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rmi [image]
docker rmi training/sinatra
Note: This tag is used by default when the tag name is not specified in the image latest. However, the meaning of latest is not the same as the head of the VCS, it is not the latest image, just the image that represents the tag name latest. If there is no image with the tag name called latest, it will be an error.SummarizeAlthough Docker is a virtualiza
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Because the installation process in the container is completed quickly, a container that is not running may be stopped ). In this case, the docker ps command does not display any content because no container is running.Run the
months. Figure 1. Trend Map of Docker software on Google search in the past 12 months
JIMMYJMH translated 2 years ago 3 Human top top translation is good!
under the hood Docker uses some powerful kernel-level technology and gives us the power to reach. The concept of contain
and Docker, there is indeed a history. The story begins in February 2013, when the American DotCloud company released a new Linux container software Docker and set up a website to publish its first demo version (see Docker's first official blog). And almost at the same time, in March 2013, California, the young handso
Install vim In the docker container, and install vim In the docker container
When using docker containers, sometimes vim is not installed. When you press the vim command, the system prompts vim: command not found. At this time, you need to install vim, however, when you pre
1, from the container inside copy files to host.
Answer: Execute the following command in the host
Docker CP container name: The path of the file to be copied inside the container to be copied to the appropriate path of the host
Example: Assuming that the container is name
After the front upload files to the server, the server returned to the foreground of the file list in Chinese garbled, all the Chinese file name into? , the English file name is displayed normally.
The problem is positioned to find that the Multipartfile class of the background code has this exception when executing the Transterto method, but Multipartresolver and encodingfilter in the configuration file set are already UTF-8. Excludes code exceptions. KUBECTL exec enters into the
Docker container data management and operation tutorial, docker container Data Management
Docker data volumes
What is a data volume?
Features of data volumes
Relationship between data volumes and containers
Add volumes for containers
Add permissions for data vo
port 80 on the respective container.
User namespaces
Starting with Linux 2.6.23 completed on Linux 3.8)
User and group ID spaces
The user and group IDs of the processes in user namespace can be different from the host, and each container can have a different user and group ID, and a non-privileged user on a host can be a privileged user in the user namespace ;
The conc
ReadOnly modification, using the cow (Copyon Write) technology, copy the file to the Read-wirte layer and modify, the actual user sees the current container layer of files, image files will not be affected• In addition to baseimage, each layer of image has a parent image (for example, Debian, (debian+emaces))• A mirror without parentimage is called base image (for example, kernal)• Cow based technology, the image part is not modified, so
(1) Pull a new CentOS image for Docker pulls centos:7.2
(2) Running a container, ready to install the necessary environment
Docker run--privileged--dns 8.8.8.8--dns 8.8.4.4-h controler--name slurm_control-i-t-v/container_data/:/data C Entos:centos7/bin/bash
(3) Install the SSH environment inside the container
Yum Insta
nvidia-dockeris a can be GPU used docker , nvidia-docker is docker done in a layer of encapsulation, through nvidia-docker-plugin , and then call to docker on, its final implementation or on docker the start command to carry some
Docker container File system
DockerfileSoftware is the raw material, Docker镜像 is the software delivery, but it Docker容器 can be considered as the operating state of the software. From the point of view of application
Part-2 container (Container) IntroductionThe Docker architecture has three levels, from high to low as follows:
Stack (Stack)
Services (Service)
Containers (Container)
These are now exposed in the layer of the container, similar to the underlying founda
technology developed by the company to run cloud services on thousands of servers. It is written in the Go language. The Go language is a static programming language developed by Google based on C language and with loose syntax. After six to nine months of rapid development, the company hired a new CEO, joined the Linux Foundation, and changed the company name to Docker, it also announced that it would focus on the development of
Three major docker components: container and docker1. containers are another core concept of Docker.
Simply put, containers are one or more applications that run independently and Their runtime environments. The virtual machine can be understood as a simulation.A complete set of operating systems (including the running environment and other system environments) a
start container docker run-ti Ubuntu/bin/bash
Docker run = First Docker Create and then Docker start
-T means to have Docker assign a pseudo terminal and bind to the container's standard input
When the-T is used, the command
Docker provides a simple command of the Operation container. But his command of the container does not belong to the system.
Because it is too simple, there must be a lot of deficiencies. For example, starting order, dependency checking, failure service recovery, and so on, all need a mature system service management software
Dockerfileis the raw material of the software, Docker镜像 is the delivery of the software, but it Docker容器 can be considered as the operating state of the software. From the perspective of application software, Dockerfile,
Docker Quick Start series (2): container concepts and related operations, docker Quick StartWhat is container
To put it simply, an image requires a carrier, which is a container. As mentioned in the previous article, an additional writable file layer will be started after th
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