= Opal HowTo Install

Tags: [[HowTo]] [[Opal]]

See: [[http://wiki.obiba.org/display/OPALDOC/Opal+Installation+Guide]]

== Process

We followed the `Installation of Opal Zip distribution` instructions that installed Opal from a zip file.

1. Download Opal distribution into the `/local/` directory
1. Unzip the Opal distribution. Note that the zip file contains a root directory named `opal-server-{version}`.
1. Create an Opal home directory (to facilitate subsequent upgrades) using the command `mkdir opal-home`.
1. Create a symbolic link to the Opal server directory, using the command `ln -s opal-server-{version} opal_server`
1. Copy the `conf` directory from the server directory into the home directory, using the command `cp -r opal-server/conf opal-home`.
1. Create a script called `start_opal.sh` in the `/local/` directory containing the following:

{{{
#!/usr/bin/env bash

echo "Starting Opal"

export JAVA_OPTS="-Xmx2G -XX:-UseCompressedClassPointers"
export OPAL_HOME="/local/opal-home"

/local/opal-server/bin/opal

echo "Ended"
}}}

The java options are:
 -Xmx2G:: increase the memory allocated to Java to 2GB
 -XX:-UseCompressedClassPointers:: Do not compress class pointers (because Opal creates too many classes?)

== Running as wwwrun

=== Permissions

The following permission changes should be used to make Opal run as wwwrun, but they don't work yet!

{{{
find /local/opal-server -type d -exec setfacl -m d:u:wwwrun:rwx {} \;
find /local/opal-home -type d -exec setfacl -m d:u:wwwrun:rwx {} \;
find /local/opal-server -type d -exec setfacl -m u:wwwrun:rwx {} \;
find /local/opal-home -type d -exec setfacl -m u:wwwrun:rwx {} \;
}}}

=== Starting Opal

So this doesn't work either.

{{{
sudo -u wwwrun /local/start_opal.sh
}}}

''Olly says in his documentation that you shoudl be able to start Opal bin running opal-server/bin/opal start.  I need to check this oout when it's running properly.''

[[ToDo]]: '''This needs to start on boot'''

== Installing RServe

=== Resources

- [[https://rforge.net/Rserve/]]
- [[http://cran.r-project.org/web/packages/Rserve/Rserve.pdf]]

=== Installation

Again from Olly's notes:

{{{
sudo -u wwwrun R
install.packages('Rserve')
}}}

- When you install the package in R it puts a folder called `R` in your home directory. Several Layers down this you will find the RServe binary.  Mine in at `~/R/x86_64-suse-linux-gnu-library/3.1/Rserve/libs/Rserve`.  At the minute it errors that it doesn't know where the R home directory is, but hopefully I can find that out from somewhere.

[[ToDo]]: '''This needs to be started on reboot'''.  An example of how to do it can be found at: http://wiki.obiba.org/display/OPALDOC/R+Server+Installation+Guide.

[[BackLinks]]