Refresh k8s docker versions and references

21_case_devops/21.7_practical_examples.md

@@ -171,7 +171,7 @@ RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
     -o app .
 
 # 最终镜像
-FROM alpine:3.17
+FROM alpine:3.21
 
 RUN apk add --no-cache ca-certificates tzdata
 
@@ -233,7 +233,7 @@ name = "rust-app"
 path = "src/main.rs"
 
 [dependencies]
-actix-web = "4.4"
+actix-web = "4.13"
 tokio = { version = "1.35", features = ["full"] }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
@@ -242,7 +242,7 @@ serde_json = "1.0"
 
 ```dockerfile
 # Stage 1: 编译
-FROM rust:1.75-alpine AS builder
+FROM rust:1.95-alpine AS builder
 
 RUN apk add --no-cache musl-dev
 
@@ -255,7 +255,7 @@ COPY src ./src
 RUN cargo build --release
 
 # Stage 2: 运行镜像
-FROM alpine:3.17
+FROM alpine:3.21
 
 RUN apk add --no-cache ca-certificates
 
@@ -499,7 +499,7 @@ binlog_format = ROW
 #### Redis 缓存部署
 
 ```dockerfile
-FROM redis:7-alpine
+FROM redis:8-alpine
 
 # 复制 Redis 配置
 COPY redis.conf /usr/local/etc/redis/redis.conf
@@ -632,7 +632,7 @@ services:
 
   # Redis 缓存
   redis:
-    image: redis:7-alpine
+    image: redis:8-alpine
     container_name: redis
     command: redis-server --appendonly yes --requirepass redispass
     volumes:
@@ -848,7 +848,7 @@ services:
       - postgres_data:/var/lib/postgresql/data
 
   redis:
-    image: redis:7-alpine
+    image: redis:8-alpine
 
 volumes:
   postgres_data: