In order to let users quickly understand Docker, Docker official provides an interactive tutorial to help users master the use of Docker command line.
Docker command line
The following is a brief introduction to the Docker command list, and the details are introduced in the subsequent chapters. You can get help information on the command line by running docker or docker help command (we still use coreos on vmware as the operating environment, and this environment will be used in the following text unless otherwise specified):
core@localhost ~ $ docker
Usage: docker [OPTIONS] COMMAND [arg...]
-H=[unix:///var/run/docker.sock]: tcp://host:port to bind/connect to or unix://path/to/socket to use
A self-sufficient runtime for linux containers.
Commands:
attach Attach to a running container
build Build an image from a Dockerfile
commit Create a new image from a container's changes
cp Copy files/folders from a container's filesystem to the host path
diff Inspect changes on a container's filesystem
events Get real time events from the server
export Stream the contents of a container as a tar archive
history Show the history of an image
images List images
import Create a new filesystem image from the contents of a tarball
info Display system-wide information
inspect Return low-level information on a container
kill Kill a running container
load Load an image from a tar archive
login Register or log in to a Docker registry server
logout Log out from a Docker registry server
logs Fetch the logs of a container
port Lookup the public-facing port that is NAT-ed to PRIVATE_PORT
pause Pause all processes within a container
ps List containers
pull Pull an image or a repository from a Docker registry server
push Push an image or a repository to a Docker registry server
restart Restart a running container
rm Remove one or more containers
rmi Remove one or more images
run Run a command in a new container
save Save an image to a tar archive
search Search for an image on the Docker Hub
start Start a stopped container
stop Stop a running container
tag Tag an image into a repository
top Lookup the running processes of a container
unpause Unpause a paused container
version Show the Docker version information
wait Block until a container stops, then print its exit code
- Where info and version are commands related to system environment information
- events, history, logs are commands related to log information
- login\pull\push\search is a command related to the DockerHub service
- The rest are commands related to daily maintenance
command syntax
Basic usage: command + parameter
core@localhost ~ $ docker info
Containers: 7
Images: 123
Storage Driver: btrfs
Execution Driver: native-0.2
Kernel Version: 3.16.2+
Operating System: CoreOS 444.0.0
core@localhost ~ $ docker version
Client version: 1.2.0
Client API version: 1.14
Go version (client): go1.3.1
Git commit (client): fa7b24f
OS/Arch (client): linux/amd64
Server version: 1.2.0
Server API version: 1.14
Go version (server): go1.3.1
Git commit (server): fa7b24f
Single character arguments can be put together:
core@localhost ~ $ docker run -t -i ubuntu:14.04 /bin/bash
#使用分开的参数
root@d512e393fc74:/# exit
exit
core@localhost ~ $ docker run -ti ubuntu:14.04 /bin/bash
#将当个支付的参数放在一起
root@d170dacef325:/# exit
exit
core@localhost ~ $ docker rm d51 d17
#多个参数放在一行
d51
d17
core@localhost ~ $
Docker background process parameters
Parameter introduction| --api-enable-cors = false | Remote API calls. |
| -b, --bridge="" | Bridge a bridge device on a system to a Docker container, use none to disable networking in the container |
| --bip="" | Use the CIDR address to set the IP of the bridge. This parameter and -b cannot be used together. |
| -D, --debug=false | Enable Debug mode. For example: docker -d -D |
| -d, --daemon=false | Enable Daemon mode. |
| --dns=[] | Set the container to use the DNS server. For example: docker -d --dns 8.8.8.8 |
| -dns-search=[] | Sets the container to use the specified DNS to search for domain names. For example: docker -d --dns-search example.com |
| --exec-driver="native" | Sets the container to use the specified runtime driver. Such as: docker -d -e lxc |
| -G, --group="docker" | In background mode, assign the specified Group to the corresponding unix socket. Note that when this parameter --group is given an empty string, the group information will be removed |
| -g, --graph="/var/lib/docker" | Set the Docker runtime root directory |
| -H, --host=[] | Set the specified socket binding in background mode, you can bind one or more tcp://host:port, unix:///path/to/socket, fd://* or fd://socketfd. For example: $ docker -H tcp://0.0.0.0:2375 ps or $ export DOCKER_HOST="tcp://0.0.0.0:2375"$ docker ps |
| -icc=true | Set to enable communication for inline containers. |
| --ip="0.0.0.0" | Set the default IP address used when the container is bound to IP |
| --ip-forward=true | Set net.ipv4.ip_forward to start the container |
| --iptables=true | Set custom iptable rules for launching Docker containers |
| --man = 0 | Set the MTU value of the container network. If this parameter is not present, the default route MTU is used. If there is no default route, it is set to a constant value of 1500. |
| -p, --pidfile="/var/run/docker.pid" | Set the background process PID file path. |
| -r, --restart=true | Set the container that was running before restart |
| -s, --storage-driver="" | Set the container runtime to use the specified storage driver, for example, specify the use of devicemapper, you can do this: docker -d -s devicemapper |
| --selinux-enabled=false | Set to enable selinux support |
| --storage-opt=[] | Set the parameters of the storage driver |
Docker configuration file location
Docker's configuration file can set most of the background process parameters, and the storage location in each operating system is inconsistent.
The location in ubuntu is: /etc/default/docker
The location in centos is: /etc/sysconfig/docker
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