Faster K3s Binary Build Option (#7805)

* Add local build option

Signed-off-by: Derek Nola <derek.nola@suse.com>

.dockerignore

@@ -5,3 +5,4 @@
 ./.cache
 ./.dapper
 ./.trash-cache
+./.git/objects/pack

Dockerfile.local

@@ -0,0 +1,70 @@
+ARG GOLANG=golang:1.20.4-alpine3.18
+FROM ${GOLANG} as infra
+
+ARG http_proxy=$http_proxy
+ARG https_proxy=$https_proxy
+ARG no_proxy=$no_proxy
+ENV http_proxy=$http_proxy
+ENV https_proxy=$https_proxy
+ENV no_proxy=$no_proxy
+
+RUN apk -U --no-cache add bash git gcc musl-dev docker vim less file curl wget ca-certificates jq linux-headers \
+    zlib-dev tar zip squashfs-tools npm coreutils python3 py3-pip openssl-dev libffi-dev libseccomp libseccomp-dev \
+    libseccomp-static make libuv-static sqlite-dev sqlite-static libselinux libselinux-dev zlib-dev zlib-static \
+    zstd pigz alpine-sdk binutils-gold btrfs-progs-dev btrfs-progs-static gawk yq \
+    && \
+    if [ "$(go env GOARCH)" = "amd64" ]; then \
+    apk -U --no-cache add mingw-w64-gcc; \
+    fi
+
+RUN python3 -m pip install awscli
+
+# this works for both go 1.17 and 1.18
+RUN GOPROXY=direct go install golang.org/x/tools/cmd/goimports@gopls/v0.11.0
+RUN rm -rf /go/src /go/pkg
+
+RUN if [ "$(go env GOARCH)" = "amd64" ]; then \
+    curl -sL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s v1.51.2;  \
+    fi
+
+ARG SELINUX=true
+ENV SELINUX $SELINUX
+ENV STATIC_BUILD true
+ENV SRC_DIR=/go/src/github.com/k3s-io/k3s
+WORKDIR ${SRC_DIR}/
+
+
+FROM infra as build
+
+ARG SKIP_VALIDATE
+
+COPY ./scripts/ ./scripts
+COPY ./go.mod ./go.sum ./main.go ./
+COPY ./manifests ./manifests
+RUN mkdir -p bin dist
+RUN --mount=type=cache,id=gomod,target=/go/pkg/mod \
+    ./scripts/download
+
+COPY ./cmd ./cmd
+COPY ./pkg ./pkg
+COPY ./tests ./tests
+COPY ./.git ./.git
+RUN --mount=type=cache,id=gomod,target=/go/pkg/mod \
+    --mount=type=cache,id=gobuild,target=/root/.cache/go-build \
+    ./scripts/build
+
+COPY ./contrib ./contrib
+RUN --mount=type=cache,id=gomod,target=/go/pkg/mod \
+    --mount=type=cache,id=gobuild,target=/root/.cache/go-build \
+    ./scripts/package-cli
+
+RUN ./scripts/binary_size_check.sh
+
+FROM scratch as result
+ENV SRC_DIR=/go/src/github.com/k3s-io/k3s
+COPY --from=build ${SRC_DIR}/dist /dist
+COPY --from=build ${SRC_DIR}/bin /bin
+COPY --from=build ${SRC_DIR}/build/out /build/out
+COPY --from=build ${SRC_DIR}/build/static /build/static
+COPY --from=build ${SRC_DIR}/pkg/static /pkg/static
+COPY --from=build ${SRC_DIR}/pkg/deploy /pkg/deploy

Makefile

@@ -37,3 +37,9 @@ image-scan:
 format:
 	gofmt -s -l -w $(GO_FILES)
 	goimports -w $(GO_FILES)
+
+.PHONY: local
+local:
+	DOCKER_BUILDKIT=1 docker build \
+		--build-arg="REPO TAG GITHUB_TOKEN GOLANG GOCOVER DEBUG" \
+		-t k3s-local -f Dockerfile.local --output=. .

scripts/binary_size_check.sh

@@ -2,12 +2,13 @@
 
 set -e
 
+GO=${GO-go}
+ARCH=${ARCH:-$("${GO}" env GOARCH)}
+
 if [ "${DEBUG}" = 1 ]; then
     set -x
 fi
 
-. ./scripts/version.sh
-
 # Try to keep the K3s binary under 70 megabytes.
 # "64M ought to be enough for anybody"
 MAX_BINARY_MB=70

scripts/validate

@@ -1,6 +1,11 @@
 #!/bin/bash
 set -e
 
+if [ -n "$SKIP_VALIDATE" ]; then
+    echo Skipping validation
+    exit
+fi
+
 cd $(dirname $0)/..
 
 echo Running: go mod tidy
@@ -9,10 +14,6 @@ go mod tidy
 echo Running: go generate
 go generate
 
-if [ -n "$SKIP_VALIDATE" ]; then
-    echo Skipping validation
-    exit
-fi
 echo Running validation
 
 . ./scripts/version.sh