Maxim Shulga
eef0e453bf
The password could only be given through the PASSWORD variable, so Docker Compose and Swarm secrets were unusable and the password sat in the container environment. PASSWORD_FILE and TOKEN_FILE read a secret from a mounted file. Only trailing newlines are stripped, since secret files are usually written with one and a password that silently carries it just fails to authenticate; everything else, including surrounding spaces, belongs to the secret. Setting both a variable and a file for one secret is rejected rather than resolved by precedence, because the two are meant to be the same value and quietly picking one hides the mistake until authentication fails. The installed seaf-cli supports token authentication and ignores the password when a token is given, so sync now passes -T instead of -p. The account password no longer appears in any command line. The token does, because seaf-cli accepts credentials only as arguments, but a token can be revoked on the server. This is documented in the README. Both secrets are masked before a command is logged. Tests cover newline handling, empty and missing files, conflicting sources, and that neither secret reaches the logs. Requests are now blocked in tests: the client retries with backoff, so a test that reached the network appeared to hang instead of failing.
118 lines
4.7 KiB
Markdown
118 lines
4.7 KiB
Markdown
# docker-seafile-client
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Docker image for [Seafile CLI client](https://help.seafile.com/syncing_client/linux-cli/).
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Image on Docker Hub:
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[snegov/seafile-client](https://hub.docker.com/r/snegov/seafile-client).
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### Docker-compose example:
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Also available as a ready-to-use [`compose.example.yaml`](compose.example.yaml).
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```yaml
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services:
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seafile-client:
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restart: always
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image: snegov/seafile-client:0.0.13
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environment:
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LIBRARY_ID: "79867cbf-2944-488d-9105-852463ecdf9e:my_library"
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SERVER_HOST: seafile.example.com
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USERNAME: user
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PASSWORD: password
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SEAFILE_UID: 1000
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SEAFILE_GID: 100
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hostname: dsc
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volumes:
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- /home/johndow/seafile:/dsc/seafile
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- sync-data:/dsc/seafile-data
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container_name: seafile-client
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volumes:
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sync-data:
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```
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### Environment variables:
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- `LIBRARY_ID` - library to sync, ID or name. Multiple libraries could be
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separated by colon `:`.
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- `SERVER_HOST` - hostname of your Seafile server, eg: _seafile.example.com_.
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If you're using non-standard port, you can specify it here,
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eg: _seafile.example.com:8080_.
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- `USERNAME` / `PASSWORD` - credentials to access Seafile server.
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- `PASSWORD_FILE` - path to a file holding the password, for Docker Compose
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and Swarm secrets. Use either `PASSWORD` or `PASSWORD_FILE`, never both.
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- `TOKEN` / `TOKEN_FILE` - an API token to authenticate with instead of a
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password. A token takes precedence over a password and can be revoked on the
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server. Use either `TOKEN` or `TOKEN_FILE`, never both.
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- `SEAFILE_UID` / `SEAFILE_GID` - UID/GID of user inside container. You can
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use it to set permissions on synced files. Default values are _1000_ / _1000_.
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- `DELETE_CONFIRM_THRESHOLD` - represents the number of files that require
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confirmation before being deleted simultaneously. Default value is _500_.
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- `DISABLE_VERIFY_CERTIFICATE` - set to _true_ to disable server's certificate
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verification. Default value is _false_.
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- `UPLOAD_LIMIT` / `DOWNLOAD_LIMIT` - upload/download speed limit in B/s
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(bytes per second). Default values are _0_ (unlimited).
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### Using Docker secrets:
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Mount the secret and point `PASSWORD_FILE` at it, so the password never enters
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the environment:
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```yaml
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services:
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seafile-client:
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environment:
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PASSWORD_FILE: /run/secrets/seafile_password
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secrets:
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- seafile_password
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secrets:
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seafile_password:
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file: ./seafile_password.txt
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```
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A trailing newline in the file is ignored; everything else, including
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surrounding spaces, is part of the secret.
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The client authenticates `seaf-cli` with an API token rather than the account
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password, so the password never appears in a command line. The token does
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appear there, and command lines are visible to any process in the container.
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This is a limitation of `seaf-cli`, which accepts credentials only as
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arguments. A token can at least be revoked on the server.
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### Volumes:
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- `/dsc/seafile-data` Seafile client data directory (sync status, etc).
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- `/dsc/seafile` Seafile libraries content.
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### Some notes
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`LIBRARY_ID` could be library ID or library name. Library ID is a 36-character
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string, which is a part of URI when you open library in webUI. Library name is
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a name you gave to library when you created it.
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Libraries will be synced in subdirectories of `/dsc/seafile` directory inside
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container. You can mount it to host directory to access files.
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The subdirectory is named after the library, with whitespace replaced by
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underscores. A library is skipped with a warning when its name cannot be a
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directory of its own: an empty name, `.`, `..`, or a name containing `/`. Two
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libraries whose names would produce the same directory both get their library
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ID appended, so they never share one. Everything is created under the
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libraries directory (`/dsc/seafile`, or the deprecated `/data` when that
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exists); a library name can never place it elsewhere.
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The container stops gracefully on `docker stop`: it shuts the Seafile daemon
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down and exits with code 0. It exits with a nonzero code and an explanatory
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message when the daemon fails to start or stop within its timeout, instead of
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waiting forever.
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`hostname` parameter is optional, but it's recommended to set it to some unique
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value, it will be shown in Seafile webUI as client name (`terminal-dsc` in
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given example).
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`sync-data` volume is optional too, but it's recommended to use it. Otherwise,
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sync status will be lost when container is recreated.
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At the moment there is no suitable way to confirm deletion of large number of
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files. So, if you're going to delete a lot of files, you should set
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`DELETE_CONFIRM_THRESHOLD` to some larger value.
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### Links
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- [Official Seafile CLI client documentation](https://help.seafile.com/syncing_client/linux-cli/)
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