docker机器中awk的意外行为

受此启发，我正试图在Mac电脑上使用

docker machine

来阻止一个正在运行的容器。但是，

awk

在

docker-machine-ssh

中的行为似乎与直接“在”容器中运行时不同

当我直接通过ssh连接到容器时，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

但远程运行时，

awk

的行为不同：

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机器下表现不同

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


$ ==> \$

docker ps-q