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44 lines
2.2 KiB
Go
44 lines
2.2 KiB
Go
package docker
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// Note: "|" will be replaced by backticks
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var longHelp = `
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This command implements the Docker volume plugin API allowing docker to use
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rclone as a data storage mechanism for various cloud providers.
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rclone provides [docker volume plugin](/docker) based on it.
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To create a docker plugin, one must create a Unix or TCP socket that Docker
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will look for when you use the plugin and then it listens for commands from
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docker daemon and runs the corresponding code when necessary.
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Docker plugins can run as a managed plugin under control of the docker daemon
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or as an independent native service. For testing, you can just run it directly
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from the command line, for example:
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sudo rclone serve docker --base-dir /tmp/rclone-volumes --socket-addr localhost:8787 -vv
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Running |rclone serve docker| will create the said socket, listening for
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commands from Docker to create the necessary Volumes. Normally you need not
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give the |--socket-addr| flag. The API will listen on the unix domain socket
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at |/run/docker/plugins/rclone.sock|. In the example above rclone will create
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a TCP socket and a small file |/etc/docker/plugins/rclone.spec| containing
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the socket address. We use |sudo| because both paths are writeable only by
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the root user.
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If you later decide to change listening socket, the docker daemon must be
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restarted to reconnect to |/run/docker/plugins/rclone.sock|
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or parse new |/etc/docker/plugins/rclone.spec|. Until you restart, any
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volume related docker commands will timeout trying to access the old socket.
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Running directly is supported on **Linux only**, not on Windows or MacOS.
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This is not a problem with managed plugin mode described in details
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in the [full documentation](https://rclone.org/docker).
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The command will create volume mounts under the path given by |--base-dir|
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(by default |/var/lib/docker-volumes/rclone| available only to root)
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and maintain the JSON formatted file |docker-plugin.state| in the rclone cache
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directory with book-keeping records of created and mounted volumes.
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All mount and VFS options are submitted by the docker daemon via API, but
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you can also provide defaults on the command line as well as set path to the
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config file and cache directory or adjust logging verbosity.
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`
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