I know the difference between ENTRYPOINT and CMD but cannot solve myself my issue.
This is my Dockerfile for use ansible without install it.
FROM python:3.10.4-slim-buster
# Update and upgrade
RUN apt-get update -y && apt-get upgrade -y
# Install requirements
RUN DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends openssh-client sshpass
RUN pip install pip --upgrade
COPY requirements.txt .
RUN pip install -r requirements.txt
COPY entrypoint.sh /entrypoint.sh
RUN chmod a+x /entrypoint.sh
ENTRYPOINT ["/entrypoint.sh"]
CMD ["--version"]
And this is the entrypoint.sh
#!/usr/bin/env sh
set -e
cp -pr /ssh /root/.ssh
chown -R root:root /root/.ssh/config
ansible-playbook
So, I'm expecting that launching my Docker with
docker run \
--rm -it \
-v $(TOPDIR)/playbook:/playbook:ro \
-v ~/.ssh:/ssh:ro \
sineverba/ansible:latest
(so, without arguments or CMDs) I get the version of ansible in console. But nothing is returned or printed.
Neither if I add the right usage, that I thought it overwrites the CMD instruction
docker run \
--rm -it \
-v $(TOPDIR)/playbook:/playbook:ro \
-v ~/.ssh:/ssh:ro \
--name $(CONTAINER_NAME) \
$(IMAGE_NAME):$(VERSION) \
-i /playbook/inventory.yml /playbook/playbook.yml
But, If I remove the entrypoint and re-build with
FROM python:3.10.4-slim-buster
# Update and upgrade
RUN apt-get update -y && apt-get upgrade -y
# Install requirements
RUN DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends openssh-client sshpass
RUN pip install pip --upgrade
COPY requirements.txt .
RUN pip install -r requirements.txt
COPY entrypoint.sh /entrypoint.sh
RUN chmod a+x /entrypoint.sh
ENTRYPOINT ["ansible-playbook"]
CMD ["--version"]
I get version in console / I can use ansible (well, no, 'because I need to change owner of SSH keys) but, apart of ssh trouble, I get my working docker.
So, how can I replace the entrypoint ansible-playbook with the sh entrypoint?
Your script doesn't do anything with any parameters it might get. You need to add the parameters to the ansible-playbook command in the script, like this
#!/usr/bin/env sh
set -e
cp -pr /ssh /root/.ssh
chown -R root:root /root/.ssh/config
ansible-playbook $#
Related
I have a docker file in which I do wget to copy something in the image. But the build is failing giving 'wget command not found'. WHen i googled I found suggestions to install wget like below
RUN apt update && apt upgrade
RUN apt install wget
Docker File:
FROM openjdk:17
LABEL maintainer="app"
ARG uname
ARG pwd
RUN useradd -ms /bin/bash -u 1000 user1
COPY . /app
WORKDIR /app
RUN ./gradlew build -PmavenUsername=$uname -PmavenPassword=$pwd
ARG YOURKIT_VERSION=2021.11
ARG POLARIS_YK_DIR=YourKit-JavaProfiler-2019.8
RUN wget https://www.yourkit.com/download/docker/YourKit-JavaProfiler-${YOURKIT_VERSION}-docker.zip --no-check-certificate -P /tmp/ && \
unzip /tmp/YourKit-JavaProfiler-${YOURKIT_VERSION}-docker.zip -d /usr/local && \
mv /usr/local/YourKit-JavaProfiler-${YOURKIT_VERSION} /usr/local/$POLARIS_YK_DIR && \
rm /tmp/YourKit-JavaProfiler-${YOURKIT_VERSION}-docker.zip
EXPOSE 10001
EXPOSE 8080
EXPOSE 5005
USER 1000
ENTRYPOINT ["sh", "/docker_entrypoint.sh"]
On doing this I am getting error app-get not found. Can some one suggest any solution.
The openjdk image you use is based on Oracle Linux which uses microdnf rather than apt as it's package manager.
To install wget (and unzip which you also need), you can add this to your Dockerfile:
RUN microdnf update \
&& microdnf install --nodocs wget unzip \
&& microdnf clean all \
&& rm -rf /var/cache/yum
The commands clean up the package cache after installing, to keep the image size as small as possible.
I am using a Dockerfile to install a tool. I am running docker build -f Dockerfile -t ubuntu:mytool . command to initiate the build. The line RUN ./toolPackageInstaller expects two user inputs (1) install path selection and (2) an integer for timezone info halfway through the installation. How do I hardcode this info in a dockerfile or run docker build in interactive mode so the user can input these values during the install process?
FROM ubuntu:bionic
WORKDIR /tmp
RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
build-essential \
sudo \
git \
make
COPY ToolPackage.tar.xz /tmp
RUN tar xvfJp /tmp/ToolPackage.tar.xz
WORKDIR /tmp/ToolPackage
RUN chmod +x toolPackageInstaller
RUN ./toolPackageInstaller
Use build arguments for those desired arguments:
FROM ubuntu:bionic
ARG ARGUMENT_1=<HARDCODED_VALUE>
ARG ARGUMENT_2=<HARDCODED_VALUE>
WORKDIR /tmp
RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
build-essential \
sudo \
git \
make
COPY ToolPackage.tar.xz /tmp
RUN tar xvfJp /tmp/ToolPackage.tar.xz
WORKDIR /tmp/ToolPackage
RUN chmod +x toolPackageInstaller
RUN ./toolPackageInstaller $ARGUMENT_1 $ARGUMENT_2
And configure the script on toolPackageInstaller to use those values as input (referring to them with $1 and $2)
By default it will run with the hardcoded value, and also you can override it if you desire:
docker build --build-arg ARGUMENT_1=<NEW_VALUE> --build-arg ARGUMENT_2=<ANOTHER_NEW_VALUE> -t ubuntu:mytool .
I'm trying to build a docker container containing Sqlite3 and Flask. But Sqlite isn't getting installed because sudo needs a password. How is this problem solved?
The error:
Step 6/19 : RUN sudo apt-get install -y sqlite3
---> Running in 9a9c8f8104a8
sudo: a terminal is required to read the password; either use the -S option to read from standard input or configure an askpass helper
The command '/bin/sh -c sudo apt-get install -y sqlite3' returned a non-zero code: 1
The Dockerfile:
FROM ubuntu:latest
RUN apt-get -y update && apt-get -y install sudo
RUN useradd -m docker && echo "docker:docker" | chpasswd && adduser docker sudo
USER docker
CMD /bin/bash
RUN sudo apt-get install -y sqlite3
RUN mkdir /db
RUN /usr/bin/sqlite3 /db/test.db
CMD /bin/bash
RUN sudo apt-get install -y python
WORKDIR /usr/src/app
ENV FLASK_APP=__init__.py
ENV FLASK_DEBUG=1
ENV FLASK_RUN_HOST=0.0.0.0
ENV FLASK_ENV=development
COPY requirements.txt requirements.txt
RUN pip install -r requirements.txt
COPY . .
CMD ["flask", "run"]
sudo is not necessary as you can install everything before switching users.
You should think of consistent layers.
Each version of your image should replace only delta parts.
https://docs.docker.com/develop/develop-images/dockerfile_best-practices/
Please find below an example of what you could use instead of the provided dockerfile.
The idea is that you install dependencies and then run some configuration commands.
Be aware that CMD can be replaced at runtime.
docker run myimage <CMD>
# Base image, based on python installed on debian
FROM python:3.9-slim-bullseye
# Arguments used to run the app
ARG user=docker
ARG group=docker
ARG uid=1000
ARG gid=1000
ARG app_home=/usr/src/app
ARG sql_database_directory=/db
ARG sql_database_name=test.db
# Environment variables, user defined
ENV FLASK_APP=__init__.py
ENV FLASK_DEBUG=1
ENV FLASK_RUN_HOST=0.0.0.0
ENV FLASK_ENV=development
# Install sqlite
RUN apt-get update \
&& apt-get install -y sqlite3 \
&& apt-get clean
# Create app user
RUN mkdir -p ${app_home} \
&& chown ${uid}:${gid} ${app_home} \
&& groupadd -g ${gid} ${group} \
&& useradd -d "${app_home}" -u ${uid} -g ${gid} -s /bin/bash ${user}
# Create sql database directory
RUN mkdir -p ${sql_database_directory} \
&& chown ${uid}:${gid} ${sql_database_directory}
# Switch to user defined by arguments
USER ${user}
RUN /usr/bin/sqlite3 ${sql_database_directory}/${sql_database_name}
# Copy & Run application (by default)
WORKDIR ${app_home}
COPY . .
RUN pip install --no-cache-dir --no-warn-script-location -r requirements.txt
CMD ["python", "-m", "flask", "run"]
I have the following Dockerfile, currently working locally in my device:
FROM python:3.7-slim-buster
WORKDIR /app
COPY . /app
VOLUME /app
RUN chmod +x /app/cat/sitemap_download.py
COPY entrypoint.sh /app/entrypoint.sh
RUN chmod +x /app/entrypoint.sh
ARG VERSION=3.7.4
RUN apt update && \
apt install -y bash wget && \
wget -O /tmp/nordrepo.deb https://repo.nordvpn.com/deb/nordvpn/debian/pool/main/nordvpn-release_1.0.0_all.deb && \
apt install -y /tmp/nordrepo.deb && \
apt update && \
apt install -y nordvpn=$VERSION && \
apt remove -y wget nordvpn-release
RUN apt-get clean \
&& apt-get -y update
RUN apt-get -y install python3-dev \
python3-psycopg2 \
&& apt-get -y install build-essential
RUN pip install --upgrade pip
RUN pip install -r cat/requirements.txt
RUN pip install awscli
ENTRYPOINT ["sh", "-c", "./entrypoint.sh"]
But when I deploy it to Fargate, the container stops before reaching the steady state with:
sh: 1: ./entrypoint.sh: not found
Edit: Adding entrypoint.sh file for clarification:
#!/bin/env sh
# start process, but it should exit once the file is in S3
/app/cat/sitemap_download.py
# Once the process is done, we are good to scale down the service
aws ecs update-service --cluster cluster_name --region eu-west-1 --service service-name --desired-count 0
I have tried modifying ENTRYPOINT to use it as exec form, or with full path but always get the same issue. Any ideas on what am I doing wrong?
I've managed to fix it now.
Changing the Dockerfile to look as follows solves the issue:
COPY . /app
VOLUME /app
RUN chmod +x /app/cat/sitemap_download.py
COPY entrypoint.sh /app/entrypoint.sh
RUN chmod +x /app/entrypoint.sh
ARG VERSION=3.7.4
RUN apt update && \
apt install -y bash wget && \
wget -O /tmp/nordrepo.deb https://repo.nordvpn.com/deb/nordvpn/debian/pool/main/nordvpn-release_1.0.0_all.deb && \
apt install -y /tmp/nordrepo.deb && \
apt update && \
apt install -y nordvpn=$VERSION && \
apt remove -y wget nordvpn-release
RUN apt-get clean \
&& apt-get -y update
RUN apt-get -y install python3-dev \
python3-psycopg2 \
&& apt-get -y install build-essential
RUN pip install --upgrade pip
RUN pip install -r cat/requirements.txt
RUN pip install awscli
ENTRYPOINT ["/bin/bash"]
CMD ["./entrypoint.sh"]
I tried this after reading: What is the difference between CMD and ENTRYPOINT in a Dockerfile?
I believe this syntax fixes it because with entrypoint I'm indicating bash to be run at start, and then passing the script as parameter.
I have this file Dockerfile.nlu
FROM chatbot/spacy:latest
WORKDIR /app
COPY nlu ./agent_nlu
RUN python –m rasa_nlu.train --config agent_nlu/config.yml --data agent_nlu/data/ --path agent_nlu/agent --fixed_model_name default
and I get the error below:
]$ sudo docker build -t nlu:latest -f docker/Dockerfile.nlu .
Sending build context to Docker daemon 9.216kB
Step 1/4 : FROM chatbot/spacy:latest
---> 496dc6a38abb
Step 2/4 : WORKDIR /app
---> Using cache
---> 7f02012c8452
Step 3/4 : COPY nlu ./agent_nlu
COPY failed: stat /var/lib/docker/tmp/docker-builder363868051/nlu: no such file or directory
It doesn't look like Docker can find the nlu directory. Are you sure it exists? Are you sure that you are executing the command from the correct directory?
But you also aren't installing Rasa at all or any of it's requirements. Is there a reason you aren't using the pre-built Rasa images? available here with docs here.
Here is a fully functional Docker file pulled from their repo.
FROM python:3.6-slim
ENV RASA_NLU_DOCKER="YES" \
RASA_NLU_HOME=/app \
RASA_NLU_PYTHON_PACKAGES=/usr/local/lib/python3.6/dist-packages
# Run updates, install basics and cleanup
# - build-essential: Compile specific dependencies
# - git-core: Checkout git repos
RUN apt-get update -qq \
&& apt-get install -y --no-install-recommends build-essential git-core openssl libssl-dev libffi6 libffi-dev curl \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
WORKDIR ${RASA_NLU_HOME}
COPY . ${RASA_NLU_HOME}
# use bash always
RUN rm /bin/sh && ln -s /bin/bash /bin/sh
RUN pip install -r alt_requirements/requirements_spacy_sklearn.txt
RUN pip install -e .
RUN pip install https://github.com/explosion/spacy-models/releases/download/en_core_web_md-2.0.0/en_core_web_md-2.0.0.tar.gz --no-cache-dir > /dev/null \
&& python -m spacy link en_core_web_md en \
&& pip install https://github.com/explosion/spacy-models/releases/download/de_core_news_sm-2.0.0/de_core_news_sm-2.0.0.tar.gz --no-cache-dir > /dev/null \
&& python -m spacy link de_core_news_sm de
COPY sample_configs/config_spacy.yml ${RASA_NLU_HOME}/config.yml
VOLUME ["/app/projects", "/app/logs", "/app/data"]
EXPOSE 5000
ENTRYPOINT ["./entrypoint.sh"]
CMD ["start", "-c", "config.yml", "--path", "/app/projects"]