Docker installation and basic command __docker

installation and basic commands for Docker first, the installation of Docker

Here only the CentOS system installation docker, operating system kernel version requirements above 3.10 and must be 64 bits, generally centos 6.5 or above, if not sure, you can view the kernel version, typing command

Uname-r

Yum installation Command

Yum-y Install Docker

Install the specified version

View all Versions

Yum List Docker

Install the version, for example:

Yum-y Install docker-1.12.6

Second, Docker basic command Start Docker

Systemctl Start Docker

Or

Service Docker start

View Docker version number

Docker version

Docker run a Hello-world

Docker Run Hello-world

unload Docker, leaving data such as mirrors, volumes, containers, etc.

Yum-y Remove Docker

delete containers, mirrors, volumes, and custom configuration files

Rm-rf/var/lib/docker

Searching for mirrors, for example, searching for a nginx mirror

Docker Search Nginx

The table has five columns, meaning the following:

Nane: Mirrored warehouse Name

DESCRIPTION: Mirrored Warehouse Description

STATUS: Mirrored warehouse collection, which is how many times it was collected, indirectly indicates the degree of popularity of the warehouse

Offical: Identification is the official warehouse, OK is identified by the software's official project team to create and maintain

Automated: Identifies whether it is an automatically built mirrored warehouse

Download Mirror:

For example, to download a nginx

Docker Pull Nginx

At this point, a nginx mirror that defaults to the latest version is downloaded

If you want to download a specific version of the mirror, you need to search on the Dockerhub

And then download the version that you specified

Docker Pull nginx:1.12.2

View all mirrors on this computer

Docker images

The figure above is a mirror of my own creation, this figure is for reference only, here are five columns, respectively identifying

REPOSITORY: Mirrors the owning warehouse

Tag: Mirrored label, also can be said to be version

Image ID: Mirror ID, uniquely identifying a mirror

CREATED: Creation Time

Size: Mirrored size remove mirror, such as delete Nginx mirror

Docker RMI Nginx

can also be deleted by ID, for example, I want to remove the mirror above

Docker RMI a3c1c91c9222

Remove all mirrors

Docker Rmi-f $ (Docker images)

Three, Docker container basic command Create a new and start container, such as starting a Nginx container

Docker run--name mynginx-d-P 88:80 nginx

Here are the parameters to illustrate:

--name: Define a container name yourself

-D: Indicates running in background

-P: Port mappings, identifying the mapping of ports between host and container, 80 ports of the host's 88-port mapping container, and port consistency if this parameter is not added

In addition, the--network parameter can be added later

--network=bridge: Default option, indicates connection to the default network bridge

--network=host: Containers using the host's network

--NETWORK=CONTAINER:NAME_OR_ID: Tell Docker to let the newly created container use the network configuration of the existing container

--network=none: Do not configure the container network, users can define their own network configuration example: Start a Java container and output Hello world

What needs to be explained is the execution of the Docker Run command, which determines that the mirror exists when the container is started, does not exist, pull the mirror before starting

To view an open mirror

Docker PS

Here are seven columns to illustrate the meaning:

CONTAINER ID: Container ID, uniquely identifying a container

Image: Owning Mirror ID

Command: When a container starts and runs

CREATED: Creation Time

Status: Container state, up indicates run, exited indicates stopped

PORTS: Identifies the port number of the container outside

NAMES: Identifies the container name that is specified when the startup container executes Docker run--name, and does not specify that all containers are automatically generated for viewing

Docker Ps-a

stop container Docker stop container name or container ID, for example stop Mynginx container

Docker Stop Mynginx

Force stop container Docker kill container name or container ID

Docker Kill Mynginx

start a stopped container Docker start container name or container ID

Docker start Mynginx

Reboot container Docker restart container name or container ID

Docker Restart Mynginx

Enter container Docker exec-it container name or container ID bash-i: Standard input to container-T assign a virtual terminal

Docker exec-it Mynginx Bash

Delete Container Docker RM container name or container ID

Docker RM Mynginx

Remove all containers

Docker Rm-f $ (Docker ps-a-Q)

modify the container to form a new mirror

Docker commit-a "Chicu"-M "New image" Java newimage/java:lasted

-A: Author

-M: Description

Java: Is the name of the container I created

newimage/java:lasted: Mirrored library/Mirror name: Label