chef role sysctl config

chef-sysctl

{  
  "default_attributes": {
    "sysctl": {
      "params": {
        "fs": {
          "file-max": "100000"
        },
        "net": {
          "ipv4": {
            "ip_local_port_range": "11000 65000",
            "tcp_max_syn_backlog": "30000",
            "tcp_max_tw_buckets": "2000000",
            "tcp_tw_reuse": "1",
            "tcp_fin_timeout": "15",
            "tcp_slow_start_after_idle": "0",
            "tcp_keepalive_time": "900",
            "tcp_window_scaling": "1",
            "tcp_timestamps": "1",
            "tcp_sack": "0",
            "tcp_syncookies": "1"
          },
          "core": {
            "somaxconn": "4096",
            "netdev_max_backlog": "25000"
          }
        },
        "vm": {
          "swappiness": "10",
          "oom_kill_allocating_task": "0"
        }
      }
    }
  }
}