» Consul Agent Service Registration

Command: consul services register

The services register command registers a service with the local agent. This command returns after registration and must be paired with explicit service deregistration. This command simplifies service registration from scripts, in dev mode, etc.

This is just one method of service registration. Services can also be registered by placing a service definition in the Consul agent configuration directory and issuing a reload. This approach is easiest for configuration management systems that other systems that have access to the configuration directory. Clients may also use the HTTP API directly.

» Usage

Usage: consul services register [options] [FILE...]

This command can register either a single service using flags documented below, or one or more services using service definition files in HCL or JSON format. The service is registered against the specified Consul agent (defaults to the local agent). This agent will execute all registered health checks.

This command returns after registration succeeds. It must be paired with a deregistration command or API call to remove the service. To ensure that services are properly deregistered, it is highly recommended that a check is created with the DeregisterCriticalServiceAfter configuration set. This will ensure that even if deregistration failed for any reason, the agent will automatically deregister the service instance after it is unhealthy for the specified period of time.

Registered services are persisted in the agent state directory. If the state directory remains unmodified, registered services will persist across restarts.

» API Options

  • -ca-file=<value> - Path to a CA file to use for TLS when communicating with Consul. This can also be specified via the CONSUL_CACERT environment variable.

  • -ca-path=<value> - Path to a directory of CA certificates to use for TLS when communicating with Consul. This can also be specified via the CONSUL_CAPATH environment variable.

  • -client-cert=<value> - Path to a client cert file to use for TLS when verify_incoming is enabled. This can also be specified via the CONSUL_CLIENT_CERT environment variable.

  • -client-key=<value> - Path to a client key file to use for TLS when verify_incoming is enabled. This can also be specified via the CONSUL_CLIENT_KEY environment variable.

  • -http-addr=<addr> - Address of the Consul agent with the port. This can be an IP address or DNS address, but it must include the port. This can also be specified via the CONSUL_HTTP_ADDR environment variable. In Consul 0.8 and later, the default value is http://127.0.0.1:8500, and https can optionally be used instead. The scheme can also be set to HTTPS by setting the environment variable CONSUL_HTTP_SSL=true. This may be a unix domain socket using unix:///path/to/socket if the agent is configured to listen that way.

  • -tls-server-name=<value> - The server name to use as the SNI host when connecting via TLS. This can also be specified via the CONSUL_TLS_SERVER_NAME environment variable.

  • -token=<value> - ACL token to use in the request. This can also be specified via the CONSUL_HTTP_TOKEN environment variable. If unspecified, the query will default to the token of the Consul agent at the HTTP address.

» Service Registration Flags

The flags below should only be set if no arguments are given. If no arguments are given, the flags below can be used to register a single service.

Note that the behavior of each of the fields below is exactly the same as when constructing a standard service definition. Please refer to that documentation for full details.

  • -id - The ID of the service. This will default to -name if not set.

  • -name - The name of the service to register.

  • -address - The address of the service. If this isn't specified, it will default to the address registered with the local agent.

  • -port - The port of the service.

  • -meta key=value - Specify arbitrary KV metadata to associate with the service instance. This can be specified multiple times.

  • -tag value - Associate a tag with the service instance. This flag can be specified multiples times.

» Examples

To create a simple service:

$ consul services register -name=web

To create a service from a configuration file:

$ cat web.json
{
  "Service": {
    "Name": "web"
  }
}

$ consul services register web.json