# 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:

  tolerate_cgroups_v2

  # enable cri for docker in docker
  echo "enable cri"
  # shellcheck disable=SC2129
  echo "DOCKER_OPTS=\"\${DOCKER_OPTS} --cri-containerd\"" >> /etc/default/docker

  # enable debug
  echo "DOCKER_OPTS=\"\${DOCKER_OPTS} --debug\"" >> /etc/default/docker

  # let's log it where we can grab it later
  echo "DOCKER_LOGFILE=${LOG_DIR}/docker.log" >> /etc/default/docker

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)

  # TODO (vteratipally)  move the registry-mirror completely to /etc/docker/daemon.json
  local docker_opts=""
  # Decide whether to enable a docker registry mirror. This is taken from
  # the "kube-env" metadata value.
  if [[ -n "${DOCKER_REGISTRY_MIRROR_URL:-}" ]]; then
      docker_opts+="--registry-mirror=${DOCKER_REGISTRY_MIRROR_URL} "
  fi

  disable_aufs
  set_docker_options_non_ubuntu

* Limit the number of names per image reported in the node status ([#32914](https://github.com/kubernetes/kubernetes/pull/32914), [@yujuhong](https://github.com/yujuhong))
* Fix the DOCKER_OPTS appending bug. ([#33163](https://github.com/kubernetes/kubernetes/pull/33163), [@DjangoPeng](https://github.com/DjangoPeng))

* Fix race condition in setting node statusUpdateNeeded flag  ([#32807](https://github.com/kubernetes/kubernetes/pull/32807), [@jingxu97](https://github.com/jingxu97))
* Fix the DOCKER_OPTS appending bug. ([#33163](https://github.com/kubernetes/kubernetes/pull/33163), [@DjangoPeng](https://github.com/DjangoPeng))