Marcel Maatkamp: 2015

vrijdag 6 maart 2015

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

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

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
>>

dinsdag 24 februari 2015

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/