Nexus Setup

NOTE: These steps are obsolete. Please see: Nexus Setup for current instructions.

To install Nexus:

Use the latest Java 8 release version of Java available from OpenJDK.

Java runtimes above Java 8 have not been verified - do not use them:

pi@raspberrypi:~ $ java -version
java version "1.8.0"
Java(TM) SE Runtime Environment (build 1.8.0-b132)
Java HotSpot(TM) Client VM (build 25.0-b70, mixed mode)

Download the Nexus bundle from Nexus 3 Download.

Create a new “nexus” folder at /home/pi/nexus and copy the Nexus bundle into it:

pi@raspberrypi:~ $ pwd
/home/pi
pi@raspberrypi:~ $ mkdir nexus

then:

my-pc$ scp ~/Downloads/nexus-3.15.2-01-unix.tar.gz pi@the-Pi-IP-address:/home/pi/nexus/

Unzip/untar the Nexus bundle:

pi@raspberrypi:~ $ cd nexus
pi@raspberrypi:~/nexus $ tar -zxvf nexus-3.15.2-01-unix.tar.gz

If you try to launch Nexus now, you will likely see an error like the one below:

Java HotSpot(TM) Server VM warning: INFO: os::commit_memory(0x28e00000, 419430400, 0) failed; error='Cannot allocate memory' (errno=12)
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 419430400 bytes for committing reserved memory.
# An error report file with more information is saved as:
# /home/pi/nexus/nexus-3.15.2-01/hs_err_pid1755.log

A Pi currently only has 1GB of RAM, so you need to configure Nexus to use less RAM than normal, and allocate more to direct memory for use by the database. Move into the nexus bin dir, and edit the nexusvm.options file:

pi@raspberrypi:~/nexus/nexus-3.15.2-01/bin $ vi nexus.vmoptions

Change:

-Xms1200M
-Xmx1200M
-XX:MaxDirectMemorySize=2G

to:

-Xms320M
-Xmx320M
-XX:MaxDirectMemorySize=320M

Launch nexus.

To see the log output on the console, use this command:
```
pi@raspberrypi:~/nexus/nexus-3.15.2-01/bin $ ./nexus run
```
Startup can take a while. The command above will print messages to the console while Nexus is starting. You could also ‘tail’ the nexus log file to watch startup progress using a command like this:
```
pi@raspberrypi:~/nexus $ tail -n 500 -f ~/nexus/sonatype-work/nexus3/log/nexus.log
```
Watch for a message like:
```
-------------------------------------------------

Started Sonatype Nexus OSS 3.15.2-01

-------------------------------------------------
```
While Nexus is starting, you can monitor the system work load using top. Wait for the java process to ease up on the cpu (well below 100% CPU in top). Then from your PC, open the link below to Nexus running on the Pi:
```
http://the-Pi-IP-address:8081
```
The default Nexus administrator credentials are user: admin, password: admin123.

Huzzah! Nexus is running on your Pi.

Next step: Nexus Deamon

PiNexus

Nexus Setup