[BUG] memory locking requested for opensearch process but memory is not locked

[iwikus]

Describe the bug
[ERROR][o.o.b.Bootstrap ] [] node validation exception
[1] bootstrap checks failed
[1]: memory locking requested for opensearch process but memory is not locked

To Reproduce
Switch to production usage (bind to non-localhost ip)
Bootstrap checks fails, because systemd unit file is missing

LimitMEMLOCK=infinity

Expected behavior
Service will start without editing systemd unit file.

Plugins
N/A

Screenshots

Host/Environment (please complete the following information):

• OS: ubuntu
• Version 20.04

Additional context

[Sir-HatX]

Whats the work around for this error ?

[adrian-arapiles]

Whats the work around for this error ?

Until they fix that, if you are using systemd, you can create your own file on (in debian) /etc/systemd/system/opensearch.service.d/whatever.conf
with

LimitMEMLOCK=infinity

to apply additional config to opensearch.service.
Any drop file on /etc/systemd/system/opensearch.service.d is applied after default .service

[pitch-d]

in above override of default .service you should specify that it's a service

[Service]
LimitMEMLOCK=infinity

as default /usr/lib/systemd/system/opensearch.service ends with

[Install]
WantedBy=multi-user.target

and also, don't forget to run systemctl daemon-reload before restarting service