不允许Docker和nginx操作

Question

我正在尝试使用Docker在Arch Linux服务器上运行Nginx。我已经创建了容器：

[root@tronagon atc]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
nginx               latest              5328fdfe9b8e        5 days ago          133.9 MB
[root@tronagon atc]# docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
[root@tronagon atc]# docker create nginx
9842dcf58c17504c3723a6c0c0648e43c17e771d2b3fe315bde2e4979536fd09

然而，当我尝试启动它时，我得到了一个System error: operation not permitted错误：

[root@tronagon atc]# docker start 984
Error response from daemon: Cannot start container 984: [8] System error: operation not permitted
Error: failed to start containers: [984]

docker守护进程肯定在运行：

[root@tronagon atc]# systemctl status docker
* docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
   Active: active (running) since Tue 2015-12-22 10:05:23 UTC; 1h 8min ago
     Docs: https://docs.docker.com
 Main PID: 908 (docker)
   CGroup: /system.slice/docker.service
           `-908 /usr/bin/docker daemon -H fd:// --exec-opt native.cgroupdriver=cgroupfs

事实上，我不能运行任何容器：

[root@tronagon atc]# docker run -it ubuntu /bin/bash
Unable to find image 'ubuntu:latest' locally
latest: Pulling from library/ubuntu
0bf056161913: Pull complete 
1796d1c62d0c: Pull complete 
e24428725dd6: Pull complete 
89d5d8e8bafb: Pull complete 
Digest: sha256:a2b67b6107aa640044c25a03b9e06e2a2d48c95be6ac17fb1a387e75eebafd7c
Status: Downloaded newer image for ubuntu:latest
exec format error
Error response from daemon: Cannot start container 224bef93152b5537c8650258172c43226243859b7047657ef488f23e195ad051: [8] System error: exec format error

有什么想法吗？

Answer 1

原来我运行的是32位操作系统——ARM v7 rev 10上的Arch Linux——容器是64位的，这就是我收到exec错误的原因。

通过docker安装，可以从默认的Arch Linux ARM存储库中获得一些ARM等效映像。运行以下程序查找它们：

docker search armhf