How to solve the problem that centos7 docker cannot be started after reinstallation

CentOS7 Docker cannot be started after reinstallation, which may be caused by a variety of reasons. Several possible causes and corresponding solutions are described below.

1. Docker image installation failed

If you encounter an error during the installation of the Docker image, such as download failure, installation failure, etc., it may cause Docker to appear. Unable to start.

Solution:

You can reinstall the Docker image and try to use other images to reinstall. You can also check whether the network connection is normal.

2. The Docker container is damaged

When the Docker container is damaged, it will cause Docker to fail to start. For example, if you perform dangerous operations in the container or the files inside the container are damaged, the container may be damaged.

Workaround:

The damaged container can be deleted and recreated. At the same time, when creating a Docker container, you can use storage volumes to avoid data loss.

3. Problems with Docker’s underlying file system

Docker’s underlying file system (aufs) may have problems under certain circumstances, causing Docker to fail to start.

Solution:

You can try to use other file systems, such as btrfs or zfs. At the same time, you can also upgrade the Docker version or change the operating system version.

4. The Docker Daemon service fails to start normally

When the Docker Daemon service fails to start normally, it will cause Docker to fail to start.

Solution:

You can check the log of the Docker Daemon service to see if there is any error message. If so, you can solve the problem based on the error message. At the same time, you can also restart the Docker Daemon service and restart Docker.

Summary:

As a lightweight virtualization technology, Docker is receiving more and more attention in enterprise-level applications. However, whether you are a novice or an experienced user, you may encounter the situation where Docker cannot start. This article lists several possible causes and corresponding solutions, hoping to help everyone solve this problem. In the process of using Docker, it is also necessary to back up data in time and perform regular maintenance and upgrades to ensure the stability and security of Docker.

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