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| Original file line number | Diff line number | Diff line change |
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| # Copyright 2018 The Kubernetes Authors. | ||
| # 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 | ||
| # | ||
| # https://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. | ||
|
|
||
| # Build metadata-prefetch go binary | ||
| FROM --platform=$BUILDPLATFORM golang:1.22.7 AS metadata-prefetch-builder | ||
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| ARG STAGINGVERSION | ||
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| WORKDIR /gcs-fuse-csi-driver | ||
| ADD . . | ||
| RUN make metadata-prefetch BINDIR=/bin | ||
|
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| # go/gke-releasing-policies#base-images | ||
| FROM gke.gcr.io/debian-base:bookworm-v1.0.4-gke.2 AS debian | ||
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| # go/gke-releasing-policies#base-images | ||
| FROM gcr.io/distroless/base-debian12 AS output-image | ||
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| # Copy existing binaries. | ||
| COPY --from=debian /bin/ls /bin/ls | ||
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| # Copy dependencies. | ||
| COPY --from=debian /lib/x86_64-linux-gnu/libselinux.so.1 /lib/x86_64-linux-gnu/libselinux.so.1 | ||
| COPY --from=debian /lib/x86_64-linux-gnu/libc.so.6 /lib/x86_64-linux-gnu/libc.so.6 | ||
| COPY --from=debian /lib/x86_64-linux-gnu/libpcre2-8.so.0 /lib/x86_64-linux-gnu/libpcre2-8.so.0 | ||
| COPY --from=debian /lib64/ld-linux-x86-64.so.2 /lib64/ld-linux-x86-64.so.2 | ||
|
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| # Validate dependencies | ||
| FROM output-image AS validator-image | ||
| COPY --from=debian /bin/bash /bin/bash | ||
| COPY --from=debian /usr/bin/ldd /usr/bin/ldd | ||
| COPY --from=debian /bin/grep /bin/grep | ||
| SHELL ["/bin/bash", "-c"] | ||
| RUN if ldd /bin/ls | grep "not found"; then echo "!!! Missing deps for ls command !!!" && exit 1; fi | ||
|
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| # Final image | ||
| FROM output-image | ||
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| # Copy the built binaries | ||
| COPY --from=metadata-prefetch-builder /bin/gcs-fuse-csi-driver-metadata-prefetch /gcs-fuse-csi-driver-metadata-prefetch | ||
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| ENTRYPOINT ["/gcs-fuse-csi-driver-metadata-prefetch"] |
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| Copyright 2018 The Kubernetes Authors. | ||
| 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 | ||
| https://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. | ||
| */ | ||
|
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| package main | ||
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| import ( | ||
| "context" | ||
| "flag" | ||
| "os" | ||
| "os/exec" | ||
| "os/signal" | ||
| "strings" | ||
| "syscall" | ||
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| "k8s.io/klog/v2" | ||
| ) | ||
|
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| const ( | ||
| mountPathsLocation = "/volumes/" | ||
| ) | ||
|
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| func main() { | ||
| klog.InitFlags(nil) | ||
| flag.Parse() | ||
|
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| // Create cancellable context to pass into exec. | ||
| ctx, cancel := context.WithCancel(context.Background()) | ||
|
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| // Handle SIGTERM signal. | ||
| sigs := make(chan os.Signal, 1) | ||
| signal.Notify(sigs, syscall.SIGTERM) | ||
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| go func() { | ||
| <-sigs | ||
| klog.Info("Caught SIGTERM signal: Terminating...") | ||
| cancel() | ||
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| os.Exit(0) // Exit gracefully | ||
| }() | ||
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| // Start the "ls" command in the background. | ||
| // All our volumes are mounted under the /volumes/ directory. | ||
| cmd := exec.CommandContext(ctx, "ls", "-R", mountPathsLocation) | ||
| cmd.Stdout = nil // Connects file descriptor to the null device (os.DevNull). | ||
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| // TODO(hime): We should research stratergies to parallelize ls execution and speed up cache population. | ||
| err := cmd.Start() | ||
| if err == nil { | ||
| mountPaths, err := getDirectoryNames(mountPathsLocation) | ||
| if err == nil { | ||
| klog.Infof("Running ls on mountPath(s): %s", strings.Join(mountPaths, ", ")) | ||
| } else { | ||
| klog.Warningf("failed to get mountPaths: %v", err) | ||
| } | ||
|
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| err = cmd.Wait() | ||
| if err != nil { | ||
| klog.Errorf("Error while executing ls command: %v", err) | ||
| } else { | ||
| klog.Info("Metadata prefetch complete") | ||
| } | ||
| } else { | ||
| klog.Errorf("Error starting ls command: %v.", err) | ||
| } | ||
|
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| klog.Info("Going to sleep...") | ||
|
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| // Keep the process running. | ||
| select {} | ||
| } | ||
|
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| // getDirectoryNames returns a list of strings representing the names of | ||
| // the directories within the provided path. | ||
| func getDirectoryNames(dirPath string) ([]string, error) { | ||
| directories := []string{} | ||
| items, err := os.ReadDir(dirPath) | ||
| if err != nil { | ||
| return directories, err | ||
| } | ||
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| for _, item := range items { | ||
| if item.IsDir() { | ||
| directories = append(directories, item.Name()) | ||
| } | ||
| } | ||
|
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| return directories, nil | ||
| } |
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