Does anyone have the docker-registry working with authentication? I've tried and it works fine without auth (like my old setup with my custom registry solution), but as soon as I enable user management, the images can't be pushed to the target-cloudron. Recap of what I was doing: installed docker and Cloudron cli on a new linux machine installed the docker-registry app on Cloudron X ( docker.example.com ), added a user ("docker") on X and set its credentials in Cloudron Y settings git cloned an app of mine on the linux machine cloudron login (on Cloudron Y) and docker login docker.example.com docker build -t docker.example.com/my-app . docker push docker.example.com/my-app cloudron install --image docker.example.com/my-app -l myapp Up until the last step everything works fine, but the containers can't get pushed/downloaded on Cloudron Y, this is what happens: CLI response: App installation error: Installation failed: Unable to pull image docker.example/my-app. Please check the network or if the image needs authentication. statusCode: 500 App log: Feb 06 22:35:08 box:docker downloadImage docker.example.com/my-app Feb 06 22:35:08 box:docker Downloading image docker.example.com/my-app. attempt: 1 Feb 06 22:35:08 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:15 box:docker Downloading image docker.example.com/my-app. attempt: 2 Feb 06 22:35:15 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:21 box:docker Downloading image docker.example.com/my-app. attempt: 3 Feb 06 22:35:21 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:26 box:docker Downloading image docker.example.com/my-app. attempt: 4 Feb 06 22:35:26 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:31 box:docker Downloading image docker.example.com/my-app. attempt: 5 Feb 06 22:35:31 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:37 box:docker Downloading image docker.example.com/my-app. attempt: 6 Feb 06 22:35:37 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:42 box:docker Downloading image docker.example.com/my-app. attempt: 7 Feb 06 22:35:42 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:47 box:docker Downloading image docker.example.com/my-app. attempt: 8 Feb 06 22:35:47 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:53 box:docker Downloading image docker.example.com/my-app. attempt: 9 Feb 06 22:35:53 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:58 box:docker Downloading image docker.example.com/my-app. attempt: 10 Feb 06 22:35:58 box:docker pullImage: will pull docker.example.com/my-app. auth: yes Feb 06 22:35:58 box:apptask myapp.cloudrony.com error installing app: BoxError: Unable to pull image docker.example.com/my-app. Please check the network or if the image needs authentication. statusCode: 500 Feb 06 22:35:58 box:apptask myapp.cloudrony.com updating app with values: {"installationState":"error","error":{"message":"Unable to pull image docker.example.com/my-app. Please check the network or if the image needs authentication. statusCode: 500","reason":"Docker Error","taskId":"6145","installationState":"pending_install"}} Feb 06 22:35:58 box:taskworker Task took 55.403 seconds Feb 06 22:35:58 box:tasks setCompleted - 6145: {"result":null,"error":{"stack":"BoxError: Unable to pull image docker.example.com/my-app. Please check the network or if the image needs authentication. statusCode: 500\n at /home/yellowtent/box/src/docker.js:141:40\n at /home/yellowtent/box/node_modules/dockerode/lib/docker.js:119:7\n at /home/yellowtent/box/node_modules/docker-modem/lib/modem.js:265:7\n at IncomingMessage.<anonymous> (/home/yellowtent/box/node_modules/docker-modem/lib/modem.js:284:9)\n at IncomingMessage.emit (events.js:203:15)\n at endReadableNT (_stream_readable.js:1145:12)\n at process._tickCallback (internal/process/next_tick.js:63:19)","name":"BoxError","reason":"Docker Error","details":{},"message":"Unable to pull image docker.example.com/my-app. Please check the network or if the image needs authentication. statusCode: 500"}} Feb 06 22:35:58 box:tasks 6145: {"percent":100,"result":null,"error":{"stack":"BoxError: Unable to pull image docker.example.com/my-app. Please check the network or if the image needs authentication. statusCode: 500\n at /home/yellowtent/box/src/docker.js:141:40\n at /home/yellowtent/box/node_modules/dockerode/lib/docker.js:119:7\n at /home/yellowtent/box/node_modules/docker-modem/lib/modem.js:265:7\n at IncomingMessage.<anonymous> (/home/yellowtent/box/node_modules/docker-modem/lib/modem.js:284:9)\n at IncomingMessage.emit (events.js:203:15)\n at endReadableNT (_stream_readable.js:1145:12)\n at process._tickCallback (internal/process/next_tick.js:63:19)","name":"BoxError","reason":"Docker Error","details":{},"message":"Unable to pull image docker.example.com/my-app. Please check the network or if the image needs authentication. statusCode: 500"}} Docker logs: Feb 06 22:35:10 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:10.977369199Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:10 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:10.977424454Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Feb 06 22:35:13 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:13.063771584Z" level=info msg="ignoring event" module=libcontainerd namespace=moby topic=/tasks/delete type="*events.TaskDelete" Feb 06 22:35:16 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:16.277251730Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:16 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:16.277311467Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Feb 06 22:35:21 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:21.573447894Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:21 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:21.573505543Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Feb 06 22:35:26 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:26.857404427Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:26 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:26.857459284Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Feb 06 22:35:32 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:32.156592002Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:32 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:32.156667957Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Feb 06 22:35:37 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:37.455109662Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:37 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:37.455163318Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Feb 06 22:35:41 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:41.812898340Z" level=info msg="ignoring event" module=libcontainerd namespace=moby topic=/tasks/delete type="*events.TaskDelete" Feb 06 22:35:42 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:42.576830368Z" level=info msg="ignoring event" module=libcontainerd namespace=moby topic=/tasks/delete type="*events.TaskDelete" Feb 06 22:35:42 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:42.748936700Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:42 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:42.748989045Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Feb 06 22:35:48 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:48.041591964Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:48 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:48.041658716Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Feb 06 22:35:53 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:53.335916491Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:53 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:53.335978423Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Feb 06 22:35:58 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:58.616154482Z" level=info msg="Attempting next endpoint for pull after error: invalid character '<' looking for beginning of value" Feb 06 22:35:58 my.cloudrony.com dockerd[1433]: time="2021-02-06T21:35:58.616210521Z" level=error msg="Handler for POST /images/create returned error: invalid character '<' looking for beginning of value" Does anyone have this working as a standalone registry (without gitlab)? No idea what to make of the docker logs with the character thing. Cheers, M

@ msbt Found the problem after much debugging. It seems there is some special code that changes the UA string depending on the client. So, the proxyAuth addon does not allow dockerode to authenticate properly. https://git.cloudron.io/cloudron/box/-/commit/1d0ad3cb47f85b05eabb31853c8c3a585d06c2e9 is the fix. It's really just changing docker-client to docker . If you apply the patch, restart the box code and also go to Docker registry app -> Location -> Save to regenerate the nginx config.

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Cannot install apps from docker-registry because authentication fails

Solved Docker Registry

21 Posts 8 Posters 2.6k Views 8 Watching

N nottheend
Few years after the original bug got fixed, I am encountering the same error for my selfhosted private registry:
```
Docker Error - Unable to pull image mydomain.com/myusername/myapp:1.0.0 Please check the network or if the image needs authentication. statusCode 500
```
In the logs are 10 not successful pull attempts visible.

The Docker registry is hosted on the same Cloudron server, it is Docker Registry App from official App Store.

In the settings if my Cloudron instance, I configured a Private Docker Registry with the same Credentials I used to successfully push the Docker build from local. I changed from Docker to Other just to be sure, with the same credentials.
After building the build, I can successfullypush it with the very same credentials to the private Docker Hub.

Is there any way how to come closer to the probable authentication error?
N Offline
N Offline
nottheend

wrote on last edited by

#21

@nottheend have created a new topic since it is most likely not this bug:
https://forum.cloudron.io/topic/12216/docker-error-unable-to-pull-image-on-same-instance
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Cannot install apps from docker-registry because authentication fails