Running an enriched Jupyter Notebook runtime in a Docker Container – locally or cloud side

Data Wrangling is a crucial stage in the data science workflow. Or in any workflow that starts from raw data and hopes to achieve business insight – and perhaps ready to run well trained machine learning models. Data wrangling encompasses various steps and activities -from gathering raw data, exploring, validating, filtering, filling in missing values, joining, enriching, aggregating, shape shifting, unifying. No clear break may be apparent between gathering, preparing, exploring, visualizing and modelling the (more...)

Creating a Katacoda scenario – A Tailor Made On Line Tutorial Environment – for example for Jupyter Notebook

Learn new technologies using real environments – right in your browser. Katacoda is an online platform that offers hundreds of scenarios and sandbox environments to learn about and play with different kinds of technologies. Katacoda is special in that it not only offers the handson instructions – it also provides the runtime environment in which these steps can be executed instantly. Examples of such environments: Linux server, Docker engine, Kubernetes cluster and almost anything that (more...)

Docker with Oracle database: install patches automatically

Recently I had to install the patch for fixing cross-platform PDB transport bug onto the docker images with Oracle, so these are easy way how to do it:

1. create directory “patches” and create “”:


unzip  -u ./*.zip

for D in *; do
    if [ -d "${D}" ]; then
        echo =================================================
        echo " *** Processing patch # ${D}... "   # your processing here
        cd "${D}"
        opatch apply -silent
    cd  (more...)

Docker summary

Today just a summary posting of all my docker activities:

How to use node-red to interact with twitter

Recently I had to setup an application that was able to read twitter and, based on some predefined keywords,  had to reply to specific tweets. I decided to have a look at node-red to set this stuff up. It proofed to be rather straightforward and easy to implement. The hardest part was to get approval for a twitter developer account. In this post I describe how I used node-red and how I

Docker on Oracle Linux

It occurred to me that if you want to start using Docker there are plenty examples that use Ubuntu as a base platform. I read a book called Learning Docker that assumes Ubuntu for the examples. I know I am quite stubborn, a "know-it-better" person, but I want to be able to do the same on Oracle Linux.

Docker on Oracle Linux turns out not too complicated. But I ran in to a caveat that (more...)

Setting up Docker on Oracle Linux 7

Docker has become widely popular in the last couple of years. I use it on a regular basis these days for running Oracle databases on my laptop. Docker is available on all popular Linux distributions, as well as Mac and Windows, and of course Oracle Linux is no exception. Since a long time Docker ships … Continue reading "Setting up Docker on Oracle Linux 7"

Docker: Networking with docker swarm: creating new subnets/gateways/…

In this posting i explained how to configure the network for a container on a docker machine.
If you want to do this for a docker swarm, you have to change the commands. The network driver "bridge" does not work in swarm mode:
(How to run a container inside a swarm take a look here)

docker service create  --network mybrigde --name helloworld alpine ping

Error: No such network: mybrigde
Even (more...)

Docker: Network configuration: How to customize the network bridge and use my own subnet / netmask / CiDR

In my last posting i described how to configure the network settings of a container via docker command line:
--net none
--net bridge
Now i want to try to change the subnet from the standard to another ip range.

There are some tutorials out there which say:

docker run -it  --net bridge  --fixed-cidr ""  alpine /bin/ash
unknown flag: --fixed-cidr
but this doesa not work any more.

First you (more...)

Docker: Network configuration – none / brigde / hostname / dns entries

If you are starting your docker container you can add some network configuration details via command line.
Let's start with the easiest network setting:
docker run -it  --net none alpine /bin/ash
This setting starts the container without any connectivity to the network:
# ip addr show
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet scope host lo
       valid_lft forever preferred_lft forever

Docker: How to limit memory

By starting your container you can limit the RAM usage simply by adding
-m 4M

(this limits the memory to 4 megabytes).

To check this simply run:

docker run -it -m=4M  --rm alpine /bin/ash

and on your docker machine check the following entry:

alpine:~# cat /sys/fs/cgroup/memory/docker/4ce0403caf667e7a6d446eac3820373aefafe4e73463357f680d7b38a392ba62/memory.limit_in_bytes 

Docker: Lessons learned – Logging

After some time working with docker here my experiences:

Some days ago i created my own container with a minimal web service.

Here the
sed -i  's/Hostname:.*/Hostname: '$HOSTNAME'/g' index.html
while true; do { echo -e 'HTTP/1.1 200 OK\r\n'; cat index.html;}  | nc  -l -p 8080  2>&1 >> logfile; done
This is the Dockerfile:
FROM alpine


RUN mkdir ncweb

ADD .  /tmp

ENTRYPOINT [ "/tmp/" (more...)

ADF on Docker – Java Memory Limit Tuning for JVM

It might look like a challenge to run Java in Docker environment, by default Java is not aware of Docker memory limits. Check this article for example - Java inside docker: What you must know to not FAIL.  I was able to run WebLogic and ADF (Essential WebLogic Tuning to Run on Docker and Avoid OOM) on Docker previously without Java memory issues, using JAVA_OPTIONS=-XX:+UnlockCommercialFeatures -XX:+ResourceManagement -XX:+UseG1GC. However after Docker upgrade (more...)

Docker Oracle and local installs

| Mar 14, 2018
So you want Docker and to install and Oracle Database locally.  So did I and while I have VirtualBox and the Oracle Developer Day VM, I wanted to setup docker and the Oracle Database
Well Colm Divilly (@cdivilly) has cleared it up for me.  His Gist on on Github had me up and running. Very little work on my part here, following Colm's detailed instructions, (barring time for downloads) I had docker (more...)

Get going with Project Fn on a remote Kubernetes Cluster from a Windows laptop–using Vagrant, VirtualBox, Docker, Helm and kubectl

| Mar 4, 2018


The challenge I describe in this article is quite specific. I have a Windows laptop. I have access to a remote Kubernetes cluster (on Oracle Cloud Infrastructure). I want to create Fn functions and deploy them to an Fn server running on that Kubernetes (k8s from now on) environment and I want to be able to execute functions running on k8s from my laptop. That’s it.

In this article I will take you on a (more…)

Using SQL*Plus to Seed your Dockerized Oracle Database

In my last blog, you learned  to create a containerized Oracle database for your development/testing purpose. You also know how to connect to your container and run command in the container.

Most applications require some reference data e.g. example,my  OrderApp application based on Apache Tom EE  requires catalog data to be pre-populated before I can test my application. 

One of the readers asked me how can we run a SQL (more...)

Dockerizing Your Development and Test Oracle databases

You are probably reading this blog because your application depends on Oracle database. Most enterprises in the world depend on Oracle database to run their business. If you are a developer using Oracle database and getting started with Docker, you must be wondering how can you use a containerized Oracle database. 

In my last blog, I outlined how you can use a Dockerized Tomcat /Tom EE with an Oracle database. In this blog, (more...)

Dockerize Tomcat/Tom EE and Oracle database applications

Docker ... Docker -- everywhere ..

Docker has gained quite a bit of popularity in simplifying operations for micro services applications. It also helps reduce cost of development and testing applications improves developer productivity it’s the portable characteristics and by allowing them to create local development environment that mimics production.

In this article, I will show how you can containerize or Dockerize a simple web application application that uses Apache Tomcat / Tom EE and Oracle database. (more...)

Oracle Traffic Director in Docker

As I am currently working a lot with Docker and I already managed to place Oracle Forms & Reports into Docker, my next goal was to use the Oracle Traffic Director as well in Docker.

Based on my blog post "How to install and configure Oracle Traffic Director 12c - fully unattended", I have converted and aligned my scripts to be used in a Docker Image.

The Oracle Traffic Director (more...)

Oracle Forms & Reports on Docker – The Concept and Technique behind

In the last days I was working on my Oracle Forms & Reports in Docker solution and I already published it via my blog and in my personal GitHub Repository.