Merge pull request #162 from blackpiglet/replace_busybox_v0.5

[cherry-pick][release-0.5]Replace busybox with internal copy binary.

Dockerfile

@@ -11,10 +11,8 @@
 # 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 busybox@sha256:91540637a8c1bd8374832a77bb11ec286c9599ff8b528d69794f5dea6e257fd9 AS busybox
-
 FROM scratch
+ADD cp-plugin /bin/cp-plugin
 ADD velero-plugin-for-csi /plugins/
-COPY --from=busybox /bin/cp /bin/cp
 USER 65532:65532
-ENTRYPOINT ["cp", "/plugins/velero-plugin-for-csi", "/target/."]
+ENTRYPOINT ["/bin/cp-plugin", "/plugins/velero-plugin-for-csi", "/target/velero-plugin-for-csi"]

changelogs/CHANGELOG-0.5.md

@@ -1,5 +1,6 @@
 ### All Changes
 
+* Replace busybox with internal copy binary. (#162, @blackpiglet)
 * When restorePVs is false, CSI should restore the PVC. (#154, @blackpiglet)
 * Bump the Golang version to v1.19 for the GCP plugin's main branch. (#153, @blackpiglet)
 * Update golang.org/x/net to fix CVE. (#149, @blackpiglet)

hack/build.sh

@@ -36,6 +36,7 @@ export CGO_ENABLED=0
 if [[ -z "${OUTPUT_DIR:-}" ]]; then
   OUTPUT_DIR=.
 fi
+
 OUTPUT=${OUTPUT_DIR}/${BIN}
 if [[ "${GOOS}" = "windows" ]]; then
   OUTPUT="${OUTPUT}.exe"
@@ -46,3 +47,5 @@ go build \
     -installsuffix "static" \
     -mod=readonly \
     ./
+
+CGO_ENABLED=0 go build -v -o ${OUTPUT_DIR}/cp-plugin ./hack/cp-plugin

hack/cp-plugin/main.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+)
+
+func main() {
+	if len(os.Args) != 3 {
+		fmt.Println(
+			`Error: This command requires two arguments.
+Usage: cp-plugin src dst`)
+		os.Exit(1)
+	}
+	src, dst := os.Args[1], os.Args[2]
+	fmt.Printf("Copying %s to %s ...  ", src, dst)
+	srcFile, err := os.Open(src)
+	if err != nil {
+		panic(err)
+	}
+	defer srcFile.Close()
+	if _, err := os.Stat(dst); errors.Is(err, os.ErrNotExist) {
+		_, err = os.Create(dst)
+		if err != nil {
+			panic(err)
+		}
+	}
+	dstFile, err := os.OpenFile(dst, os.O_WRONLY, 0755)
+	if err != nil {
+		panic(err)
+	}
+	defer dstFile.Close()
+	buf := make([]byte, 1024*128)
+	_, err = io.CopyBuffer(dstFile, srcFile, buf)
+	if err != nil {
+		panic(err)
+	}
+	os.Chmod(dst, 0755)
+	fmt.Println("done.")
+}