Bug: vm.max_map_count is not set to 262144 when using Systemd service

[nareen2]

Hi,

I used this cookbook to deploy 3-node Elasticsearch cluster[Version 5.6.3] on Redhat platform. I've defined node['elasticsearch']['configure']['max_map_count'] to 262144 and used Systemd to configure the service, but the service is failing with:

[1] bootstrap checks failed
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144].

I had to manually run `sysctl to increase that. Can you please take a look and let me know if I miss some configuration to set that value?

[martinb3]

Hi there -- I believe systemd doesn't respect the settings in /etc/sysconfig/elasticsearch or /etc/default/elasticsearch. You're welcome to follow these instructions to override settings there.

Eventually Elasticsearch is going to stop supporting as many environment variables for these sorts of settings, which will mean that we'll probably have to take an alternate approach.