默认容器网络创建失败！Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

您在使用Docker时遇到了一个常见的问题。错误信息"Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?"表示无法连接到Docker守护程序。这通常是由于Docker服务未启动引起的。

您可以尝试以下解决方法：

1. 检查Docker服务是否正在运行。您可以在终端中执行以下命令来启动Docker服务：

   sudo service docker start

2. 如果Docker服务已经在运行，您可以尝试重新启动它：

   sudo service docker restart

3. 如果您没有适当的权限来管理Docker服务，可以使用sudo命令以管理员身份运行上述命令。

请注意，解决此问题可能需要管理员权限。如果问题仍然存在，请提供更多详细信息，以便我们能够更好地帮助您解决问题。

相关问题

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon

The error message "Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?" indicates that there is a problem connecting to the Docker daemon. The Docker daemon is responsible for managing Docker containers and must be running for Docker commands to work.

In the provided references, the user encountered this issue after restarting the server, and the Docker containers were not working. They tried various solutions but were unable to resolve the problem until they manually started the Docker daemon.

To fix this issue, you can try the following steps:

1. Check if the Docker daemon is running by using the command: [2]

systemctl status docker

This command will show the status of the Docker service. If it is not running, you will need to start it.

2. Start the Docker daemon by using the command: [2]

dockerd

This command will start the Docker daemon and allow you to connect to it.

3. If the above steps do not resolve the issue, you can try restarting the Docker service: [2]

systemctl restart docker

This command will restart the Docker service and may help in resolving any underlying issues.

Additionally, you can use the following commands for troubleshooting:
- To check the running services, you can use: [3]

systemctl | grep running

This command will show the list of running services, and you can check if the Docker service is listed.

- To view the Docker service startup logs, you can use: [3]

journalctl -u docker

This command will display the logs related to the Docker service startup, which can help in identifying any errors or issues.

Remember to check the system requirements and ensure that Docker is properly installed and configured on your CentOS system.<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *2* *3* [cannot connect to the docker daemon at unix ///var/run/docker.sock. Is the docker daemon running?](https://blog.csdn.net/l751475472/article/details/122968595)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 100%"]
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cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running

这个错误提示表明Docker客户端无法连接到Docker守护进程。Docker守护进程是Docker的核心组件，负责管理Docker镜像、容器和网络等资源。如果Docker守护进程没有运行或者无法访问，就会出现这个错误。解决方案如下：
1. 确认Docker守护进程是否正在运行。可以使用以下命令检查Docker守护进程的状态：

   sudo systemctl status docker

如果Docker守护进程没有运行，可以使用以下命令启动它：

   sudo systemctl start docker

2. 确认当前用户是否具有访问Docker守护进程的权限。可以将当前用户添加到docker用户组中，以便具有访问Docker守护进程的权限：

   sudo usermod -aG docker $USER

然后注销并重新登录以使更改生效。
3. 确认Docker守护进程的套接字文件是否存在。可以使用以下命令检查套接字文件的状态：

   ls -l /var/run/docker.sock

如果套接字文件不存在，可以使用以下命令重新启动Docker守护进程：

   sudo systemctl restart docker

如果问题仍然存在，可以尝试卸载并重新安装Docker。