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k3s/docs/release/expanded/build_container.md

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Generate Build Container

  1. set env variable PATH_TO_KUBERNETES_REPO to the path to your local kubernetes/kubernetes copy: export PATH_TO_KUBERNETES_REPO="/Users/mtrachier/go/src/github.com/kubernetes/kubernetes"
  2. set env variable GOVERSION to the expected version of go for the kubernetes/kubernetes version checked out: export GOVERSION=$(yq -e '.dependencies[] | select(.name == "golang: upstream version").version' $PATH_TO_KUBERNETES_REPO/build/dependencies.yaml)
  3. set env variable GOIMAGE to the expected container image to base our custom build image on: export GOIMAGE="golang:${GOVERSION}-alpine3.15"
  4. set env variable BUILD_CONTAINER to the contents of a dockerfile for the build container: export BUILD_CONTAINER="FROM ${GOIMAGE}\nRUN apk add --no-cache bash git make tar gzip curl git coreutils rsync alpine-sdk"
  5. use Docker to create the build container: echo -e $BUILD_CONTAINER | docker build -t ${GOIMAGE}-dev -