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?
升级后,我的权限被拒绝了。
执行安装步骤后的“mkb”步骤不会改变任何东西,因为我的用户已经在“docker”组中;我试了两次都没有成功。
经过一个小时的搜索,下面的解决方案终于起作用了:
sudo chmod 666 /var/run/docker.sock
解决方案来自奥尔尚斯克。
看起来升级已经重新创建了套接字,但没有给docker组足够的权限。
问题
这个硬chmod打开安全漏洞,每次重启后,这个错误会一次又一次地启动,每次都必须重新执行上面的命令。我要一个彻底的解决办法。为此你有两个问题:
1) Problem with SystemD : The socket will be create only with owner 'root' and group 'root'.
You can check this first problem with this command :
ls -l /lib/systemd/system/docker.socket
If every this is good, you should see 'root/docker' not 'root/root'.
2 ) Problem with graphical Login : https://superuser.com/questions/1348196/why-my-linux-account-only-belongs-to-one-group
You can check this second problem with this command :
groups
If everything is correct you should see the docker group in the list.
If not try the command
sudo su $USER -c groups
if you see then the docker group it is because of the bug.
解决方案
如果你设法得到一个图形登录的工作,这应该做的工作:
sudo chgrp docker /lib/systemd/system/docker.socket
sudo chmod g+w /lib/systemd/system/docker.socket
但如果你不能控制这个bug,一个不错的解决方案可以是:
sudo chgrp $USER /lib/systemd/system/docker.socket
sudo chmod g+w /lib/systemd/system/docker.socket
这种工作是因为您处于图形化环境中,并且可能是计算机上唯一的用户。
在这两种情况下,您都需要重新启动(或sudo chmod 666 /var/run/docker.sock)
在Centos上安装Docker后。在运行下面的命令时,我得到下面的错误。
[centos@aiops-dev-cassandra3 ~]$ 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 ~]$