我在装有Ubuntu操作系统的机器上安装了Docker。 当我跑步时:
sudo docker run hello-world
一切都很好，但是我想隐藏sudo命令以使该命令更短。 如果我写的命令没有sudo
docker run hello-world
显示如下:
docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.35/containers/create: dial unix /var/run/docker.sock: connect: permission denied. See 'docker run --help'.
当我试图跑步时，同样的情况也会发生:
docker-compose up
我该如何解决这个问题?
当前回答
你可以按照以下步骤来做，这会对你有用:
create a docker group sudo groupadd docker add your user to this group sudo usermod -aG docker $USER list the groups to make sure that docker group created successfully by running this command groups run the following command also to change the session for docker group newgrp docker change the group ownership for file docker.socksudo chown root:docker /var/run/docker.sock change the ownership for .docker directory sudo chown "$USER":"$USER" /home/"$USER"/.docker -R finally sudo chmod g+rwx "$HOME/.docker" -R
在这个测试之后，你可以运行docker ps -a
其他回答
在Centos上安装Docker后。在运行下面的命令时，我得到下面的错误。
[centos@aiops-dev-cassandra3 ~]$ docker run hello-world
docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.soc k/v1.40/containers/create: dial unix /var/run/docker.sock: connect: permission denied.
See 'docker run --help'.
修改docker.socket的Group和Permission
[centos@aiops-dev-cassandra3 ~]$ ls -l /lib/systemd/system/docker.socket
-rw-r--r--. 1 root root 197 Nov 13 07:25 /lib/systemd/system/docker.socket
[centos@aiops-dev-cassandra3 ~]$ sudo chgrp docker /lib/systemd/system/docker.socket
[centos@aiops-dev-cassandra3 ~]$ sudo chmod 666 /var/run/docker.sock
[centos@aiops-dev-cassandra3 ~]$ ls -lrth /var/run/docker.sock
srw-rw-rw-. 1 root docker 0 Nov 20 11:59 /var/run/docker.sock
[centos@aiops-dev-cassandra3 ~]$
使用以下docker命令进行验证
[centos@aiops-dev-cassandra3 ~]$ docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete
Digest: sha256:c3b4ada4687bbaa170745b3e4dd8ac3f194ca95b2d0518b417fb47e5879d9b5f
Status: Downloaded newer image for hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/
[centos@aiops-dev-cassandra3 ~]$
这对我来说很有用:
进入容器内部并修改文件的ACL
sudo usermod -aG docker $USER
sudo setfacl --modify user:$USER:rw /var/run/docker.sock
这是一个比使用chmod更好的解决方案。
我用命令解决了这个错误:
$ sudo chmod 666 /var/run/docker.sock
它只需要更改sock文件的权限。
sudo chmod 666 /var/run/docker.sock
这肯定有用。
在我的例子中，是进程本身(CI服务器代理)试图运行一个docker命令，但无法运行它，但当我试图从同一个用户中运行相同的命令时，它工作了。
重新启动运行CI服务器代理的守护进程解决了这个问题。
之前命令在代理内部无法工作的原因是因为代理在我安装docker并授予docker组权限之前正在运行，代理进程使用缓存的旧权限并且正在失败。重新启动进程将丢弃缓存，使事情得以解决。
