路由通告服务：radvd

为什么需要 radvd ？

如果你使用主路由方案，宽带也支持 IPv6，且希望家里的设备也都使用 IPv6，那就需要在主路由上部署 radvd 作为路由通告服务，类似 IPv4 的 DHCP 服务，为内网设备分配 IPv6 地址。

编译 radvd 镜像

Dockerfile 示例：

Dockerfile

FROM ubuntu:22.04
RUN apt update -y
RUN apt install -y radvd
ENTRYPOINT ["/usr/sbin/radvd", "--config", "/etc/radvd.d/radvd.conf", "--logmethod", "stderr_clean", "--nodaemon"]

目录结构

radvd
├── Dockerfile
├── config
│   └── radvd.conf
├── daemonset.yaml
└── kustomization.yaml

准备 radvd.conf

config/radvd.conf

interface enp2s0 {
  # 网卡启用路由通告(RA)
  AdvSendAdvert on;
  # 启用 Home Agent(iOS、macOS等移动设备加入网络时发送Home Agent请求获取ipv6信息）
  AdvHomeAgentFlag on;
  AdvHomeAgentInfo on;
  MinRtrAdvInterval 10;
  MaxRtrAdvInterval 60;
  prefix fddd:dddd:dddd:dddd::2/64 {
    AdvOnLink on;
    AdvAutonomous on;
    AdvRouterAddr on;
  };
  route fddd:dddd:dddd:dddd::2/64 {
    AdvRoutePreference high;
    AdvRouteLifetime 3600;
    RemoveRoute off;
  };
};

准备 daemonset.yaml

config/radvd.yaml

apiVersion: apps/v1
kind: DaemonSet
metadata:
  labels:
    app: radvd
  name: radvd
  namespace: default
spec:
  selector:
    matchLabels:
      app: radvd
  template:
    metadata:
      labels:
        app: radvd
    spec:
      initContainers:
        - image: imroc/radvd:2.18
          imagePullPolicy: IfNotPresent
          name: sysctl
          securityContext:
            privileged: true
          command:
            - sh
            - -c
            - |
              sysctl -w net.ipv6.conf.all.accept_ra_rt_info_max_plen=128
              sysctl -w net.ipv6.conf.default.accept_ra_rt_info_max_plen=128
              sysctl -w net.ipv6.conf.all.forwarding=1
              sysctl -w net.ipv6.conf.default.forwarding=1
      containers:
        - image: imroc/radvd:2.18
          imagePullPolicy: IfNotPresent
          name: radvd
          securityContext:
            privileged: true
          args: ["--debug", "5"]
          volumeMounts:
            - mountPath: /etc/radvd.d
              name: radvd-config
      hostNetwork: true
      restartPolicy: Always
      volumes:
        - configMap:
            name: radvd-config
          name: radvd-config
  updateStrategy:
    rollingUpdate:
      maxSurge: 0
      maxUnavailable: 1
    type: RollingUpdate

• 使用 initContainer 自动修改内核参数以启用 IPv6 转发和接收路由通告（拨号的网卡通过路由通告接收来自运营商分配的 IPv6 地址）。

准备 kustomization.yaml

kustomization.yaml

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization

resources:
  - daemonset.yaml

namespace: default

configMapGenerator:
  - name: radvd-config
    files:
      - config/radvd.conf