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209 lines
7.9 KiB
Markdown
209 lines
7.9 KiB
Markdown
# buildx create
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```text
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docker buildx create [OPTIONS] [CONTEXT|ENDPOINT]
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```
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<!---MARKER_GEN_START-->
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Create a new builder instance
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### Options
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| Name | Type | Default | Description |
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|:----------------------------------------|:--------------|:--------|:----------------------------------------------------------------------|
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| [`--append`](#append) | | | Append a node to builder instead of changing it |
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| `--bootstrap` | | | Boot builder after creation |
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| [`--buildkitd-flags`](#buildkitd-flags) | `string` | | Flags for buildkitd daemon |
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| [`--config`](#config) | `string` | | BuildKit config file |
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| [`--driver`](#driver) | `string` | | Driver to use (available: `docker-container`, `kubernetes`, `remote`) |
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| [`--driver-opt`](#driver-opt) | `stringArray` | | Options for the driver |
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| [`--leave`](#leave) | | | Remove a node from builder instead of changing it |
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| [`--name`](#name) | `string` | | Builder instance name |
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| [`--node`](#node) | `string` | | Create/modify node with given name |
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| [`--platform`](#platform) | `stringArray` | | Fixed platforms for current node |
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| [`--use`](#use) | | | Set the current builder instance |
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<!---MARKER_GEN_END-->
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## Description
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Create makes a new builder instance pointing to a Docker context or endpoint,
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where context is the name of a context from `docker context ls` and endpoint is
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the address for Docker socket (eg. `DOCKER_HOST` value).
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By default, the current Docker configuration is used for determining the
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context/endpoint value.
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Builder instances are isolated environments where builds can be invoked. All
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Docker contexts also get the default builder instance.
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## Examples
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### <a name="append"></a> Append a new node to an existing builder (--append)
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The `--append` flag changes the action of the command to append a new node to an
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existing builder specified by `--name`. Buildx will choose an appropriate node
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for a build based on the platforms it supports.
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```console
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$ docker buildx create mycontext1
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eager_beaver
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$ docker buildx create --name eager_beaver --append mycontext2
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eager_beaver
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```
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### <a name="buildkitd-flags"></a> Specify options for the buildkitd daemon (--buildkitd-flags)
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```text
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--buildkitd-flags FLAGS
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```
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Adds flags when starting the buildkitd daemon. They take precedence over the
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configuration file specified by [`--config`](#config). See `buildkitd --help`
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for the available flags.
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```text
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--buildkitd-flags '--debug --debugaddr 0.0.0.0:6666'
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```
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### <a name="config"></a> Specify a configuration file for the buildkitd daemon (--config)
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```text
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--config FILE
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```
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Specifies the configuration file for the buildkitd daemon to use. The configuration
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can be overridden by [`--buildkitd-flags`](#buildkitd-flags).
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See an [example buildkitd configuration file](https://github.com/moby/buildkit/blob/master/docs/buildkitd.toml.md).
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If you don't specify a configuration file, Buildx looks for one by default in:
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* `$BUILDX_CONFIG/buildkitd.default.toml`
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* `$DOCKER_CONFIG/buildx/buildkitd.default.toml`
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* `~/.docker/buildx/buildkitd.default.toml`
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Note that if you create a `docker-container` builder and have specified
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certificates for registries in the `buildkitd.toml` configuration, the files
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will be copied into the container under `/etc/buildkit/certs` and configuration
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will be updated to reflect that.
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### <a name="driver"></a> Set the builder driver to use (--driver)
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```text
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--driver DRIVER
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```
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Sets the builder driver to be used. A driver is a configuration of a BuildKit
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backend. Buildx supports the following drivers:
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* `docker` (default)
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* `docker-container`
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* `kubernetes`
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* `remote`
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For more information about build drivers, see [here](https://docs.docker.com/build/drivers/).
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#### `docker` driver
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Uses the builder that is built into the Docker daemon. With this driver,
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the [`--load`](buildx_build.md#load) flag is implied by default on
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`buildx build`. However, building multi-platform images or exporting cache is
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not currently supported.
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#### `docker-container` driver
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Uses a BuildKit container that will be spawned via Docker. With this driver,
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both building multi-platform images and exporting cache are supported.
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Unlike `docker` driver, built images will not automatically appear in
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`docker images` and [`build --load`](buildx_build.md#load) needs to be used
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to achieve that.
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#### `kubernetes` driver
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Uses Kubernetes pods. With this driver, you can spin up pods with defined
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BuildKit container image to build your images.
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Unlike `docker` driver, built images will not automatically appear in
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`docker images` and [`build --load`](buildx_build.md#load) needs to be used
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to achieve that.
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#### `remote` driver
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Uses a remote instance of buildkitd over an arbitrary connection. With this
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driver, you manually create and manage instances of buildkit yourself, and
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configure buildx to point at it.
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Unlike `docker` driver, built images will not automatically appear in
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`docker images` and [`build --load`](buildx_build.md#load) needs to be used
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to achieve that.
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### <a name="driver-opt"></a> Set additional driver-specific options (--driver-opt)
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```text
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--driver-opt OPTIONS
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```
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Passes additional driver-specific options.
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For information about available driver options, refer to the detailed
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documentation for the specific driver:
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* [`docker` driver](https://docs.docker.com/build/drivers/docker/)
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* [`docker-container` driver](https://docs.docker.com/build/drivers/docker-container/)
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* [`kubernetes` driver](https://docs.docker.com/build/drivers/kubernetes/)
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* [`remote` driver](https://docs.docker.com/build/drivers/remote/)
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### <a name="leave"></a> Remove a node from a builder (--leave)
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The `--leave` flag changes the action of the command to remove a node from a
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builder. The builder needs to be specified with `--name` and node that is removed
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is set with `--node`.
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```console
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$ docker buildx create --name mybuilder --node mybuilder0 --leave
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```
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### <a name="name"></a> Specify the name of the builder (--name)
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```text
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--name NAME
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```
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The `--name` flag specifies the name of the builder to be created or modified.
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If none is specified, one will be automatically generated.
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### <a name="node"></a> Specify the name of the node (--node)
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```text
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--node NODE
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```
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The `--node` flag specifies the name of the node to be created or modified. If
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you don't specify a name, the node name defaults to the name of the builder it
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belongs to, with an index number suffix.
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### <a name="platform"></a> Set the platforms supported by the node (--platform)
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```text
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--platform PLATFORMS
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```
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The `--platform` flag sets the platforms supported by the node. It expects a
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comma-separated list of platforms of the form OS/architecture/variant. The node
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will also automatically detect the platforms it supports, but manual values take
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priority over the detected ones and can be used when multiple nodes support
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building for the same platform.
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```console
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$ docker buildx create --platform linux/amd64
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$ docker buildx create --platform linux/arm64,linux/arm/v7
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```
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### <a name="use"></a> Automatically switch to the newly created builder (--use)
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The `--use` flag automatically switches the current builder to the newly created
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one. Equivalent to running `docker buildx use $(docker buildx create ...)`.
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