今天在build docker 的时候突然看到网上有个Dockerfile 里写的
RUN curl -sSL https://get.daocloud.io/docker | sh
好奇的促使下打开这个连接看了一下：（把内容放到了文章末尾）
从脚本可以看出，这个脚本可以自动的判断系统属性以及CPU架构，并且会安装docker ,想想之前安装的时候首先的更新源然后在install ,真实麻烦，有了这个脚本就可以实现一键安装了，具体的安装方式是:
curl -sSL https://get.daocloud.io/docker | sh
安装的前提是系统安装有curl，这是基本的工具，应该都有，实在没有该命令的话只能装一个了
(yum | apt-get) update && (yum | apt-get) -y curl
(yum | apt-get) 是根据自己的系统进行选择yum是centos的包管理器，而apt-get则是ubunut的管理器
#!/bin/sh
set -e
# This script is meant for quick & easy install via:
# $ curl -fsSL https://get.docker.com -o get-docker.sh
# $ sh get-docker.sh
#
# For test builds (ie. release candidates):
# $ curl -fsSL https://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=cfba462
# The channel to install from:
# * nightly
# * test
# * stable
# * edge (deprecated)
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
--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"
;;
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
}
ee_promo() {
# Randomly select an advertisement
echo
echo "** DOCKER ENGINE - ENTERPRISE **"
echo
SHORT_URL=""
case $(shuf -i 0-1 -n 1) in
0)
echo "Test drive additional security features by activating Docker Engine - Enterprise."
echo
echo " * Leverage FIPS 140-2 validated encryption"
echo " * Run only trusted images with digital signature enforcement"
SHORT_URL="https://dockr.ly/engine1"
;;
1)
echo "If you芒聙聶re ready for production workloads, Docker Engine - Enterprise also includes:"
echo
echo " * SLA-backed technical support"
echo " * Extended lifecycle maintenance policy for patches and hotfixes"
echo " * Access to certified ecosystem content"
SHORT_URL="https://dockr.ly/engine2"
;;
esac
echo
echo "** Learn more at ${SHORT_URL} **"
echo
echo "ACTIVATE your own engine to Docker Engine - Enterprise using:"
echo
echo " sudo docker engine activate"
echo
sleep 10
}
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 "$dist_version" in
9)
dist_version="stretch"
;;
8)
dist_version="jessie"
;;
esac
;;
centos)
if [ -z "$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 "$VERSION_ID")"
fi
;;
esac
# Check if this is a forked Linux distro
check_forked
# Run setup for each distro accordingly
case "$lsb_dist" in
ubuntu|debian|raspbian)
pre_reqs="apt-transport-https ca-certificates curl"
if [ "$lsb_dist" = "debian" ]; then
# libseccomp2 does not exist for debian jessie main repos for aarch64
if [ "$(uname -m)" = "aarch64" ] && [ "$dist_version" = "jessie" ]; then
add_debian_backport_repo "$dist_version"
fi
fi
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"
$sh_c 'apt-get update -qq >/dev/null'
)
pkg_version=""
if [ -n "$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").*-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
ee_promo
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
pkg_manager="dnf"
config_manager="dnf config-manager"
enable_channel_flag="--set-enabled"
disable_channel_flag="--set-disabled"
pre_reqs="dnf-plugins-core"
pkg_suffix="fc$dist_version"
else
pkg_manager="yum"
config_manager="yum-config-manager"
enable_channel_flag="--enable"
disable_channel_flag="--disable"
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 $disable_channel_flag docker-ce-*"
$sh_c "$config_manager $enable_channel_flag docker-ce-$CHANNEL"
fi
$sh_c "$pkg_manager makecache"
)
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 "$VERSION" | sed "s/-ce-/\\\\.ce.*/g" | sed "s/-/.*/g").*$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
ee_promo
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