Dockerode: .pull Unhandled rejection error: HTTP code is 404... no such container... no such image.

[lgomez]

Hi,

I'm trying to use pull in a promise but keep getting this error that haven't been able to track down.

This is the initial function:

function pull(service) {
  var opts = {};
  log.info('Pulling: %s', service.Image);
  if (service.Image.indexOf('gcr.io') > -1) { // if the image is in gcr.io (ie: private)
    opts.authconfig = auth; // add authconfig
  };
  return new Promise(function(resolve) {
    docker.pull(service.Image, opts, function(err, stream){
      docker.modem.followProgress(stream, function(err, out){
        resolve(service);
      }, function(event){
        // log.info({ event: event }, 'Pull Progress:');
      });
    });
  });
}

I call this like so (pseudo code to illustrate):

pull({Image: ''}).then(/*...*/);

Debug shows:

modem Sending: { path: '/images/create?authconfig=&fromImage=gcr.io...&tag=0.0.1',
  method: 'POST',
  headers:
   { 'X-Registry-Auth': '...',
     'Content-Type': 'application/json',
     'Content-Length': 177 },
  key: <Buffer ... >,
  cert: <Buffer ... >,
  ca: <Buffer ... >,
  hostname: '192.168.99.100',
  port: '2376' } +8ms
  modem Sending: { path: '/containers/create?Image=gcr.io...%3A0.0.1&name=db&Labels=&Hostname=db&ExposedPorts=&PortBindings=',
  method: 'POST',
  headers: { 'Content-Type': 'application/json', 'Content-Length': 175 },
  key: <Buffer ... >,
  cert: <Buffer ... >,
  ca: <Buffer ... >,
  hostname: '192.168.99.100',
  port: '2376' } +2ms
  modem Received: No such image: gcr.io/...:0.0.1 (tag: 0.0.1)
 +126ms

And then I get this error BUT the pulling does continue...

Unhandled rejection Error: HTTP code is 404 which indicates error: no such container - No such image: gcr.io...:0.0.1 (tag: 0.0.1)

    at .../node_modules/docker-modem/lib/modem.js:230:17
    at getCause (.../node_modules/docker-modem/lib/modem.js:258:7)
    at Modem.buildPayload (.../node_modules/docker-modem/lib/modem.js:229:5)
    at IncomingMessage.<anonymous> (.../node_modules/docker-modem/lib/modem.js:205:14)
    at emitNone (events.js:72:20)
    at IncomingMessage.emit (events.js:166:7)
    at endReadableNT (_stream_readable.js:905:12)
    at doNTCallback2 (node.js:452:9)
    at process._tickCallback (node.js:366:17)

...eventually the pulling does complete but I want to handle that error correctly.

Notes:

• In my case I do not care to track progress, I just want to resolve the promise when the pulling is complete.
• I expect images not to be present at first so this is not an unexpected error, I just don't know how to handle it to prevent it from showing.

Thank you very much for any help. I'll keep investigating on my side.

[lgomez]

Note that I realize this is an error bubbling up because I am not handling the rejected promise... I just don't know where the error should be handled because I'm not sure how to handle it around dockerode.

[lgomez]

Ok, solved it. Here's some info in case someone runs into the same issue:

When calling the pull function above, it is important to make sure you are handling the rejection error even if you don't do anything with it (more info). So I changed the call and made it:

pull({Image: 'gcr.io/.../.../'}).then(/*...*/).catch(function(e){});

it actually looks like this in my code where I'm chaining a number of promises:

pull(service).then(create).then(start).catch(function(e){});

which simply catches the error and ignores it. I'm adding better error handling as I type this but this should solve this issue here.

Thank you and sorry for the noise.

[softprops]

@lgomez I realize I'm 3 years to late but I just hit this problem and wasted a better part of a day debugging it. your solution worked wonders!