Docker exec via rancher API

Question

I'm hoping that its possible to do this something like this via Rancher's REST API. Does anybody know if its possible?

cat data.txt | docker exec -i my_container sh -c 'cat >/data.txt'

Seems I can interact with docker exec using this:

curl -X "POST" "http://123.123.123.123:8080/v2-beta/containers/1i177?action=execute" \
     -H "Cookie: PL=rancher" \
     -H "Content-Type: application/json" \
     -u user:password \
     -d $'{
    "attachStdin": true,
   "attachStdout": true,
    "command": [
        "ls"
], 
"tty": true
}'

Which returns this:

url":"ws:\/\/123.123.123.123:8080\/v1\/exec\/"

So I assume I need to connect to this using a WebSocket?

Answer 1

Yes, with the token that was also included in that response either as a header (Authorization: Bearer <token>) or query param (?token=<token>).

You also probably want tty: false, since it is unlikely you are a TTY :-)