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i got these errors and warnings after step 6 of sudo docker-compose up

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/asn1crypto/

WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/asn1crypto/

WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/asn1crypto/

‌ WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/asn1crypto/

WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError(': Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/asn1crypto/

ERROR: Could not find a version that satisfies the requirement asn1crypto==0.24.0 (from -r requirements.txt (line 1)) (from versions: none)

ERROR: No matching distribution found for asn1crypto==0.24.0 (from -r requirements.txt (line 1))

this is my Dockerfile codes: 

FROM python:3
ENV PYTHONUNBUFFERED 1
RUN mkdir /todo_service
WORKDIR /todo_service
COPY /requirements.txt /todo_service
RUN pip install -r requirements.txt
COPY . /todo_service/

what should i do to up it without any warning and err?

developeroka
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    It seems to be a connection issue. Read out here https://development.robinwinslow.uk/2016/06/23/fix-docker-networking-dns/ – mad_ May 20 '19 at 20:42
  • check this: https://stackoverflow.com/questions/44761246/temporary-failure-in-name-resolution-errno-3-with-docker – Gertjan Brouwer May 20 '19 at 22:04

1 Answers1

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Docker container seems to have a problem connecting or resolving the URLs. Go to /etc/default/docker (In Ubuntu Desktop package installed docker) and uncomment the following line.

DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4"
Erkan Şirin
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