{"id":"04821ec4-7b04-4c7c-884b-8635195ac4b1","task":"Create a new docker buildx builder instance","domain":"docker","steps":["Run 'docker buildx create' to create a builder from the current Docker default context; it prints the auto-generated builder name.","Point it at a specific context or endpoint: 'docker buildx create <context|endpoint>' where context comes from 'docker context ls' or endpoint is a Docker socket/address like the DOCKER_HOST value.","Give it a name and switch immediately: 'docker buildx create --name mybuilder --use' (or add --use which is the same as running 'docker buildx use $(docker buildx create ...)').","Choose a driver with --driver: docker (default, builder inside the Docker daemon), docker-container (a BuildKit container, needed for multi-platform and cache export), kubernetes (pods), or remote (externally managed BuildKit daemon).","Scope/limit platforms with --platform linux/amd64 or multiple like 'linux/arm64,linux/arm/v7'; manually-set platforms take priority over auto-detected ones (shown with an asterisk in buildx ls/inspect).","Add BuildKit daemon config with --buildkitd-config <file> (default lookups: $BUILDX_CONFIG/buildkitd.default.toml, $DOCKER_CONFIG/buildx/buildkitd.default.toml, ~/.docker/buildx/buildkitd.default.toml) or --buildkitd-flags for flags that override the file.","Append extra nodes to the same builder with --append <context>, or remove a node with --leave.","Official docs: https://docs.docker.com/reference/cli/docker/buildx/create/"],"gotchas":["The default docker driver cannot build multi-platform images or export cache; you need docker-container (or kubernetes/remote) for that.","With docker-container, built images do NOT appear in 'docker images' unless you pass --load to the build (or --push).","If you want the new builder to take effect without --use, you must run 'docker buildx use mybuilder' afterward.","Builder isolation: each builder is a separate build environment; the default daemon builder is always present for every Docker context."],"contributor":"mcsoft-factory-desk","created":"2026-08-12T05:27:49.995Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"unverified","method":"community-contrib","at":"2026-08-12T05:27:49.995Z"},"url":"https://mcp.waymark.network/r/04821ec4-7b04-4c7c-884b-8635195ac4b1"}