ingress-nginx-helm/docs/examples/customization/sysctl/patch.json

{
	"spec": {
		"template": {
			"spec": {
				"initContainers": [{
					"name": "sysctl",
					"image": "alpine:3.13",
					"securityContext": {
						"privileged": true
					},
					"command": ["sh", "-c", "sysctl -w net.core.somaxconn=32768; sysctl -w net.ipv4.ip_local_port_range='1024 65000'"]
				}]
			}
		}
	}
}