Update whereabouts binaries from v0.4 to v0.4.2 (#2666)

Also adding a script to simplify updating these binaries in the
future. The script outputs tarballs that need to be uploaded to the
downloads.antrea.io AWS S3 bucket.

Fixes #2656

Signed-off-by: Antonin Bas <abas@vmware.com>

build/images/base/Dockerfile

@@ -2,6 +2,7 @@ ARG OVS_VERSION
 FROM ubuntu:20.04 as cni-binaries
 
 ARG CNI_BINARIES_VERSION
+ARG WHEREABOUTS_VERSION=v0.4.2
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends wget ca-certificates
@@ -20,7 +21,7 @@ RUN set -eux; \
     esac; \
     mkdir -p /opt/cni/bin; \
     wget -q -O - https://github.com/containernetworking/plugins/releases/download/$CNI_BINARIES_VERSION/cni-plugins-linux-${pluginsArch}-$CNI_BINARIES_VERSION.tgz | tar xz -C /opt/cni/bin $CNI_PLUGINS; \
-    wget -q -O - https://downloads.antrea.io/whereabouts/v0.4/whereabouts-linux-${pluginsArch}.tgz | tar xz -C /opt/cni/bin/ whereabouts-linux-${pluginsArch}/whereabouts --strip-components=1 --no-same-owner
+    wget -q -O - https://downloads.antrea.io/whereabouts/$WHEREABOUTS_VERSION/whereabouts-linux-${pluginsArch}.tgz | tar xz -C /opt/cni/bin/ whereabouts-linux-${pluginsArch}/whereabouts --strip-components=1 --no-same-owner
 
 FROM antrea/openvswitch:${OVS_VERSION}
 

hack/build-whereabouts.sh

@@ -0,0 +1,117 @@
+#!/usr/bin/env bash
+
+# Copyright 2021 Antrea Authors
+#
+# 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.
+
+set -eo pipefail
+
+function echoerr {
+    >&2 echo "$@"
+}
+
+_usage="Usage: $0 --out <OUT_DIR> --ref <WHEREABOUTS_REF>
+Build the whereabouts binaries and get them ready for upload to downloads.antrea.io
+        --out <OUT_DIR>                Directory where binaries should be generated
+        --ref <WHEREABOUTS_REF>        Whereabouts ref to use (tag, sha)"
+
+function print_usage {
+    echoerr "$_usage"
+}
+
+function print_help {
+    echoerr "Try '$0 --help' for more information."
+}
+
+OUT_DIR=""
+WHEREABOUTS_REF=""
+
+while [[ $# -gt 0 ]]
+do
+key="$1"
+
+case $key in
+    --out)
+    OUT_DIR="$2"
+    shift 2
+    ;;
+    --ref)
+    WHEREABOUTS_REF="$2"
+    shift 2
+    ;;
+    -h|--help)
+    print_usage
+    exit 0
+    ;;
+    *)    # unknown option
+    echoerr "Unknown option $1"
+    exit 1
+    ;;
+esac
+done
+
+if [ "$OUT_DIR" == "" ]; then
+    echoerr "--out is required"
+    print_help
+    exit 1
+fi
+
+if [ "$WHEREABOUTS_REF" == "" ]; then
+    echoerr "--ref is required"
+    print_help
+    exit 1
+fi
+
+mkdir -p "$OUT_DIR"
+OUT_DIR=$(cd "$OUT_DIR" && pwd)
+FILES_DIR="$OUT_DIR/whereabouts/$WHEREABOUTS_REF"
+mkdir -p "$FILES_DIR"
+
+pushd $OUT_DIR > /dev/null
+
+WORKDIR=$(mktemp -d $OUT_DIR/workdir.XXXXXXXX)
+git clone --depth 1 --branch "$WHEREABOUTS_REF" https://github.com/k8snetworkplumbingwg/whereabouts.git $WORKDIR
+
+pushd $WORKDIR > /dev/null
+
+WHEREABOUTS_BUILDS=(
+    "linux amd64"
+    "linux arm64"
+    "linux arm"
+)
+
+FILES=""
+for build in "${WHEREABOUTS_BUILDS[@]}"; do
+    args=($build)
+    os="${args[0]}"
+    arch="${args[1]}"
+    name="whereabouts-${os}-${arch}"
+    echoerr "Building ${name} ..."
+
+    GOOS=$os GOARCH=$arch ./hack/build-go.sh
+    mkdir $name
+    mv bin/whereabouts $name/
+    cp LICENSE $name/
+    tar -zcvf "${FILES_DIR}/${name}.tgz" $name
+    FILES="$FILES $name.tgz"
+done
+
+
+popd > /dev/null
+
+rm -rf $WORKDIR
+
+popd > /dev/null
+
+echoerr "Files created under $FILES_DIR: $FILES"
+echoerr "You can now upload $FILES_DIR to downloads.antrea.io"