=="
}

The Key field is mandatory and provides the encryption key to remove from the cluster.

If ACLs are enabled, the client will need to supply an ACL Token with keyring write privileges.

The return code will indicate success or failure.

/v1/operator/autopilot/configuration

Available in Consul 0.8.0 and later, the autopilot configuration endpoint supports the GET and PUT methods.

This endpoint supports the use of ACL tokens using either the X-CONSUL-TOKEN header or the ?token= query parameter.

By default, the datacenter of the agent is queried; however, the dc can be provided using the ?dc= query parameter.

GET Method

When using the GET method, the request will be forwarded to the cluster leader to retrieve its latest Autopilot configuration.

If the cluster doesn't 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.

If ACLs are enabled, the client will need to supply an ACL Token with operator read privileges.

A JSON body is returned that looks like this:

{
    "CleanupDeadServers": true,
    "LastContactThreshold": "200ms",
    "MaxTrailingLogs": 250,
    "ServerStabilizationTime": "10s",
    "CreateIndex": 4,
    "ModifyIndex": 4
}

For more information about the Autopilot configuration options, see the agent configuration section here.

PUT Method

Using the PUT method, this endpoint will update the Autopilot configuration of the cluster.

The ?cas=<index> can optionally be specified to update the configuration as 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.

If ACLs are enabled, the client will need to supply an ACL Token with operator write privileges.

The PUT method expects a JSON request body to be submitted. The request body must look like:

{
    "CleanupDeadServers": true,
    "LastContactThreshold": "200ms",
    "MaxTrailingLogs": 250,
    "ServerStabilizationTime": "10s",
    "CreateIndex": 4,
    "ModifyIndex": 4
}

For more information about the Autopilot configuration options, see the agent configuration section here.

The return code will indicate success or failure.

/v1/operator/autopilot/health

Available in Consul 0.8.0 and later, the autopilot health endpoint supports the GET method.

This endpoint supports the use of ACL tokens using either the X-CONSUL-TOKEN header or the ?token= query parameter.

By default, the datacenter of the agent is queried; however, the dc can be provided using the ?dc= query parameter.

GET Method

When using the GET method, the request will be forwarded to the cluster leader to retrieve its latest Autopilot configuration.

If ACLs are enabled, the client will need to supply an ACL Token with operator read privileges.

A JSON body is returned that looks like this:

{
    "Healthy": true,
    "FailureTolerance": 0,
    "Servers": [
        {
            "ID": "e349749b-3303-3ddf-959c-b5885a0e1f6e",
            "Name": "node1",
            "SerfStatus": "alive",
            "LastContact": "0s",
            "LastTerm": 2,
            "LastIndex": 46,
            "Healthy": true,
            "Voter": true,
            "StableSince": "2017-03-06T22:07:51Z"
        },
        {
            "ID": "e36ee410-cc3c-0a0c-c724-63817ab30303",
            "Name": "node2",
            "SerfStatus": "alive",
            "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 heathly.

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).

The Servers list holds detailed health information on each server:

  • ID is the Raft ID of the server.

  • Name is the node name of the server.

  • SerfStatus is the SerfHealth check status for the server.

  • 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.

  • StableSince is the time this server has been in its current Healthy state.