How to delete docker images/containers
Docker images often occupy hard disk space unconsciously. To clear redundant images, you can use the following methods:
1. Enter the root permission
Sudo su
2. Stop all container to delete
Four Docker containers and four docker containersAfter using Docker to create a container, you are concerned about how to enter the container. In fact, there are several ways to enter the Docker container, here we will talk about several common methods to enter the
-only, so multiple containers can share the same mirror
When you delete a container, Docker daemon deletes the container layer, preserving the mirroring layer
2. Image storage Mode
To differentiate the mirroring layer, Docker calculates the UUID for each mirror layer, and before Do
. more Simple Management
With Docker, you can replace a lot of previous updates with just a little bit of modification. All modifications are distributed and updated incrementally, enabling automation and efficient management. Compare traditional virtual machine summaries
features
Container
Virtual Machines
Start
Second level
Minutes is
Hard disk use
This article hopes to help readers understand the differences between the Docker commands, the container (container) and the image (image), and delve into the differences between the containers and the containers that are running.When I was smattering with Docker technology, I found it very difficult to understand Dock
can be seen by other containers.
For example, create a test file in the dbdata container:
root@df392e32f0p6:/# touch test1root@df392e32f0p6:/#lstest
We can view it in the db1 container:
docker run -ti --volumes-from dbdata --name db1 ubuntu:14.04root@92597e32f0p6:/# ls dbdata/test
We can use the-volumes-from parameter multiple times to mount multiple volumes from multiple
Source: http://blog.csdn.net/anxpp/article/details/52476339
Containers are another core concept of Docker.
In general, a running instance of a mirror is a container, and the container provides a writable file layer.
This article describes the same structure as the mirror, and introduces the container gradually. 1. Create a container
Docker
Python scripts monitor docker containers and pythondocker containers
This article provides an example of how to monitor docker containers using python scripts for your reference. The details are as follows:
Script Function:
1. Monitor CPU usage
2. Monitor memory usage
3. Mon
Previously, we introduced the basic concepts of docker (not translated before...), learned how to use docker images for work, and learned how to use docker images.Links between containers. This section describes how to manage data in and between containers.
We will look at
The Docker containers under the same host are mutually connected by default. The IP address can be viewed by Docker inspect ID or name. Ping can be ping in a container that does not pass.
But we found by observation that each boot container's IP address is not fixed, so if we use IP address to achieve interconnection is obviously not reliable. But we found that t
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Description
--name: The name of the container (can be customized)
-d-p 2,222:22 (using the host's 2222 port to map to the 22 port of the Docker container)
If you start an error,
Conflict. The name "/base" is already on use by container
Remove the old container and start again.
3. View Container:
Docker PS (view running
Mirror1. Get the mirrored Docker pull dl.dockerpool.com:5000/ubuntu:14.04 (dl.dockerpool.com is the registered server, 5000 is the port number, Ubuntu is the warehouse name, 14.04 is the image is the version number ) 2. View the image information Docker images (list all mirrors that are already in the local host) change the changes information
In a Docker infrastructure, the Docker containers are created using images. Containers are instances that are created when the image files are executed. These images can is of Web servers, mail servers, applications, and so on.
Docker images are stored in locations knows as
In this lesson, we'll find out the basics of running Docker containers. We'll go to the download images from Docker Hub, what's happens when you stop containers, how to restart a container on Ce it ' s been stopped, and also how to remove containers.Run a container:Docker run MONGO // run the container, if container
=" float: none; "title=" Picture13.png "alt=" Wkiol1etfpsqntifaacdr0xaboa974.png "/>Container IP settings succeededDocker common Operations:Docker PS View the currently running containerDocker ps-a View all containers (including containers for running)Docker ps-q View container IDDocker Stop/start test Close or open co
Docker installation
I was installed on Ubuntu 16 Docker,linux installation Docker only need one command:
sudo apt-get install Docker.io
After running, you can enter Docker in the terminal to see the following information to prove that our installation was successfulNote: Add sudo if prompted permission issue
DockerUsag
permissions that can is given to the child processes. Child processes cannot acquire newer capabilities. The idea behind capabilities are that no process should have all privileges, but instead, have only enough privileges to PE Rform their intended service. By bootstrapping processes with limited privileges, we can "contain" the damage this can occur if they are ever compromise D.
Some capabilities give excessive privileges to processes such as:
Sys
case in hand. As far as I know, a docker is presented to me, which contains a new image of the current state of a container. This will include all the OS data I'm interested in except for persistent data.SvenOh, crud. You're right, the volume path is currently static. So you need a step1. You have existing data containers in/data2. Migrating to a temporary data
://s3.51cto.com/wyfs02/M00/6C/00/wKioL1U9sEyCfKfCAAEnlNo6yAc049.jpg "title=" Picture 9.png "alt=" Wkiol1u9seycfkfcaaenlno6yac049.jpg "/>with do not close the container after exit, but continue running in the background Delete ContainerYou can use the Docker RM command to remove a container in the terminated state, which is formatted as Docker rm , and the supp
you want to delete a layer on layer B, it is not a real deletion, but a layer of the B layer of the tag to delete, in fact, there is a layer of a mirror, the equivalent of the deletion of a shortcut.
Therefore, the construction should only contain what the layer should be, and the extra stuff will be cleared away.
One of his advantages here is reuse, which is that you can use a built mirror as the basis fo
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