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MemSQL Helios does not support this command.

Register a host.


Registers a host in the cluster.

This command will write the host name and SSH details to the state file
maintained by memsql-toolbox.

The --host flag provides SSH connection details for this host.
The value follows standard SSH format [username@]hostname[:port].
The hostname portion of this value will be used as the cluster-addressable
hostname if '--cluster-hostname' is not also specified.

The --cluster-hostname provides the ability to override the cluster hostname
for the host they are registering. Tools will use this value when configuring
intra-node communication.  Only specify the cluster hostname without other metadata
such as username or port, i.e., memsql-abc.domain rather than

The --identity-file flag provides an optional SSH private key to be used to
connect to the host.

  memsql-toolbox-config register-host [flags]

      --allow-duplicate-host-fingerprints   Whether to allow hosts with identical SSH host keys. (ADVANCED)
      --cluster-hostname SSH_ADDRESS        The cluster-addressable hostname for this host. Tools will use this value to configure intra-node communication. Specify the hostname without additional parameters (e.g., memsql-abc.domain instead of memsql-abc.domain:3306)
  -h, --help                                Help for register-host
      --host SSH_ADDRESS                    SSH connection details for this host in the standard SSH [username@]hostname[:port] format. The hostname value will be used as the cluster-addressable hostname if '--cluster-hostname' is not specified
  -i, --identity-file ABSOLUTE_PATH         The identity file for the host
      --localhost                           Whether this instance of Toolbox is located on the host
      --memsqlctl-config-path string        The path to the memsqlctl.hcl file on the target host. (ADVANCED)
      --memsqlctl-path string               The path to the memsqlctl binary on the target host. (ADVANCED)
      --skip-validation                     Skip validation of --memsqlctl-path and --memsqlctl-config-path
      --tar-install-dir string              The directory to use for tar packages on the target host. (ADVANCED)
      --tar-install-state string            The path to the packages.hcl file on the target host. (ADVANCED)

Global Flags:
      --backup-cache FILE_PATH              File path for the backup cache
      --cache-file FILE_PATH                File path for the Toolbox node cache
  -c, --config FILE_PATH                    Toolbox configuration file path
      --disable-spinner                     Disable the progress spinner, which some terminal sessions/environments may have issues with
  -j, --json                                Enable JSON output
      --parallelism POSITIVE_INTEGER        Maximum number of operations to run in parallel
      --runtime-dir DIRECTORY_PATH          Where to store Toolbox runtime data
      --ssh-max-sessions POSITIVE_INTEGER   Maximum number of SSH sessions to open per host, must be at least 3
      --state-file FILE_PATH                Toolbox state file path
  -v, --verbosity count                     Increase logging verbosity: valid values are 1, 2, 3. Usage -v=count or --verbosity=count
  -y, --yes                                 Enable non-interactive mode and assume the user would like to move forward with the proposed actions by default


  1. This command is interactive unless you use either the --yes or --json flags to override interactive behavior.

  2. Include the --tar-install-state <state-file-name-including-path> option to specify where to write the tarInstallState file on a host, which can be outside of the tarInstallDir.

    By default, this file is named packages.hcl and resides in the tar install directory as specified by the --tar-install-dir option, which is the recommended configuration.


The following example uses the register-host command to register the current local host machine as a host for cluster deployment.

memsql-toolbox-config register-host --host node-1 --localhost
Toolbox is about to register the following host:
  · Host: node-1
  · Localhost: true

Would you like to continue? [y/N]: y
✓ Successfully registered host node-1
|      Host      | Local Host | SSH address | Identity File |
| node-1         | Yes        |             |               |