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Drawing vector art: Kumamoto Kenjinkai mascot

kinow @ Apr 19, 2016 21:39:03 ()
Kumamoto Kenjinkai mascot
Kumamoto Kenjinkai mascot

For Brazilian Kumamoto Kenjinkai. Done with Macromedia Freehand MX, some long time ago.

Trying SaltStack with Docker

kinow @ Apr 17, 2016 22:06:03 ()

Some weeks ago I started learning SaltStack for a project at work. But I couldn’t find a good Docker image for that and I had to ask the Ops team for some VM’s. We are having a rainy weekend in Auckland, so I decided to have another look at the Jenkins SaltStack Plug-in.

But now since I was at home, I couldn’t use the VM’s that I had access to at work. So decided to look again at Docker or Vagrant images. After playing with a few images, I found bbinet/salt-master. It not only sets up a master, but also provides an easy way to enable the cherrypy API (necessary for the Jenkins plug-in).

This post describes the steps that I took to have a running Salt Master with the API enabled. First you need to create some directories and files to use with the image.

shell$ mkdir ~/master && cd ~/master
shell$ mkdir -p config/master.d/
shell$ vim config/master.d/api.conf

The api.conf contains the SaltStack API configuration. You can change port, user and other settings if necessary. Just remember to add a credential in Jenkins for the plug-in.

# File: api.conf
external_auth:
  pam:
    saltapiuser:
      - .*
      - '@runner'
      - '@wheel'
      - '@jobs'
rest_cherrypy:
  port: 8000
  host: 0.0.0.0
  disable_ssl: True
  static: /opt/molten
  static_path: /assets
  app: /opt/molten/index.html
  app_path: /molten

The image also conveniently provides a script that is executed before the entry point (if provided). So we can also create a user for the API automatically when the image is created.

shell$ vim config/before-exec.sh
#!/bin/bash
# File: before-exec.sh
useradd saltapiuser
echo -e "nosecret\nnosecret\n" | passwd saltapiuser
exit 0

Also make the script executable.

chmod +x config/before-exec.sh

And finally start the container.

docker run --name salt-master -v $PWD/config:/config \
    -p 4505:4505 -p 4506:4506 -p 443:443 -p 8000:8000 \
    bbinet/salt-master

Once the container is running, you can go to http://localhost:8000 and log in as saltapiuser:nosecret, and also configure your plug-in in Jenkins.

Happy hacking!

Geek Vacation 2016

kinow @ Apr 08, 2016 22:17:03 ()

I just had a two week vacation, and I tried to use my time to rest, play some music, and complete a geek todo-list.

The list included things that I used some time ago but wanted to refresh my memory, things that I already used but never spent time reading the manuals, and other things that I saw somewhere but never actually used in any project.

Here the complete list, with the items that were completed highlighted. Some links with pointers to what I used to study.

Going to have less spare time now for Open Source and learning the rest of the stuff on this list, but there’s always some books to read, and things to learn anyway right ¯\(ツ)

Deploying WAR files to Tomcat with Jenkins

kinow @ Mar 20, 2016 15:29:03 ()

Table of Contents

A co-worker asked me this week about how to deploy a WAR file to Tomcat with Jenkins. In my team we are currently maintaining and deploying about 10 Java web systems, but we have no consistent way of deploying the applications to Tomcat yet. In the past I used Ant, Maven, Cargo, Grunt, and Jenkins, so I decided to write this short post to show a few different ways it can be achieved, à la Perl’s TMTOWTDI motto.

#1 Deploying with custom scripts

At first you may be tempted to write your own script to deploy to Tomcat with some Shell, Perl, Python or Java. But I think I would choose this option only because either I needed some feature that is not available in the other options, or in order to call other tasks or debug some problem.

Example:

$ docker run -d -p 8888:8080 jeanblanchard/tomcat:8
$ git clone https://github.com/spring-projects/spring-petclinic.git && cd spring-petclinic && mvn package
$ curl --upload-file target/petclinic.war "http://admin:[email protected]:8888/manager/text/deploy?path=/spring-petclinic&update=true"
OK - Deployed application at context path /spring-petclinic

( Read more ... )

Drawing sketch: Cheese

kinow @ Mar 20, 2016 11:13:03 ()
Cheese
Cheese

For redditgetsdrawn