Home Operation and Maintenance Docker Explore various situations not found in Docker

Explore various situations not found in Docker

Apr 25, 2023 am 09:02 AM

Docker is a popular containerization platform that allows users to quickly create, deploy and run applications. However, sometimes you may run into some issues, such as not being able to find something in Docker. This may be confusing because you may already have the required components installed.

In this article, we will explore various situations that are not found in Docker and how to solve them.

Problem 1: Docker image not found

When you want to run an image in Docker, you may encounter the following error:

docker: Error response from daemon: manifest for <image> not found
Copy after login

or:

docker: Error response from daemon: repository <image> not found: does not exist or no pull access
Copy after login

This means that Docker cannot find the required image. This can be due to the following reasons:

  1. Mirror does not exist: The image you are looking for simply does not exist.
  2. Address error: The mirror address you used may be incorrect. Please make sure you are using the correct address.
  3. Insufficient access rights: You may not have sufficient access rights to access the required image. If this is a private image, you need to use the correct credentials to access it.

Solution:

  1. Make sure the image you are looking for actually exists.
  2. Please check whether your mirror address is correct.
  3. If this is a private image, please make sure you have sufficient permissions to access it. You can log in using the following command:

    docker login
    Copy after login

Issue 2: Container not found

When you try to find the container using the following command:

docker ps
Copy after login

You may receive the following error:

docker: Error response from daemon: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
Copy after login

This means that the Docker daemon is not running.

Solution:

  1. Check if the Docker service is running:

    systemctl status docker
    Copy after login
  2. If the service is not running, use the following Command to start it:

    systemctl start docker
    Copy after login

Problem 3: Docker network not found

Docker containers usually communicate with each other over the network. If you can't find something in the Docker network, you may encounter the following error:

Get http://my-container:8080: dial tcp: lookup my-container on <DNS server>: no such host
Copy after login

This means that Docker cannot resolve the container's hostname.

Solution:

  1. Make sure your container has joined a Docker network. You can use the following command to check:

    docker network ls
    Copy after login
  2. If your container has not joined the network yet, please use the following command to add it to the network:

    docker network connect <network> <container>
    Copy after login

    Where, <network> is the name of the network you want to add the container to, and <container> is the name or ID of the container you want to add to the network.

  3. If your container still cannot resolve the hostname, please check that your DNS configuration is correct. You can use the following command to view the DNS configuration of the container:

    docker exec <container> cat /etc/resolv.conf
    Copy after login

    If this file is empty or wrong, configure the correct DNS server in the container.

Question 4: Docker data volume not found

When you try to view the Docker data volume using the following command:

docker volume ls
Copy after login

You may If you see an empty list, it means you don't have any data volumes.

Solution:

  1. Make sure you have created at least one data volume. You can use the following command to create a data volume:

    docker volume create <name>
    Copy after login

    where <name> is the name you want to specify for the data volume.

  2. If you have created a data volume, make sure it is properly bound to the container. You can use the following command to check the binding status of the container:

    docker inspect <container> | grep Volumes
    Copy after login

    If this command returns blank, your data volume is not bound correctly.

Conclusion

It’s not uncommon to not find something in Docker. Typically this is caused by misconfiguration or issues with the Docker environment. In this article, we discuss various scenarios in which images, containers, networks, and volumes are not found in Docker and provide solutions to related issues. By following these steps, you should be able to resolve any issues you encounter with Docker.

The above is the detailed content of Explore various situations not found in Docker. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to use docker exec to run commands in a Docker container How to use docker exec to run commands in a Docker container Mar 05, 2025 pm 03:42 PM

This article explains how to use the docker exec command to run commands within a running Docker container. It covers basic syntax, options (like -it for interactive use and -d for detached mode), shell access, common use cases (debugging, administr

What is docker for? What is docker for? What is docker for? What is docker for? Mar 05, 2025 pm 03:49 PM

This article explains Docker, a containerization platform simplifying application building, shipping, and running. It addresses the "it works on my machine" problem by packaging apps and dependencies into isolated containers, improving con

Is docker an environment or software Is docker an environment or software Mar 05, 2025 pm 03:38 PM

This article explains Docker, contrasting it with virtual machines. Docker uses containerization, sharing the host OS kernel for lightweight, resource-efficient application isolation. Key advantages include speed, portability, ease of deployment, a

How do I deploy applications to a Docker Swarm cluster? How do I deploy applications to a Docker Swarm cluster? Mar 17, 2025 pm 04:20 PM

The article details deploying applications to Docker Swarm, covering preparation, deployment steps, and security measures during the process.

What is docker for? What is docker for? What is docker for? What is docker for? Mar 05, 2025 pm 03:46 PM

Docker simplifies application building, shipping, and running via containerization. It offers consistent development environments, faster cycles, improved collaboration, and streamlined CI/CD, resulting in portable, scalable, and resource-efficient

What is docker for? What is docker for? What is docker for? What is docker for? Mar 05, 2025 pm 03:39 PM

This article explains Docker, a containerization platform simplifying application creation, deployment, and execution. It highlights Docker's benefits: improved efficiency, consistency, resource utilization, and streamlined deployment. Various use

What are Kubernetes pods, deployments, and services? What are Kubernetes pods, deployments, and services? Mar 17, 2025 pm 04:25 PM

The article explains Kubernetes' pods, deployments, and services, detailing their roles in managing containerized applications. It discusses how these components enhance scalability, stability, and communication within applications.(159 characters)

How do I scale applications in Kubernetes? How do I scale applications in Kubernetes? Mar 17, 2025 pm 04:28 PM

The article discusses scaling applications in Kubernetes using manual scaling, HPA, VPA, and Cluster Autoscaler, and provides best practices and tools for monitoring and automating scaling.

See all articles