I want to install docker in imx6ul phytec rugged board.
How to install So that I can run docker image and set required configuratio using docker.
enter image description here
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I want to use docker to help me stay organized with developing and deploying package/systems using ROS (Robot Operating System).
I want to have multiple containers/images for various pieces of software, and a single image that has all of the ROS dependencies. How can I have one container use the apt-packaged from my dependency master container?
For example, I may have the following containers:
MyRosBase: sudo apt-get install all of the ros dependencies I need (There are many). Set up some other Environment variables and various configuration items.
MyMoveApplication: Use the dependencies from MyRosBase and install any extra and specific dependencies to this image. Then run software that moves the robot arm.
MySimulateApplication: Use the dependencies from MyRosBase and install any extra and specific dependencies to this image. Then run software that simulates the robot arm.
How do I use apt packages from container in another container without reinstalling them on each container each time?
You can create your own images that serve you as base images using Dockerfiles.
Example:
mkdir ROSDocker
cd ROSDocker
vim Dockerfile-base
FROM debian:stretch-slim
RUN apt-get install dep1 dep2 depn
sudo docker build -t yourusername/ros-base:0.1 -f Dockerfile-base .
After the build is complete you can create another docker file from this base image.
FROM yourusername/ros-base:0.1
RUN apt-get install dep1 dep2 depn
Now build the second images:
sudo docker build -t yourusername/mymoveApplication:0.1 -f Dockerfile-base .
Now you have an image for your move application, each container that you run from this image will have all the dependencies installed.
You can have docker image repository for managing your built images and sharing between people/environments.
This example can be expanded multiple times.
I have a base image which contains OS+JDK and building my image on top of this. I have "yum install sftp" in my Docker file right after the "FROM base image".
Now, I would like to include "yum install sftp" also to my base image, so that I don't have to have this step in my DockerFile. I do not have much experience on building base image.
Create your own base image is just same as your own image.
Old:
FROM openjdk:8u151
RUN yum install sftp
New:
dockerid/baseimage
FROM openjdk:8u151
RUN yum install sftp
app dockerfile
FROM dockerid/baseimage
Of course, you need to commit your base image.
I have a simple docker build that I want to achieve. Pull the base image odoo:9 and install pika library
FROM odoo:9
RUN pip install pika
but can't proceed as I'm getting this error. enter image description here
btw, I am using docker in windows environment.
My solution is that, I just pull the Dockerfile from the official Docker Odoo. Add the line "&& pip install pika" as shown in the attached image. enter image description here
build again and you have a customize docker image with pika library installed.
I just started with docker and want to start creating my containers. Most of my containers have the same environment (JAVA, wget, monit, etc.) all on CentOS 6.5. I pulled my CentOS 6.5 base image and wanted to know if it is possible to modify the base CentOS image to have all these environment requirements or do I need to make the change on a container then create my other containers using the one container? It would be nice if I could just modify the base CentOS image itself.
Make your own base image FROM the base centos image (I recommend you to use a Dockerfile). Then run your container from this new custom base.
Dockerfile
FROM centos:6.5
RUN yum update -y && yum -y install wget ...
Then tag that image
docker build -t myown_centos .
Next you can create other images from this one.
FROM myown_centos
....
You cannot actually modify someone else base image but can create your own base image with the help of other base images.
FROM ubuntu ENV LANG C.UTF-8
Now build you image using docker build and publish it by using docker push command on you docker hub account. Now, you can pull that uploaded image whenever you needed it without wasting your time on setting up the enviroment.
You can also find images on hub.docker.com which have environment path setup in the Dockerfile like the java docker images.
It has pre-enviroment setup in the image itself.
ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64
ENV JAVA_VERSION 8u91
ENV CA_CERTIFICATES_JAVA_VERSION 20140324
TL;DR: once the image built it needs to be start as a new container. Old base-container is not updated through the build process.
I have built an image from Dockerfile starting from ubuntu, I've noticed that although I am installing php5-pgsql on the Dockerfile:
apt-get update
apt-get install php5-pgsql
After building the image successfully, I've noticed it would not have any effect on the container.
I had to exec into the container, and run the above command lines, then restart the container before I can start using the installed extension.
Any one can explain why? isn't the image has the extension already installed?
The image itself it is just a template used to run containers. You have to start a new container based on the newly generated image(i.e. template).