playbook: Setup limits

For now nofile hard limit is set to 1048576.

/reviewed-on nexedi/slapos.package!104

playbook/roles/vifib-server/files/slapos_limit.conf

+root             hard    nofile          1048576

playbook/roles/vifib-server/tasks/main.yml

@@ -24,7 +24,7 @@
   - include: shuttle-modprobe.yml
 
   - name: Increase ulimit
-    shell: echo "TODO"
+    copy: src="slapos_limit.conf" dest="/etc/security/limits.d/slapos.conf" mode=0644 owner=root group=root
 
   - name: Set Cron
     cron: name="Launch Startup with ansible" special_time=reboot job='cd /opt/upgrader/playbook && ansible-playbook vifib-startup.yml -i hosts 2>>/opt/upgrader/startup.log >> /opt/upgrader/startup.log'