DCE Standard Build

We strive for consistency, reproducibility, and maintainability in our system builds. We are heavily influcenced by books like The DevOps Handbook and The Phoenix Project.

When building systems, we strive to build everything via ansible scripts. Our goal is to never build or even tweak settings by hand, as this leads to bespoke and unpredictable systems.

The core of our build is in ansible-samvera. DCE-specific configuration (e.g., DCE SSL certs) is in a private repo called dce-cm. Client specific server builds will be in private repos named appropriately, which pull from ansible-samvera and dce-cm as needed.

Standard build profile

After September 2019 - ansible samvera > 1.5.0

Software	version	Notes
Operating System
Ubuntu	18.04 LTS
Ruby
Ruby	2.6.3
Passenger	6.0.4
Database
Postgresql	latest
redis	latest
Fedora Repository		We back fedora with Postgresql
Tomcat	8.x
Fedora	4.7.5
Solr		We run solr as a standalone service, not inside of Tomcat
Solr	7.7.1
Graphics		We compile ImageMagick with these specific library versions because through trial and error we have determined this produces the widest range of acceptable derivative images
ImageMagick	7.0.7
gs (ghostscript)	9.19
openjpeg	2.1.0
libtiff	4.0.5
libpng	1.6.34
FITS		We install FITS as both a standalone command-line script, and as a Tomcat 8 servlet.
FITS	1.4.0

Before September 2019 - ansible samvera <= 1.5.0

Software	version	Notes
Operating System
Ubuntu	16.04 LTS
Ruby
Ruby	2.4.2
Passenger	5.3.2
Database
Postgresql	latest
redis	latest
Fedora Repository		We back fedora with Postgresql
Tomcat	7.x
Fedora	4.7.5
Solr		We run solr as a standalone service, not inside of Tomcat
Solr	6.6.2
Graphics		We compile ImageMagick with these specific library versions because through trial and error we have determined this produces the widest range of acceptable derivative images
ImageMagick	7.0.7
gs (ghostscript)	9.19
openjpeg	2.1.0
libtiff	4.0.5
libpng	1.6.34
FITS
FITS	0.8.4