26 lines
1.0 KiB
Markdown
26 lines
1.0 KiB
Markdown
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# To build a multi-architecture Docker image
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Docker's buildx tool, which is a part of Docker BuildKit. This tool allows you to create images for different platforms from a single build command. Here's a basic rundown of the steps:
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1. **Enable experimental features** by setting `"experimental": "enabled"` in your Docker configuration file (`~/.docker/config.json`).
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2. **Install QEMU** on your macOS to emulate different architectures:
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```sh
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brew install qemu
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```
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3. **Create a new builder** that enables buildx and specify the platforms you want to target:
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```sh
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docker buildx create --name mybuilder --use
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```
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4. **Inspect the builder** to ensure it's correctly configured and can build for the target platforms:
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```sh
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docker buildx inspect mybuilder --bootstrap
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```
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5. **Build and push the image** to Docker Hub (or another registry) for the desired platforms using the `--platform` flag:
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```sh
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docker buildx build --platform linux/amd64,linux/arm64,linux/arm/v7 -t <username>/myimage:latest --push .
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``` |