Add k3s cluster expansion documentation and scripts

- Complete expansion guide for 2/4/6 node scenarios
- Quick join scripts for worker and master nodes
- Health check and diagnostic scripts
- Quick reference card for common operations

k3s/argocd-ingress.yaml

@@ -6,8 +6,8 @@ metadata:
   annotations:
     cert-manager.io/cluster-issuer: letsencrypt-prod
     traefik.ingress.kubernetes.io/router.entrypoints: websecure
-    nginx.ingress.kubernetes.io/ssl-passthrough: "true"
-    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
+    traefik.ingress.kubernetes.io/service.serversscheme: https
+    traefik.ingress.kubernetes.io/service.serverstransport: insecure@file
 spec:
   tls:
   - hosts:

k3s/my-blog/02-wordpress.yaml

@@ -5,6 +5,10 @@ metadata:
   name: wordpress-service
   namespace: demo-space
 spec:
+  sessionAffinity: ClientIP
+  sessionAffinityConfig:
+    clientIP:
+      timeoutSeconds: 10800  # 3 hours
   ports:
   - port: 80
   selector:
@@ -48,6 +52,9 @@ spec:
             }
             /* Force SSL for admin */
             define('FORCE_SSL_ADMIN', true);
+            /* Redis session storage for multi-replica support */
+            @ini_set('session.save_handler', 'redis');
+            @ini_set('session.save_path', 'tcp://redis-service:6379');
             /* Fix cookie issues */
             @ini_set('session.cookie_httponly', true);
             @ini_set('session.cookie_secure', true);

k3s/my-blog/03-ingress.yaml

@@ -9,6 +9,9 @@ metadata:
   annotations:
     # ▼▼▼ 关键注解：我要申请证书 ▼▼▼
     cert-manager.io/cluster-issuer: letsencrypt-prod
+    # ▼▼▼ Traefik sticky session 配置 ▼▼▼
+    traefik.ingress.kubernetes.io/affinity: "true"
+    traefik.ingress.kubernetes.io/session-cookie-name: "wordpress-session"
 spec:
   rules:
   - host: blog.u9.net3w.com  # 您的域名

k3s/my-blog/04-redis.yaml

@@ -0,0 +1,40 @@
+# 04-redis.yaml - Redis for WordPress session storage
+apiVersion: v1
+kind: Service
+metadata:
+  name: redis-service
+  namespace: demo-space
+spec:
+  ports:
+  - port: 6379
+    targetPort: 6379
+  selector:
+    app: redis
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: redis
+  namespace: demo-space
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: redis
+  template:
+    metadata:
+      labels:
+        app: redis
+    spec:
+      containers:
+      - name: redis
+        image: redis:7-alpine
+        ports:
+        - containerPort: 6379
+        resources:
+          requests:
+            memory: "64Mi"
+            cpu: "100m"
+          limits:
+            memory: "128Mi"
+            cpu: "200m"

k3s/my-blog/Dockerfile

@@ -0,0 +1,8 @@
+# Custom WordPress image with Redis PHP extension
+FROM wordpress:latest
+
+# Install Redis PHP extension
+RUN pecl install redis && docker-php-ext-enable redis
+
+# Verify installation
+RUN php -m | grep redis