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1. Install Docker Engine
安装
wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17.03.3.ce-1.el7.noarch.rpm
yum install docker-ce-selinux-17.03.3.ce-1.el7.noarch.rpm
wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm
yum install docker-ce-19.03.9-3.el7.x86_64.rpm -y
wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-17.03.0.ce-1.el7.centos.x86_64.rpm
yum install docker-ce-19.03.9-3.el7.x86_64.rpm
systemctl start docker验证
docker run hello-world
docker run -i -t ubuntu /bin/bash允许其他非特权用户也使用 docker 命令
groupadd docker
usermod -aG docker $USER开机自启动
systemctl enable docker简单示例
yum install git -y
git clone https://github.com/dockersamples/node-bulletin-board
cd node-bulletin-board/bulletin-board-app
docker build --tag bulletinboard:1.0 .
docker run --publish 80:8080 --detach --name bb bulletinboard:1.0
# 删除
docker rm --force bb2. 安装 docker cli
wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-cli-19.03.9-3.el7.x86_64.rpm
yum install docker-ce-cli-19.03.9-3.el7.x86_64.rpm -y3. Install Docker Compose
sudo curl -L "https://github.com/docker/compose/releases/download/1.26.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose验证
Install Docker ComposeInstall command completion
sudo curl -L https://raw.githubusercontent.com/docker/compose/1.26.2/contrib/completion/bash/docker-compose -o /etc/bash_completion.d/docker-compose简单示例
https://docs.docker.com/compose/gettingstarted/
4. 最佳实践
DockerFile 中，将多个 RUN 命令合并为一行，可避免 docker 镜像过大。
5. 示例
Dockerfile 编写：
FROM andals/python:multi
LABEL name="Lightpower Image"
LABEL vendor="Lighthouse"
COPY pkg/ /build/pkg/
COPY script/ /build/script/
RUN /build/script/build_image.sh
CMD /build/script/init.sh其中：
- RUN 执行命令
- CMD 执行容器启动命令
运行：
docker run -d --name=lightpower \
--volumes-from=data-home -v $HOME/data/lightpower:/data/lightpower \
-p 8001:8001 -e "REGION_CONF_SUFFIX=mac" lighthouse/lightpower:${lightpowerVer}其中，
- --volumes-from 从另一个容器当中挂载容器中已经创建好的数据卷。data-home 便是预先创建好的 centos 容器。
- -v 将主机内目录映射到容器内目录
6 相关命令
以 xremote 身份进入 docker：
docker exec -it -u xremote "$XREMOTE_CONTAINER_NAME" bash不进入 docker 时，以 xremote 身份在 docker 内部执行命令：
docker exec -i -u xremote "$XREMOTE_CONTAINER_NAME" \
bash -c "source /home/xremote/.cargo/env && cd client && bash release_build.sh build_deb"
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