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computing resources, and provides developers and managers with services that can be quickly built, transferred, and run to deliver distributed applications to other Docker containers.What's special about Docker technology is that instead of using configuration files like puppet and chef, the Docker engine, a lightweight runtime environment, packaging tools, and
Linux-based isolated and shared computing resource Container Ecosystems , and provides developers and managers with services that can be quickly built, transferred, and run to deliver distributed applications to other Docker containers. The special thing about Docker technology is that it doesn't look like Puppet The configuration file, like chef, uses the
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.
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14.04 dea1945146b9 2 months ago 188MB
The build process for the entire image depends on the environment. If your network speed is general, this build process may take you more than 10 minutes or more. Eventually, as we would like, the container based on the repodemo/httpd:latest image will work:
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StartThere are two ways to start a container, one is to create a new container based on mirroring and start Docker run, and the other is to restart the Docker container
provides services for Zedapp file editing. Zedrem is packaged in a docker image: sequenceiq/zedapp
Here is a script to help run the zed server locally and run the zed client: zed in the target container
Install the docker image and shell script:
A wild full-stack engineer configures the scheduled task crontab (DaoCloud + Docker + Laravel5) in a Docker container and prefers to study various new technologies.
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Recently, the project involves the function of a scheduled task. so I went to study how to use crontab over the past few days and successfully enabled the function on my computer accord
isd3a1f33e8a5a513092f01bb7eb1c2abf4d711e5105390a3fe1ae2248cfde1391
We view container-level content
$ cd /var/lib/docker/aufs/diff/d3a1f33e8a5a513092f01bb7eb1c2abf4d711e5105390a3fe1ae2248cfde1391$ ls
We see the Rootfs file directory as shown, and this image as the root of the Images, we use the final image
Container interconnect-linking System in DockerDocker has a linking system that can connect multiple containers. It creates a pair of parent-child relationships that can see the selectedThe information for the child container.1) naming System for containersThe linking system executes according to the name of the container. When we create a
This is a creation in
Article, where the information may have evolved or changed.
The research on the container network has been interrupted for some time due to the reasons for the exchange of work in 2016. With the current project to kubernetes application in depth, I feel that before the shallow understanding of the container network is not enough, the container
Container interconnect-linking System in DockerDocker has a linking system that can connect multiple containers. It creates a pair of parent-child relationships that can see the selectedThe information for the child container.1) naming System for containersThe linking system executes according to the name of the container. When we create a
Docker data volumes and data containers
These two days began to learn Docker, found that Docker is really strong, so that the site deployment and maintenance efficiency greatly improved. So ready to be on hand to maintain a few station, all Docker. It is felt in the process of finishing that
graph directory of the extra folder is actually a layer. These layers are associated with a layer named after our mirror name, and the relationship is recorded in a JSON file. From this JSON file, you can see the parent image or the previous layer of the image is ..., the graph directory is also stored in this layer of information, and then look down, you can see the hierarchical relationship. In graph Thi
manually import the ││├──character.cnf ---Set character set ││└──my.cnf---extra configuration │├──data-- -Mount directory for database files │└──start.sh---container startup script The following is the startup script for the MySQL container:
#!/bin/bash#echo "---------------start MySQL image-------------------"
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES [root@i-k11xnd1o ~]# Docker ps-a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 4c7a7f772b51 Hello-world "/hello" Seconds ago Exited (0) seconds ago Hello afffac98fb
interfacesBr0 8000.7e6e617c8d53 no em1Vethe6e5
In this way, containers are directly exposed to the physical network, and containers of multiple physical hosts can also be connected to the Internet. Note that you need to ensure the network security of the container by yourself.
For more Docker tutorials, see the following:
Docker installation application (CentOS
First, list the containers that have been created on the hostDocker Ps-aSecond, create an interactive containerCommand: Docker run-i-T Ubuntu/bin/bashWhere-i-t represents the creation of a container that provides an interactive shell.Ubuntu is the name of the image, if it does not exist locally, go back to the repository to download./bin/bash is the command that
About Docker Core ConceptsMirroring is a read-only template for the Docker engine that contains the file system.Mirroring is the basis for creating a container that resembles a sandbox for running and isolating applications.A container is a running instance of an application created from a mirror, which can be started,
final mirror ubuntu:latest is on the basis of this image based on the relationship of each level dynamically added.
As pictured above, the mirror ID under/var/lib/docker/graph and mirrored JSON, look at the contents of the JSON file as follows:
All metadata, including all the parent mirror IDs, the commands executed on the parent mirror ID, and the build mirror ID, are included as shown in the figure a
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