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Command: volume register

The volume register command registers external storage volumes with Nomad's Container Storage Interface (CSI) support. The volume must exist on the remote storage provider before it can be registered and used by a task.

CSI plugins that implement the Controller interface can be created via the volume create command, which will automatically register the volume as well.

Usage

nomad volume register [options] [file]

The volume register command requires a single argument, specifying the path to a file containing a valid volume specification. This file will be read and the job will be submitted to Nomad for scheduling. If the supplied path is "-", the job file is read from STDIN. Otherwise it is read from the file at the supplied path.

When ACLs are enabled, this command requires a token with the csi-write-volume capability for the volume's namespace.

General Options

  • -address=<addr>: The address of the Nomad server. Overrides the NOMAD_ADDR environment variable if set. Defaults to http://127.0.0.1:4646.

  • -region=<region>: The region of the Nomad server to forward commands to. Overrides the NOMAD_REGION environment variable if set. Defaults to the Agent's local region.

  • -namespace=<namespace>: The target namespace for queries and actions bound to a namespace. Overrides the NOMAD_NAMESPACE environment variable if set. If set to '*', subcommands which support this functionality query all namespaces authorized to user. Defaults to the "default" namespace.

  • -no-color: Disables colored command output. Alternatively, NOMAD_CLI_NO_COLOR may be set. This option takes precedence over -force-color.

  • -force-color: Forces colored command output. This can be used in cases where the usual terminal detection fails. Alternatively, NOMAD_CLI_FORCE_COLOR may be set. This option has no effect if -no-color is also used.

  • -ca-cert=<path>: Path to a PEM encoded CA cert file to use to verify the Nomad server SSL certificate. Overrides the NOMAD_CACERT environment variable if set.

  • -ca-path=<path>: Path to a directory of PEM encoded CA cert files to verify the Nomad server SSL certificate. If both -ca-cert and -ca-path are specified, -ca-cert is used. Overrides the NOMAD_CAPATH environment variable if set.

  • -client-cert=<path>: Path to a PEM encoded client certificate for TLS authentication to the Nomad server. Must also specify -client-key. Overrides the NOMAD_CLIENT_CERT environment variable if set.

  • -client-key=<path>: Path to an unencrypted PEM encoded private key matching the client certificate from -client-cert. Overrides the NOMAD_CLIENT_KEY environment variable if set.

  • -tls-server-name=<value>: The server name to use as the SNI host when connecting via TLS. Overrides the NOMAD_TLS_SERVER_NAME environment variable if set.

  • -tls-skip-verify: Do not verify TLS certificate. This is highly not recommended. Verification will also be skipped if NOMAD_SKIP_VERIFY is set.

  • -token: The SecretID of an ACL token to use to authenticate API requests with. Overrides the NOMAD_TOKEN environment variable if set.

Volume Specification

The volume specification is documented in the Volume Specification page.

Not all fields can be updated after the volume is registered:

  • The capacity_min and capacity_max fields can be updated, and may increase the volume size if the CSI plugin supports it. Expansion may or may not be possible while the volume is in use, again depending on the plugin. Reducing volume capacity is not allowed per the CSI spec.
  • The capability blocks can be added or removed, but only if the capability is not currently in use by a mounted volume.
  • The mount_options block can be updated if the volume is not in use.
  • The secrets block can be updated.
  • The context block can be updated. The values for this field are typically provided by the CSI plugin, and should not be updated unless recommended by the CSI plugin's documentation.
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