以字符串形式运行命令时，Docker exec错误“在$ PATH中找不到可执行文件：未知”

Question

Below is the command I am trying to run:

docker exec sandbox_1 'influxd-ctl sandbox_1:8091'

I understand that apparently this means the container will execute it with a different shell that does have the necessary $PATH but I'm not sure how to deal with that.

For what it's worth, I tried influxd-ctl without the single quotes and it didn't read the rest of the command.

docker exec sandbox_1 influxd-ctl sandbox_1:8091

Thoughts?

Update: I also tried running bash -c <string> as the command I passed to exec but that didn't seem to work either.

Answer 1

Single quotes shouldn't be used. The Exec Command takes the command and it's arguments as separate arguments.

The correct command in your case should be:

docker exec <container> influxd-ctl <container>:8091

You can also test the command when having a shell inside the container like this:

docker exec -it <container> bash

You should then (provided bash is available inside the container, otherwise other shells can be used instead) get a root shell like this:

root@<container>:~# 

Note: The working dir might be different based on where it was set in the Dockerfile used to build the image of the container.

In the now interactive shell talking to the container, you can try your command explicitly without the Exec command passing stuff around.

root@<container>:~# influxd-ctl <container>:8091

If you find that your command doesn't work there, then probably the influxd-ctl command expects different parameters from what you are suggesting.