Merge branch '90-network' into 'master'

Adding network config for sysctl

See merge request hpc-team/ansible_cluster_in_a_box!267

Former-commit-id: ae7561ea

roles/sysctl_network/files/90-network.conf

+net.ipv4.tcp_max_syn_backlog=30000
+net.ipv4.conf.all.accept_redirects=0
+net.ipv4.udp_rmem_min=8192
+net.ipv4.tcp_congestion_control=htcp
+net.core.default_qdisc=fq_codel
+net.ipv4.tcp_rmem=4096  87380   33554432
+net.ipv4.tcp_tw_recycle=1
+net.ipv4.tcp_tw_reuse=1
+net.core.optmem_max=4194304
+net.ipv4.tcp_slow_start_after_idle=0
+net.core.wmem_max=33554432
+net.ipv4.conf.all.send_redirects=0
+net.core.netdev_budget=600
+net.ipv4.tcp_fack=1
+net.netfilter.nf_conntrack_max=1024000
+net.ipv4.tcp_fastopen=1
+net.ipv4.conf.all.log_martians=0
+net.core.netdev_max_backlog=50000
+net.ipv4.tcp_ecn=1
+net.ipv4.tcp_timestamps=1
+net.ipv4.tcp_mtu_probing=1
+net.ipv4.tcp_wmem=4096  65536   33554432
+net.nf_conntrack_max=1024000
+net.core.somaxconn=1024
+net.ipv4.tcp_fin_timeout=10
+net.ipv4.tcp_sack=1
+kernel.pid_max=4194303
+net.core.rmem_max=33554432
+net.ipv4.udp_wmem_min=8192
+net.ipv4.tcp_dsack=1

roles/sysctl_network/handlers/main.yml

+- name: reload sysctl
+  sysctl:
+    reload: yes 

roles/sysctl_network/tasks/main.yml

+---
+- name: copying networking config for sysctl
+  copy:
+    mode: '640'
+    src:  90-network.conf
+    dest: '/etc/sysctl.d'
+  become: true
+  become_user: root
+
+
+- name: Reloading sysctl
+  notify:
+    - "reload sysctl"
+  become: true
+  become_user: root
+
+