xvc storage new minio

Purpose

Create a new Xvc storage on a MinIO instance. It allows to store tracked file contents in a Minio server.

Synopsis

$ xvc storage new minio --help
Add a new Minio storage

Reads credentials from `MINIO_ACCESS_KEY` and `MINIO_SECRET_ACCESS_KEY` environment variables. Alternatively you can use `XVC_STORAGE_ACCESS_KEY_ID_<storage_name>` and `XVC_STORAGE_SECRET_ACCESS_KEY_<storage_name>` environment variables if you have multiple storages of this type.

Usage: xvc storage new minio [OPTIONS] --name <NAME> --endpoint <ENDPOINT> --bucket-name <BUCKET_NAME> --region <REGION>

Options:
  -n, --name <NAME>
          Name of the storage

          This must be unique among all storages of the project

      --endpoint <ENDPOINT>
          Minio server url in the form https://myserver.example.com:9090

      --bucket-name <BUCKET_NAME>
          Bucket name

      --region <REGION>
          Region of the server

      --storage-prefix <STORAGE_PREFIX>
          You can set a directory in the bucket with this prefix

          [default: ]

  -h, --help
          Print help (see a summary with '-h')

Examples

Before calling any commands that use this storage, you must set the following environment variables.

MINIO_ACCESS_KEY_ID or XVC_STORAGE_ACCESS_KEY_ID_<storage_name>: The access key of the Digital Ocean account. The second form is used when you have multiple Digital Ocean accounts and you want to use a specific one.
MINIO_SECRET_ACCESS_KEY or XVC_STORAGE_SECRET_ACCESS_KEY_<storage_name>: The secret key of the Digital Ocean account. The second form is used when you have multiple Digital Ocean accounts and you want to use a specific one.

The command works only in Xvc repositories.

$ git init
...
$ xvc init

$ xvc-test-helper create-directory-tree --directories 1 --files 3  --seed 20230211

$ tree dir-0001
dir-0001
├── file-0001.bin
├── file-0002.bin
└── file-0003.bin

1 directory, 3 files

Xvc only sends and receives tracked files.

$ xvc file track dir-0001

You can define a storage bucket as storage and begin to use it.

$ xvc storage new minio --name backup --endpoint http://emresult.com:9000 --bucket-name one --region us-east-1 --storage-prefix xvc

Send files to this storage.

$ xvc file send dir-0001 --to backup

You can remove the files you sent from your cache and workspace.

$ xvc file remove --from-cache dir-0001/
[DELETE] [CWD]/.xvc/b3/1bc/b82/80fcea6acf2362a4ec4ef8512fe2f791f412fed1635009293abedcad88/0.bin
[DELETE] [CWD]/.xvc/b3/1bc/b82/80fcea6acf2362a4ec4ef8512fe2f791f412fed1635009293abedcad88
[DELETE] [CWD]/.xvc/b3/1bc/b82
[DELETE] [CWD]/.xvc/b3/1bc
[DELETE] [CWD]/.xvc/b3/863/86d/62e50462e37699d86e9b436526cb3fe40c66e38030e4e25ae4e168193a/0.bin
[DELETE] [CWD]/.xvc/b3/863/86d/62e50462e37699d86e9b436526cb3fe40c66e38030e4e25ae4e168193a
[DELETE] [CWD]/.xvc/b3/863/86d
[DELETE] [CWD]/.xvc/b3/863
[DELETE] [CWD]/.xvc/b3/f60/f11/901bf063f1448d095f336929929e153025a3ec238128a42ff6e5f080ef/0.bin
[DELETE] [CWD]/.xvc/b3/f60/f11/901bf063f1448d095f336929929e153025a3ec238128a42ff6e5f080ef
[DELETE] [CWD]/.xvc/b3/f60/f11
[DELETE] [CWD]/.xvc/b3/f60
[DELETE] [CWD]/.xvc/b3

$ rm -rf dir-0001/

Then get back them from the storage.

$ xvc file bring --from backup dir-0001

$ tree dir-0001
dir-0001
├── file-0001.bin
├── file-0002.bin
└── file-0003.bin

1 directory, 3 files

If you want to remove a file and all of its versions from a storage, you can use xvc file remove command.

$ xvc file remove --from-storage backup dir-0001/

Caveats

--name NAME is not verified to be unique but you should use unique storage names to refer them later. You can also use storage GUIDs listed by xvc storage list to refer to storages.

You must have a valid connection to the server.

Xvc uses Minio API port (9001, by default) to connect to the server. Ensure that it's accessible.

For reasons caused from the underlying library, Xvc tries to connect http://xvc-bucket.example.com:9001 if you give http://example.com:9001 as the endpoint, and xvc-bucket as the bucket name. You may need to consider this when you have servers running in exact URLs. If you have a http://minio.example.com:9001 as a Minio server, you may want to supply http://example.com:9001 as the endpoint, and minio as the bucket name to form the correct URL. This behavior may change in the future.

Technical Details

This command requires Xvc to be compiled with minio feature, which is on by default. It uses Rust async features via rust-s3 crate, and may add some bulk to the binary. If you want to compile Xvc without these features, please refer to How to Compile Xvc document.

The command creates .xvc-guid file in http://{{BUCKET-NAME}}.{{ENDPOINT}}/{{STORAGE-PREFIX}}/.xvc-guid. The file contains the unique identifier for this storage. The same identifier is also recorded to the project.

A file that's found in .xvc/{{HASH_PREFIX}}/{{CACHE_PATH}} is saved to http://{{BUCKET-NAME}}.{{ENDPOINT}}/{{STORAGE-PREFIX}}/{{REPO_ID}}/{{HASH_PREFIX}}/{{CACHE_PATH}}. {{REPO_ID}} is the unique identifier for the repository created during xvc init. Hence if you use a common storage for different Xvc projects, their files are kept under different directories. There is no inter-project deduplication.

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