globus-connect-server storage-gateway create google-cloud-storage - Create a Google Cloud Storage Gateway



The globus-connect-server storage-gateway create command creates a new storage gateway. When creating a storage gateway, provide the policies to access a storage system via Globus Connect Server collections.

The Google Cloud Storage connector provides access to data stored in Google’s distributed object store. Before creating a Google Cloud Storage storage gateway, follow the instructions in the connector configuration manual to create the Google application with permissions to access storage.

Authentication Policies

There are three command-line options that control which user identities are allowed access to the data on a storage gateway: --domain, --authentication-timeout-mins, and --high-assurance.

The value of the --domain command-line option restricts access to users who have an identity in the given domain. This may be configured to be multiple values to allow authentication by multiple identity providers. If more than one domain is allowed, the storage gateway needs to have an identity mapping method configured to decide how to process names from the different identity namespaces. See Identity Mapping Policies for more information.

The value of the --authentication-timeout-mins command-line option defines the timeout (in minutes) after which a user will need to re-authenticate in order to access mapped collections on non high assurance storage gateways or for any data access on high assurance storage gateways. If this is not supplied, the default value of this timeout is 11 days.

The value of the --high-assurance command-line option defines whether the storage gateway manages high assurance data. If it is set, then the authentication timeout is enforced on per application sessions.

Identity Mapping Policies

Globus Connect Server v5.4 supports a flexible system for mapping user identity information in Globus to the local account needed to access data on a variety of storage systems. This includes a default mapping for cases where there is only one allowed domain, as well as pattern-based mappings and callouts to external programs for custom mapping algorithms.

Default Identity to Username Mapping

Custom Identity to Username Mapping

The --identity-mapping command-line option configures a storage gateway to use either an expression based identity mapping or an external identity mapping program. See the Identity Mapping Guide for more information.

The --identity-mapping command-line option can be passed on the command-line with a few different types of data as its arguments:

--identity-mapping external:CMD

When mapping a identity to a username, Globus Connect Server invokes the command-line program CMD to map the identity. The value of the CMD string will be parsed as a shell command-line, so arguments may be included if quoted. A full description of the input, output, and arguments to the program are included in Identity Mapping Guide.

--identity-mapping file:JSON_FILE
--identity-mapping JSON

The JSON_FILE argument is a path to a file which contains a JSON document containing the mapping configuration, as described in the Identity Mapping Guide. The JSON argument is the json document itself.

User Policies

The --user-allow and --user—​deny command-line options control which users may access data on a storage gateway. These operate on the result of the identity mapping, a user name that is in the namespace of storage gateway. This may be a user name, id, or email address based on the storage gateway requirements.

A username is allowed or denied access depending on whether the --user-allow and --user—​deny command-line option are set on a storage gateway, and whether the username is present in one or both of those policies. In general, if a username is in the value of --user—​deny it is always denied, and if a --user-allow policy is provided the username must be in the policy value in order to be allowed access.

The full set of effects of these policies are contained in the following table:

--user-allow --user—​deny result





not a member






not a member





not a member



not a member

not a member


not a member






Google Cloud Storage Policies

The Google Cloud Storage connector has policies to manage application credentials, restrictions for accessing buckets, and restrictions to which projects user accounts must be a member of.

Application Credentials

The --google-client-id and --google-client-secret command-line options provide information for Globus Connect Server to authenticate with Google Cloud Storage. These are configured by setting up the application project as described in the Google Cloud Storage Connector configuration guide.

Bucket Restrictions and Visibility

The --bucket command-line option value is the name of buckets which are allowed access by this storage gateway. If no buckets are explicitly configured, then any buckets accessible using the user’s credential may be accessed by collections on this storage gateway. If any are configured, then they act as restrictions to which buckets are visible and accessible on collections on this storage gateway.


You can also use the data access command-line options to restrict access to buckets.


All accesses to Google Cloud Storage require a project to be associated with the API calls. Set the value of the --google-cloud-storage-project policy to be the list of projects which are authorized to be used by the connector. If this list is not configured or is empty, any google cloud project may be used when creating a mapped collection; otherwise the project must be a member of this list.

Data Access Policies

The --restrict-paths command-line option controls access to subtrees of the data provided by the storage gateway. This is configured using the PathRestrictions document type.

Path restrictions provide a framework for administrators to constrain data access on the storage gateway. Restrictions can be set at the folder level. They may allow read, write, or deny access to data. These are absolute paths from the root of the storage gateway virtual file system.


-h, --help

Show help message and exit.


Show the version and exit.

-F, --format "text"|"json"

Output format for this command. If the format is json, then the resulting role document is displayed.

--user-deny username

Connector-specific username for a user denied access to this Storage Gateway. Give this option multiple times to deny multiple users. Set a value of "" to clear this value.

--user-allow username

Connector-specific username for a user allowed access to this Storage Gateway. Give this option multiple times to allow multiple users. Set a value of "" to clear this value.

--identity-mapping external:CMD
--identity-mapping file:JSON_FILE | JSON

Identity Mapping configuration for use in this Storage Gateway. You can use JSON input to specify a complete mapping document, or, if you want to use an external command for mapping, use external:command --arguments. Give this option multiple times to set multiple mappings in order of precedence. Set a value of null to clear this value.

--restrict-paths JSON | file:JSON_FILE

Path restrictions for accessing data on collections created using this storage gateway.

--domain DOMAIN

Allowed domain. Give this option multiple times to allow multiple domains. Users creating credentials or collections on this storage gateway must have an identity in one of these domains.

--authentication-timeout-mins INT

Timeout (in minutes) during which a user is required to have authenticated in a session to access this storage gateway.


Flag indicating that High Assurance features are required on this storage gateway.

--google-cloud-storage-project PROJECT

Project this storage gateway is allowed to access. Give this option multiple times to allow multiple projects.

--google-client-id CLIENT_ID

The client ID of the google application that Globus Connect Server will be accessing the Google Cloud Storage resource as.

--google-client-secret SECRET

The application secret associated with the client_id.

--bucket BUCKET

Bucket to include in the root of the Storage Gateway. Give this option multiple times to include multiple buckets. If not specified, any bucket on the Google Cloud Storage endpoint which a user’s credentials can access may be accessed via this storage gateway.