XDOCKER-87: create image for external SOLR, add example compose file

[Mario-Hofstaetter]

https://jira.xwiki.org/browse/XDOCKER-87

• Add dockerfile for /contrib/solr/ . This custom image downloads the correct xwiki-platform-search-solr-server-data.jar , the image uses the latest Apache SOLR image as base

• Add demo compose file docker-compose-postgres-index.yml, it uses the already existing environment variable INDEX_HOST of the web container. Since it must have the xwiki version, 10.9 has been used for the demo.

[vmassol]

What is this doing and where is solr-init.sh coming from?

[Mario-Hofstaetter]

solr-init.sh was already there and has not been changed.
See: https://github.com/xwiki-contrib/docker-xwiki/blob/master/contrib/solr/solr-init.sh
Look into the file, it has comments. It looks for the *.jar and unzips it to /opt/solr/server/solr/

[vmassol]

Thanks @Mario-Hofstaetter. What about locating the new dockerfile for SOLR in https://github.com/xwiki-contrib/docker-xwiki/tree/master/template instead? And to release it in the official xwiki images?

For that I guess we would need to talk to the official repo guys to add something similar to what we do for the xwiki image at https://github.com/docker-library/official-images/blob/master/library/xwiki

[Mario-Hofstaetter]

Thanks @Mario-Hofstaetter. What about locating the new dockerfile for SOLR in https://github.com/xwiki-contrib/docker-xwiki/tree/master/template instead? And to release it in the official xwiki images?

For that I guess we would need to talk to the official repo guys to add something similar to what we do for the xwiki image at https://github.com/docker-library/official-images/blob/master/library/xwiki

Do as you wish, maybe I need to take a look how this templating works.

[vmassol]

Superseded by #22