add platform flag to Dockerfiles

Signed-off-by: Jake Sanders <jsand@google.com>
sigstore · Nov 2, 2021 · 9705097 · 9705097
1 parent 8d92b37
commit 9705097
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Showing 3 changed files with 6 additions and 3 deletions.
diff --git a/Dockerfile b/Dockerfile
@@ -13,8 +13,9 @@
 # limitations under the License.
 
 ARG RUNTIME_IMAGE=gcr.io/distroless/base:debug
+ARG TARGETPLATFORM
 
-FROM $RUNTIME_IMAGE
+FROM --platform=${TARGETPLATFORM} $RUNTIME_IMAGE
 
 ARG ARCH
 COPY cosign-linux-${ARCH} /bin/cosign

diff --git a/Dockerfile.cosigned b/Dockerfile.cosigned
@@ -13,8 +13,9 @@
 # limitations under the License.
 
 ARG RUNTIME_IMAGE=gcr.io/distroless/base:debug
+ARG TARGETPLATFORM
 
-FROM $RUNTIME_IMAGE
+FROM --platform=${TARGETPLATFORM} $RUNTIME_IMAGE
 
 ARG ARCH
 COPY cosigned-linux-${ARCH} /bin/cosigned

diff --git a/Dockerfile.sget b/Dockerfile.sget
@@ -13,8 +13,9 @@
 # limitations under the License.
 
 ARG RUNTIME_IMAGE=gcr.io/distroless/base:debug
+ARG TARGETPLATFORM
 
-FROM $RUNTIME_IMAGE
+FROM --platform=${TARGETPLATFORM} $RUNTIME_IMAGE
 
 ARG ARCH
 COPY sget-linux-${ARCH} /bin/sget