add sysctl parameter "net.ipv4.tcp_tw_reuse"

tcp_tw_reuse sets whether TCP should reuse an existing connection in the TIME-WAIT state for a new outgoing connection if the new timestamp is strictly bigger than the most recent timestamp recorded for the previous connection.

Reuse time-wait sockets in cases where the protocol considers it safe. This helps avoid from running out of available network sockets.

Author: vitabaks

vars/system.yml

@@ -56,6 +56,7 @@ sysctl_conf:
     - {name: "net.core.netdev_max_backlog", value: "10000"}
     - {name: "net.ipv4.tcp_max_syn_backlog", value: "8192"}
     - {name: "net.core.somaxconn", value: "65535"}
+    - {name: "net.ipv4.tcp_tw_reuse", value: "1"}
 #    - {name: "", value: ""}
   balancers:
     - {name: "net.ipv4.ip_nonlocal_bind", value: "1"}
@@ -65,6 +66,7 @@ sysctl_conf:
     - {name: "net.core.netdev_max_backlog", value: "10000"}
     - {name: "net.ipv4.tcp_max_syn_backlog", value: "8192"}
     - {name: "net.core.somaxconn", value: "65535"}
+    - {name: "net.ipv4.tcp_tw_reuse", value: "1"}
 #    - {name: "", value: ""}