--- layout: api page_title: Operator - HTTP API sidebar_current: api-operator description: |- The /operator endpoints provides cluster-level tools for Nomad operators, such as interacting with the Raft subsystem. --- # /v1/operator The `/operator` endpoint provides cluster-level tools for Nomad operators, such as interacting with the Raft subsystem. ~> Use this interface with extreme caution, as improper use could lead to a Nomad outage and even loss of data. See the [Outage Recovery](/guides/outage.html) guide for some examples of how these capabilities are used. For a CLI to perform these operations manually, please see the documentation for the [`nomad operator`](/docs/commands/operator.html) command. ## Read Raft Configuration This endpoint queries the status of a client node registered with Nomad. | Method | Path | Produces | | ------ | --------------------------------- | -------------------------- | | `GET` | `/v1/operator/raft/configuration` | `application/json` | The table below shows this endpoint's support for [blocking queries](/api/index.html#blocking-queries) and [required ACLs](/api/index.html#acls). | Blocking Queries | ACL Required | | ---------------- | ------------ | | `NO` | `management` | ### Parameters - `stale` - Specifies if the cluster should respond without an active leader. This is specified as a querystring parameter. ### Sample Request ```text $ curl \ https://nomad.rocks/v1/operator/raft/configuration ``` ### Sample Response ```json { "Index": 1, "Servers": [ { "Address": "127.0.0.1:4647", "ID": "127.0.0.1:4647", "Leader": true, "Node": "bacon-mac.global", "RaftProtocol": 2, "Voter": true } ] } ``` #### Field Reference - `Index` `(int)` - The `Index` value is the Raft corresponding to this configuration. The latest configuration may not yet be committed if changes are in flight. - `Servers` `(array: Server)` - The returned `Servers` array has information about the servers in the Raft peer configuration. - `ID` `(string)` - The ID of the server. This is the same as the `Address` but may be upgraded to a GUID in a future version of Nomad. - `Node` `(string)` - The node name of the server, as known to Nomad, or `"(unknown)"` if the node is stale and not known. - `Address` `(string)` - The `ip:port` for the server. - `Leader` `(bool)` - is either "true" or "false" depending on the server's role in the Raft configuration. - `Voter` `(bool)` - is "true" or "false", indicating if the server has a vote in the Raft configuration. Future versions of Nomad may add support for non-voting servers. ## Remove Raft Peer This endpoint removes a Nomad server with given address from the Raft configuration. The return code signifies success or failure. | Method | Path | Produces | | -------- | ---------------------------| -------------------------- | | `DELETE` | `/v1/operator/raft/peer` | `application/json` | The table below shows this endpoint's support for [blocking queries](/api/index.html#blocking-queries) and [required ACLs](/api/index.html#acls). | Blocking Queries | ACL Required | | ---------------- | ------------ | | `NO` | `management` | ### Parameters - `address` `(string: )` - Specifies the server to remove as `ip:port`. This may be provided multiple times and is provided as a querystring parameter. - `stale` - Specifies if the cluster should respond without an active leader. This is specified as a querystring parameter. ### Sample Request ```text $ curl \ --request DELETE \ https://nomad.rocks/v1/operator/raft/peer?address=1.2.3.4 ``` ## Read Autopilot 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), and [required ACLs](/api/index.html#acls). | Blocking Queries | Consistency Modes | ACL Required | | ---------------- | ----------------- | --------------- | | `NO` | `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 Nomad servers. ### Sample Request ```text $ curl \ https://nomad.rocks/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 Autopilot 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), and [required ACLs](/api/index.html#acls). | Blocking Queries | Consistency Modes | ACL Required | | ---------------- | ----------------- | ---------------- | | `NO` | `none` | `opreator: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 Nomad 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 Nomad 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), and [required ACLs](/api/index.html#acls). | Blocking Queries | Consistency Modes | ACL Required | | ---------------- | ----------------- | --------------- | | `NO` | `none` | `opreator: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 \ https://nomad.rocks/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": "0.8.0", "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": "0.8.0", "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 Nomad 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.