docker学习1

安装docker

yum安装docker

修改docker的yum源：
删除已安装的Docker：
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-selinux \
docker-engine-selinux \
docker-engine
配置阿里云Docker Yum源
# Set up repository
yum install -y yum-utils device-mapper-persistent-data lvm2
# Use Aliyun Docker
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

查看docker可安装的版本

# yum list docker-ce  --showduplicates | sort -r

# yum -y install docker-ce-18.09.6

# systemctl start docker.service

# systemctl enable docker.service 

安装较旧版本（比如Docker 17.03.2) 时需要指定完整的rpm包的包名，并且加上--setopt=obsoletes=0 参数：

# Install docker
# on a new system with yum repo defined, forcing older version and ignoring obsoletes introduced by 17.06.0
yum install -y --setopt=obsoletes=0 \
docker-ce-17.03.2.ce-1.el7.centos.x86_64 \
docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch

或安装Docker较新版本（比如Docker 18.03.0)时加上rpm包名的版本号部分：

sudo yum install docker-ce-18.03.0.ce

或安装Docker最新版本，无需加版本号：

sudo yum install docker-ce

--------------

二进制安装docker

二进制安装docker

下载二进制包

wget https://download.docker.com/linux/static/stable/x86_64/docker-18.09.6.tgz

tar -xvf docker-18.09.6.tgz

 

Or

curl -L https://download.docker.com/linux/static/stable/x86_64/docker-18.09.6.tgz -o docker-18.09.6.tgz

 

将主程序放到/usr/bin目录下

cp ./docker/* /usr/bin/

 

创建systemd文件

cat > docker.service <<"EOF"

[[Unit]

Description=Docker Application Container Engine

Documentation=http://docs.docker.io

 

[Service]

#WorkingDirectory=/var/lib/docker

Environment="PATH=/bin:/sbin:/usr/bin:/usr/sbin"

#EnvironmentFile=-/run/flannel/docker

ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS

ExecReload=/bin/kill -s HUP $MAINPID

Restart=on-failure

RestartSec=5

LimitNOFILE=infinity

LimitNPROC=infinity

LimitCORE=infinity

Delegate=yes

KillMode=process

 

[Install]

WantedBy=multi-user.target

EOF

 

 

mv docker.service /usr/lib/systemd/system/docker.service

 

 

/sbin/iptables -P FORWARD ACCEPT

 

cat > /etc/docker/docker-daemon.json <<EOF

{

    "registry-mirrors": ["https://docker.mirrors.ustc.edu.cn","https://hub-mirror.c.163.com"],

    "insecure-registries": ["docker02:35000"],

    "max-concurrent-downloads": 20,

    "live-restore": true,

    "max-concurrent-uploads": 10,

    "debug": true,

    "data-root": "/var/lib/docker/data",

    "exec-root": "/var/lib/docker/exec",

    "log-opts": {

      "max-size": "100m",

      "max-file": "5"

    }

}

EOF 

 

启动Docker服务
# Start docker service
systemctl enable docker
systemctl start docker

测试docker
# test docker
docker run hello-world

# check docker
docker ps -a

# check docker info
docker info
docker version

create a 'nginx' Docker
docker run -it nginx # -t让docker分配一个伪终端并绑定到容器的标准输入上, -i则让容器的标准输入保持打开.

查看docker的信息：
docker inspect f942aba4eee7

查看docker的网络
docker inspect f942aba4eee7|grep IPAddress

访问docker
curl 172.17.0.2

进入docker
docker exec -it <Docker-id/Docker-name> bash # docker exec ：在运行的容器中执行命令