From 57c63ceb0452afba5018512e30fe16d8f0758a4e Mon Sep 17 00:00:00 2001
From: roc <roc@imroc.cc>
Date: Thu, 7 Mar 2024 12:01:06 +0800
Subject: [PATCH] update at 2024-03-07 12:01:06

---
 codeblock/home-network/ddns.yaml      | 40 ++++++++++++++++
 content/cases/home-network/ddns.md    | 66 +++++++++++++++++++++++++++
 content/cases/home-network/dnsmasq.md |  2 +-
 3 files changed, 107 insertions(+), 1 deletion(-)
 create mode 100644 codeblock/home-network/ddns.yaml
 create mode 100644 content/cases/home-network/ddns.md

diff --git a/codeblock/home-network/ddns.yaml b/codeblock/home-network/ddns.yaml
new file mode 100644
index 0000000..173a0a9
--- /dev/null
+++ b/codeblock/home-network/ddns.yaml
@@ -0,0 +1,40 @@
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  labels:
+    app: ddns
+  name: ddns
+  namespace: default
+spec:
+  selector:
+    matchLabels:
+      app: ddns
+  template:
+    metadata:
+      labels:
+        app: ddns
+    spec:
+      terminationGracePeriodSeconds: 1
+      containers:
+        - image: newfuture/ddns:v2.13.3
+          imagePullPolicy: IfNotPresent
+          name: ddns
+          securityContext:
+            privileged: true
+          volumeMounts:
+            - mountPath: /config.json
+              subPath: config.json
+              name: config
+      dnsPolicy: Default
+      hostNetwork: true
+      restartPolicy: Always
+      volumes:
+        - configMap:
+            name: ddns-config
+          name: config
+  updateStrategy:
+    rollingUpdate:
+      maxSurge: 0
+      maxUnavailable: 1
+    type: RollingUpdate
+
diff --git a/content/cases/home-network/ddns.md b/content/cases/home-network/ddns.md
new file mode 100644
index 0000000..b719305
--- /dev/null
+++ b/content/cases/home-network/ddns.md
@@ -0,0 +1,66 @@
+# DDNS
+
+## 为什么需要 DDNS 服务
+
+如果希望从外面通过 ssh 远程登录家里的路由器，或者通过 VPN 连上家里的内网，就需要知道家里的公网 IP 地址，而公网 IP 地址每次拨号都会变(比如断点或重启路由器就会重新拨号)，所以需要一个 DDNS 服务来自动修改 DNS 解析，指向当前家里的公网 IP 地址。
+
+## 告知运营商开通固定 IP
+
+目前我知道的只有电信的宽带支持独占 IP（固定 IP）， 即拨号后分配的公网 IP 只有你一家在用，不是多家共享。只有开通了这个固定 IP 功能，你才能从外面通过公网地址连上家里，需要打电话给运营商（电信是 10000），通过人工服务，让客户给开通，理由就说家里有许多智能家居设备（比如摄像头），有从外网连上家里网络的需求。
+
+
+## DDNS 开源项目
+
+本文部署的 DDNS 服务使用这个开源项目：https://github.com/NewFuture/DDNS
+
+## 目录结构
+
+```txt
+ddns
+├── config
+│   └── config.json
+├── daemonset.yaml
+└── kustomization.yaml
+```
+
+## 准备 DDNS 配置
+
+```json showLineNumbers title="config/config.json"
+{
+    "$schema": "https://ddns.newfuture.cc/schema/v2.8.json",
+    "debug": false,
+    "dns": "dnspod",
+    "id": "******",
+    "token": "********************************",
+    "index4": "shell:ip -4 addr show ppp0 scope global | awk '/inet/{print $2}' | awk -F '/' '{print $1}'",
+    "ipv4": [
+        "home.imroc.cc"
+    ],
+    "proxy": null,
+    "ttl": null
+}
+```
+
+* 我的域名在 DNSPod 管理，所以配置的是 DNSPod 的 id 和 token。
+* 我用的主路由方案，所以获取公网 IP 的方法直接读 `ppp0` 网卡上的公网 IP 地址就行，不需要调外部接口获取。
+
+## 准备 daemonset.yaml
+
+<FileBlock showLineNumbers title="daemonset.yaml" file="home-network/ddns.yaml" />
+
+## 准备 kustomization.yaml
+
+```yaml
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - daemonset.yaml
+
+configMapGenerator:
+  - files:
+      - config/config.json
+    name: ddns-config
+
+namespace: default
+```
diff --git a/content/cases/home-network/dnsmasq.md b/content/cases/home-network/dnsmasq.md
index e5a37e3..6698ddc 100644
--- a/content/cases/home-network/dnsmasq.md
+++ b/content/cases/home-network/dnsmasq.md
@@ -24,7 +24,7 @@ dnsmasq
 
 ## 准备 daemonset.yaml
 
-<FileBlock showLineNumbers title="daemonset.yaml" file="home-network/daemonset.yaml" />
+<FileBlock showLineNumbers title="daemonset.yaml" file="home-network/dnsmasq.yaml" />
 
 ## 准备 kustomization.yaml