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Editor to share with you what the Docker run process and the basic commands of mirroring are, I believe most people do not know much about it, so share this article for your reference. I hope you will learn a lot after reading this article. Let's learn about it together.

1. The workflow of run

When we finish installing the Docker engine, we verify that Docker Engine is installed correctly by running the hello-world image:

Let's analyze the execution flow of the run command: the execution flow chart of run is as follows

When we try to run an image that can't be found on either native or DockerHub:

Start the Docker engine first:

Systemctl start docker

Then test it:

Docker run wanliguyicheng123456789

Docker returned an error and the mirror could not be found.

2. Basic commands for mirroring

List a list of images

We can use docker images to list the images on the local host.

Description of each option:

REPOSITORY: indicates the warehouse source of the image

TAG: the label of the image

IMAGE ID: the ID of the mirror, all mirrors are identified by a 64-bit hexadecimal string (internally a value of 256 bit). To simplify use, the first 12 characters can form a short ID that can be used on the command line. Short ID still has a certain probability of collision, so the server always returns long ID.

CREATED: the time when the image was created

SIZE: size of the mirror

Note: the same warehouse source can have multiple TAG, representing different versions of the warehouse source.

Optional parameters:

Name, abbreviated description-all,-a lists all mirrors (the default hides intermediate mirrors)-quiet,-q shows only the mirrored iddocker images-qfeb5d9fea6a5

Search for an image

We can search for images from the Docker Hub website. The Docker Hub URL is: https://hub.docker.com. For example, we want to search for images of mysql:

You can also use the docker search command to search for mysql images.

Docker search mysql

Description of each option:

NAME: name of the image warehouse source

DESCRIPTION: description of the mirror

OFFICIAL: whether docker is officially released

STARS: similar to star in Github, it means to like and like it.

AUTOMATED: build automatically.

Optional parameters:

Name, abbreviated description-filter,-f filters the output based on the criteria provided

Search for mysql images with more than 3000 STARS:

Docker search mysql-f=stars=3000

Download the image

Syntax:

Docker pull [OPTIONS] NAME [: TAG | @ DIGEST]

OPTIONS description:

-a: pull all tagged images

-- disable-content-trust: ignore the verification of the image and enable it by default

Test: use the command docker pull to download the mysql image

Docker pull mysql

Download the specified version of mysql image: first of all, this version should be supported in Docker Hub

Docker pull mysql:5.7

Use the docker images command again to view the downloaded image:

Delete Mirror

Delete by image name:

Docker rmi-f mysql

Parameter description:-f: force deletion

Delete by mirroring ID:

Docker rmi-f 8b43c6af2ad0

Delete multiple images: multiple id images are separated by spaces

Docker rmi-f image id image id

Delete all mirrors: find out all mirrors id first, and then delete mirrors one by one through mirror id

Docker rmi-f $(docker images-aq)

All mirrors have been deleted!

The above is all the contents of this article entitled "what are the basic commands of Docker run process and mirroring". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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