Changing "vm.max_map_count" sysctl conf in a node does not work

To launch an ELK stack, the “vm.max_map_count” (/etc/sysctl.conf) parameter must be set to at least “262144” as mentionned in the documentation. But the command to change it does not seem to work in PWD nodes :

[node1] (local) root@192.168.0.53 ~/swarm-elk
$ sysctl -w vm.max_map_count=262144

[node1] (local) root@192.168.0.53 ~/swarm-elk
$ sysctl vm.max_map_count
vm.max_map_count = 65530

Without this parameter set to 262144, elastic container does not start and logs the following error :

ERROR: [1] bootstrap checks failed
myself_elasticsearch.1.zbqincb3vovv@node1    | [1]: max virtual memory areas vm.max_map_count [65530] is too low, increaseto at least [262144]

I think it must have been worked before because some tutorial indicates so. For example : http://collabnix.com/test-drive-elasticsearch-logstash-kibana-on-pwd-platform-running-docker-17-06-ce-swarm-mode-in-5-minutes/

Is it a regression or it this another way to change this option ?

Thank you for your help

[marcosnils]

@yogeek fixed. I haven’t applied the change in the base PWD image and the server got recycled recently. That’s why changes got discarded. I’ll try to make it permanently soon.

Apologize for the inconvenience

[marcosnils]

@jangaraj fixed!.