To view details for each node in the cluster, use the cockroach node command with the appropriate subcommands and flags.

The cockroach node command is also used in the process of decommissioning nodes for removal from the cluster. See Decommission Nodes for more details.

Subcommands

Subcommand Usage
ls List the ID of each node in the cluster, excluding those that have been decommissioned and are offline.
status View the status of one or all nodes, excluding nodes that have been decommissioned and taken offline. Depending on flags used, this can include details about range/replicas, disk usage, and decommissioning progress.
decommission Decommission nodes for removal from the cluster. See Decommission Nodes for more details.
recommission Recommission nodes that have been decommissioned. See Recommission Nodes for more details.
drain Drain nodes of SQL clients, distributed SQL queries, and range leases, and prevent ranges from rebalancing onto the node. This is normally done by sending SIGTERM during node shutdown, but the drain subcommand provides operators an option to interactively monitor, and if necessary intervene in, the draining process.

Synopsis

List the IDs of active and inactive nodes:

$ cockroach node ls <flags>

Show status details for active and inactive nodes:

$ cockroach node status <flags>

Show status and range/replica details for active and inactive nodes:

$ cockroach node status --ranges <flags>

Show status and disk usage details for active and inactive nodes:

$ cockroach node status --stats <flags>

Show status and decommissioning details for active and inactive nodes:

$ cockroach node status --decommission <flags>

Show complete status details for active and inactive nodes:

$ cockroach node status --all <flags>

Show status details for a specific node:

$ cockroach node status <node ID> <flags>

Decommission nodes:

$ cockroach node decommission <node IDs> <flags>

Recommission nodes:

$ cockroach node recommission <node IDs> <flags>

Drain nodes:

$ cockroach node drain <flags>

View help:

$ cockroach node --help
$ cockroach node <subcommand> --help

Flags

All node subcommands support the following general-use and logging flags.

General

Flag Description
--format How to display table rows printed to the standard output. Possible values: tsv, csv, table, records, sql, html.

Default: tsv

The node ls subcommand also supports the following general flags:

Flag Description
--timeout Set the duration of time that the subcommand is allowed to run before it returns an error and prints partial information. The timeout is specified with a suffix of s for seconds, m for minutes, and h for hours. If this flag is not set, the subcommand may hang.

The node status subcommand also supports the following general flags:

Flag Description
--all Show all node details.
--decommission Show node decommissioning details.
--ranges Show node details for ranges and replicas.
--stats Show node disk usage details.
--timeout Set the duration of time that the subcommand is allowed to run before it returns an error and prints partial information. The timeout is specified with a suffix of s for seconds, m for minutes, and h for hours. If this flag is not set, the subcommand may hang.

The node decommission subcommand also supports the following general flags:

Flag Description
--wait When to return to the client. Possible values: all, none.

If all, the command returns to the client only after all replicas on all specified nodes have been transferred to other nodes. If any specified nodes are offline, the command will not return to the client until those nodes are back online.

If none, the command does not wait for the decommissioning process to complete; it returns to the client after starting the decommissioning process on all specified nodes that are online. Any specified nodes that are offline will automatically be marked as decommissioning; if they come back online, the cluster will recognize this status and will not rebalance data to the nodes.

Default: all
--self Applies the operation to the node against which the command was run (e.g., via --host).

The node drain subcommand also supports the following general flag:

Flag Description
--drain-wait Amount of time to wait for the node to drain before returning to the client.

Default: 10m

The node recommission subcommand also supports the following general flag:

Flag Description
--self Applies the operation to the node against which the command was run (e.g., via --host).

Client connection

Flag Description
--host The server host and port number to connect to. This can be the address of any node in the cluster.

Env Variable: COCKROACH_HOST
Default: localhost:26257
--port
-p
The server port to connect to. Note: The port number can also be specified via --host.

Env Variable: COCKROACH_PORT
Default: 26257
--user
-u
The SQL user that will own the client session.

Env Variable: COCKROACH_USER
Default: root
--insecure Use an insecure connection.

Env Variable: COCKROACH_INSECURE
Default: false
--certs-dir The path to the certificate directory containing the CA and client certificates and client key.

Env Variable: COCKROACH_CERTS_DIR
Default: ${HOME}/.cockroach-certs/
--url A connection URL to use instead of the other arguments.

Env Variable: COCKROACH_URL
Default: no URL

The node decommission, node recommission, and node drain subcommands also support the following client connection flags:

Flag Description
--cluster-name The cluster name to use to verify the cluster's identity. If the cluster has a cluster name, you must include this flag. For more information, see cockroach start.
--disable-cluster-name-verification Disables the cluster name check for this command. This flag must be paired with --cluster-name. For more information, see cockroach start.

See Client Connection Parameters for more details.

Logging

By default, the node command logs errors to stderr.

If you need to troubleshoot this command's behavior, you can change its logging behavior.

Response

The cockroach node subcommands return the following fields for each node.

node ls

Field Description
id The ID of the node.

node status

Field Description
id The ID of the node.

Required flag: None
address The address of the node.

Required flag: None
build The version of CockroachDB running on the node. If the binary was built from source, this will be the SHA hash of the commit used.

Required flag: None
locality The locality information specified for the node.

Required flag: None
updated_at The date and time when the node last recorded the information displayed in this command's output. When healthy, a new status should be recorded every 10 seconds or so, but when unhealthy this command's stats may be much older.

Required flag: None
started_at The date and time when the node was started.

Required flag: None
replicas_leaders The number of range replicas on the node that are the Raft leader for their range. See replicas_leaseholders below for more details.

Required flag: --ranges or --all
replicas_leaseholders The number of range replicas on the node that are the leaseholder for their range. A "leaseholder" replica handles all read requests for a range and directs write requests to the range's Raft leader (usually the same replica as the leaseholder).

Required flag: --ranges or --all
ranges The number of ranges that have replicas on the node.

Required flag: --ranges or --all
ranges_unavailable The number of unavailable ranges that have replicas on the node.

Required flag: --ranges or --all
ranges_underreplicated The number of underreplicated ranges that have replicas on the node.

Required flag: --ranges or --all
live_bytes The amount of live data used by both applications and the CockroachDB system. This excludes historical and deleted data.

Required flag: --stats or --all
key_bytes The amount of live and non-live data from keys in the key-value storage layer. This does not include data used by the CockroachDB system.

Required flag: --stats or --all
value_bytes The amount of live and non-live data from values in the key-value storage layer. This does not include data used by the CockroachDB system.

Required flag: --stats or --all
intent_bytes The amount of non-live data associated with uncommitted (or recently-committed) transactions.

Required flag: --stats or --all
system_bytes The amount of data used just by the CockroachDB system.

Required flag: --stats or --all
is_available If true, the node is currently available.

Required flag: None
is_live If true, the node is currently live.

For unavailable clusters (with an unresponsive Admin UI), running the node status command and monitoring the is_live field is the only way to identify the live nodes in the cluster. However, you need to run the node status command on a live node to identify the other live nodes in an unavailable cluster. Figuring out a live node to run the command is a trial-and-error process, so run the command against each node until you get one that responds.

See Identify live nodes in an unavailable cluster for more details.

Required flag: None
gossiped_replicas The number of replicas on the node that are active members of a range. After the decommissioning process completes, this should be 0.

Required flag: --decommission or --all
is_decommissioning If true, the node's range replicas are being transferred to other nodes. This happens when a live node is marked for decommissioning.

Required flag: --decommission or --all
is_draining If true, the node is being drained of in-flight SQL connections, new SQL connections are rejected, and the /health?ready=1 monitoring endpoint starts returning a 503 Service Unavailable status. This happens when a live node is being stopped.

Required flag: --decommission or --all

node decommission

Field Description
id The ID of the node.
is_live If true, the node is live.
replicas The number of replicas on the node that are active members of a range. After the decommissioning process completes, this should be 0.
is_decommissioning If true, the node's range replicas are being transferred to other nodes. This happens when a live node is marked for decommissioning.
is_draining If true, the node is being drained of in-flight SQL connections, new SQL connections are rejected, and the /health?ready=1 monitoring endpoint starts returning a 503 Service Unavailable status. This happens when a live node is being stopped.

node recommission

Field Description
id The ID of the node.
is_live If true, the node is live.
replicas The number of replicas on the node that are active members of a range. After the decommissioning process completes, this should be 0.
is_decommissioning If true, the node's range replicas are being transferred to other nodes. This happens when a live node is marked for decommissioning.
is_draining If true, the node is being drained of in-flight SQL connections, new SQL connections are rejected, and the /health?ready=1 monitoring endpoint starts returning a 503 Service Unavailable status. This happens when a live node is being stopped.

Examples

Setup

To follow along with the examples, start an insecure cluster, with localities defined.

List node IDs

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$ cockroach node ls --insecure
  id
+----+
   1
   2
   3
(3 rows)

Show the status of a single node

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$ cockroach node status 1 --host=localhost:26257 --insecure
  id |     address     |   sql_address   |                  build                  |            started_at            |           updated_at            |      locality       | is_available | is_live
+----+-----------------+-----------------+-----------------------------------------+----------------------------------+---------------------------------+---------------------+--------------+---------+
   1 | localhost:26257 | localhost:26257 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:54.308502+00:00 | 2019-10-01 20:05:43.85563+00:00 | region=us-east,az=1 | true         | true
(1 row)

Show the status of all nodes

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$ cockroach node status --host=localhost:26257 --insecure
  id |     address     |   sql_address   |                  build                  |            started_at            |            updated_at            |        locality        | is_available | is_live
+----+-----------------+-----------------+-----------------------------------------+----------------------------------+----------------------------------+------------------------+--------------+---------+
   1 | localhost:26257 | localhost:26257 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:54.308502+00:00 | 2019-10-01 20:06:15.356886+00:00 | region=us-east,az=1    | true         | true
   2 | localhost:26258 | localhost:26258 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:54.551761+00:00 | 2019-10-01 20:06:15.583967+00:00 | region=us-central,az=2 | true         | true
   3 | localhost:26259 | localhost:26259 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:55.178577+00:00 | 2019-10-01 20:06:16.204549+00:00 | region=us-west,az=3    | true         | true
(3 rows)

Identify live nodes in an unavailable cluster

The is_live and is_available fields are marked as true as long as a majority of the nodes are up, and a quorum can be reached:

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$ cockroach quit --host=localhost:26258 --insecure
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$ cockroach node status --host=localhost:26257 --insecure
  id |     address     |   sql_address   |                  build                  |            started_at            |            updated_at            |        locality        | is_available | is_live
+----+-----------------+-----------------+-----------------------------------------+----------------------------------+----------------------------------+------------------------+--------------+---------+
   1 | localhost:26257 | localhost:26257 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:54.308502+00:00 | 2019-10-01 20:07:04.857339+00:00 | region=us-east,az=1    | true         | true
   2 | localhost:26258 | localhost:26258 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:54.551761+00:00 | 2019-10-01 20:06:48.555863+00:00 | region=us-central,az=2 | false        | false
   3 | localhost:26259 | localhost:26259 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:55.178577+00:00 | 2019-10-01 20:07:01.207697+00:00 | region=us-west,az=3    | true         | true
(3 rows)

If a majority of nodes are down and a quorum cannot be reached, the is_live field is marked as true for the nodes that are up, but the is_available field is marked as false for all nodes:

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$ cockroach quit --host=localhost:26259 --insecure
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$ cockroach node status --host=localhost:26257 --insecure
  id |     address     |   sql_address   |                  build                  |            started_at            |            updated_at            |        locality        | is_available | is_live
+----+-----------------+-----------------+-----------------------------------------+----------------------------------+----------------------------------+------------------------+--------------+---------+
   1 | localhost:26257 | localhost:26257 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:54.308502+00:00 | 2019-10-01 20:07:37.464249+00:00 | region=us-east,az=1    | false        | true
   2 | localhost:26258 | localhost:26258 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:54.551761+00:00 | 2019-10-01 20:07:37.464259+00:00 | region=us-central,az=2 | false        | false
   3 | localhost:26259 | localhost:26259 | v19.2.0-alpha.20190606-2479-gd98e0839dc | 2019-10-01 20:04:55.178577+00:00 | 2019-10-01 20:07:37.464265+00:00 | region=us-west,az=3    | false        | false
(3 rows)
Note:

You need to run the node status command on a live node to identify the other live nodes in an unavailable cluster. Figuring out a live node to run the command is a trial-and-error process, so run the command against each node until you get one that responds.

Decommission nodes

See Decommission Nodes

Recommission nodes

See Recommission Nodes

See also



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