Elasticsearch 5.0 doesn't work without host mod, use 2.x

[BretFisher]

elasticsearch 5 crashes with: elasticsearch "max virtual memory areas" too low vm.max_map_count. Fix for now to stick with 5.0 seems to be:

sudo sysctl -w vm.max_map_count=262144 re: docker-library/elasticsearch#98 (comment)

Workaround I'd recommend for this workshop for now: change cmd to pull es 2 from slide 69:

docker service create --name search --publish 9200:9200 --replicas 7 \ elasticsearch:2

[jpetazzo]

Yep, already fixed in the lisa branch (where I'm staging changes and will merge them just after mentor week). Thanks a lot for reporting, though!