Marcel Maatkamp

HOW-TO: build a cheap vnc environment with docker

2015-03-06T20:41:00.001+00:00

HOW-TO: build a cheap vnc environment with docker

USE-CASE:

A docker container providing a desktop environment which can be used with any vnc client.

But with GUACAMOLE (also a docker container) any (hml5) browser can now connect and use this desktop environment!

HOW-TO:

Install an image with a desktop environment, accessible with a vnc-client:

docker vnc server

A Mac has a build-in vnc client, access it with safari:

And let it connect with the docker host:

And use the password 'vnc-password'

Thats simple, but you need a vnc client. Lets stream the desktop environment with html5 to a browser, so no vnc client needs to be installed.

we only need a browser!

Derquinse Gist.GitHub Gadget

And now you can access and use the desktop in a browser, no vnc client necessary!

Oracle Express Edition 11g Release 2 on Ubuntu 14.04.1 LTS

2015-03-06T20:40:00.001+00:00

Oracle Express Edition 11g Release 2 on Ubuntu 14.04.1 LTS

This is a modified Dockerfile with a working Oracle XE 11g.

Installation

$ docker pull marcelmaatkamp/docker-oracle-xe-11g

Run with 22 and 1521 ports opened:

$ docker run -d --name oracle -p 49160:22 -p 49161:1521 marcelmaatkamp/docker-oracle-xe-11g

Connect database with following setting:

hostname: docker host ip port: 49161 sid: XE username: system password: oracle

Password for SYS & SYSTEM
oracle

ESP8266 Crosstool-NG as Docker image

2015-03-06T20:38:00.004+00:00

CrossTool-NG

ESP8266

ESP8266 is a complete and self-contained Wi-Fi network solutions that can carry software applications, or through Another application processor uninstall all Wi-Fi networking capabilities. ESP8266 when the device is mounted and as the only application of the application processor, the flash memory can be started directly from an external Move. Built-in cache memory will help improve system performance and reduce memory requirements. Another situation is when wireless Internet access assume the task of Wi-Fi adapter, you can add it to any microcontroller-based design, the connection is simple, just by SPI / SDIO interface or central processor AHB bridge interface. Processing and storage capacity on ESP8266 powerful piece, it can be integrated via GPIO ports sensors and other applications specific equipment to achieve the lowest early in the development and operation of at least occupy system resources. The ESP8266 highly integrated chip, including antenna switch balun, power management converter, so with minimal external circuitry, and includes front-end module, including the entire solution designed to minimize the space occupied by PCB. The system is equipped with ESP8266 manifested leading features are: energy saving VoIP quickly switch between the sleep / wake patterns, with low-power operation adaptive radio bias, front-end signal processing functions, troubleshooting and radio systems coexist characteristics eliminate cellular / Bluetooth / DDR / LVDS / LCD interference.

Online community http://www.esp8266.com and https://nurdspace.nl/ESP8266 supporting all aspects of the ESP8266 and ESP8266EX. For more info see the wikihttps://github.com/esp8266/esp8266-wiki/wiki

This is a prebuild toolchain with every step from:

To start this image simply use:

$ docker run -ti --privileged marcelmaatkamp/esp8266-crosstool-ng:latest /bin/bash

Then test your setup by uploading the example code:

$ cd /opt/Espressif/source-code-examples/blinky
$ make ESPPORT=/dev/ttyUSB0 flash

The nodemcu firmware can be found in:

/opt/Espressif/nodemcu-firmware$ find . -name '*.bin'
./pre_build/0.9.2/512k-flash/nodemcu_512k_20141212.bin
./pre_build/0.9.2/512k-flash/nodemcu_512k_20141219.bin
./pre_build/0.9.2/512k-flash/blank512k.bin
./pre_build/0.9.2/1M-flash/nodemcu_1M_20141219.bin
./pre_build/0.9.2/4M-flash/esp_init_data_default.bin
./pre_build/0.9.2/4M-flash/eagle.app.v6.flash.bin
./pre_build/0.9.2/4M-flash/blank.bin
./pre_build/0.9.2/4M-flash/eagle.app.v6.irom0text.bin
./pre_build/0.9.2/2M-flash/esp_init_data_default.bin
./pre_build/0.9.2/2M-flash/eagle.app.v6.flash.bin
./pre_build/0.9.2/2M-flash/nodemcu_2M_20141219.bin
./pre_build/0.9.2/2M-flash/blank.bin
./pre_build/0.9.2/2M-flash/eagle.app.v6.irom0text.bin
./pre_build/0.9.4/512k-flash/nodemcu_512k_20141222.bin
./pre_build/0.9.4/512k-flash/blank512k.bin

To flash:

$ ./esptool.py --port /dev/ttyUSB0 write_flash 0x00000 0.9.4/512k-flash/nodemcu_512k_20141222.bin

To validate:

screen /dev/ttyUSB0 9600

>> node.restart();
NodeMcu 0.9.4 build 20141222  powered by Lua 5.1.4
>>

2015-02-24T07:57:00.000+00:00

This is a working example how to start the open-source Cluster Manager Apache Mesos in docker with RabbitMQ as example application.

Apache Zookeeper
Apache Mesos with

one master node and
one slave node

and with Mesosphere's Marathon as a docker provider, deploying one docker example application:
a RabbitMQ docker container as a clustered application

Step 1: Start Zookeeper

Step 2: Start Mesos Master node

Step 3a: Start Mesos Slave node 01, with docker over local unix socket, or..

Step 3b: Start Mesos Slave node 01, with docker over tcp socket

Step 4: Start Marathon to deploy docker applications in the cluster

Step 5: Generate a application deployment json, in this case for RabbitMQ

Step 6: Upload the deployment json into the cluster, thereby starting RabbitMQ

If everything went well the following pages are active:
http://:5050

http://:8080

To check where the managment page of RabbitMQ can be found, check with docker which external port is being mapped:
$ docker ps 



e20b7e044e17        rabbitmq:management  0.0.0.0:31002->5672/tcp, 0.0.0.0:31003->15672/tcp  mesos-4d56e476-b13e-4ac7-87ac-1b292f7cf96b
The management page can be found at:

http://:31003

http://www.flexthinker.com/2015/02/monitoring-docker-containers-with-cadvisor-from-marathon/

Parallel and Concurrent Programming in Haskell

2013-07-24T10:02:00.001+01:00

For a long time, the programming community has known that programming with threads and locks is hard. It often requires an inordinate degree of expertise even for simple problems and leads to programs that have faults that are hard to diagnose. Still, threads and locks are general enough to express everything we might need to write, from parallel image processors to concurrent web servers, and there is an undeniable benefit in having a single general API. However, if we want to make programming concurrent and parallel software easier, we need to embrace the idea that different problems require different tools; a single tool just doesn’t cut it. Image processing is naturally expressed in terms of parallel array operations, whereas threads are a good fit in the case of a concurrent web server. So in Haskell, we aim to provide the right tool for the job, for as many jobs as possible. If a job is found for which Haskell doesn’t have the right tool, then we try to find a way to build it.

via Delicious http://chimera.labs.oreilly.com/books/1230000000929/index.html

joshdmiller/ng-boilerplate · GitHub

2013-05-22T14:01:00.001+01:00

gBoilerplate is designed to make life easy by providing a basic framework with which to kickstart AngularJS projects. It contains a best-practice directory structure to ensure code reusability and maximum scalability. ngBoilerplate also comes prepackaged with the most popular design frameworks around: Twitter Bootstrap, UI Bootstrap, Font Awesome, and LESS. Lastly, it contains a sophisticated Grunt-based build system to ensure maximum productivity. All you have to do is clone it and start coding!

via Delicious https://github.com/joshdmiller/ng-boilerplate

Marionette.js – A scalable and composite application architecture for Backbone.js

2013-05-08T15:46:00.003+01:00

Backbone.Marionette is a composite application library for Backbone.js that aims to simplify the construction of large scale JavaScript applications. It is a collection of common design and implementation patterns found in the applications that we have been building with Backbone, and includes pieces inspired by composite application architectures, event-driven architectures, messaging architectures, and more.

via Delicious http://marionettejs.com/

AngularJS — Superheroic JavaScript MVW Framework

2013-05-08T15:46:00.001+01:00

AngularJS is a toolset for building the framework most suited to your application development. It is fully extensible and works well with other libraries. Every feature can be modified or replaced to suit your unique development workflow and feature needs. Read on to find out how.

via Delicious http://angularjs.org/#todo-js

LivIcons - Exclusive Truly Animated Icon Pack!

2013-05-03T19:31:00.003+01:00

via Delicious http://livicons.com/

SVG Patterns Gallery

2013-05-03T19:31:00.001+01:00

via Delicious http://philbit.com/svgpatterns/

Introduction · bio4j/Bio4j Wiki

2013-05-01T16:01:00.001+01:00

Bio4j is a bioinformatics graph based DB including most data available in Uniprot KB (SwissProt + Trembl), Gene Ontology (GO), UniRef (50,90,100), RefSeq, NCBI Taxonomy, and Expasy Enzyme DB. Bio4j provides a completely new and powerful framework for protein related information querying and management. Since it relies on a high-performance graph engine, data is stored in a way that semantically represents its own structure. On the contrary, traditional relational databases must flatten the data they represent into tables, creating "artificial" ids in order to connect the different tuples; which can in some cases eventually lead to domain models that have almost nothing to do with the actual structure of data.

via Delicious https://github.com/bio4j/Bio4j/wiki/Introduction

Giraph - Welcome To Apache Giraph

2013-05-01T11:46:00.001+01:00

Web and online social graphs have been rapidly growing in size and scale during the past decade. In 2008, Google estimated that the number of web pages reached over a trillion. Online social networking and email sites, including Yahoo!, Google, Microsoft, Facebook, LinkedIn, and Twitter, have hundreds of millions of users and are expected to grow much more in the future. Processing these graphs plays a big role in relevant and personalized information for users, such as results from a search engine or news in an online social networking site. Graph processing platforms to run large-scale algorithms (such as page rank, shared connections, personalization-based popularity, etc.) have become quite popular. Some recent examples include Pregel and HaLoop. For general-purpose big data computation, the map-reduce computing model has been well adopted and the most deployed map-reduce infrastructure is Apache Hadoop.

via Delicious http://giraph.apache.org/

CloudMade Downloads

2013-05-01T10:45:00.001+01:00

Welcome to the CloudMade downloads site. This is where you can find extracts of maps from different places around the world. From here you can download: OSM XML extracts by country Garmin Map Files (OSM.err edition) Osmosis country bounding polygon Shapefile extracts by country Navit maps by country GPX POI by country TomTom POI by country OSM XML feature extracts by country Adobe Illustrator files by country The files provided on these pages are created from OpenStreetMap map data. Because OpenStreetMap is a work in progress many of the countries are only partially mapped or are incomplete. The data contained on these pages has not been checked or verified by CloudMade and we don't recommend using it for any mission critical applications. For more information please read the terms and conditions.

via Delicious http://download.cloudmade.com/europe/western_europe/netherlands#downloads_breadcrumbs

gmr/rabbitmq-pulse · GitHub

2013-04-29T09:32:00.001+01:00

RabbitMQ Pulse is an experimental exchange plugin for RabbitMQ 3.0+ that publishes information made available by the rabbitmq-management plugin making cluster monitoring a push event instead of something you poll for. Messages can be published in JSON format as they would be received from the management API or they can be published in a format that is compatible with Graphite's carbon AMQP client, providing conversionless integration into Graphite and systems like rocksteady. This is a work in progress and is not meant for production systems (yet).

via Delicious https://github.com/gmr/rabbitmq-pulse#readme

elasticsearch-river-rabbitmq/README.md at master · elasticsearch/elasticsearch-river-rabbitmq · GitHub

2013-04-29T09:17:00.001+01:00

RabbitMQ River Plugin for ElasticSearch The RabbitMQ River plugin allows index bulk format messages into elasticsearch.

via Delicious https://github.com/elasticsearch/elasticsearch-river-rabbitmq/blob/master/README.md

Spark Overview - Spark 0.7.0 Documentation

2013-04-25T13:46:00.001+01:00

Spark is a MapReduce-like cluster computing framework designed for low-latency iterative jobs and interactive use from an interpreter. It provides clean, language-integrated APIs in Scala, Java, and Python, with a rich array of parallel operators. Spark can run on the Apache Mesos cluster manager, Hadoop YARN, Amazon EC2, or without an independent resource manager (“standalone mode”).

via Delicious http://www.spark-project.org/docs/latest/index.html

Spout - Spout Wiki

2013-04-25T11:01:00.001+01:00

Spout is an upcoming server/client software, written from the ground up (not a server mod like CraftBukkit). It is not focused on Minecraft; focusing instead on a general framework for voxel-based games. The Minecraft implementation of it is in the Vanilla plugin , which you will read more about below. Spout is a multiplatform game engine written in Java. Spout is multithreaded at its core, and designed for "Voxel" or 3D tile-based games, like Minecraft, Infiniminer, etc. Spout has no game code in it, however it is very extendable through the use of SpoutAPI and plugins. Plugins can be used to create full, standalone games, mods of those games, or utilities for managing servers or games, all through the same API.

via Delicious http://wiki.spout.org/Spout

Reco4j - The Graph-Based Recommender Engine

2013-04-20T20:01:00.001+01:00

Reco4j is an open source project that aims at developing a recommendation framework based on graph data sources. We choose graph databases for several reasons. They are NoSQL databases that are "schemaless". This means that it is possible to extend the basic data structure with intermediate information, i.e. similarity value between item and so on. Moreover, since every information are expressed with some properties, nodes and relations, the recommendation process can be customized to work on every graph. Indeed Reco4j can be used on every graph where "user" and "item" are represented by nodes and the preferences are modelled as relationship between them.

via Delicious http://www.reco4j.org/index.jsp

three.js - JavaScript 3D library

2013-04-20T07:48:00.001+01:00

via Delicious http://mrdoob.github.io/three.js/

Neo4j Blog

2013-04-20T07:15:00.001+01:00

via Delicious http://blog.neo4j.org/

Metro Extracts

2013-04-19T16:46:00.001+01:00

Cities in Openstreetmap

via Delicious http://metro.teczno.com/#amsterdam

SVG Patterns Gallery

2013-04-19T10:01:00.001+01:00

via Delicious http://philbit.com/svgpatterns/#honeycomb

MagicMap OpenWRT - Nomads

2013-04-10T13:01:00.001+01:00

MagicMap OpenWRT-Sniffer (kurz: MMopenWRT) ist ein Client für das Funkortungssytem MagicMap, der unter dem Linux-Derivat OpenWRT läuft. Der MMopenWRT-Client scannt einerseits WLAN-Signalstärken im Monitor-Modus sowie andererseits Bluetooth-Signale. Beide Scans werden über das MagicMap Web Service-Interface an den MagicMap-Server geschickt. Hier findet eine Auswertung der Signale statt, so dass die Wege, die die Personen (bzw. ihre Mobilgeräte) zurückgelegt haben analysiert werden können. Es handelt sich um einen symmetrischen Ansatz, d.h. der MMopenWRT Sniffer kann sowohl in einer Infrastruktur zur Ortung mobiler Geräte eingesetzt werden (siehe z.B. Bluetooth Tracking), oder er kann auf einem mobilen Gerät eingesetzt werden und dessen Ortung innerhalb einer vorhandenen WLAN/Bluetooth Infrastruktur übernehmen (siehe z.B. Ortung von Gabelstaplern). MMopenWRT ist eine reine Softwarelösung, die auf handlesüblicher Hardware eingesetzt werden kann.

via Delicious http://wiki.informatik.hu-berlin.de/nomads/index.php/MagicMap_OpenWRT

MagicMap | Ein System zur kooperativen Positionsbestimmung über WLAN

2013-04-10T08:08:00.001+01:00

MagicMap ist eine reine Softwarelösung, die bei den mobilen Systemen außer einer konventionellen WLAN-Ausstattung keine weitere Hardware erfordert. Die WLAN Access Points können beliebig verteilt sein und es sind weder Eingriffe an der AP-Hardware noch an der Software nötig.

via Delicious http://www.magicmap.de/

Lime Microsystems

2013-04-09T19:01:00.001+01:00

Lime supports Myriad-RF, an open-source, non-profit project for the prototyping and creation of fully configurable wireless platforms that run on almost any communication standard and frequency. Openness is at the heart of the Myriad-RF project and the project stipulates open source design files must be made available for all boards listed on the site. Many boards will also be made available via distribution partners who sign up to the scheme and its values. Beta launched in February 2013, Myriad RF has a growing number of boards and projects listed on the site that are all based on easy-to-use hardware and software. This openness and simplicity means Myriad-RF boards are fully customisable and meet the demands of both experienced industrial designers developing advanced systems; as well as students or hobbyists wanting to create low-cost RF applications or simply learn more about RF and communication systems.

via Delicious http://www.limemicro.com/open_source/