详解如何干净的卸载docker的方法

yum remove docker \
         docker-client \
         docker-client-latest \
         docker-common \
         docker-latest \
         docker-latest-logrotate \
         docker-logrotate \
         docker-selinux \
         docker-engine-selinux \
         docker-engine

rm -rf /etc/systemd/system/docker.service.d

rm -rf /var/lib/docker

rm -rf /var/run/docker

#!/bin/sh
set -e

# This script is meant for quick & easy install via:
#  $ curl -fsSL get.docker.com -o get-docker.sh
#  $ sh get-docker.sh
#
# For test builds (ie. release candidates):
#  $ curl -fsSL test.docker.com -o test-docker.sh
#  $ sh test-docker.sh
#
# NOTE: Make sure to verify the contents of the script
#    you downloaded matches the contents of install.sh
#    located at https://github.com/docker/docker-install
#    before executing.
#
# Git commit from https://github.com/docker/docker-install when
# the script was uploaded (Should only be modified by upload job):
SCRIPT_COMMIT_SHA=36b78b2


# This value will automatically get changed for:
#  * edge
#  * test
#  * experimental
DEFAULT_CHANNEL_VALUE="edge"
if [ -z "$CHANNEL" ]; then
  CHANNEL=$DEFAULT_CHANNEL_VALUE
fi

DEFAULT_DOWNLOAD_URL="https://download.docker.com"
if [ -z "$DOWNLOAD_URL" ]; then
  DOWNLOAD_URL=$DEFAULT_DOWNLOAD_URL
fi

DEFAULT_REPO_FILE="docker-ce.repo"
if [ -z "$REPO_FILE" ]; then
  REPO_FILE="$DEFAULT_REPO_FILE"
fi

SUPPORT_MAP="
x86_64-centos-7
x86_64-fedora-26
x86_64-fedora-27
x86_64-fedora-28
x86_64-debian-wheezy
x86_64-debian-jessie
x86_64-debian-stretch
x86_64-debian-buster
x86_64-ubuntu-trusty
x86_64-ubuntu-xenial
x86_64-ubuntu-bionic
x86_64-ubuntu-artful
s390x-ubuntu-xenial
s390x-ubuntu-bionic
s390x-ubuntu-artful
ppc64le-ubuntu-xenial
ppc64le-ubuntu-bionic
ppc64le-ubuntu-artful
aarch64-ubuntu-xenial
aarch64-ubuntu-bionic
aarch64-debian-jessie
aarch64-debian-stretch
aarch64-debian-buster
aarch64-fedora-26
aarch64-fedora-27
aarch64-fedora-28
aarch64-centos-7
armv6l-raspbian-jessie
armv7l-raspbian-jessie
armv6l-raspbian-stretch
armv7l-raspbian-stretch
armv7l-debian-jessie
armv7l-debian-stretch
armv7l-debian-buster
armv7l-ubuntu-trusty
armv7l-ubuntu-xenial
armv7l-ubuntu-bionic
armv7l-ubuntu-artful
"

mirror=''
DRY_RUN=${DRY_RUN:-}
while [ $# -gt 0 ]; do
  case "$1" in
    --mirror)
      mirror="$2"
      shift
      ;;
    --dry-run)
      DRY_RUN=1
      ;;
    --*)
      echo "Illegal option $1"
      ;;
  esac
  shift $(( $# > 0 ? 1 : 0 ))
done

case "$mirror" in
  Aliyun)
    DOWNLOAD_URL="https://mirrors.aliyun.com/docker-ce"
    ;;
  AzureChinaCloud)
    DOWNLOAD_URL="https://mirror.azure.cn/docker-ce"
    ;;
esac

command_exists() {
  command -v "$@" > /dev/null 2>&1
}

is_dry_run() {
  if [ -z "$DRY_RUN" ]; then
    return 1
  else
    return 0
  fi
}

deprecation_notice() {
  distro=$1
  date=$2
  echo
  echo "DEPRECATION WARNING:"
  echo "  The distribution, $distro, will no longer be supported in this script as of $date."
  echo "  If you feel this is a mistake please submit an issue at https://github.com/docker/docker-install/issues/new"
  echo
  sleep 10
}

get_distribution() {
  lsb_dist=""
  # Every system that we officially support has /etc/os-release
  if [ -r /etc/os-release ]; then
    lsb_dist="$(. /etc/os-release && echo "$ID")"
  fi
  # Returning an empty string here should be alright since the
  # case statements don't act unless you provide an actual value
  echo "$lsb_dist"
}

add_debian_backport_repo() {
  debian_version="$1"
  backports="deb http://ftp.debian.org/debian $debian_version-backports main"
  if ! grep -Fxq "$backports" /etc/apt/sources.list; then
    (set -x; $sh_c "echo \"$backports\" >> /etc/apt/sources.list")
  fi
}

echo_docker_as_nonroot() {
  if is_dry_run; then
    return
  fi
  if command_exists docker && [ -e /var/run/docker.sock ]; then
    (
      set -x
      $sh_c 'docker version'
    ) || true
  fi
  your_user=your-user
  [ "$user" != 'root' ] && your_user="$user"
  # intentionally mixed spaces and tabs here -- tabs are stripped by "<<-EOF", spaces are kept in the output
  echo "If you would like to use Docker as a non-root user, you should now consider"
  echo "adding your user to the \"docker\" group with something like:"
  echo
  echo " sudo usermod -aG docker $your_user"
  echo
  echo "Remember that you will have to log out and back in for this to take effect!"
  echo
  echo "WARNING: Adding a user to the \"docker\" group will grant the ability to run"
  echo "     containers which can be used to obtain root privileges on the"
  echo "     docker host."
  echo "     Refer to https://docs.docker.com/engine/security/security/#docker-daemon-attack-surface"
  echo "     for more information."

}

# Check if this is a forked Linux distro
check_forked() {

  # Check for lsb_release command existence, it usually exists in forked distros
  if command_exists lsb_release; then
    # Check if the `-u` option is supported
    set +e
    lsb_release -a -u > /dev/null 2>&1
    lsb_release_exit_code=$?
    set -e

    # Check if the command has exited successfully, it means we're in a forked distro
    if [ "$lsb_release_exit_code" = "0" ]; then
      # Print info about current distro
      cat <<-EOF
      You're using '$lsb_dist' version '$dist_version'.
      EOF

      # Get the upstream release info
      lsb_dist=$(lsb_release -a -u 2>&1 | tr '[:upper:]' '[:lower:]' | grep -E 'id' | cut -d ':' -f 2 | tr -d '[:space:]')
      dist_version=$(lsb_release -a -u 2>&1 | tr '[:upper:]' '[:lower:]' | grep -E 'codename' | cut -d ':' -f 2 | tr -d '[:space:]')

      # Print info about upstream distro
      cat <<-EOF
      Upstream release is '$lsb_dist' version '$dist_version'.
      EOF
    else
      if [ -r /etc/debian_version ] && [ "$lsb_dist" != "ubuntu" ] && [ "$lsb_dist" != "raspbian" ]; then
        if [ "$lsb_dist" = "osmc" ]; then
          # OSMC runs Raspbian
          lsb_dist=raspbian
        else
          # We're Debian and don't even know it!
          lsb_dist=debian
        fi
        dist_version="$(sed 's/\/.*//' /etc/debian_version | sed 's/\..*//')"
        case "$dist_version" in
          9)
            dist_version="stretch"
          ;;
          8|'Kali Linux 2')
            dist_version="jessie"
          ;;
          7)
            dist_version="wheezy"
          ;;
        esac
      fi
    fi
  fi
}

semverParse() {
  major="${1%%.*}"
  minor="${1#$major.}"
  minor="${minor%%.*}"
  patch="${1#$major.$minor.}"
  patch="${patch%%[-.]*}"
}

ee_notice() {
  echo
  echo
  echo " WARNING: $1 is now only supported by Docker EE"
  echo "      Check https://store.docker.com for information on Docker EE"
  echo
  echo
}

do_install() {
  echo "# Executing docker install script, commit: $SCRIPT_COMMIT_SHA"

  if command_exists docker; then
    docker_version="$(docker -v | cut -d ' ' -f3 | cut -d ',' -f1)"
    MAJOR_W=1
    MINOR_W=10

    semverParse "$docker_version"

    shouldWarn=0
    if [ "$major" -lt "$MAJOR_W" ]; then
      shouldWarn=1
    fi

    if [ "$major" -le "$MAJOR_W" ] && [ "$minor" -lt "$MINOR_W" ]; then
      shouldWarn=1
    fi

    cat >&2 <<-'EOF'
      Warning: the "docker" command appears to already exist on this system.

      If you already have Docker installed, this script can cause trouble, which is
      why we're displaying this warning and provide the opportunity to cancel the
      installation.

      If you installed the current Docker package using this script and are using it
    EOF

    if [ $shouldWarn -eq 1 ]; then
      cat >&2 <<-'EOF'
      again to update Docker, we urge you to migrate your image store before upgrading
      to v1.10+.

      You can find instructions for this here:
      https://github.com/docker/docker/wiki/Engine-v1.10.0-content-addressability-migration
      EOF
    else
      cat >&2 <<-'EOF'
      again to update Docker, you can safely ignore this message.
      EOF
    fi

    cat >&2 <<-'EOF'

      You may press Ctrl+C now to abort this script.
    EOF
    ( set -x; sleep 20 )
  fi

  user="$(id -un 2>/dev/null || true)"

  sh_c='sh -c'
  if [ "$user" != 'root' ]; then
    if command_exists sudo; then
      sh_c='sudo -E sh -c'
    elif command_exists su; then
      sh_c='su -c'
    else
      cat >&2 <<-'EOF'
      Error: this installer needs the ability to run commands as root.
      We are unable to find either "sudo" or "su" available to make this happen.
      EOF
      exit 1
    fi
  fi

  if is_dry_run; then
    sh_c="echo"
  fi

  # perform some very rudimentary platform detection
  lsb_dist=$( get_distribution )
  lsb_dist="$(echo "$lsb_dist" | tr '[:upper:]' '[:lower:]')"

  case "$lsb_dist" in

    ubuntu)
      if command_exists lsb_release; then
        dist_version="$(lsb_release --codename | cut -f2)"
      fi
      if [ -z "$dist_version" ] && [ -r /etc/lsb-release ]; then
        dist_version="$(. /etc/lsb-release && echo "$DISTRIB_CODENAME")"
      fi
    ;;

    debian|raspbian)
      dist_version="$(sed 's/\/.*//' /etc/debian_version | sed 's/\..*//')"
      case "$dist_version" in
        9)
          dist_version="stretch"
        ;;
        8)
          dist_version="jessie"
        ;;
        7)
          dist_version="wheezy"
        ;;
      esac
    ;;

    centos)
      if [ -z "$dist_version" ] && [ -r /etc/os-release ]; then
        dist_version="$(. /etc/os-release && echo "$VERSION_ID")"
      fi
    ;;

    rhel|ol|sles)
      ee_notice "$lsb_dist"
      exit 1
      ;;

    *)
      if command_exists lsb_release; then
        dist_version="$(lsb_release --release | cut -f2)"
      fi
      if [ -z "$dist_version" ] && [ -r /etc/os-release ]; then
        dist_version="$(. /etc/os-release && echo "$VERSION_ID")"
      fi
    ;;

  esac

  # Check if this is a forked Linux distro
  check_forked

  # Check if we actually support this configuration
  if ! echo "$SUPPORT_MAP" | grep "$(uname -m)-$lsb_dist-$dist_version" >/dev/null; then
    cat >&2 <<-'EOF'

    Either your platform is not easily detectable or is not supported by this
    installer script.
    Please visit the following URL for more detailed installation instructions:

    https://docs.docker.com/engine/installation/

    EOF
    exit 1
  fi

  # Run setup for each distro accordingly
  case "$lsb_dist" in
    ubuntu|debian|raspbian)
      pre_reqs="apt-transport-https ca-certificates curl"
      if [ "$lsb_dist" = "debian" ]; then
        if [ "$dist_version" = "wheezy" ]; then
          add_debian_backport_repo "$dist_version"
        fi
        # libseccomp2 does not exist for debian jessie main repos for aarch64
        if [ "$(uname -m)" = "aarch64" ] && [ "$dist_version" = "jessie" ]; then
          add_debian_backport_repo "$dist_version"
        fi
      fi

      # TODO: August 31, 2018 delete from here,
      if [ "$lsb_dist" = "ubuntu" ] && [ "$dist_version" = "artful" ]; then
        deprecation_notice "$lsb_dist $dist_version" "August 31, 2018"
      fi
      # TODO: August 31, 2018 delete to here,

      if ! command -v gpg > /dev/null; then
        pre_reqs="$pre_reqs gnupg"
      fi
      apt_repo="deb [arch=$(dpkg --print-architecture)] $DOWNLOAD_URL/linux/$lsb_dist $dist_version $CHANNEL"
      (
        if ! is_dry_run; then
          set -x
        fi
        $sh_c 'apt-get update -qq >/dev/null'
        $sh_c "apt-get install -y -qq $pre_reqs >/dev/null"
        $sh_c "curl -fsSL \"$DOWNLOAD_URL/linux/$lsb_dist/gpg\" | apt-key add -qq - >/dev/null"
        $sh_c "echo \"$apt_repo\" > /etc/apt/sources.list.d/docker.list"
        if [ "$lsb_dist" = "debian" ] && [ "$dist_version" = "wheezy" ]; then
          $sh_c 'sed -i "/deb-src.*download\.docker/d" /etc/apt/sources.list.d/docker.list'
        fi
        $sh_c 'apt-get update -qq >/dev/null'
      )
      pkg_version=""
      if [ ! -z "$VERSION" ]; then
        if is_dry_run; then
          echo "# WARNING: VERSION pinning is not supported in DRY_RUN"
        else
          # Will work for incomplete versions IE (17.12), but may not actually grab the "latest" if in the test channel
          pkg_pattern="$(echo "$VERSION" | sed "s/-ce-/~ce~.*/g" | sed "s/-/.*/g").*-0~$lsb_dist"
          search_command="apt-cache madison 'docker-ce' | grep '$pkg_pattern' | head -1 | cut -d' ' -f 4"
          pkg_version="$($sh_c "$search_command")"
          echo "INFO: Searching repository for VERSION '$VERSION'"
          echo "INFO: $search_command"
          if [ -z "$pkg_version" ]; then
            echo
            echo "ERROR: '$VERSION' not found amongst apt-cache madison results"
            echo
            exit 1
          fi
          pkg_version="=$pkg_version"
        fi
      fi
      (
        if ! is_dry_run; then
          set -x
        fi
        $sh_c "apt-get install -y -qq --no-install-recommends docker-ce$pkg_version >/dev/null"
      )
      echo_docker_as_nonroot
      exit 0
      ;;
    centos|fedora)
      yum_repo="$DOWNLOAD_URL/linux/$lsb_dist/$REPO_FILE"
      if ! curl -Ifs "$yum_repo" > /dev/null; then
        echo "Error: Unable to curl repository file $yum_repo, is it valid?"
        exit 1
      fi
      if [ "$lsb_dist" = "fedora" ]; then
        if [ "$dist_version" -lt "26" ]; then
          echo "Error: Only Fedora >=26 are supported"
          exit 1
        fi

        pkg_manager="dnf"
        config_manager="dnf config-manager"
        enable_channel_flag="--set-enabled"
        pre_reqs="dnf-plugins-core"
        pkg_suffix="fc$dist_version"
      else
        pkg_manager="yum"
        config_manager="yum-config-manager"
        enable_channel_flag="--enable"
        pre_reqs="yum-utils"
        pkg_suffix="el"
      fi
      (
        if ! is_dry_run; then
          set -x
        fi
        $sh_c "$pkg_manager install -y -q $pre_reqs"
        $sh_c "$config_manager --add-repo $yum_repo"

        if [ "$CHANNEL" != "stable" ]; then
          $sh_c "$config_manager $enable_channel_flag docker-ce-$CHANNEL"
        fi
        $sh_c "$pkg_manager makecache"
      )
      pkg_version=""
      if [ ! -z "$VERSION" ]; then
        if is_dry_run; then
          echo "# WARNING: VERSION pinning is not supported in DRY_RUN"
        else
          pkg_pattern="$(echo "$VERSION" | sed "s/-ce-/\\\\.ce.*/g" | sed "s/-/.*/g").*$pkg_suffix"
          search_command="$pkg_manager list --showduplicates 'docker-ce' | grep '$pkg_pattern' | tail -1 | awk '{print \$2}'"
          pkg_version="$($sh_c "$search_command")"
          echo "INFO: Searching repository for VERSION '$VERSION'"
          echo "INFO: $search_command"
          if [ -z "$pkg_version" ]; then
            echo
            echo "ERROR: '$VERSION' not found amongst $pkg_manager list results"
            echo
            exit 1
          fi
          # Cut out the epoch and prefix with a '-'
          pkg_version="-$(echo "$pkg_version" | cut -d':' -f 2)"
        fi
      fi
      (
        if ! is_dry_run; then
          set -x
        fi
        $sh_c "$pkg_manager install -y -q docker-ce$pkg_version"
      )
      echo_docker_as_nonroot
      exit 0
      ;;
  esac
  exit 1
}

# wrapped up in a function so that we have some protection against only getting
# half the file during "curl | sh"
do_install

chmod +x getdocker.sh 
./getdocker.sh -s docker --mirror Aliyun