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49 lines
1.6 KiB
Markdown
49 lines
1.6 KiB
Markdown
# Using a custom network
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[Create a network](https://docs.docker.com/engine/reference/commandline/network_create/)
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named `foonet`:
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```console
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$ docker network create foonet
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```
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[Create a `docker-container` builder](../reference/buildx_create.md) named
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`mybuilder` that will use this network:
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```console
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$ docker buildx create --use \
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--name mybuilder \
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--driver docker-container \
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--driver-opt "network=foonet"
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```
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Boot and [inspect `mybuilder`](../reference/buildx_inspect.md):
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```console
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$ docker buildx inspect --bootstrap
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```
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[Inspect the builder container](https://docs.docker.com/engine/reference/commandline/inspect/)
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and see what network is being used:
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```console
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$ docker inspect buildx_buildkit_mybuilder0 --format={{.NetworkSettings.Networks}}
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map[foonet:0xc00018c0c0]
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```
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## What's `buildx_buildkit_mybuilder0`?
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`buildx_buildkit_mybuilder0` is the container name. It can be broken down like this:
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* `buildx_buildkit_` is a hardcoded prefix
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* `mybuilder0` is the name of the node (defaults to builder name + position in the list of nodes)
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```console
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$ docker buildx ls
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NAME/NODE DRIVER/ENDPOINT STATUS PLATFORMS
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mybuilder * docker-container
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mybuilder0 unix:///var/run/docker.sock running linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/mips64le, linux/mips64, linux/arm/v7, linux/arm/v6
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default docker
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default default running linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
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```
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