来自docker-machine

Question

受this post的启发，我试图在我的Mac上使用docker-machine来停止正在运行的容器。但是，awk在docker-machine ssh中的行为似乎与在容器中直接运行时的行为不同。

当我直接ssh到容器时，一切都按预期工作：

me@myMac:~$ docker-machine ssh default
docker@default:~$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                NAMES
028fd7148881        myrepo/mycontainer  "apachectl -DFOREGROU"   14 minutes ago      Up 14 minutes       0.0.0.0:80->80/tcp   gloomy_mayer
docker@default:~$ docker ps | awk 'NR > 1 {print $1}'
028fd7148881
docker@default:~$ docker ps | awk 'NR > 1 {print $1}' | xargs --no-run-if-empty docker kill
028fd7148881
docker@default:~$ docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

但是当远程运行时，awk表现不同：

me@myMac:~$ docker-machine ssh default "docker ps"
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
7927b10b8a28        myrepo/mycontainer  "apachectl -DFOREGROU"   11 seconds ago      Up 10 seconds       80/tcp              happy_wozniak
me@myMac:~$ docker-machine ssh default "docker ps | awk 'NR > 1 {print $1}'"
7927b10b8a28        myrepo/mycontainer  "apachectl -DFOREGROU"   About a minute ago   Up About a minute   80/tcp              happy_wozniak
me@myMac:~$ docker-machine ssh default "docker ps | awk 'NR > 1 {print $1}' | xargs --no-run-if-empty docker kill"
7927b10b8a28
Failed to kill container (myrepo/mycontainer): Error response from daemon: Cannot kill container myrepo/mycontainer: No such container: myRepo/myContainer
Failed to kill container (apachectl -DFOREGROU): Error response from daemon: Cannot kill container apachectl -DFOREGROU: No such container: apachectl -DFOREGROU
Failed to kill container (3): Error response from daemon: Cannot kill container 3: No such container: 3
...

为什么awk在docker-machine下的行为有所不同？

Answer 1

"docker ps | awk 'NR > 1 {print \$1}' | xargs --no-run-if-empty docker kill"


$ ==> \$

docker ps -q