如何干净的卸载docker

先上服务器环境信息：

卸载的原因：

宿主机过段时间就磁盘100%了，导致continart异常退出，后来找了很多解决方案，才发现是安装docker的时候有个配置文件错误（正常的应该是|Storage Driver: overlay2）。

上干货：

①卸载

 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

②安装

 #!/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-
 x86_64-fedora-
 x86_64-fedora-
 x86_64-fedora-
 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-
 aarch64-fedora-
 aarch64-fedora-
 aarch64-centos-
 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  ]; do
     case "$1" in
         --mirror)
             mirror="$2"
             shift
             ;;
         --dry-run)
             DRY_RUN=
             ;;
         --*)
             echo "Illegal option $1"
             ;;
     esac
     shift $(( $# >  ?  :  ))
 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 >&
 }

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

 deprecation_notice() {
     distro=$
     date=$
     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
 }

 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 >&
         lsb_release_exit_code=$?
         set -e

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

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

         semverParse "$docker_version"

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

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

         cat >& <<-'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  ]; then
             cat >& <<-'EOF'
             again to update Docker, we urge you to migrate your image store before upgrading
             to v1.+.

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

         cat >& <<-'EOF'

             You may press Ctrl+C now to abort this script.
         EOF
         ( set -x; sleep  )
     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 >& <<-'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
         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
                 )
                     dist_version="stretch"
                 ;;
                 )
                     dist_version="jessie"
                 ;;
                 )
                     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
             ;;

         *)
             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 >& <<-'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
     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 ,  delete from here,
             if [ "$lsb_dist" =  "ubuntu" ] && [ "$dist_version" = "artful" ]; then
                 deprecation_notice "$lsb_dist $dist_version" "August 31, 2018"
             fi
             # TODO: August ,  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: '$VERSION' not found amongst apt-cache madison results"
                         echo
                         exit
                     fi
                     pkg_version="=$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
             ;;
         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 $yum_repo, is it valid?"
                 exit
             fi
             if [ "$lsb_dist" = "fedora" ]; then
                 if [ "$dist_version" -lt "" ]; then
                     echo "Error: Only Fedora >=26 are supported"
                     exit
                 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 $pkg_manager list results"
                         echo
                         exit
                     fi
                     # Cut out the epoch and prefix with a '-'
                     pkg_version="-$(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
             ;;
     esac
     exit
 }

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

getdocker

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

getdocker.sh 文件内容在上个代码区域