A docker image with openjdk 8 jre and wkhtmltopdf
With this docker image you have both openjdk jre 8 and wkhtmltopdf available (that's what I need now). Wkhtmltopdf is downloaded automatically from the official binaries during the build.
Because Debian jessie, the base image for openjdk images, has some problems with the included wkhtmltopdf ("QXcbConnection: Could not connect to display" error).
I've make a five minutes try with oraclejdk-alpine as a base without success due to a docker bug.
So, I've tried porting the Docker-Alpine-wkhtmltopdf method (wkhtmltopdf compilation from source) with a oraclejdk-alpine base image: the build was failing because initially some dependencies weren't found in /alpine/edge/testing:
ERROR: unsatisfiable constraints:
fonts-base (missing):
required by: world[fonts-base]
fonts-extra (missing):
required by: world[fonts-extra]
Then I've found a way (see notes above) to build wkhtmltopdf from sources on oraclejdk-alpine base image, but the build take a very long time to complete.
Using (today) the Alpine provided package is also unuseful, because, like Debian, the Alpine included package doesn't works as expected. Somebody also ended including a custom built binary but from my point of view this is not very security-friendly.
You can use this as a base image for your images, e.g.:
FROM lifeisfoo/docker-java-wkhtmltopdf
COPY build/libs/your-application-all.jar /
CMD java -jar your-application-all.jar
So your application can use the command to generate pdf the code.
You can use it as a standalone image for creating pdf directly from files:
echo "<h1>Hello</h1><i>world</i>" > hello.html
docker run -v `pwd`:/pages lifeisfoo/docker-java-wkhtmltopdf wkhtmltopdf file:///pages/hello.html - > hello.pdf
Or from URLs:
docker run lifeisfoo/docker-java-wkhtmltopdf wkhtmltopdf github.com - > github.pdf
http://wkhtmltopdf.org/usage/wkhtmltopdf.txt
§ It is possible to manually add single fonts as dependencies because fonts-base and fonts-extra was only meta-packages: