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-enginerm -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-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
