Get Envoy binary

get-envoy-binary.sh

#!/usr/bin/env bash

set -e

if [ "$#" -ne 3 ]; then
    echo "Illegal number of parameters!"
    echo "Usage:"
    echo "  ./get-envoy-binary.sh <version> <container engine: podman | docker> <out directory>"
    exit 1
fi

version="${1}"
container_engine="${2}"
out_dir="${3}"
envoy_tag=v"${version}"-latest
image_url="invalid"

case "${container_engine}" in
  podman)
    image_url="docker.io/envoyproxy/envoy:${envoy_tag}"
    ;;
  docker)
    image_url="envoyproxy/envoy:${envoy_tag}"
    ;;
  *)
    echo "Unknown container engine: ${container_engine}. Engine must be either 'docker' or 'podman'."
    exit 1
esac

if [ ! -d "${out_dir}" ];
then
    echo "'${out_dir}' is not a directory!"
    exit -1
fi

out_path="${out_dir}/envoy"
if [ -f "${out_path}" ]; then
    echo "${out_path} already exixts!"
    exit 1
fi

echo "Envoy image:                ${image_url}"
echo "Envoy will be copied to:    ${out_path}"

# Get envoy binary location within a container
envoy_location=$("${container_engine}" run --rm --entrypoint which "${image_url}" envoy)
# Create container
container_id=$("${container_engine}" create "${image_url}")
# Copy binary
"${container_engine}" cp "${container_id}":"${envoy_location}" "${out_path}"
chmod +x "${out_path}"
# Remove container
"${container_engine}" rm -v "${container_id}"

HOWTO

Get the script:

git clone git@gist.github.com:e69ea8a299f972da7638644419cba604.git get-envoy-binary
cd get-envoy-binary
chmod +c get-envoy-binary.sh

Example usage:

./get-envoy-binary.sh 1.24 podman .