how to make the client cgoban3 work in a container

Question

I play go on kgs. The client is never updated. For security reasons I wanted to put it in a container. On my ubuntu host pc I can launch the client without any problem. The java version used is :

$ java -version
openjdk version "1.8.0_275"
OpenJDK Runtime Environment (build 1.8.0_275-8u275-b01-0ubuntu1~18.04-b01)
OpenJDK 64-Bit Server VM (build 25.275-b01, mixed mode)

He goes like this: $ java -jar cgoban.jar https://www.gokgs.com/help/downloads.html The client, raw jar file, can be downloaded here : http://www.gokgs.com/download.jsp

As the container shuts down after startup I modified my dockerfile to look for problems, now it looks like this:

# Alpine Linux with OpenJDK JRE
FROM openjdk:8-jre-alpine
RUN apk add --no-cache bash
RUN mkdir /app
COPY cgoban.jar /app 
VOLUME [/tmp,/app]

docker build -t cgoban:latest .

docker run -ti -p 5667:5667 --name gob9 cgoban:latest

It works well.

Inside my container the java version is :

/app # java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (IcedTea 3.12.0) (Alpine 8.212.04-r0)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)

I get the following error : /app # java -jar cgoban.jar

Exception in thread "main" java.lang.ExceptionInInitializerError
    at org.igoweb.cgoban.CGoban.(CGoban.java:157)
    at org.igoweb.cgoban.CGoban.main(CGoban.java:62)
Caused by: java.lang.NullPointerException
    at sun.awt.FontConfiguration.getVersion(FontConfiguration.java:1264)
    at sun.awt.FontConfiguration.readFontConfigFile(FontConfiguration.java:219)
    at sun.awt.FontConfiguration.init(FontConfiguration.java:107)
    at sun.awt.X11FontManager.createFontConfiguration(X11FontManager.java:774)
    at sun.font.SunFontManager$2.run(SunFontManager.java:431)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.font.SunFontManager.(SunFontManager.java:376)
    at sun.awt.FcFontManager.(FcFontManager.java:35)
    at sun.awt.X11FontManager.(X11FontManager.java:57)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at java.lang.Class.newInstance(Class.java:442)
    at sun.font.FontManagerFactory$1.run(FontManagerFactory.java:83)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.font.FontManagerFactory.getInstance(FontManagerFactory.java:74)
    at java.awt.Font.getFont2D(Font.java:491)
    at java.awt.Font.access$000(Font.java:224)
    at java.awt.Font$FontAccessImpl.getFont2D(Font.java:228)
    at sun.font.FontUtilities.getFont2D(FontUtilities.java:180)
    at sun.font.StandardGlyphVector.initFontData(StandardGlyphVector.java:1126)
    at sun.font.StandardGlyphVector.init(StandardGlyphVector.java:1115)
    at sun.font.StandardGlyphVector.(StandardGlyphVector.java:172)
    at java.awt.Font.getStringBounds(Font.java:2421)
    at java.awt.Font.getStringBounds(Font.java:2331)
    at com.gokgs.client.swing.KgsPlaf.createDefaultValues(KgsPlaf.java:111)
    at com.gokgs.client.swing.KgsPlaf.(KgsPlaf.java:61)
    ... 2 more

I don't see what I can do to make the customer work. Has anyone already done this containerisation or do you have any leads?

Thank you in advance for your help,

how to make the client cgoban3 work in a container

0 Answers