Merge pull request #2879 from edx/OPS-728

Increasing file descriptor limit (OPS-728)

playbooks/roles/locust/defaults/main.yml

@@ -56,3 +56,16 @@ locust_debian_pkgs:
   - gfortran
 
 locust_redhat_pkgs: []
+
+# ulimit variables
+ulimit_config:
+  - domain: '*'
+    type: soft
+    item: nofile
+    value: 4096
+  - domain: '*'
+    type: hard
+    item: nofile
+    value: 4096
+
+ulimit_conf_file: "/etc/security/limits.conf"

playbooks/roles/locust/tasks/main.yml

@@ -72,3 +72,9 @@
     name={{ locust_service_name }}
   when: not disable_edx_services
   sudo_user: "{{ supervisor_service_user }}"
+
+- name: increase file descriptor limit of the system (Session Logout and Login would be required)
+  lineinfile:
+    dest: "{{ ulimit_conf_file }}"
+    line: "{{ item.domain }}  {{ item.type }}  {{ item.item }}  {{ item.value }}"
+  with_items: "{{ ulimit_config }}"