Quick & Dirty: Docker Anaconda Flask Hello World

Submitted by Xilodyne on Thu, 01/11/2024 - 15:26

Dockerfile "Hello World" (using Anaconda & Flask)

Using docker build to run a Flask application as described in the Docker Build documentation, https://docs.docker.com/build .

This example uses the Anaconda (Miniconda) Python environment, https://repo.anaconda.com/miniconda/Miniconda3-py310_23.11.0-2-Linux-x86_64.sh

`Directory structure`
`~/hello_world - flask_conda.buildfile /src - hello.py - Miniconda3-py310_23.11.0-2-Linux-x86_64.sh /scripts - docker_build.sh - docker_run.sh`

`wget <link>`
`$ wget https://repo.anaconda.com/miniconda/Miniconda3-py310_23.11.0-2-Linux-x86_64.sh`

`hello.py`
`$ cat src/hello.py from flask import Flask app = Flask(__name__) @app.route("/") def hello(): return "Hello World!\n"`

`docker_build.sh`
`$ cat scripts/docker_build.sh docker build --progress=plain --no-cache -f ../flask_conda.buildfile -t flask_test:final_v1 ../`

`flask_conda.buildfile`
$ cat flask_conda.buildfile # https://docs.docker.com/build/building/packaging/ # syntax=docker/dockerfile:1 FROM ubuntu:22.04 SHELL ["/bin/bash", "-c"] ENV PATH="${PATH}:/root/miniconda3/bin" COPY src/hello.py / COPY src/Miniconda3-py310_23.11.0-2-Linux-x86_64.sh / RUN chmod 755 Miniconda3-py310_23.11.0-2-Linux-x86_64.sh ; \ /Miniconda3-py310_23.11.0-2-Linux-x86_64.sh -b # "conda activate" does not work in non-interactive session; use "conda run" RUN conda create --yes --name dock_flask python==3.10; \ conda init bash; \ conda run -n dock_flask; \ conda install -y anaconda::flask # final configuration ENV FLASK_APP=hello EXPOSE 8000 CMD flask run --host 0.0.0.0 --port 8000

Run `docker build results`
`scripts$ ./docker_build.sh #0 building with "default" instance using docker driver` `#1 [internal] load .dockerignore #1 transferring context: 2B done #1 DONE 0.0s` `#2 [internal] load build definition from flask_conda.buildfile #2 transferring dockerfile: 757B done #2 DONE 0.0s` `#3 [internal] load metadata for docker.io/library/ubuntu:22.04 #3 DONE 0.0s` `#4 [1/5] FROM docker.io/library/ubuntu:22.04 #4 CACHED` `#5 [internal] load build context #5 transferring context: 238B 0.0s done #5 DONE 0.0s` `#6 [2/5] COPY src/hello.py / #6 DONE 0.1s` `#7 [3/5] COPY src/Miniconda3-py310_23.11.0-2-Linux-x86_64.sh / #7 DONE 1.2s` `#8 [4/5] RUN chmod 755 Miniconda3-py310_23.11.0-2-Linux-x86_64.sh ; /Miniconda3-py310_23.11.0-2-Linux-x86_64.sh -b #8 1.152 PREFIX=/root/miniconda3 #8 2.414 Unpacking payload ...` `#8 16.86 Installing base environment... #8 16.86 #8 20.26 #8 20.26 Downloading and Extracting Packages: ...working... done #8 20.26 #8 20.26 Downloading and Extracting Packages: ...working... done #8 20.26 Preparing transaction: ...working... done #8 22.66 Executing transaction: ...working... done #8 34.91 installation finished. #8 DONE 35.4s` #9 [5/5] RUN conda create --yes --name dock_flask python==3.10; conda init bash; conda run -n dock_flask; conda install -y anaconda::flask #9 2.912 Channels: #9 2.912 - defaults #9 2.912 Platform: linux-64 #9 2.912 Collecting package metadata (repodata.json): ...working... done #9 23.57 Solving environment: ...working... done #9 39.57 #9 39.57 ## Package Plan ## #9 39.57 #9 39.57 environment location: /root/miniconda3/envs/dock_flask #9 39.57 #9 39.57 added / updated specs: #9 39.57 - python==3.10 #9 39.57 #9 39.57 #9 39.57 The following packages will be downloaded: #9 39.57 #9 39.57 package \| build #9 39.57 ---------------------------\|----------------- #9 39.57 libffi-3.3 \| he6710b0_2 50 KB #9 39.57 openssl-1.1.1w \| h7f8727e_0 3.7 MB #9 39.57 python-3.10.0 \| h12debd9_5 23.5 MB #9 39.57 tzdata-2023d \| h04d1e81_0 117 KB #9 39.57 ------------------------------------------------------------ #9 39.57 Total: 27.4 MB #9 39.57 #9 39.57 The following NEW packages will be INSTALLED: #9 39.57 #9 39.57 _libgcc_mutex pkgs/main/linux-64::_libgcc_mutex-0.1-main #9 39.57 _openmp_mutex pkgs/main/linux-64::_openmp_mutex-5.1-1_gnu #9 39.57 bzip2 pkgs/main/linux-64::bzip2-1.0.8-h7b6447c_0 #9 39.57 ca-certificates pkgs/main/linux-64::ca-certificates-2023.12.12-h06a4308_0 #9 39.57 ld_impl_linux-64 pkgs/main/linux-64::ld_impl_linux-64-2.38-h1181459_1 #9 39.57 libffi pkgs/main/linux-64::libffi-3.3-he6710b0_2 #9 39.57 libgcc-ng pkgs/main/linux-64::libgcc-ng-11.2.0-h1234567_1 #9 39.57 libgomp pkgs/main/linux-64::libgomp-11.2.0-h1234567_1 #9 39.57 libstdcxx-ng pkgs/main/linux-64::libstdcxx-ng-11.2.0-h1234567_1 #9 39.57 libuuid pkgs/main/linux-64::libuuid-1.41.5-h5eee18b_0 #9 39.57 ncurses pkgs/main/linux-64::ncurses-6.4-h6a678d5_0 #9 39.57 openssl pkgs/main/linux-64::openssl-1.1.1w-h7f8727e_0 #9 39.57 pip pkgs/main/linux-64::pip-23.3.1-py310h06a4308_0 #9 39.57 python pkgs/main/linux-64::python-3.10.0-h12debd9_5 #9 39.57 readline pkgs/main/linux-64::readline-8.2-h5eee18b_0 #9 39.57 setuptools pkgs/main/linux-64::setuptools-68.2.2-py310h06a4308_0 #9 39.57 sqlite pkgs/main/linux-64::sqlite-3.41.2-h5eee18b_0 #9 39.57 tk pkgs/main/linux-64::tk-8.6.12-h1ccaba5_0 #9 39.57 tzdata pkgs/main/noarch::tzdata-2023d-h04d1e81_0 #9 39.57 wheel pkgs/main/linux-64::wheel-0.41.2-py310h06a4308_0 #9 39.57 xz pkgs/main/linux-64::xz-5.4.5-h5eee18b_0 #9 39.57 zlib pkgs/main/linux-64::zlib-1.2.13-h5eee18b_0 #9 39.57 #9 39.57 #9 39.57 #9 39.57 Downloading and Extracting Packages: ...working... done #9 39.57 Preparing transaction: ...working... done #9 41.24 Verifying transaction: ...working... done #9 47.50 Executing transaction: ...working... done #9 69.99 # #9 69.99 # To activate this environment, use #9 69.99 # #9 69.99 # $ conda activate dock_flask #9 69.99 # #9 69.99 # To deactivate an active environment, use #9 69.99 # #9 69.99 # $ conda deactivate #9 69.99 #9 71.41 no change /root/miniconda3/condabin/conda #9 71.41 no change /root/miniconda3/bin/conda #9 71.41 no change /root/miniconda3/bin/conda-env #9 71.41 no change /root/miniconda3/bin/activate #9 71.41 no change /root/miniconda3/bin/deactivate #9 71.41 no change /root/miniconda3/etc/profile.d/conda.sh #9 71.41 no change /root/miniconda3/etc/fish/conf.d/conda.fish #9 71.41 no change /root/miniconda3/shell/condabin/Conda.psm1 #9 71.41 no change /root/miniconda3/shell/condabin/conda-hook.ps1 #9 71.41 no change /root/miniconda3/lib/python3.10/site-packages/xontrib/conda.xsh #9 71.41 no change /root/miniconda3/etc/profile.d/conda.csh #9 71.41 modified /root/.bashrc #9 71.41 #9 71.41 ==> For changes to take effect, close and re-open your current shell. <== #9 71.41 #9 77.06 Channels: #9 77.06 - defaults #9 77.06 - anaconda #9 77.06 Platform: linux-64 #9 77.06 Collecting package metadata (repodata.json): ...working... done #9 89.58 Solving environment: ...working... done #9 92.95 #9 92.95 ## Package Plan ## #9 92.95 #9 92.95 environment location: /root/miniconda3 #9 92.95 #9 92.95 added / updated specs: #9 92.95 - anaconda::flask #9 92.95 #9 92.95 #9 92.95 The following packages will be downloaded: #9 92.95 #9 92.95 package \| build #9 92.95 ---------------------------\|----------------- #9 92.95 click-8.1.7 \| py310h06a4308_0 166 KB #9 92.95 flask-2.2.2 \| py310h06a4308_0 137 KB anaconda #9 92.95 itsdangerous-2.0.1 \| pyhd3eb1b0_0 18 KB #9 92.95 jinja2-3.1.2 \| py310h06a4308_0 215 KB #9 92.95 markupsafe-2.1.3 \| py310h5eee18b_0 22 KB #9 92.95 werkzeug-2.2.3 \| py310h06a4308_0 346 KB #9 92.95 ------------------------------------------------------------ #9 92.95 Total: 903 KB #9 92.95 #9 92.95 The following NEW packages will be INSTALLED: #9 92.95 #9 92.95 click pkgs/main/linux-64::click-8.1.7-py310h06a4308_0 #9 92.95 flask anaconda/linux-64::flask-2.2.2-py310h06a4308_0 #9 92.95 itsdangerous pkgs/main/noarch::itsdangerous-2.0.1-pyhd3eb1b0_0 #9 92.95 jinja2 pkgs/main/linux-64::jinja2-3.1.2-py310h06a4308_0 #9 92.95 markupsafe pkgs/main/linux-64::markupsafe-2.1.3-py310h5eee18b_0 #9 92.95 werkzeug pkgs/main/linux-64::werkzeug-2.2.3-py310h06a4308_0 #9 92.95 #9 92.95 #9 92.95 #9 92.95 Downloading and Extracting Packages: ...working... done #9 92.95 Preparing transaction: ...working... done #9 93.08 Verifying transaction: ...working... done #9 93.22 Executing transaction: ...working... done #9 DONE 95.4s `#10 exporting to image #10 exporting layers #10 exporting layers 43.0s done #10 writing image sha256:60e0c977c2e803ccbd8042c07d0a330c1543b8a87fb708d606f3e73f4e4f481a done #10 naming to docker.io/library/flask_test:final_v1 0.0s done #10 DONE 43.0s`

`docker_run_flask.sh`
`cat scripts/docker_run_flask.sh docker run -p 127.0.0.1:8000:8000 flask_test:final_v1`

`run flask`
`script$ ./docker_run_flask.sh * Serving Flask app 'hello' * Debug mode: off WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead. * Running on all addresses (0.0.0.0) * Running on http://127.0.0.1:8000 * Running on http://172.17.0.3:8000 Press CTRL+C to quit`

`docker ps`
`$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 03de9a5bc5e4 flask_test:final_v1 "/bin/bash -c 'flask…" 3 minutes ago Up 3 minutes 127.0.0.1:8000->8000/tcp strange_ellis`

`Flask Results`
`$ curl http://127.0.0.1:8000 Hello World!`

Tags