nginx-ingress-patch.json

{
	"spec": {
		"template": {
			"spec": {
				"initContainers": [{
					"name": "sysctl",
					"image": "alpine:3.10",
					"securityContext": {
						"privileged": true
					},
					"command": [
						"sh",
						"-c",
						"sysctl -w net.core.somaxconn=32768; sysctl -w net.ipv4.ip_local_port_range='1024 65000'; sysctl -w net.ipv4.tcp_max_syn_backlog=1024"
					]
				}]
			}
		}
	}
}