PO to GMP Migration Tool: Orchestrator & CLI Boilerplate

cmd/gmp-migrate/Dockerfile

@@ -0,0 +1,55 @@
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+FROM --platform=$BUILDPLATFORM google-go.pkg.dev/golang:1.26.4@sha256:3444149d0a7e3f7cfb9c2db65f0f75676fe6ad04de3ce72674efb120c08dd1c1 AS buildbase
+ARG TARGETOS
+ARG TARGETARCH
+ARG BUILDARCH
+WORKDIR /app
+COPY charts/values.global.yaml charts/values.global.yaml
+COPY go.mod go.mod
+COPY go.sum go.sum
+COPY tools tools
+# Copy the Go vendor directory only if it exists. Vendor folder will automatically
+# cause 'go build' to use -mod=vendor flag (otherwise -mod=mod is used).
+COPY vendor* vendor
+COPY cmd cmd
+COPY pkg pkg
+
+ENV GOEXPERIMENT=boringcrypto
+ENV CGO_ENABLED=1
+ENV GOFIPS140=off
+ENV GOTOOLCHAIN=local
+ENV GOOS=${TARGETOS}
+ENV GOARCH=${TARGETARCH}
+RUN if [ "${TARGETARCH}" = "arm64" ] && [ "${BUILDARCH}" != "arm64" ]; then \
+	apt-get update && apt-get install -y --no-install-recommends \
+	gcc-aarch64-linux-gnu libc6-dev-arm64-cross; \
+	export CC=aarch64-linux-gnu-gcc; \
+	elif [ "${TARGETARCH}" = "amd64" ] && [ "${BUILDARCH}" != "amd64" ]; then \
+	apt-get update && apt-get install -y --no-install-recommends \
+	gcc-x86-64-linux-gnu libc6-dev-amd64-cross; \
+	export CC=x86_64-linux-gnu-gcc; \
+	fi && \
+	GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
+	go build \
+	-ldflags="-X github.com/prometheus/common/version.Version=$(cat charts/values.global.yaml | go tool -modfile="tools/go.mod" yq '.version' ) \
+	-X github.com/prometheus/common/version.BuildDate=$(date --iso-8601=seconds)" \
+	-o gmp-migrate \
+	cmd/gmp-migrate/*.go
+
+
+FROM gke.gcr.io/gke-distroless/libc:gke_distroless_20260307.00_p0@sha256:d5c073079125b887158bb1dd0ee4da49b39a08203c3c96124ee310962dd5aae2
+COPY --from=buildbase /app/gmp-migrate /bin/gmp-migrate
+ENTRYPOINT ["/bin/gmp-migrate"]

cmd/gmp-migrate/main.go

@@ -0,0 +1,40 @@
+// Copyright 2026 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/GoogleCloudPlatform/prometheus-engine/pkg/migrate"
+	"github.com/alecthomas/kingpin/v2"
+)
+
+var (
+	// Flags.
+	inputFile = kingpin.Flag("file", "Input source (YAML file, directory, or '-' for stdin)").Short('f').Required().String()
+)
+
+func main() {
+	kingpin.CommandLine.Help = "Migrate Prometheus Operator configurations to Google Managed Prometheus (GMP)."
+	kingpin.Parse()
+
+	migrator := migrate.NewMigrator()
+	_, err := migrator.Run(*inputFile)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "[ERROR] Migration failed: %v\n", err)
+		os.Exit(1)
+	}
+}

go.mod

@@ -44,7 +44,10 @@ require (
 	sigs.k8s.io/controller-runtime v0.18.7
 )
 
-require github.com/efficientgo/e2e v0.14.1-0.20230710114240-c316eb95ae5b
+require (
+	github.com/efficientgo/e2e v0.14.1-0.20230710114240-c316eb95ae5b
+	sigs.k8s.io/yaml v1.6.0
+)
 
 require (
 	cloud.google.com/go/auth v0.16.5 // indirect
@@ -83,7 +86,7 @@ require (
 	github.com/edsrzf/mmap-go v1.2.0 // indirect
 	github.com/efficientgo/core v1.0.0-rc.3 // indirect
 	github.com/emicklei/go-restful/v3 v3.13.0 // indirect
-	github.com/evanphx/json-patch v5.6.0+incompatible // indirect
+	github.com/evanphx/json-patch v5.9.0+incompatible // indirect
 	github.com/evanphx/json-patch/v5 v5.9.11 // indirect
 	github.com/facette/natsort v0.0.0-20181210072756-2cd4dd1e2dcb // indirect
 	github.com/fatih/color v1.18.0 // indirect
@@ -114,7 +117,7 @@ require (
 	github.com/gorilla/websocket v1.5.4-0.20250319132907-e064f32e3674 // indirect
 	github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc // indirect
 	github.com/hashicorp/go-version v1.7.0 // indirect
-	github.com/imdario/mergo v0.3.6 // indirect
+	github.com/imdario/mergo v0.3.16 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/jpillora/backoff v1.0.0 // indirect
@@ -176,7 +179,6 @@ require (
 	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.7.0 // indirect
-	sigs.k8s.io/yaml v1.6.0 // indirect
 )
 
 replace (