This article focuses on the Docker image, container, warehouse basic concepts of knowledge.
Docker concept
Docker is an open source application container engine that allows developers to package their apps and dependencies into a portable
, SHELL, USER, LOGNAME, PATH,# and start a login shell."$NSENTER" $OPTS su-rootElse# Use the env to clear all host environment variables."$NSENTER" $OPTS env--ignore-environment--"$@"FiFiuse Nsenter to enter Docker containerAfter the Docker container is run, how does it enter the c
see on the second machine Docker0 IP is the 172.17.0.2/16,docker container that obtains IP from Docker0 's network, and on the second machine, the Docker container's IP range is limited to 172.17.2.1/24 network segment.
Test host1
View IP to ensure connectivity to Host2 DOCKER0IP
root@controller:~# ifconfig docker0
docker0 Link encap:ethernet hwaddr 00:0c:2
In front of our lab environment, only one Docker host container is running on this host. However, in a real environment, there will be multiple host containers that start, run, stop, and destroy related containers in these hosts, regardless of whether they are located in the same host.How can we manage such a multi-host environment efficiently?The first problem w
This article is from the "Knowledge Forest"
Three networks (Docker network LS) are default when the Docker service is successfully installed:
C:\users\zsl-pc>docker Network LS
network ID NAME DRIVER SCOPE
992344cd89fe Bridge Bridge local
06445f4f5774 host host local
2d964ece79b9
the visual UI shape generated by multiple microservices and the restoration and high availability arrangement of microservices and multi-container application business processes in microservices, to achieve high scalability and availability, use Azure Service FabricDocker application development process Docker Application Development workflow to deploy a single contain
environment.Docker example
Create a Dockerfile file under a folder with the following contents:
# Use an official Python runtime as a parent imageFROM python:2.7-slim# Set the working directory to /appWORKDIR /app# Copy the current directory contents into the container at /appADD . /app# Install any needed packages specified in requirements.txtRUN pip install --trusted-host pypi.python.org -r requirements.txt# Make port 80 available to
Use a lightweight and flexible VM of the Docker container to take over the dependency on hell. Learn how Docker is based on LXC technology to make apps portable and independent by packaging applications in containers. Imagine that you can easily package the application and its dependencies, and then test the labels in other development and testing scenarios:
to a local mirror library, for example[Plain]View PlainCopy
sudo docker load--input Ubuntu_14.04.tar
Or[Plain]View PlainCopy
$ sudo docker load
This imports the image and its associated metadata information (including tags, and so on).Ii. container-related commands1. Start the containerThere are two ways to start a
Windows. The advent of Windows containers opens New horizons for the container of traditional Windows server-side applications, such as placing qlik sense servers in containers to instantly orchestrate clusters.Previously, Docker also launched a release version of Windows 10 that uses Hyper-V to run a Linux virtual machine as a
then create a new Dockerfile file in itThe file contents are as followsWhere the red box is the name of the jar package after the item is packaged, the default is Artifactid-version.jar, and we can see that there is a running tag on the left, yes, this is the button that is used to build the jar into the image in idea and then put it in the Docker. But we need to configure it first.We first configure the image name and the
container
The Docker container is an embodiment of the operating state of the Docker mirror. Generally, it is on top of the Docker mirror that the process runs. There are two ways in which a process can be started, in which the user may choose to
This is a creation in
Article, where the information may have evolved or changed.
"Editor's word" is the collective idea of the operation of the company, but also a deep understanding of technology people, this article is the author in the practice of immutable infrastructure concept of the process of understanding the container, this is the first article, This paper focuses on the differences between traditional operational tools such as chef and
container ecosystem. So the Windows container is called Docker on Windows. The advent of Windows containers opens New horizons for the container of traditional Windows server-side applications, such as placing qlik sense servers in containers to instantly orchestrate clusters. Previously,
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 to complete.
This article uses Redis
Want to build a Jenkins environment in Docker. At the beginning I wanted to pull CentOS first, and then I built the environment inside, the environment can run, but I do not know which data to mount, which is why I am not familiar with Jenkins.Colleague told me a new idea https://registry.hub.docker.com/_/jenkins/in th
Docker image, container, warehouse concept
Docker mirroring
Docker mirroring (image) is similar to a virtual machine image, and can be interpreted as a read-only template for the Docker engine, including a file system.
For example, a mirror can fully contain the Ubuntu op
image. In summary, the process is run on top of the Docker image. There are two ways that a process can be started, which allows the user to choose to run their own specified commands, or to run the commands specified inside the Docker image.The file system of the
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