247 lines
7.3 KiB
Plaintext
247 lines
7.3 KiB
Plaintext
---
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layout: docs
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page_title: Commands
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sidebar_title: Commands (CLI)
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description: >-
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Consul is controlled via a very easy to use command-line interface (CLI).
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Consul is only a single command-line application: `consul`. This application
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then takes a subcommand such as agent or members. The complete list of
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subcommands is in the navigation to the left.
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---
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# Consul Commands (CLI)
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Consul is controlled via a very easy to use command-line interface (CLI).
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Consul is only a single command-line application: `consul`. This application
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then takes a subcommand such as "agent" or "members". The complete list of
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subcommands is in the navigation to the left.
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The `consul` CLI is a well-behaved command line application. In erroneous
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cases, a non-zero exit status will be returned. It also responds to `-h` and `--help`
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as you'd most likely expect. And some commands that expect input accept
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"-" as a parameter to tell Consul to read the input from stdin.
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To view a list of the available commands at any time, just run `consul` with
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no arguments:
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```shell-session
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$ consul
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Usage: consul [--version] [--help] <command> [<args>]
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Available commands are:
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acl Interact with Consul's ACLs
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agent Runs a Consul agent
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catalog Interact with the catalog
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connect Interact with Consul Connect
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debug Records a debugging archive for operators
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event Fire a new event
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exec Executes a command on Consul nodes
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force-leave Forces a member of the cluster to enter the "left" state
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info Provides debugging information for operators.
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intention Interact with Connect service intentions
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join Tell Consul agent to join cluster
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keygen Generates a new encryption key
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keyring Manages gossip layer encryption keys
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kv Interact with the key-value store
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leave Gracefully leaves the Consul cluster and shuts down
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lock Execute a command holding a lock
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login Login to Consul using an auth method
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logout Destroy a Consul token created with login
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maint Controls node or service maintenance mode
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members Lists the members of a Consul cluster
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monitor Stream logs from a Consul agent
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operator Provides cluster-level tools for Consul operators
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reload Triggers the agent to reload configuration files
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rtt Estimates network round trip time between nodes
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services Interact with services
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snapshot Saves, restores and inspects snapshots of Consul server state
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tls Builtin helpers for creating CAs and certificates
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validate Validate config files/directories
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version Prints the Consul version
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watch Watch for changes in Consul
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```
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To get help for any specific command, pass the `-h` flag to the relevant
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subcommand. For example, to see help about the `join` subcommand:
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```shell-session
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$ consul join -h
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Usage: consul join [options] address ...
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Tells a running Consul agent (with "consul agent") to join the cluster
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by specifying at least one existing member.
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HTTP API Options
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-http-addr=<address>
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The `address` and port of the Consul HTTP agent. The value can be
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an IP address or DNS address, but it must also include the port.
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This can also be specified via the CONSUL_HTTP_ADDR environment
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variable. The default value is http://127.0.0.1:8500. The scheme
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can also be set to HTTPS by setting the environment variable
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CONSUL_HTTP_SSL=true.
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-token=<value>
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ACL token to use in the request. This can also be specified via the
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CONSUL_HTTP_TOKEN environment variable. If unspecified, the query
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will default to the token of the Consul agent at the HTTP address.
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Command Options
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-wan
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Joins a server to another server in the WAN pool.
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```
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## Autocompletion
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The `consul` command features opt-in subcommand autocompletion that you can
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enable for your shell with `consul -autocomplete-install`. After doing so,
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you can invoke a new shell and use the feature.
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For example, assume a tab is typed at the end of each prompt line:
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```shell-session
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$ consul e
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event exec
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$ consul r
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reload rtt
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$ consul operator raft
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list-peers remove-peer
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```
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## Environment Variables
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In addition to CLI flags, Consul reads environment variables for behavior
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defaults. CLI flags always take precedence over environment variables, but it
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is often helpful to use environment variables to configure the Consul agent,
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particularly with configuration management and init systems.
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These environment variables and their purpose are described below:
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### `CONSUL_HTTP_ADDR`
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This is the HTTP API address to the _local_ Consul agent
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(not the remote server) specified as a URI with optional scheme:
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```
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CONSUL_HTTP_ADDR=127.0.0.1:8500
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```
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or as a Unix socket path:
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```
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CONSUL_HTTP_ADDR=unix:///var/run/consul_http.sock
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```
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If the `https://` scheme is used, `CONSUL_HTTP_SSL` is implied to be true.
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### `CONSUL_HTTP_TOKEN`
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This is the API access token required when access control lists (ACLs)
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are enabled, for example:
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```
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CONSUL_HTTP_TOKEN=aba7cbe5-879b-999a-07cc-2efd9ac0ffe
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```
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### `CONSUL_HTTP_TOKEN_FILE`
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This is a path to a file containing the API access token required when access
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control lists (ACLs) are enabled, for example:
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```
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CONSUL_HTTP_TOKEN_FILE=/path/to/consul.token
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```
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### `CONSUL_HTTP_AUTH`
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This specifies HTTP Basic access credentials as a username:password pair:
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```
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CONSUL_HTTP_AUTH=operations:JPIMCmhDHzTukgO6
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```
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### `CONSUL_HTTP_SSL`
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This is a boolean value (default is false) that enables the HTTPS URI
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scheme and SSL connections to the HTTP API:
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```
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CONSUL_HTTP_SSL=true
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```
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### `CONSUL_HTTP_SSL_VERIFY`
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This is a boolean value (default true) to specify SSL certificate verification;
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setting this value to `false` is not recommended for production use. Example for
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development purposes:
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```
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CONSUL_HTTP_SSL_VERIFY=false
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```
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### `CONSUL_CACERT`
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Path to a CA file to use for TLS when communicating with Consul.
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```
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CONSUL_CACERT=ca.crt
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```
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### `CONSUL_CAPATH`
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Path to a directory of CA certificates to use for TLS when communicating with Consul.
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```
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CONSUL_CAPATH=ca_certs/
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```
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### `CONSUL_CLIENT_CERT`
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Path to a client cert file to use for TLS when `verify_incoming` is enabled.
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```
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CONSUL_CLIENT_CERT=client.crt
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```
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### `CONSUL_CLIENT_KEY`
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Path to a client key file to use for TLS when `verify_incoming` is enabled.
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```
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CONSUL_CLIENT_KEY=client.key
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```
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### `CONSUL_TLS_SERVER_NAME`
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The server name to use as the SNI host when connecting via TLS.
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```
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CONSUL_TLS_SERVER_NAME=consulserver.domain
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```
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### `CONSUL_GRPC_ADDR`
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Like [`CONSUL_HTTP_ADDR`](#consul_http_addr) but configures the address the
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local agent is listening for gRPC requests. Currently gRPC is only used for
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integrating [Envoy proxy](/docs/connect/proxies/envoy) and must be [enabled
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explicitly](/docs/agent/options#grpc_port) in agent configuration.
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```
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CONSUL_GRPC_ADDR=127.0.0.1:8502
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```
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or as a Unix socket path:
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```
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CONSUL_GRPC_ADDR=unix://var/run/consul_grpc.sock
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```
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If the agent is [configured with TLS
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certificates](/docs/agent/encryption#rpc-encryption-with-tls), then the
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gRPC listener will require TLS and present the same certificate as the https
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listener. As with `CONSUL_HTTP_ADDR`, if TLS is enabled either the `https://`
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scheme should be used, or `CONSUL_HTTP_SSL` set.
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