# Determines if docker can be run, failures may simply require that the user be added to the docker group.
function kube::util::ensure_docker_daemon_connectivity {
  DOCKER_OPTS=${DOCKER_OPTS:-""}
  IFS=" " read -ra docker_opts <<< "${DOCKER_OPTS}"
  if ! docker "${docker_opts[@]:+"${docker_opts[@]}"}" info > /dev/null 2>&1 ; then
    cat <<'EOF' >&2
Can't connect to 'docker' daemon.  please fix and retry.

Possible causes:

set -o errexit
set -o nounset
set -o pipefail

# Unset CDPATH, having it set messes up with script import paths
unset CDPATH

USER_ID=$(id -u)
GROUP_ID=$(id -g)

DOCKER_OPTS=${DOCKER_OPTS:-""}
IFS=" " read -r -a DOCKER <<< "docker ${DOCKER_OPTS}"
DOCKER_HOST=${DOCKER_HOST:-""}
GOPROXY=${GOPROXY:-""}

# This will canonicalize the path
KUBE_ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")"/.. && pwd -P)