stratis - Man Page

stratis [GLOBAL OPTIONS] pool <command> [args] [COMMAND OPTIONS]
stratis [GLOBAL OPTIONS] filesystem|fs <command> [args] [COMMAND OPTIONS]
stratis [GLOBAL OPTIONS] blockdev <command> [args] [COMMAND OPTIONS]
stratis [GLOBAL OPTIONS] key <command> [args] [COMMAND OPTIONS]
stratis [GLOBAL OPTIONS] report <report_name>
stratis [GLOBAL OPTIONS] daemon <version>

stratis is a command-line tool to create, modify, and destroy Stratis pools, and the filesystems allocated from the pool.

Stratis creates a pool from one or more block devices (blockdevs), and then enables multiple filesystems to be created from the pool. The user can set keys for use with pool encryption.

--version

Show stratis-cli version.

--help,  -h

Show help on command.

--propagate

(For debugging.) Allow exceptions raised during execution to propagate.

--unhyphenated-uuids

(For listing.) Print pool and filesystem UUIDs without hyphens for list commands.

pool create [--key-desc <key_desc>] [--clevis <(nbde|tang|tpm2)> [--tang-url <tang_url>] [<(--thumbprint <thp> | --trust-url)>] [--no-overprovision] <pool_name> <blockdev> [<blockdev>..]

Create a pool from one or more block devices, with the given pool name.

pool stop <(--uuid <uuid> |--name <name>)>

Stop a pool, specifying the pool by its UUID or by its name. Tear down the storage stack but leave all metadata intact.

pool start <(--uuid <uuid> |--name <name>)> --unlock-method <(keyring | clevis)>

Start a pool, specifying the pool by its UUID or by its name. Use the --unlock-method option to specify method of unlocking the pool if it is encrypted.

pool list [--stopped] [(--uuid <uuid> |--name <name>)]

List pools. If the --stopped option is used, list only stopped pools. Otherwise, list only started pools. If a UUID or name is specified, print more detailed information about the pool corresponding to that UUID or name.

pool rename <old_pool_name> <new_pool_name>

Rename a pool.

pool destroy <pool_name>

Destroy a pool and all the filesystems created from it.

pool add-data <pool_name> <blockdev> [<blockdev>..]

Add one or more blockdevs to an existing pool, to enlarge its storage capacity.

pool init-cache <pool_name> <blockdev> [<blockdev>..]

Initialize a cache for an existing pool. Add one or more blockdevs to a pool, to be used as cache instead of additional storage. Typically, smaller and faster drives, such as SSDs, are used for this purpose.

pool add-cache <pool_name> <blockdev> [<blockdev>..]

Add one or more blockdevs to an existing pool with an initialized cache.

pool extend-data <pool_name> [--device-uuid <uuid>]

Increase the pool’s data capacity with additional storage space offered by its component data devices through, e.g., expansion of a component RAID device. Devices may be specified by their Stratis UUID. If no devices are specified, then stratisd will attempt to make use of all data devices belonging to the pool that appear to have been expanded.

pool bind <(nbde|tang)> <pool name> <url> <(--thumbprint <thp> | --trust-url)>

Bind the devices in the specified pool to a supplementary encryption mechanism that uses NBDE (Network-Bound Disc Encryption). tang is an alias for nbde.

pool bind tpm2 <pool name>

Bind the devices in the specified pool to a supplementary encryption mechanism that uses TPM 2.0 (Trusted Platform Module).

pool bind keyring <pool name> <keydesc>

Bind the devices in the specified pool to a supplementary encryption mechanism using a key in the kernel keyring.

pool rebind clevis <pool name>

Rebind the devices in the specified pool using the Clevis configuration with which the devices in the pool were previously bound.

pool rebind keyring <pool_name> <keydesc>

Rebind the devices in the specified pool using the specified key description.

pool unbind <(clevis|keyring)> <pool name>

Unbind the devices in the specified pool from the specified encryption mechanism.

pool set-fs-limit <pool name> <amount>

Set the limit on the number of file systems allowed per-pool. This number may only be increased from its current value.

pool overprovision <pool name> <(yes|no)>

Set overprovisioning mode. If set to "yes", the pool may allow overprovisioning, i.e, the sum of the logical sizes of the Stratis filesystems supported by the pool may exceed the amount of data space available.

pool explain <code>

Explain any code that might show up in the Alerts column when listing a pool. Codes may be prefixed with an "I" for "info", a "W" for "warning", or an "E" for "error".

pool debug get-object-path <(--uuid <uuid> |--name <name>)>

Look up the D-Bus object path for a pool given the UUID or name.

pool debug get-metadata [--pretty] [--written] <(--uuid <uuid> |--name <name>)>

Get the pool-level metadata for the specified pool. If --written is not set, get metadata that would be written if metadata were written now, otherwise get the most recently written metadata. If --pretty is set, format prettily, otherwise print all on one line.

filesystem create <pool_name> <fs_name> [<fs_name>..] [--size <size>] [--size-limit <size_limit>]

Create one or more filesystems from the specified pool. If the --size option is specified, make each filesystem the specified size. Otherwise, accept the stratisd default. if the --size-limit option is specified, set the filesystem’s size limit on creation. If the size limit is not set, the filesystem will be grown, as needed, up to the maximum possible size. The filesystem size limit must be at least as large as the filesystem size. NOTE: There is a temporary restriction on the number of filesystems that can be specified with this command. Specifying more than one filesystem will result in an error.

filesystem snapshot <pool_name> <fs_name> <snapshot_name>

Snapshot the filesystem in the specified pool.

filesystem list [pool_name]

List all filesystems that exist in the specified pool, or all pools, if no pool name is given.

filesystem destroy <pool_name> <fs_name> [<fs_name>..]

Destroy one or more filesystems that exist in the specified pool.

filesystem rename <pool_name> <fs_name> <new_name>

Rename a filesystem.

filesystem set-size-limit <pool_name> <fs_name> <size_limit>

Set the filesystem size limit. Must be at least as large as the filesystem’s current size. To set the size limit to the same value as the filesystem’s current size, use the keyword "current".

filesystem unset-size-limit <pool_name> <fs_name>

Remove a filesystem size limit previously set.

filesystem schedule-revert <pool_name> <snapshot_name>

Set a flag so that when the pool is next started, the specified snapshot will overwrite its origin filesystem.

filesystem cancel-revert <pool_name> <snapshot_name>

Cancel a scheduled revert.

filesystem debug get-object-path <(--uuid <uuid> |--name <name>)>

Look up the D-Bus object path for a filesystem given the UUID or name.

filesystem debug get-metadata <pool_name> [--pretty] [--written] [--fs-name <fs-name>]

Get the filesystem metadata for the specified pool and optionally specified filesystem. If --written is not set, get metadata that would be written if metadata were written now, otherwise get the most recently written metadata. If --pretty is set, format prettily, otherwise print all on one line.

blockdev list [pool_name]

List all blockdevs that make up the specified pool, or all pools, if no pool name is given.

blockdev debug get-object-path <(--uuid <uuid>)>

Look up the D-Bus object path for a blockdev given the UUID.

key list

List all key-descriptions in the kernel keyring that can be used for encryption.

key set <(--keyfile-path <path> | --capture-key)> <key_desc>

Set a key in the kernel keyring for use with encryption.

key reset <(--keyfile-path <path> | --capture-key)> <key_desc>

Reset the key data of an existing key in the kernel keyring.

key unset <key_desc>

Unset a key in the kernel keyring so it is no longer available for encryption operations.

report <report_name> [--no-sort-keys]

Get a report from the daemon regarding its internal state. The engine_state_report name will be supported in future releases. Any other report name should be considered unstable and may be removed in a future release. The JSON schema of any report must always be considered unstable. The keys in the JSON schema are sorted in the output, unless the --no-sort-keys option is set.

daemon version

Show the Stratis service’s version.

debug refresh

For all pools that are not stopped, rebuild their storage stacks from the pool-level metadata stored on each pool’s devices. This is not a standard administrative command; it is intended for trouble-shooting and repair only.

--key-desc

The key description of the key that should be used to encrypt the created pool. The key description must correspond to a key set in the kernel keyring with the key command.

--keyfile-path <path> | --capture-key

These mutually exclusive options allow a user to specify a key used for encryption in one of two ways. The --keyfile-path option requires an argument, the path to a file containing the key. If the --capture-key option is selected instead, the user must enter the key at the ensuing prompt. The key value is terminated at the first newline character that the user enters, and does not include the newline character. On the other hand, if the file specified as an argument for the --keyfile-path option contains a newline character anywhere, the newline character will be included in the key value.

--thumbprint <thp> | --trust-url

These mutually exclusive options allow a user to specify that a tang server’s URL should be trusted and the server’s credentials accepted without verification, or to supply a previously provided thumbprint for verification.

--tang-url <url>

If creating a pool encrypted via NBDE using a tang server, specifies the URL of the server.

--clevis <(nbde | tang | tpm2)>

The clevis method that should be used to encrypt the created pool.

--no-overprovision

Do not allow the pool to allocate more logical space for its filesystems than it has physical space available.

--size <size spec>

Used to specify the size of, e.g., a filesystem. The specification format must follow the standard size specification format for input (see below).

The format of a size specification is '<magnitude><unit specifier>'
where the magnitude must be a decimal integer and the unit specifier
may be any of 'B', 'KiB', 'MiB', 'GiB', 'TiB'. or 'PiB'.

STRATIS_DBUS_TIMEOUT

Sets a timeout for any Stratis D-Bus call. If this environment variable is not set, a default value of 120 seconds is used for the timeout. The accepted STRATIS_DBUS_TIMEOUT environment variable values are:

1. an integer between 0 (inclusive) and 1073741823 (inclusive), which represents the timeout length in milliseconds
2. -1, which represents the libdbus default timeout

FIELDS for stratis pool list

Name

The name of the pool.

Total / Used / Free

The physical usage statistics for the pool.

Properties

Boolean valued properties that the pool may have. Each property has a two-letter camel-case code. If the pool does not have the property, a ~, for negation, is prepended to the property code. If the engine experienced an error when obtaining the property, a "?", representing "unknown", is prepended to the property code. The property codes are: Ca - indicates the pool has a cache, Cr - indicates the pool is encrypted, Op - indicates the pool allows overprovisioning.

UUID

The UUID of the pool.

Alerts

Any unusual or urgent information about the pool of which the user should be made aware.

FIELDS for stratis pool list --stopped

Name

The name of the pool.

UUID

The UUID of the pool.

# Devices

The number of devices used by the pool.

Key Description

The kernel key description used by the pool.

Clevis

The status of Clevis encryption ("present" or "N/A").

FIELDS for stratis pool list [(--uuid <uuid> |--name <name>)]

UUID

The UUID of the pool.

Name

The name of the pool.

Alerts

A list of all alerts on the pool, as a text summary.

Actions Allowed

What actions may be taken on the pool. Generally the pool will be listed as fully operational.

Cache

Whether or not the pool has a cache.

Filesystem Limit

The maximum number of filesystems the pool allows.

Allows Overprovisioning

Whether or not the pool allows overprovisioning.

Key Description

The key description, if the pool is encrypted using a key in the kernel keyring.

Clevis Configuration

The Clevis configuration, if the pool is encrypted via Clevis.

Space Usage: Fully Allocated

Whether or not all the space on a pool’s devices has been allocated for some purpose.

Space Usage: Size

The total size of all the devices in the pool.

Space Usage: Allocated

The space on the devices allocated for some purpose, e.g., to store Stratis filesystem metadata or user data. Once space has been allocated for one purpose, it can not, in general, be reclaimed and used for another purpose.

Space Usage: Used

The space on the devices that is in use. Used space can be reclaimed. For example, destroying a Stratis filesystem will reduce this value.

FIELDS for stratis filesystem list

Pool

The name of the pool containing the filesystem.

Filesystem

The name of the filesystem.

Total / Used / Free

The size of the filesystem.

Created

The time the filesystem was created.

Device

The device path to use for mounting the filesystem.

UUID

The UUID of the filesystem.

FIELDS for stratis filesystem list [(--uuid <uuid> |--name <name>)]

UUID

The UUID of the filesystem.

Name

The name of the filesystem.

Pool

The name of the filesystem’s pool.

Device

The device path to use for mounting the filesystem.

Created

The time the filesystem was created.

Snapshot origin

If this filesystem is a snapshot, its origin. If the filesystem is a snapshot, whether or not it is scheduled to replace its origin next time the pool is started.

Sizes

The logical size of the Stratis filesystem, the total space actually used, and the logical amount free on the Stratis filesystem. Since every Stratis filesystem holds an XFS filesystem, a new Stratis filesystem will have a non-zero amount used for the XFS filesystem metadata.

FIELDS for stratis blockdev list

Pool Name

The name of the pool using the block device.

Device Node

The device node of the block device. A second device node will be displayed in parentheses if the block device is encrypted. This device node is the device node of the associated dm-crypt device.

Physical Size

The total size of the device on which stratisd places Stratis metadata. If the device is encrypted, this size will be slightly smaller than the total size of the device specified by the user; it will be the size of the associated dm-crypt device. A second size will be displayed in parentheses if stratisd has observed that the device has a size that is different from the size that stratisd is making use of. This can happen if, e.g., a RAID device was previously added to a pool and has since been expanded.

Tier

The data tier type ("Data" or "Cache")

UUID

The UUID of the block device.

FIELDS for stratis key list

Key Description

Encryption and a cache are mutually exclusive choices. If a pool is encrypted, an attempt to initialize a cache will result in an error.

There is a restriction on the total size of the cache device of 32 TiB. Adding devices to the cache so that the cumulative size of all the devices in the cache exceeds 32 TiB will result in an error.

If a block device appears to be already in use, stratisd will refuse to claim it. To allow use with stratisd, any signature on the device must first be erased. Please carefully verify the identity and availability of the device before taking such a step.

Example 1. Creating a Stratis pool

stratis pool create mypool /dev/sdb /dev/sdc

Example 2. Creating an encrypted pool

stratis key set --capture-key someKeyDescription

stratis pool create --key-desc someKeyDescription mypool /dev/sdb /dev/sdc

Example 3. Creating a filesystem from a pool

stratis filesystem create mypool data1

Example 4. Binding a pool’s devices to use an NBDE policy for decryption

stratis pool bind nbde --trust-url mypool someTangServerUrl

mount(8), umount(8), fstab(5)

GitHub for issues and development

https://github.com/stratis-storage/project/issues

Mailing list

stratis-devel@lists.fedorahosted.org for general development discussion

Unknown values

If the stratisd D-Bus API returns values that stratis-cli cannot interpret, stratis-cli will substitute "???". If encountered, upgrading to the latest version of stratis-cli, or filing an issue, is recommended.

Unobtainable values

If the stratisd D-Bus API indicates that a value is unobtainable, stratis-cli will substitute "FAILURE". This may indicate something wrong with the pool, blockdev, or filesystem. In some cases, restarting stratisd may resolve the issue.

stratis-cli is licensed under the Apache License, Version 2.0. Software distributed under this license is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either expressed or implied.

stratisd(8), stratis-dumpmetadata(8).