Docker simplification

[markpatton]

This is a big change.

The docker configuration has been simplified. Now there is just a modified tomcat container which also does initialization (lutece-init 0.7) and a MySQL container. The Tomcat being used now is Tomcat 9 with OpenJdk 8 instead of Tomcat 8 with OpenJdk 8. In addition MySQL 8 client tools are used for greater compatibility.

The production docker support has been removed because it will now be handled by building custom images based on lutece-init.

[jrmartino]

I cloned this repo and used the lutece_init_0,7 branch, In order to test I first had to get database init working by pulling in the database init structure missing in the Paris lutece-core develop branch from the master branch there. After I verified that I was able to init a database ...

I tried removing the lutece.sql file from the data directory, and pruning the database volume. docker-compose up then correctly generated the database from the war. I then pruned the volume and put the lutece.sql dump into he data directory - docker-compose up found the dump and populated the database. Finally, I pruned the volume and deleted the mysql image. docker-compose up constructed the mysql image and populated it with the dump. Everything worked perfectly.

The only issue I saw - not related to this PR - was in dumping the database. For some unknown reason, stderr seemed to be merged with stdout - so that initially, loading the dump failed because the first line of lutece.sql was this (dump command was docker exec -it mysql mysqldump -u <user> -p<password> lutece > lutece.sql):

mysqldump: [Warning] Using a password on the command line interface can be insecure.

this will probably not be an issue in production, just something to be aware of. this hack works:

docker exec -it mysql mysqldump -u <user> -p<password> lutece 2>&1 | grep -v 'mysqldump: \[Warning\]' > lutece.sql

[markpatton]

The container uses a Maria db command line tools instead of MySQL tools. It may be worth switching to the official MySQL 8 client.

[markpatton]

Switched the container to use MySQL 8 client tools. Seems less spammy.