Unable to start airflow webserver in the background in docker container.

Apache Airflow version: 2.1.2

Environment: continuumio/anaconda3 docker image

• OS (e.g. from /etc/os-release): Debian 10 Buster
• Kernel: Linux 242e786962c8 4.19.76-linuxkit #1 SMP Thu Oct 17 19:31:58 UTC 2019 x86_64 GNU/Linux
• Install tools: Docker
• Others: Host OS is windows 10

What happened:

I have installed airflow inside the docker container. And to run the webserver, I used the command

airflow webserver -D

to run in the background, however, the application is still running in the foreground and I have to open another terminal to run the airflow scheduler. The same issue is faced when trying to run the airflow scheduler in the background.

What you expected to happen: To start the airflow web server in the background.

How to reproduce it:

1. Use the Dockerfile attached to run the image.
2. Start a terminal in the container.
3. Run airflow webserver -D

The Dockerfile:

FROM continuumio/anaconda3

WORKDIR /airflow

ENV AIRFLOW_HOME /airflow
ENV AIRFLOW_VERSION 2.1.2
ENV PYTHON_VERSION 3.8
ENV CONSTRAINT_URL "https://raw.githubusercontent.com/apache/airflow/constraints-${AIRFLOW_VERSION}/constraints-${PYTHON_VERSION}.txt"

RUN apt-get update -y
RUN apt-get install -y --no-install-recommends \
        freetds-bin \
        ldap-utils \
        libffi-dev \
        libsasl2-2 \
        libsasl2-modules \
        libssl1.1 \
        locales  \
        lsb-release \
        sasl2-bin \
        sqlite3 \
        unixodbc
RUN pip install "apache-airflow==${AIRFLOW_VERSION}" --constraint "${CONSTRAINT_URL}"
RUN airflow db init
RUN airflow users create \
	    --username admin \
	    --firstname admin \
	    --lastname admin \
	    --password admin \
	    --role Admin \
	    --email [e-mail]

[potiuk]

All works perfectly for me

[potiuk]

docker run -it apache/airflow:latest bash

airflow@1abe97747ca7:/opt/airflow$ airflow webserver -D
[2021-07-23 10:11:16,569] {cli_action_loggers.py:105} WARNING - Failed to log action with (sqlite3.OperationalError) no such table: log
[SQL: INSERT INTO log (dttm, dag_id, task_id, event, execution_date, owner, extra) VALUES (?, ?, ?, ?, ?, ?, ?)]
[parameters: ('2021-07-23 10:11:16.565715', None, None, 'cli_webserver', None, 'airflow', '{"host_name": "1abe97747ca7", "full_command": "[\'/home/airflow/.local/bin/airflow\', \'webserver\', \'-D\']"}')]
(Background on this error at: http://sqlalche.me/e/13/e3q8)
  ____________       _____________
 ____    |__( )_________  __/__  /________      __
____  /| |_  /__  ___/_  /_ __  /_  __ \_ | /| / /
___  ___ |  / _  /   _  __/ _  / / /_/ /_ |/ |/ /
 _/_/  |_/_/  /_/    /_/    /_/  \____/____/|__/
[2021-07-23 10:11:16,590] {dagbag.py:496} INFO - Filling up the DagBag from /dev/null
[2021-07-23 10:11:16,690] {manager.py:784} WARNING - No user yet created, use flask fab command to do it.
Running the Gunicorn Server with:
Workers: 4 sync
Host: 0.0.0.0:8080
Timeout: 120
Logfiles: - -
Access Logformat: 
=================================================================            
airflow@1abe97747ca7:/opt/airflow$