#157 Add OS tunning

CHANGELOG.md

@@ -2,6 +2,8 @@
 All notable changes to this project will be documented in this file.
 
 ## [Unreleased](https://github.com/idealista/solr_role/tree/develop)
+- *[#157](https://github.com/idealista/solr_role/issues/157) Add OS tunning* @MarioNv91
+
 ## [3.0.4](https://github.com/idealista/solr_role/tree/3.0.3) (2022-06-13)
 ### Fixed
 - *[#154](https://github.com/idealista/solr_role/issues/154) fix task with tag solr_collections running on all hosts when the play set the batch size with serial 1* @ajiang

defaults/main.yml

@@ -6,6 +6,37 @@ solr_install: true
 solr_mode: cloud  # standalone|cloud
 solr_auto_add_replicas: true
 
+## OS Tunning options
+
+solr_os_tunning: true
+
+# pam_limits
+solr_nofile_limit: 65535
+solr_nproc_limit: 65535
+
+# network
+solr_sysctl_required_packages:
+  - procps
+
+solr_sysctl_properties:
+ - name: net.core.rmem_max
+   value: 16777216
+ - name: net.core.wmem_max
+   value: 16777216
+ - name: net.core.somaxconn
+   value: 4096
+ - name: net.core.netdev_max_backlog
+   value: 16384
+ - name: net.ipv4.tcp_max_syn_backlog
+   value: 8192
+ - name: net.ipv4.tcp_syncookies
+   value: 1
+ - name: vm.max_map_count
+   value: 262144
+
+# swap
+solr_disable_swap: true
+
 ## Service options
 
 # Owner

molecule/default/group_vars/solrcloud/main.yml

@@ -48,3 +48,4 @@ solr_agents_config:
 solr_environment_ui: "test,label=Molecule+test,color=green"
 solr_mode: cloud
 solr_collections_clean_house: false
+solr_os_tunning: false

tasks/main.yml

@@ -1,5 +1,11 @@
 ---
 
+- name: Solr | OS Tunning
+  import_tasks: os-tunning.yml
+  tags:
+    - solr_tunning
+  when: solr_os_tunning
+
 - name: Solr | Install
   import_tasks: install.yml
   tags:

tasks/os-tunning.yml

@@ -0,0 +1,57 @@
+---
+
+- name: TUNNING | Install required packages
+  apt:
+    pkg: "{{ item }}"
+    state: present
+  with_items: "{{ solr_sysctl_required_packages }}"
+  when: solr_sysctl_required_packages is defined
+
+- name: TUNNING | Apply sysctl settings
+  sysctl:
+    name: "{{ item.name }}"
+    value: "{{ item.value }}"
+    sysctl_set: yes
+    state: present
+  with_items: "{{ solr_sysctl_properties }}"
+  when: solr_sysctl_properties is defined
+
+- name: TUNNING | Set to {{ solr_nofile_limit }} the nofile limit
+  pam_limits:
+    domain: '*'
+    limit_type: soft
+    limit_item: nofile
+    value: "{{ solr_nofile_limit }}"
+  register: ulimit
+  when: solr_nofile_limit is defined
+
+- name: TUNNING | Set to {{ solr_nproc_limit }} the nproc limit
+  pam_limits:
+    domain: '*'
+    limit_type: soft
+    limit_item: nproc
+    value: "{{ solr_nproc_limit }}"
+  register: ulimit
+  when: solr_nproc_limit is defined
+
+- name: TUNNING | Reboot host if ulimit changed
+  shell: sleep 10 && shutdown -r now
+  async: 1
+  poll: 0
+  ignore_errors: true
+  when: ulimit.changed
+
+- name: TUNNING | Wait for connection
+  wait_for_connection:
+
+- name: TUNNING | Disable SWAP (1/2)
+  shell: |
+    swapoff -a
+  when: solr_disable_swap
+
+- name: TUNNING | Disable SWAP in fstab (2/2)
+  replace:
+    path: /etc/fstab
+    regexp: '^([^#].*?\sswap\s+sw\s+.*)$'
+    replace: '# \1'
+  when: solr_disable_swap