How do I set ulimit for containers in Kubernetes?

Question

How do I set ulimit for containers in Kubernetes? (specifically ulimit -u)

Answer 1

Above all not working for me.

I done the following (it works on ubuntu:18.04 and centos/7):

sudo nano /usr/lib/systemd/system/docker.service

Added

--default-ulimit memlock=-1:-1

To line

ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

This line must looks like:

ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --default-ulimit memlock=-1:-1

And then you MUST reload rightly: firstly run command

sudo systemctl daemon-reload

And then run command

sudo systemctl restart docker.service

To check work it or not works, run command

docker run busybox:1.28 cat /proc/1/limits

You must see unlimited max lock memory like about this:

...
Max locked memory         unlimited            unlimited            bytes
...

And elasticsearch starts to work!!!!