Mount linux utilities into distroless container during tests

RELEASE.md

@@ -32,8 +32,8 @@ The release process works like this:
   doker images
 * [Docker Buildx](https://docs.docker.com/engine/reference/commandline/buildx/) is used to build multi-architecture
   images and push them to [qaware/protocurl](https://hub.docker.com/r/qaware/protocurl)
-  * their Dockerfile is generated via [release/generate-Dockerfile.sh](release/generate-Dockerfile.sh)
-  * There is a hack, when copying the proper lib files via multi-stage builds and build args into the [distroless cc](https://github.com/GoogleContainerTools/distroless/tree/main/cc) image.
+  * their Dockerfile is generated via [release/40-generate-Dockerfile.sh](release/40-generate-Dockerfile.sh)
+  * There is a [hack](release/final.Dockerfile), when copying the proper lib files via multi-stage builds and build args into the [distroless cc](https://github.com/GoogleContainerTools/distroless/tree/main/cc) image.
 * Native tests for multiple platforms are run. If these tests fail then the release candidate needs to be fixed.
   * This should only happen for release candidates - as proper releases should only be created once a release candidate
     passes all tests.

dev/generate-local.Dockerfile.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 set -e
-cat dev/builder.local.Dockerfile release/final.Dockerfile dev/final.Dockerfile.extensions >dev/generated.local.Dockerfile
+cat dev/builder.local.Dockerfile release/final.Dockerfile >dev/generated.local.Dockerfile

release/final.Dockerfile

@@ -2,6 +2,8 @@ FROM gcr.io/distroless/cc:latest as final
 WORKDIR /protocurl
 
 COPY --from=builder /usr/bin/curl /usr/bin/curl
+# In the containerized tests, we mount /bin from host to get linux commands for testing.
+# If the base image changes, then that might need adaptation.
 
 # Ideally, we would simply copy these lib files based on their architecture. Unfortunately, we cannot use
 # a build arg such as "ARG ARCH_UNAME_M" here with format as given by "uname -m" (x86_64, etc.).

test/suite/test.sh

@@ -4,7 +4,15 @@ set -e
 
 WORKING_DIR="$1"
 
-export RUN_CLIENT="docker run --rm -v $WORKING_DIR/test/proto:/proto --network host"
+export RUN_CLIENT="docker run --rm -v $WORKING_DIR/test/proto:/proto --network host \
+  -v /bin/bash:/bin/bash:ro \
+  -v /bin/mkdir:/bin/mkdir:ro \
+  -v /bin/cp:/bin/cp:ro \
+  -v /bin/mv:/bin/mv:ro \
+  -v /bin/rm:/bin/rm:ro \
+  -v /bin/sed:/bin/sed:ro \
+  -v /bin/chmod:/bin/chmod:ro"
+# We also mount the utilities into the distroless container to make them useable in the tests
 
 export SHOW_LOGS="docker logs"