exec Stream Doesn't Emit End Event #534
Description
I want to execute a command in an already running container using "exec". For some reason, the stream returned by "exec.start()" is not emitting the "end" event. So, I have no way of knowing when the command completes and the Node process doesn't end.
Example code is below. Am I doing something wrong, or is this a bug?
const Docker = require("dockerode");
const docker = new Docker();
const PassThrough = require("stream").PassThrough;
(async () => {
try {
// Create/start container, if necessary.
let container = docker.getContainer("test");
let info;
try {
info = await container.inspect();
}
catch (error) {
if (error.statusCode !== 404)
throw error;
container = await docker.createContainer({
Image: "ubuntu",
Tty: true,
name: "test"
});
}
info = await container.inspect();
if (info.State.Running !== true)
await container.start();
// Execute 'cat' with data piped to stdin.
const exec = await container.exec({
AttachStdin: true,
AttachStdout: true,
AttachStderr: true,
Tty: false,
Cmd: ["cat"]
});
const stream = await exec.start({
hijack: true,
stdin: true
});
const input = new PassThrough();
input.write("test one\ntest two\n");
input.pipe(stream.output);
docker.modem.demuxStream(stream.output, process.stdout, process.stderr);
stream.output.on("end", async () => { // Event is not emitted.
console.log(await exec.inspect());
});
}
catch (error) {
console.error(error);
}
})();