Docker手动安装步骤

Question

如下代码是docker的安装shell脚本，由于执行时该脚本隐藏了很多中间输出，导致我很不安，怕安装过程中出了问题我发现不了。所以我想要自己手动逐行输入命令安装。请帮我简化一下该脚本，方便我手动安装
#!/bin/sh
set -e

Docker Engine for Linux installation script.

This script is intended as a convenient way to configure docker's package

repositories and to install Docker Engine, This script is not recommended

for production environments. Before running this script, make yourself familiar

with potential risks and limitations, and refer to the installation manual

at https://docs.docker.com/engine/install/ for alternative installation methods.

The script:

- Requires `root` or `sudo` privileges to run.

- Attempts to detect your Linux distribution and version and configure your

package management system for you.

- Doesn't allow you to customize most installation parameters.

- Installs dependencies and recommendations without asking for confirmation.

- Installs the latest stable release (by default) of Docker CLI, Docker Engine,

Docker Buildx, Docker Compose, containerd, and runc. When using this script

to provision a machine, this may result in unexpected major version upgrades

of these packages. Always test upgrades in a test environment before

deploying to your production systems.

- Isn't designed to upgrade an existing Docker installation. When using the

script to update an existing installation, dependencies may not be updated

to the expected version, resulting in outdated versions.

Source code is available at https://github.com/docker/docker-install/

Usage

==============================================================================

To install the latest stable versions of Docker CLI, Docker Engine, and their

dependencies:

1. download the script

$ curl -fsSL https://get.docker.com -o install-docker.sh

2. verify the script's content

$ cat install-docker.sh

3. run the script with --dry-run to verify the steps it executes

$ sh install-docker.sh --dry-run

4. run the script either as root, or using sudo to perform the installation.

$ sudo sh install-docker.sh

Command-line options

==============================================================================

--version <VERSION>

Use the --version option to install a specific version, for example:

$ sudo sh install-docker.sh --version 23.0

--channel <stable|test>

Use the --channel option to install from an alternative installation channel.

The following example installs the latest versions from the "test" channel,

which includes pre-releases (alpha, beta, rc):

$ sudo sh install-docker.sh --channel test

Alternatively, use the script at https://test.docker.com, which uses the test

channel as default.

--mirror <Aliyun|AzureChinaCloud>

Use the --mirror option to install from a mirror supported by this script.

Available mirrors are "Aliyun" (https://mirrors.aliyun.com/docker-ce), and

"AzureChinaCloud" (https://mirror.azure.cn/docker-ce), for example:

$ sudo sh install-docker.sh --mirror AzureChinaCloud

==============================================================================

Git commit from https://github.com/docker/docker-install when

the script was uploaded (Should only be modified by upload job):

SCRIPT_COMMIT_SHA="4c94a56999e10efcf48c5b8e3f6afea464f9108e"

strip "v" prefix if present

VERSION="${VERSION#v}"

The channel to install from:

* stable

* test

DEFAULT_CHANNEL_VALUE="stable"
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

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

case " $mirror" in Aliyun) DOWNLOAD_URL="https://mirrors.aliyun.com/docker-ce" ;; AzureChinaCloud) DOWNLOAD_URL="https://mirror.azure.cn/docker-ce" ;; "") ;; *) >&2 echo "unknown mirror '$ mirror': use either 'Aliyun', or 'AzureChinaCloud'."
exit 1
;;
esac

case " $CHANNEL" in stable|test) ;; *) >&2 echo "unknown CHANNEL '$ CHANNEL': use either stable or test."
exit 1
;;
esac

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

version_gte checks if the version specified in $VERSION is at least the given

SemVer (Maj.Minor[.Patch]), or CalVer (YY.MM) version.It returns 0 (success)

if $VERSION is either unset (=latest) or newer or equal than the specified

version, or returns 1 (fail) otherwise.

examples:

VERSION=23.0

version_gte 23.0 // 0 (success)

version_gte 20.10 // 0 (success)

version_gte 19.03 // 0 (success)

version_gte 26.1 // 1 (fail)

version_gte() {
if [ -z " $VERSION" ]; then return 0 fi version_compare "$ VERSION" "$1"
}

version_compare compares two version strings (either SemVer (Major.Minor.Path),

or CalVer (YY.MM) version strings. It returns 0 (success) if version A is newer

or equal than version B, or 1 (fail) otherwise. Patch releases and pre-release

(-alpha/-beta) are not taken into account

examples:

version_compare 23.0.0 20.10 // 0 (success)

version_compare 23.0 20.10 // 0 (success)

version_compare 20.10 19.03 // 0 (success)

version_compare 20.10 20.10 // 0 (success)

version_compare 19.03 20.10 // 1 (fail)

version_compare() (
set +x

text
yy_a="$(echo "$1" | cut -d'.' -f1)"
yy_b="$(echo "$2" | cut -d'.' -f1)"
if [ "$yy_a" -lt "$yy_b" ]; then
	return 1
fi
if [ "$yy_a" -gt "$yy_b" ]; then
	return 0
fi
mm_a="$(echo "$1" | cut -d'.' -f2)"
mm_b="$(echo "$2" | cut -d'.' -f2)"

# trim leading zeros to accommodate CalVer
mm_a="${mm_a#0}"
mm_b="${mm_b#0}"

if [ "${mm_a:-0}" -lt "${mm_b:-0}" ]; then
	return 1
fi

return 0

)

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

is_wsl() {
case "$(uname -r)" in
microsoft ) true ;; # WSL 2
Microsoft ) true ;; # WSL 1
* ) false;;
esac
}

is_darwin() {
case "$(uname -s)" in
darwin ) true ;;
Darwin ) true ;;
* ) false;;
esac
}

deprecation_notice() {
distro= $1 distro_version=$ 2
echo
printf "\033[91;1mDEPRECATION WARNING\033[0m\n"
printf " This Linux distribution (\033[1m%s %s\033[0m) reached end-of-life and is no longer supported by this script.\n" " $distro" "$ distro_version"
echo " No updates or security fixes will be released for this distribution, and users are recommended"
echo " to upgrade to a currently maintained version of $distro."
echo
printf "Press \033[1mCtrl+C\033[0m now to abort this script, or wait for the installation to continue."
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"
}

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

text
# intentionally mixed spaces and tabs here -- tabs are stripped by "<<-EOF", spaces are kept in the output
echo
echo "================================================================================"
echo
if version_gte "20.10"; then
	echo "To run Docker as a non-privileged user, consider setting up the"
	echo "Docker daemon in rootless mode for your user:"
	echo
	echo "    dockerd-rootless-setuptool.sh install"
	echo
	echo "Visit https://docs.docker.com/go/rootless/ to learn about rootless mode."
	echo
fi
echo
echo "To run the Docker daemon as a fully privileged service, but granting non-root"
echo "users access, refer to https://docs.docker.com/go/daemon-access/"
echo
echo "WARNING: Access to the remote API on a privileged Docker daemon is equivalent"
echo "         to root access on the host. Refer to the 'Docker daemon attack surface'"
echo "         documentation for details: https://docs.docker.com/go/attack-surface/"
echo
echo "================================================================================"
echo

}

Check if this is a forked Linux distro

check_forked() {

text
# 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
				12)
					dist_version="bookworm"
				;;
				11)
					dist_version="bullseye"
				;;
				10)
					dist_version="buster"
				;;
				9)
					dist_version="stretch"
				;;
				8)
					dist_version="jessie"
				;;
			esac
		fi
	fi
fi

}

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

text
if command_exists docker; then
	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
		again to update Docker, you can ignore this message, but be aware that the
		script resets any custom changes in the deb and rpm repo configuration
		files to match the parameters passed to the script.

		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:]')"

if is_wsl; then
	echo
	echo "WSL DETECTED: We recommend using Docker Desktop for Windows."
	echo "Please get Docker Desktop from https://www.docker.com/products/docker-desktop/"
	echo
	cat >&2 <<-'EOF'

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

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
			12)
				dist_version="bookworm"
			;;
			11)
				dist_version="bullseye"
			;;
			10)
				dist_version="buster"
			;;
			9)
				dist_version="stretch"
			;;
			8)
				dist_version="jessie"
			;;
		esac
	;;

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

	*)
		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

# Print deprecation warnings for distro versions that recently reached EOL,
# but may still be commonly used (especially LTS versions).
case "$lsb_dist.$dist_version" in
	centos.8|centos.7|rhel.7)
		deprecation_notice "$lsb_dist" "$dist_version"
		;;
	debian.buster|debian.stretch|debian.jessie)
		deprecation_notice "$lsb_dist" "$dist_version"
		;;
	raspbian.buster|raspbian.stretch|raspbian.jessie)
		deprecation_notice "$lsb_dist" "$dist_version"
		;;
	ubuntu.bionic|ubuntu.xenial|ubuntu.trusty)
		deprecation_notice "$lsb_dist" "$dist_version"
		;;
	ubuntu.mantic|ubuntu.lunar|ubuntu.kinetic|ubuntu.impish|ubuntu.hirsute|ubuntu.groovy|ubuntu.eoan|ubuntu.disco|ubuntu.cosmic)
		deprecation_notice "$lsb_dist" "$dist_version"
		;;
	fedora.*)
		if [ "$dist_version" -lt 40 ]; then
			deprecation_notice "$lsb_dist" "$dist_version"
		fi
		;;
esac

# Run setup for each distro accordingly
case "$lsb_dist" in
	ubuntu|debian|raspbian)
		pre_reqs="ca-certificates curl"
		apt_repo="deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] $DOWNLOAD_URL/linux/$lsb_dist $dist_version $CHANNEL"
		(
			if ! is_dry_run; then
				set -x
			fi
			$sh_c 'apt-get -qq update >/dev/null'
			$sh_c "DEBIAN_FRONTEND=noninteractive apt-get -y -qq install $pre_reqs >/dev/null"
			$sh_c 'install -m 0755 -d /etc/apt/keyrings'
			$sh_c "curl -fsSL \"$DOWNLOAD_URL/linux/$lsb_dist/gpg\" -o /etc/apt/keyrings/docker.asc"
			$sh_c "chmod a+r /etc/apt/keyrings/docker.asc"
			$sh_c "echo \"$apt_repo\" > /etc/apt/sources.list.d/docker.list"
			$sh_c 'apt-get -qq update >/dev/null'
		)
		pkg_version=""
		if [ -n "$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')"
				search_command="apt-cache madison docker-ce | grep '$pkg_pattern' | head -1 | awk '{\$1=\$1};1' | cut -d' ' -f 3"
				pkg_version="$($sh_c "$search_command")"
				echo "INFO: Searching repository for VERSION '$VERSION'"
				echo "INFO: $search_command"
				if [ -z "$pkg_version" ]; then
					echo
					echo "ERROR: '$VERSION' not found amongst apt-cache madison results"
					echo
					exit 1
				fi
				if version_gte "18.09"; then
						search_command="apt-cache madison docker-ce-cli | grep '$pkg_pattern' | head -1 | awk '{\$1=\$1};1' | cut -d' ' -f 3"
						echo "INFO: $search_command"
						cli_pkg_version="=$($sh_c "$search_command")"
				fi
				pkg_version="=$pkg_version"
			fi
		fi
		(
			pkgs="docker-ce${pkg_version%=}"
			if version_gte "18.09"; then
					# older versions didn't ship the cli and containerd as separate packages
					pkgs="$pkgs docker-ce-cli${cli_pkg_version%=} containerd.io"
			fi
			if version_gte "20.10"; then
					pkgs="$pkgs docker-compose-plugin docker-ce-rootless-extras$pkg_version"
			fi
			if version_gte "23.0"; then
					pkgs="$pkgs docker-buildx-plugin"
			fi
			if ! is_dry_run; then
				set -x
			fi
			$sh_c "DEBIAN_FRONTEND=noninteractive apt-get -y -qq install $pkgs >/dev/null"
		)
		echo_docker_as_nonroot
		exit 0
		;;
	centos|fedora|rhel)
		repo_file_url="$DOWNLOAD_URL/linux/$lsb_dist/$REPO_FILE"
		(
			if ! is_dry_run; then
				set -x
			fi
			if command_exists dnf5; then
				$sh_c "dnf -y -q --setopt=install_weak_deps=False install dnf-plugins-core"
				$sh_c "dnf5 config-manager addrepo --overwrite --save-filename=docker-ce.repo --from-repofile='$repo_file_url'"

				if [ "$CHANNEL" != "stable" ]; then
					$sh_c "dnf5 config-manager setopt \"docker-ce-*.enabled=0\""
					$sh_c "dnf5 config-manager setopt \"docker-ce-$CHANNEL.enabled=1\""
				fi
				$sh_c "dnf makecache"
			elif command_exists dnf; then
				$sh_c "dnf -y -q --setopt=install_weak_deps=False install dnf-plugins-core"
				$sh_c "rm -f /etc/yum.repos.d/docker-ce.repo  /etc/yum.repos.d/docker-ce-staging.repo"
				$sh_c "dnf config-manager --add-repo $repo_file_url"

				if [ "$CHANNEL" != "stable" ]; then
					$sh_c "dnf config-manager --set-disabled \"docker-ce-*\""
					$sh_c "dnf config-manager --set-enabled \"docker-ce-$CHANNEL\""
				fi
				$sh_c "dnf makecache"
			else
				$sh_c "yum -y -q install yum-utils"
				$sh_c "rm -f /etc/yum.repos.d/docker-ce.repo  /etc/yum.repos.d/docker-ce-staging.repo"
				$sh_c "yum-config-manager --add-repo $repo_file_url"

				if [ "$CHANNEL" != "stable" ]; then
					$sh_c "yum-config-manager --disable \"docker-ce-*\""
					$sh_c "yum-config-manager --enable \"docker-ce-$CHANNEL\""
				fi
				$sh_c "yum makecache"
			fi
		)
		pkg_version=""
		if command_exists dnf; then
			pkg_manager="dnf"
			pkg_manager_flags="-y -q --best"
		else
			pkg_manager="yum"
			pkg_manager_flags="-y -q"
		fi
		if [ -n "$VERSION" ]; then
			if is_dry_run; then
				echo "# WARNING: VERSION pinning is not supported in DRY_RUN"
			else
				if [ "$lsb_dist" = "fedora" ]; then
					pkg_suffix="fc$dist_version"
				else
					pkg_suffix="el"
				fi
				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 $pkg_manager list results"
					echo
					exit 1
				fi
				if version_gte "18.09"; then
					# older versions don't support a cli package
					search_command="$pkg_manager list --showduplicates docker-ce-cli | grep '$pkg_pattern' | tail -1 | awk '{print \$2}'"
					cli_pkg_version="$($sh_c "$search_command" | cut -d':' -f 2)"
				fi
				# Cut out the epoch and prefix with a '-'
				pkg_version="-$(echo "$pkg_version" | cut -d':' -f 2)"
			fi
		fi
		(
			pkgs="docker-ce$pkg_version"
			if version_gte "18.09"; then
				# older versions didn't ship the cli and containerd as separate packages
				if [ -n "$cli_pkg_version" ]; then
					pkgs="$pkgs docker-ce-cli-$cli_pkg_version containerd.io"
				else
					pkgs="$pkgs docker-ce-cli containerd.io"
				fi
			fi
			if version_gte "20.10"; then
				pkgs="$pkgs docker-compose-plugin docker-ce-rootless-extras$pkg_version"
			fi
			if version_gte "23.0"; then
					pkgs="$pkgs docker-buildx-plugin"
			fi
			if ! is_dry_run; then
				set -x
			fi
			$sh_c "$pkg_manager $pkg_manager_flags install $pkgs"
		)
		echo_docker_as_nonroot
		exit 0
		;;
	sles)
		if [ "$(uname -m)" != "s390x" ]; then
			echo "Packages for SLES are currently only available for s390x"
			exit 1
		fi
		repo_file_url="$DOWNLOAD_URL/linux/$lsb_dist/$REPO_FILE"
		pre_reqs="ca-certificates curl libseccomp2 awk"
		(
			if ! is_dry_run; then
				set -x
			fi
			$sh_c "zypper install -y $pre_reqs"
			$sh_c "rm -f /etc/zypp/repos.d/docker-ce-*.repo"
			$sh_c "zypper addrepo $repo_file_url"

			opensuse_factory_url="https://download.opensuse.org/repositories/security:/SELinux/openSUSE_Factory/"
			if ! zypper lr -d | grep -q "${opensuse_factory_url}"; then
				opensuse_repo="${opensuse_factory_url}security:SELinux.repo"
				if ! is_dry_run; then
					cat >&2 <<- EOF
						WARNING!!
						openSUSE repository ($opensuse_repo) will be enabled now.
						Do you wish to continue?
						You may press Ctrl+C now to abort this script.
					EOF
					( set -x; sleep 20 )
				fi
				$sh_c "zypper addrepo $opensuse_repo"
			fi
			$sh_c "zypper --gpg-auto-import-keys refresh"
			$sh_c "zypper lr -d"
		)
		pkg_version=""
		if [ -n "$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')"
				search_command="zypper search -s --match-exact 'docker-ce' | grep '$pkg_pattern' | tail -1 | awk '{print \$6}'"
				pkg_version="$($sh_c "$search_command")"
				echo "INFO: Searching repository for VERSION '$VERSION'"
				echo "INFO: $search_command"
				if [ -z "$pkg_version" ]; then
					echo
					echo "ERROR: '$VERSION' not found amongst zypper list results"
					echo
					exit 1
				fi
				search_command="zypper search -s --match-exact 'docker-ce-cli' | grep '$pkg_pattern' | tail -1 | awk '{print \$6}'"
				# It's okay for cli_pkg_version to be blank, since older versions don't support a cli package
				cli_pkg_version="$($sh_c "$search_command")"
				pkg_version="-$pkg_version"
			fi
		fi
		(
			pkgs="docker-ce$pkg_version"
			if version_gte "18.09"; then
				if [ -n "$cli_pkg_version" ]; then
					# older versions didn't ship the cli and containerd as separate packages
					pkgs="$pkgs docker-ce-cli-$cli_pkg_version containerd.io"
				else
					pkgs="$pkgs docker-ce-cli containerd.io"
				fi
			fi
			if version_gte "20.10"; then
				pkgs="$pkgs docker-compose-plugin docker-ce-rootless-extras$pkg_version"
			fi
			if version_gte "23.0"; then
					pkgs="$pkgs docker-buildx-plugin"
			fi
			if ! is_dry_run; then
				set -x
			fi
			$sh_c "zypper -q install -y $pkgs"
		)
		echo_docker_as_nonroot
		exit 0
		;;
	*)
		if [ -z "$lsb_dist" ]; then
			if is_darwin; then
				echo
				echo "ERROR: Unsupported operating system 'macOS'"
				echo "Please get Docker Desktop from https://www.docker.com/products/docker-desktop"
				echo
				exit 1
			fi
		fi
		echo
		echo "ERROR: Unsupported distribution '$lsb_dist'"
		echo
		exit 1
		;;
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

Answer 1

下面给出一个相对简洁、可供「手动逐行执行」的安装 Docker 参考步骤。它基于官方安装流程，去掉了脚本里大量的自动判断和处理逻辑，只保留常见主流发行版（Debian/Ubuntu、CentOS/Fedora/RHEL）最核心的命令示例。请根据自己的 Linux 发行版与版本进行选择和调整执行。

一、Debian 或 Ubuntu

1. 卸载历史遗留版本（如有）

bash
sudo apt-get remove -y docker docker-engine docker.io containerd runc

2. 安装依赖

bash
sudo apt-get update
sudo apt-get install -y ca-certificates curl gnupg

3. 添加 Docker 官方 GPG 密钥

注意：以下命令以 Debian 为例，若你是 Ubuntu，请把下面下载地址中的 “debian” 替换为 “ubuntu”。

bash
# 创建存放密钥的目录
sudo install -m 0755 -d /etc/apt/keyrings

# 下载 Docker GPG 密钥并存放到 /etc/apt/keyrings/docker.gpg
curl -fsSL https://download.docker.com/linux/debian/gpg \
  | sudo tee /etc/apt/keyrings/docker.gpg > /dev/null

# 设置文件权限
sudo chmod a+r /etc/apt/keyrings/docker.gpg

4. 添加 Docker 软件源

bash
# 如果是 Ubuntu，将下面的 debian 改为 ubuntu
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
  https://download.docker.com/linux/debian \
  $(lsb_release -cs) stable" \
  | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

5. 安装 Docker Engine

bash
# 更新源
sudo apt-get update

# 安装 Docker CE、Docker CLI、containerd 等
sudo apt-get install -y docker-ce docker-ce-cli containerd.io \
  docker-buildx-plugin docker-compose-plugin

6. 验证与后续可选操作

bash
# 验证 docker 是否安装成功
docker --version

# 启动 docker
sudo systemctl start docker
sudo systemctl enable docker  # 开机自启

# 如果想让当前用户免 sudo 执行 docker，加入 docker 用户组
sudo usermod -aG docker $USER
# 重新登录或新开一个终端后即可直接执行 docker 命令

二、CentOS / Fedora / RHEL

以下步骤适用于 RedHat 系的发行版，略去各种自动判断的逻辑，只保留核心命令。

1. 卸载历史遗留版本（如有）

bash
sudo yum remove -y docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine

（Fedora 或 dnf 系列可自行替换为 sudo dnf remove -y ...）

2. 安装必需工具

bash
# CentOS / RHEL:
sudo yum install -y yum-utils

# Fedora:
# sudo dnf -y install dnf-plugins-core

3. 添加 Docker 仓库

bash
# CentOS / RHEL 以及 Fedora 通用添加仓库方式：
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

# Fedora 若使用 dnf:
# sudo dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo

4. 安装 Docker

bash
# 更新源
sudo yum makecache
# 如果是 dnf 系列可以用 sudo dnf makecache

# 安装 Docker CE
sudo yum install -y docker-ce docker-ce-cli containerd.io \
  docker-buildx-plugin docker-compose-plugin

# Fedora 则是:
# sudo dnf install -y docker-ce docker-ce-cli containerd.io ...

5. 验证与后续可选操作

bash
# 启动 docker
sudo systemctl start docker
sudo systemctl enable docker  # 开机自启

# 验证安装
docker --version

# 若需让普通用户执行 docker 命令，请加入 docker 组
sudo usermod -aG docker $USER

三、其他发行版 / 备注

openSUSE / SLES / Arch 等其他发行版的安装方式和上述类似，重点是：
1. 安装好依赖（ca-certificates、curl 等）。
2. 添加 Docker 的官方软件源或可信的第三方源。
3. 使用发行版自带的包管理器安装 docker-ce、docker-ce-cli、containerd.io 及插件包。
如需指定特定版本，可在包管理器命令中使用相应的版本号，如 sudo apt-get install docker-ce=5:20.10.24~3-0~ubuntu-focal，具体版本号以实际仓库中的为准。
安装完成后可使用 docker run hello-world 来验证 Docker 是否能够正常拉取和运行容器。

以上就是一个“去脚本化”的 Docker 安装步骤示例，你可以按照自己系统的发行版和版本，逐行执行这些命令来安装 Docker，而无需再依赖官方那个较长的自动化脚本。这样每一步都能看到执行结果，也能及时发现并解决潜在问题。祝安装顺利!

問題

Docker Engine for Linux installation script.

This script is intended as a convenient way to configure docker's package

repositories and to install Docker Engine, This script is not recommended

for production environments. Before running this script, make yourself familiar

with potential risks and limitations, and refer to the installation manual

at https://docs.docker.com/engine/install/ for alternative installation methods.

The script:

- Requires root or sudo privileges to run.

- Attempts to detect your Linux distribution and version and configure your

package management system for you.

- Doesn't allow you to customize most installation parameters.

- Installs dependencies and recommendations without asking for confirmation.

- Installs the latest stable release (by default) of Docker CLI, Docker Engine,

Docker Buildx, Docker Compose, containerd, and runc. When using this script

to provision a machine, this may result in unexpected major version upgrades

of these packages. Always test upgrades in a test environment before

deploying to your production systems.

- Isn't designed to upgrade an existing Docker installation. When using the

script to update an existing installation, dependencies may not be updated

to the expected version, resulting in outdated versions.

Source code is available at https://github.com/docker/docker-install/

Usage

==============================================================================

To install the latest stable versions of Docker CLI, Docker Engine, and their

dependencies:

1. download the script

$ curl -fsSL https://get.docker.com -o install-docker.sh

2. verify the script's content

$ cat install-docker.sh

3. run the script with --dry-run to verify the steps it executes

$ sh install-docker.sh --dry-run

4. run the script either as root, or using sudo to perform the installation.

$ sudo sh install-docker.sh

Command-line options

==============================================================================

--version <VERSION>

Use the --version option to install a specific version, for example:

$ sudo sh install-docker.sh --version 23.0

--channel <stable|test>

Use the --channel option to install from an alternative installation channel.

The following example installs the latest versions from the "test" channel,

which includes pre-releases (alpha, beta, rc):

$ sudo sh install-docker.sh --channel test

Alternatively, use the script at https://test.docker.com, which uses the test

channel as default.

--mirror <Aliyun|AzureChinaCloud>

Use the --mirror option to install from a mirror supported by this script.

Available mirrors are "Aliyun" (https://mirrors.aliyun.com/docker-ce), and

"AzureChinaCloud" (https://mirror.azure.cn/docker-ce), for example:

$ sudo sh install-docker.sh --mirror AzureChinaCloud

==============================================================================

Git commit from https://github.com/docker/docker-install when

the script was uploaded (Should only be modified by upload job):

strip "v" prefix if present

The channel to install from:

* stable

* test

version_gte checks if the version specified in $VERSION is at least the given

SemVer (Maj.Minor[.Patch]), or CalVer (YY.MM) version.It returns 0 (success)

if $VERSION is either unset (=latest) or newer or equal than the specified

version, or returns 1 (fail) otherwise.

examples:

VERSION=23.0

version_gte 23.0 // 0 (success)

version_gte 20.10 // 0 (success)

version_gte 19.03 // 0 (success)

version_gte 26.1 // 1 (fail)

version_compare compares two version strings (either SemVer (Major.Minor.Path),

or CalVer (YY.MM) version strings. It returns 0 (success) if version A is newer

or equal than version B, or 1 (fail) otherwise. Patch releases and pre-release

(-alpha/-beta) are not taken into account

examples:

version_compare 23.0.0 20.10 // 0 (success)

version_compare 23.0 20.10 // 0 (success)

version_compare 20.10 19.03 // 0 (success)

version_compare 20.10 20.10 // 0 (success)

version_compare 19.03 20.10 // 1 (fail)

Check if this is a forked Linux distro

wrapped up in a function so that we have some protection against only getting

- Requires `root` or `sudo` privileges to run.