here is my Dockerfile tried to build:
FROM ubuntu:latest
# install flask server
RUN apt-get update -y
RUN apt-get install -y python-pip python-dev build-essential
COPY app.py /
RUN pip install flask
# install ruby
RUN \
apt-get install -y ruby ruby-dev ruby-bundler && \
rm -rf /var/lib/apt/lists/*
# install lua
RUN apt-get update -y && apt-get install -y luajit luarocks
# Define default command.
CMD [“python”, “app.py”]
However, it shown up with error
/bin/sh: 1: [“python”,: not found
I have no idea why this happened. Could someone please help me with it?
Make sure to use the right CMD syntax with "", not “”:
CMD ["executable","param1","param2"] (exec form, this is the preferred form)
Related
I have a python code which runs fine to pull data from an API but I am getting issues to run it via docker. I am using pyodbc to load data into SQLServer in my python code. Here is my dockerfile:
FROM python:3.9.2
RUN apt-get update -y && apt-get install -y --no-install-recommends \
unixodbc-dev \
unixodbc \
libpq-dev
WORKDIR /app
COPY requirements.txt requirements.txt
RUN pip3 install -r requirements.txt
COPY . .
CMD ["python3","LoadAPI_data.py"]
After creating the docker image, when I am trying to run the docker image, I get the following error:
Error !!!!: ('01000', "[01000] [unixODBC][Driver Manager]Can't open
lib 'ODBC Driver 17 for SQL Server' : file not found (0)
(SQLDriverConnect)")
Can anyone let me know how do I get rid of this error?
I was able to get my code running by updating my dockerfile to run installation of SQL DB as well as python. Here is what my new dockerfile looks like.
FROM ubuntu:18.04
RUN apt-get update -y && \
apt-get install -y \
libpq-dev \
gcc \
python3-pip \
unixodbc-dev
RUN apt-get update && apt-get install -y \
curl apt-utils apt-transport-https debconf-utils gcc build-essential g++-5\
&& rm -rf /var/lib/apt/lists/*
RUN curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -
RUN curl https://packages.microsoft.com/config/ubuntu/18.04/prod.list > /etc/apt/sources.list.d/mssql-release.list
RUN apt-get update
RUN ACCEPT_EULA=Y apt-get install -y --allow-unauthenticated msodbcsql17
RUN pip3 install pyodbc
WORKDIR /app
COPY requirements.txt requirements.txt
RUN pip3 install -r requirements.txt
COPY . .
CMD ["python3","LoadAPI_data.py"]
Following is my Dockerfile :-
FROM ubuntu:18.04 AS builder
RUN apt update -y
RUN apt install python3.8 -y && apt install python3-pip -y
RUN apt install build-essential automake pkg-config libtool libffi-dev libgmp-dev -y
RUN apt install libsecp256k1-dev -y
RUN apt install openjdk-8-jre -y
RUN apt install git -y
RUN apt install libkrb5-dev -y
RUN apt install vim -y
RUN mkdir /opt/app
RUN chown -R root:root /opt/app
COPY ["requirements.txt","/opt/app/requirements.txt"]
SHELL ["/bin/bash", "-c"]
WORKDIR /opt/app
RUN pip3 install -r requirements.txt && apt-get -y clean all
RUN mkdir /opt/app/
RUN chown -R root:root /opt/app/
RUN cd /opt/app/
RUN git clone -b master https://bitbucket.org/heroes/test.git
CMD ["bash","/opt/app/bin/connect.sh"]
Docker image is generating with an image file size of 1.7G. I need to have OpenJDK hence cannot use a standard python package as a base package. When I perform docker history , I can see 2 or 3 layers (installing packages above like Python3.8, OpenJDK and libsecp256k1-dev) taking up to 400MB to 500MB in size. Ubuntu as a base image takes only 64 MB however rest of size is taking by my dockerfile layers.
I believe I need to re-write the dockerfile in order to reduce the file size which I did but nothing happened concrete.
Please assist me on reducing the image less than 1 GB at least.
[Update]
Below is my updated Dockerfile:-
FROM ubuntu:18.04 AS builder
WORKDIR /opt/app
COPY requirements.txt /opt/app/aws/requirements.txt
RUN mkdir -p /opt/app/aws \
&& apt-get update -yq \
&& apt-get install -y python3.8 python3-pip openjdk-8-jre -yq && apt-get -y clean all \
&& chown -R root:root /opt/app && cd /opt/app/aws && pip3 install -r requirements.txt
FROM alpine
COPY --from=builder /opt/app /opt/app
SHELL ["/bin/bash", "-c"]
CMD ["bash","/opt/app/aws/bin/connector/connect.sh"]
Screenshot of image size:-
After removing unwanted libraries like git, etc and using the multi-stage build, the image is now approx 1.7 GB which I believe is a lot. Any suggestion to improve this?
You have multiple issues going on.
First, each of your RUN apt install is increasing your image size, you should have them all in the same RUN stage, and at the end of the stage, delete all cached apt files.
Second, you're installing unnecessary stuff. Why would you need vim and git for instance? Why are you installing build-essential and other build-related stuff if you're not building anything?
Third, it seems you tried to do a multi-stage build but ended up adding everything to the same image. Read up on python multi-stage builds.
If we consider best practices instead of multiple RUN use single RUN.
For example
RUN apt-get update -yq \
&& apt-get install -y python3-dev build-essential -yq \
&& apt-get install curl -yq \
&& pip install -r requirements.txt \
&& apt-get purge -y --auto-remove gcc python3-dev build-essential
you can use multistage builds if you don't require git in your final image you can remove in final stage
Also if possible you can use alpine version also.
Try disabling recommended packages of APT with --no-install-recommends, you can read more about it from here.
Now the image is smaller:
FROM ubuntu:18.04 AS builder
RUN apt update -y
RUN apt install python3-pip -y
RUN apt install build-essential automake pkg-config libtool libffi-dev libgmp-dev -y
RUN apt install libsecp256k1-dev -y
RUN apt install openjdk-8-jre-headless -y
RUN apt install git -y
RUN apt install libkrb5-dev -y
RUN apt install vim -y
RUN mkdir /opt/app
RUN chown -R root:root /opt/app
COPY ["requirements.txt","/opt/app/requirements.txt"]
SHELL ["/bin/bash", "-c"]
WORKDIR /opt/app
RUN pip3 install -r requirements.txt && apt-get -y clean all
RUN mkdir /opt/app/
RUN chown -R root:root /opt/app/
RUN cd /opt/app/
RUN git clone -b master https://bitbucket.org/heroes/test.git
CMD ["bash","/opt/app/bin/connect.sh"]
This is my Dockerfile:
FROM debian:latest
LABEL MAINTAINER DINESH
LABEL version="1.0"
LABEL description="First image with Dockerfile & DINESH."
RUN apt-get clean
RUN apt-get update
RUN apt-get install -qy git
RUN apt-get install -qy locales
RUN apt-get install -qy nano
RUN apt-get install -qy tmux
RUN apt-get install -qy wget
RUN apt-get install -qy python3
RUN apt-get install -qy python3-psycopg2
RUN apt-get install -qy python3-pystache
RUN apt-get install -qy python3-yaml
RUN apt-get -qy autoremove
# ** ERROR IS BELOW **
ADD .bashrc /root/.bashrc
ADD .profile /root/.profile
ADD app /app
RUN locale-gen C.UTF-8 && /usr/sbin/update-locale LANG=C.UTF-8
ENV PYTHONIOENCODING UTF-8
ENV PYTHONPATH /app/
When i run this command docker build -t myimage ., it is giving error below.
"Step 17/20 : ADD app /app
ADD failed: stat /var/lib/docker/tmp/docker-builder687980062/.bashrc: no such file or directory"
I gave permission the above give path but it is not resolved. Please let me know how I can solve it.
First please make sure file is existing in proper directory. as error suggesting no such file or directory
Please instead of ADD try using COPY working for me
COPY .bashrc /root/
COPY .profile /root/
also make file exist at source place and destination is proper.
Also as per best practices you can merge line and make a single command
RUN apt-get update -yq \
&& apt-get install -y python3-dev build-essential -yq \
&& apt-get install curl -yq \
&& pip install -r requirements.txt \
&& apt-get purge -y --auto-remove gcc python3-dev build-essential
change to:
ADD .bashrc /root/
ADD .profile /root/
ADD app /
From documentation:
ADD src ... dest.
The dest is an absolute path, or a path relative
to WORKDIR, into which the source will be copied inside the
destination container.
I have create in docker 2 contains 1 to run the MSSQL server and the other a python container with the code to read data from an .xlsx file and inserting it into SQL server.
My Dockerfile has the below code :
FROM python:3.6-alpine
RUN apk update
RUN apk add gcc libc-dev g++ libffi-dev libxml2 unixodbc-dev mariadb-dev postgresql-dev
FROM continuumio/miniconda3
ADD test.py /
RUN apt-get update -y \
&& apt install python3 -y \
&& apt install python3-pip -y \
&& apt install python3-venv -y \
&& python3 -m venv venv
RUN apt-get -y install curl
**#Install FreeTDS and dependencies for PyODBC**
RUN apt-get update && apt-get install -y tdsodbc unixodbc-dev \
&& apt install unixodbc-bin -y \
&& apt-get clean -y
RUN apt-get update
RUN apt-get install -y tdsodbc unixodbc-dev
RUN apt install unixodbc-bin -y
RUN apt-get clean -y
RUN pip install pandas
RUN pip install pyodbc
RUN pip install DateTime
RUN pip install multiprocess
RUN pip install threaded
CMD [ "python", "./test.py" ]
It compiles successfully but fails every time i run the container with the below error :
pyodbc.Error: ('01000', "[01000] [unixODBC][Driver Manager]Can't open lib 'ODBC Driver 17 for SQL Server' : file not found (0) (SQLDriverConnect)")
I have been trying this for days but found no resolution.
Believe I need to install ODBC driver 17, if so how do I add it to my Dockerfile?
Trying to run Dockerfile and it fails at installing npm.
ERROR:
Unable to correct problems, you have held broken packages.
The command '/bin/sh -c apt-get install -y npm' returned a non-zero code: 100
Dockerfile:
FROM ubuntu:14.04
MAINTAINER Giacomo Vacca "giacomo.vacca#gmail.com"
ENV REFRESHED_AT 2015-01-19
ENV DEBIAN_FRONTEND noninteractive
RUN apt-get autoremove
RUN npm -v
RUN apt-get update
RUN apt-get upgrade -y
RUN apt-get install --yes curl
RUN curl --silent --location http://deb.nodesource.com/setup_0.10 | sudo bash -
RUN apt-get install -y nodejs
RUN apt-get install --yes build-essential
RUN rm /usr/bin/node
# needs this to find the nodejs exec
RUN ln -s /usr/bin/nodejs /usr/bin/node
RUN apt-get install -y npm <--- FAIL
RUN /usr/bin/npm install socket.io#0.9.14
EXPOSE 8080
ENTRYPOINT ["/usr/bin/node", "/root/server.js"]
You don't need to install npm from the ubuntu distribution with:
RUN apt-get install -y npm
because it's already installed by the nodejs package from nodesource. You can check it with:
dpkg -L nodejs | grep "/usr/bin/npm"