machine:
  nodeLabels:
    topology.kubernetes.io/region: ${cluster_name}
    topology.kubernetes.io/zone: ${node_name}
  network:
    hostname: ${hostname}
    interfaces:
      - deviceSelector:
          hardwareAddr: ${mac_address}
        addresses:
          - ${ip}/${subnet_mask}
        routes:
          - network: 0.0.0.0/0
            gateway: ${gateway}
        dhcp: false
%{ if vip != null }
        vip:
          ip: ${vip}
%{ endif }
  sysctls:
    fs.inotify.max_user_watches: 1048576   # Watchdog
    fs.inotify.max_user_instances: 8192    # Watchdog
    net.core.default_qdisc: fq             # 10Gb/s
    net.core.rmem_max: 67108864            # 10Gb/s | Cloudflared / QUIC
    net.core.wmem_max: 67108864            # 10Gb/s | Cloudflared / QUIC
    net.ipv4.tcp_congestion_control: bbr   # 10Gb/s
    net.ipv4.tcp_fastopen: 3               # Send and accept data in the opening SYN packet
    net.ipv4.tcp_mtu_probing: 1            # 10Gb/s | Jumbo frames
    net.ipv4.tcp_rmem: 4096 87380 33554432 # 10Gb/s
    net.ipv4.tcp_wmem: 4096 65536 33554432 # 10Gb/s
    net.ipv4.tcp_window_scaling: 1         # 10Gb/s
    vm.nr_hugepages: 1024                  # PostgreSQL