SpringCloud项目迁移到k8s集群

十八岁2026-08-012026-08-01

SpringCloud项目迁移到k8s集群

一、项目迁移需求分析

现有一个SpringCloud项目需要迁移至Kubernetes，该项目采用Eureka注册中心，并采用前后端分离框架。该项目首页域名为demo.test.com，域名的主路径/转发至项目的前端，路径/receiveapi转发至网关服务，其他服务注册至Eureka，由网关服务进行流量转发。

1.1迁移Eureka集群

1.1.1代码构建及容器化

代码地址：https://gitee.com/liujunweipy/demo-eureka

构建命令：mvn clean package

Java 版本：jdk 1.8

构建镜像：registry.cn-beijing.aliyuncs.com/k8s-liujunwei/maven:3.5.3

下载源代码：

# 下载代码
[root@k8s-master01 18-SpringCloud]# git clone https://gitee.com/liujunweipy/demo-eureka.git
Cloning into 'demo-eureka'...
remote: Enumerating objects: 24, done.
remote: Counting objects: 100% (24/24), done.
remote: Compressing objects: 100% (15/15), done.
remote: Total 24 (delta 6), reused 24 (delta 6), pack-reused 0 (from 0)
Receiving objects: 100% (24/24), 6.82 KiB | 2.27 MiB/s, done.
Resolving deltas: 100% (6/6), done.

执行构建：

#  把maven构建所依赖的插件持久化
[root@k8s-master01 18-SpringCloud]# mkdir -p /data/m2

# 运行一个maven临时容器进行代码的构建
# --rm: 自动清理。这意味退出容器后，Docker 会自动删除这个容器实例。这非常适合临时性的任务。
# -v:s 数据卷挂载，将宿主机的目录挂载到容器内，把宿主机`pwd`/demo-eureka目录挂载到容器的/mnt，把宿主机的/data/m2目录挂载到容器的/root/.m2目录。
# bash: 这是容器启动后立即执行的命令。它覆盖了镜像默认的 CMD 或 ENTRYPOINT。

[root@k8s-master01 18-SpringCloud]# docker run -ti --rm -v  `pwd`/demo-eureka:/mnt -v /data/m2:/root/.m2 registry.cn-beijing.aliyuncs.com/k8s-liujunwei/maven:3.5.3  bash
Unable to find image 'registry.cn-beijing.aliyuncs.com/k8s-liujunwei/maven:3.5.3' locally
3.5.3: Pulling from k8s-liujunwei/maven
cc1a78bfd46b: Pull complete
d2c05365ee2a: Pull complete
231cb0e216d3: Pull complete
3d2aa70286b8: Pull complete
276ddd61a47b: Pull complete
2c60f2a0b551: Pull complete
4abbe5585c9b: Pull complete
aaeb39f0b473: Pull complete
a1ec96bfaf16: Pull complete
16d38ec4eb12: Pull complete
ff6759072b35: Pull complete
37a68c3b1fc7: Pull complete
Digest: sha256:d5c6b61f886178a925283918ac8984f963d279c9a3fdae813d6fc462fef1899c
Status: Downloaded newer image for registry.cn-beijing.aliyuncs.com/k8s-liujunwei/maven:3.5.3
root@70830096ac9f:/#

#进入到代码目录执行构建命令
root@70830096ac9f:/# cd /mnt/
root@70830096ac9f:/mnt# mvn clean package
Downloading from central: https://repo.maven.apache.org/maven2/com/google/guava/guava/19.0/guava-19.0.jar
Downloaded from central: https://repo.maven.apache.org/maven2/org/ow2/asm/asm-util/7.0-beta/asm-util-7.0-beta.jar (81 kB at 3.5 kB/s)
Downloaded from central: https://repo.maven.apache.org/maven2/org/jdom/jdom2/2.0.6/jdom2-2.0.6.jar (305 kB at 11 kB/s)
Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/maven-model/3.3.9/maven-model-3.3.9.jar (164 kB at 5.6 kB/s)
Downloaded from central: https://repo.maven.apache.org/maven2/org/vafer/jdependency/2.1.1/jdependency-2.1.1.jar (186 kB at 6.0 kB/s)
Downloaded from central: https://repo.maven.apache.org/maven2/com/google/guava/guava/19.0/guava-19.0.jar (2.3 MB at 42 kB/s)
[INFO] Replacing main artifact with repackaged archive
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 23:18 min
[INFO] Finished at: 2025-12-14T07:41:21Z
[INFO] ------------------------------------------------------------------------

查看构建后的产物：

# 构建完成后会在target目录中产生一个jar包，
root@70830096ac9f:/mnt# ls -l
total 12
-rw-r--r-- 1 root root  856 Dec 14 06:56 README.en.md
-rw-r--r-- 1 root root  945 Dec 14 06:56 README.md
-rw-r--r-- 1 root root 2399 Dec 14 06:56 pom.xml
drwxr-xr-x 3 root root   18 Dec 14 06:56 src
drwxr-xr-x 6 root root  189 Dec 14 07:41 target
root@70830096ac9f:/mnt# cd target/
root@70830096ac9f:/mnt/target# ls -l
total 46080
drwxr-xr-x 3 root root       86 Dec 14 07:37 classes
drwxr-xr-x 3 root root       25 Dec 14 07:37 generated-sources
drwxr-xr-x 2 root root       28 Dec 14 07:39 maven-archiver
drwxr-xr-x 3 root root       35 Dec 14 07:37 maven-status
-rw-r--r-- 1 root root 47179265 Dec 14 07:41 spring-cloud-eureka-0.0.1-SNAPSHOT.jar
-rw-r--r-- 1 root root     3964 Dec 14 07:39 spring-cloud-eureka-0.0.1-SNAPSHOT.jar.original

#因为做了目录映射，所以在宿主机的/root/18-SpringCloud/demo-eureka/target也有相同的文件
[root@k8s-master01 target]# ll
total 46080
drwxr-xr-x 3 root root       86 Dec 14 15:37 classes
drwxr-xr-x 3 root root       25 Dec 14 15:37 generated-sources
drwxr-xr-x 2 root root       28 Dec 14 15:39 maven-archiver
drwxr-xr-x 3 root root       35 Dec 14 15:37 maven-status
-rw-r--r-- 1 root root 47179265 Dec 14 15:41 spring-cloud-eureka-0.0.1-SNAPSHOT.jar
-rw-r--r-- 1 root root     3964 Dec 14 15:39 spring-cloud-eureka-0.0.1-SNAPSHOT.jar.original

用spring-cloud-eureka-0.0.1-SNAPSHOT.jar制作镜像：

# 进入项目目录
[root@k8s-master01 18-SpringCloud]# cd demo-eureka/ 

#准备Dockerfile
[root@k8s-master01 demo-eureka]# cat Dockerfile  
FROM registry.cn-beijing.aliyuncs.com/k8s-liujunwei/openjdk:8u111-jdk
WORKDIR /home/app
COPY target/*.jar ./app.jar
CMD ["java", "-jar", "app.jar"]

# 制作镜像
[root@k8s-master01 demo-eureka]# docker build -t registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-eureka:v0.0.1 .

#查看制作好的镜像
[root@k8s-master01 demo-eureka]# docker images
REPOSITORY                                                       TAG       IMAGE ID       CREATED              SIZE
registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-eureka       v0.0.1    f47e60a46b3c   About a minute ago   690MB

#推送到我自己的阿里云镜像仓库
[root@k8s-master01 demo-eureka]# docker push registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-eureka:v0.0.1
The push refers to repository [registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-eureka]
c8badce1e55f: Pushed
3ae57a88572b: Pushed
35c20f26d188: Mounted from k8s-liujunwei/openjdk
c3fe59dd9556: Mounted from k8s-liujunwei/openjdk
6ed1a81ba5b6: Mounted from k8s-liujunwei/openjdk
a3483ce177ce: Mounted from k8s-liujunwei/openjdk
ce6c8756685b: Mounted from k8s-liujunwei/openjdk
30339f20ced0: Mounted from k8s-liujunwei/openjdk
0eb22bfb707d: Mounted from k8s-liujunwei/openjdk
a2ae92ffcd29: Mounted from k8s-liujunwei/openjdk
v0.0.1: digest: sha256:aa2efcc1a7676f47b611a4f511abd5e4cb09ace4a1ae8efd9c704477c748843a size: 2419

1.1.2将demo-eureka 部署到k8s

在这个场景下（StatefulSet + Eureka 集群），必须要用 Headless Service。不能用普通 Service。

如果使用普通 Service（即有 ClusterIP 的 Service），Eureka 集群大概率会组建失败，或者数据同步出现严重问题。

为什么 Eureka 必须用Headless？

Eureka Server 之间的数据同步（Replication）是 Peer-to-Peer（点对点） 的，而不是简单的 Client-Server 模式。

如果用了普通 Service：

假设配置的地址是普通的 Service 地址 http://eureka-svc:8761。

Eureka-0 启动了，它想把自己注册给伙伴。
它向 eureka-svc 发送了一个请求：“嘿，我是 Eureka-0，这是我的数据，请同步一下。”
K8s Service (总机) 拦截了这个请求，进行负载均衡。
灾难发生：Service 可能会把这个请求转回给 Eureka-0 自己（因为 Eureka-0 也是 Service 后端的 Pod 之一）。
或者，Service 把请求转给了 Eureka-1。下一次心跳，它又转给了 Eureka-2。
后果：Eureka-0 认为它只有一个 Peer（就是那个 Service IP），它无法建立稳定的、全网状的（Mesh）连接。集群状态会变得混乱，数据不一致。

#该Service是一个Headless Service，用来组件eureka集群
kind: Service
apiVersion: v1
metadata:
  name: demo-eureka
  namespace: eureka
spec:
  clusterIP: None
  ports:
  - port: 8761
    targetPort: 8761
  selector:
    app: demo-eureka
---
# 该Service是用来暴露eureka服务，方便在web浏览器访问
kind: Service
apiVersion: v1
metadata:
  name: demo-eureka-nodeport
  namespace: eureka
spec:
  type: NodePort
  ports:
  - port: 8761
    targetPort: 8761
  selector:
    app: demo-eureka
---
# eureka服务使用StatefulSet部署
kind: StatefulSet
apiVersion: apps/v1
metadata:
  name: demo-eureka
  namespace: eureka
  labels:
    app: demo-eureka
spec:
  replicas: 3
  selector:
    matchLabels:
      app: demo-eureka
  serviceName: demo-eureka
  podManagementPolicy: Parallel
  template:
    metadata:
      labels:
        app: demo-eureka
    spec:
      containers:
      - name: demo-eureka
        image: registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-eureka:v0.0.1
        ports:
        - containerPort: 8761
        env:
        - name: EUREKA_PORT
          value: "8761"
        - name: SPRING_PROFILES_ACTIVE
          value: "k8s"
        - name: EUREKA_SERVER_ADDRESS
          value: http://demo-eureka-0.demo-eureka:8761/eureka,http://demo-eureka-1.demo-eureka:8761/eureka,http://demo-eureka-2.demo-eureka:8761/eureka
        - name: EUREKA_SERVER_ENABLE_SELF_PRESERVATION
          value: "false"
        - name: EUREKA_SERVER_EVICTION_INTERVAL_TIMER_IN_MS
          value: "500"
        resources:
            requests:
              cpu: 100m
              memory: 128Mi
            limits:
              cpu: 1000m
              memory: 1Gi
        imagePullPolicy: Always

部署服务：

#将eureka服务部署到独立的命名空间中
[root@k8s-master01 springcloud]# kubectl create ns eureka

#创建服务
[root@k8s-master01 springcloud]# kubectl create  -f demo-eureka.StatefulSet.yaml

检查pod状态：

[root@k8s-master01 springcloud]# kubectl get po -n eureka
NAME            READY   STATUS    RESTARTS   AGE
demo-eureka-0   1/1     Running   0          5s
demo-eureka-1   1/1     Running   0          5s
demo-eureka-2   1/1     Running   0          5s
[root@k8s-master01 springcloud]# kubectl get svc -n eureka
NAME                   TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)          AGE
demo-eureka            ClusterIP   None          <none>        8761/TCP         14s
demo-eureka-nodeport   NodePort    10.96.117.7   <none>        8761:31183/TCP   14s

浏览器可以通过demo-eureka-nodeport暴露的31183端口进行访问，如下图：

1.2迁移网关服务

1.2.1代码构建及容器化

代码地址：https://gitee.com/liujunweipy/demo-receive

构建命令：mvn clean package

Java 版本：jdk 1.8

构建镜像：registry.cn-beijing.aliyuncs.com/k8s-liujunwei/maven:3.5.3

下载源代码：

# 下载代码
[root@k8s-master01 18-SpringCloud]# git clone https://gitee.com/liujunweipy/demo-receive.git
Cloning into 'demo-receive'...
remote: Enumerating objects: 56, done.
remote: Counting objects: 100% (56/56), done.
remote: Compressing objects: 100% (36/36), done.
remote: Total 56 (delta 9), reused 56 (delta 9), pack-reused 0 (from 0)
Receiving objects: 100% (56/56), 9.52 KiB | 1.36 MiB/s, done.
Resolving deltas: 100% (9/9), done.

执行构建：

#  把maven构建所依赖的插件持久化
[root@k8s-master01 18-SpringCloud]# mkdir -p /data/m2

# 运行一个maven临时容器进行代码的构建
# --rm: 自动清理。这意味退出容器后，Docker 会自动删除这个容器实例。这非常适合临时性的任务。
# -v:s 数据卷挂载，将宿主机的目录挂载到容器内，把宿主机`pwd`/demo-eureka目录挂载到容器的/mnt，把宿主机的/data/m2目录挂载到容器的/root/.m2目录。
# bash: 这是容器启动后立即执行的命令。它覆盖了镜像默认的 CMD 或 ENTRYPOINT。

[root@k8s-master01 18-SpringCloud]# docker run -ti --rm -v `pwd`/demo-receive:/mnt -v /data/m2/:/root/.m2 registry.cn-beijing.aliyuncs.com/k8s-liujunwei/maven:3.5.3  bash
root@7ceb1cf6a3da:/#

#进入到代码目录执行构建命令
root@7ceb1cf6a3da:/# cd /mnt/
root@7ceb1cf6a3da:/mnt# ls -l
total 4
-rw-r--r-- 1 root root 2170 Dec 15 04:22 pom.xml
drwxr-xr-x 3 root root   18 Dec 15 04:22 src

# 代码构建
root@70830096ac9f:/mnt# mvn clean package
[INFO] --- spring-boot-maven-plugin:2.1.9.RELEASE:repackage (repackage) @ receive ---
[INFO] Replacing main artifact with repackaged archive
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 42.790 s
[INFO] Finished at: 2025-12-15T04:29:04Z
[INFO] ------------------------------------------------------------------------

查看构建后的产物：

# 构建完成后会在target目录中产生一个jar包，
root@7ceb1cf6a3da:/mnt# ls -l
total 4
-rw-r--r-- 1 root root 2170 Dec 15 04:22 pom.xml
drwxr-xr-x 3 root root   18 Dec 15 04:22 src
drwxr-xr-x 6 root root  165 Dec 15 04:29 target
root@7ceb1cf6a3da:/mnt# ls -l target/
total 38112
drwxr-xr-x 3 root root      101 Dec 15 04:28 classes
drwxr-xr-x 3 root root       25 Dec 15 04:28 generated-sources
drwxr-xr-x 2 root root       28 Dec 15 04:29 maven-archiver
drwxr-xr-x 3 root root       35 Dec 15 04:28 maven-status
-rw-r--r-- 1 root root 39016394 Dec 15 04:29 receive-0.0.1-SNAPSHOT.jar
-rw-r--r-- 1 root root     4181 Dec 15 04:29 receive-0.0.1-SNAPSHOT.jar.original

#因为做了目录映射，所以在宿主机的/root/18-SpringCloud/demo-receive/target也有相同的文件
[root@k8s-master01 target]# ll
total 38112
drwxr-xr-x 3 root root      101 Dec 15 12:28 classes
drwxr-xr-x 3 root root       25 Dec 15 12:28 generated-sources
drwxr-xr-x 2 root root       28 Dec 15 12:29 maven-archiver
drwxr-xr-x 3 root root       35 Dec 15 12:28 maven-status
-rw-r--r-- 1 root root 39016394 Dec 15 12:29 receive-0.0.1-SNAPSHOT.jar
-rw-r--r-- 1 root root     4181 Dec 15 12:29 receive-0.0.1-SNAPSHOT.jar.original

用receive-0.0.1-SNAPSHOT.jar制作镜像：

# 进入项目目录
[root@k8s-master01 18-SpringCloud]# cd demo-receive/

#准备Dockerfile
[root@k8s-master01 demo-eureka]# cat Dockerfile  
FROM registry.cn-beijing.aliyuncs.com/k8s-liujunwei/openjdk:8u111-jdk
WORKDIR /home/app
COPY target/*.jar ./app.jar
CMD ["java", "-jar", "app.jar"]

# 制作镜像
[root@k8s-master01 demo-receive]# docker build -t registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-receive:v0.0.1 .


#查看制作好的镜像
[root@k8s-master01 demo-receive]# docker images|grep demo-re
registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-receive      v0.0.1    922d7b988708   38 seconds ago   682MB

#推送到我自己的阿里云镜像仓库
[root@k8s-master01 demo-receive]# docker push registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-receive:v0.0.1

1.2.2将网关服务部署到k8s

准备网关服务的deployment资源：

[root@k8s-master01 springcloud]# cat demo-receive.deploy.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
  name: demo-receive
  namespace: eureka
spec:
  replicas: 2
  selector:
    matchLabels:
      app: demo-receive
  template:
    metadata:
      labels:
        app: demo-receive
    spec:
      containers:
      - name: demo-receive
        image: registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-receive:v0.0.1
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 8080
        env:
        - name: SPRING_PROFILES_ACTIVE
          value: "k8s"
        - name: SERVER_PORT
          value: "8080"
        - name: EUREKA_SERVER_URL
          value: "http://demo-eureka-0.demo-eureka:8761/eureka,http://demo-eureka-1.demo-eureka:8761/eureka,http://demo-eureka-2.demo-eureka:8761/eureka"
        resources:
            requests:
              memory: "128Mi"
              cpu: "100m"
            limits:
              memory: "256Mi"
              cpu: "500m"

准备网关服务的service资源：

cat demo-receive-svc.yaml
kind: Service
apiVersion: v1
metadata:
  name: demo-receive-svc
  namespace: eureka
  labels:
    app: demo-receive-svc
spec:
  type: ClusterIP
  selector:
    app: demo-receive
  ports:
    - name: http
      port: 8080
      targetPort: 8080

准备网关服务的Ingress：

cat demo-receive-ingress.yaml
kind: Ingress
apiVersion: networking.k8s.io/v1
metadata:
  name: demo-receive-ingress
  namespace: eureka
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$2
spec:
  ingressClassName: nginx
  rules:
  - host: demo.test.com
    http:
      paths:
      - path: /receiveapi(/|$)(.*)
        pathType: ImplementationSpecific
        backend:
          service:
              name: demo-receive-svc
              port:
                  number: 8080

创建上述资源：

#创建网关的deployment服务
[root@k8s-master01 springcloud]# kubectl create -f demo-receive.deploy.yaml
deployment.apps/demo-receive created

#创建网关的svc服务
[root@k8s-master01 springcloud]# kubectl create -f demo-receive-svc.yaml
service/demo-receive-svc created

##创建网关的ingress服务
[root@k8s-master01 springcloud]# kubectl create -f demo-receive-ingress.yaml
ingress.networking.k8s.io/demo-receive-ingress created

#查看创建的服务
[root@k8s-master01 springcloud]# kubectl get po -n eureka
NAME                           READY   STATUS    RESTARTS   AGE
demo-eureka-0                  1/1     Running   0          22h
demo-eureka-1                  1/1     Running   0          22h
demo-eureka-2                  1/1     Running   0          22h
demo-receive-c98d88558-59tb9   1/1     Running   0          14s
demo-receive-c98d88558-flzxn   1/1     Running   0          14s

[root@k8s-master01 springcloud]# kubectl get svc -n eureka
NAME                   TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)          AGE
demo-eureka            ClusterIP   None           <none>        8761/TCP         27m
demo-eureka-nodeport   NodePort    10.96.12.172   <none>        8761:31335/TCP   27m
demo-receive-svc       ClusterIP   10.96.105.27   <none>        8080/TCP         105s
[root@k8s-master01 springcloud]# kubectl get ingress -n eureka
NAME                   CLASS   HOSTS           ADDRESS                                  PORTS   AGE
demo-receive-ingress   nginx   demo.test.com   192.168.0.84,192.168.0.85,192.168.0.86   80      102s

检查网关服务是否注册到eureka：

1.3迁移其他SpringBoot服务

1.3.1代码构建及容器化

代码地址：https://gitee.com/liujunweipy/demo-handler

构建命令：mvn clean package

Java 版本：jdk 1.8

构建镜像：registry.cn-beijing.aliyuncs.com/k8s-liujunwei/maven:3.5.3

下载源代码：

# 下载代码
[root@k8s-master01 18-SpringCloud]# git clone https://gitee.com/liujunweipy/demo-handler.git
Cloning into 'demo-handler'...
remote: Enumerating objects: 77, done.
remote: Counting objects: 100% (77/77), done.
remote: Compressing objects: 100% (48/48), done.
remote: Total 77 (delta 13), reused 77 (delta 13), pack-reused 0 (from 0)
Receiving objects: 100% (77/77), 13.16 KiB | 539.00 KiB/s, done.
Resolving deltas: 100% (13/13), done.

执行构建：

#  把maven构建所依赖的插件持久化
[root@k8s-master01 18-SpringCloud]# mkdir -p /data/m2

# 运行一个maven临时容器进行代码的构建
# --rm: 自动清理。这意味退出容器后，Docker 会自动删除这个容器实例。这非常适合临时性的任务。
# -v:s 数据卷挂载，将宿主机的目录挂载到容器内，把宿主机`pwd`/demo-eureka目录挂载到容器的/mnt，把宿主机的/data/m2目录挂载到容器的/root/.m2目录。
# bash: 这是容器启动后立即执行的命令。它覆盖了镜像默认的 CMD 或 ENTRYPOINT。

[root@k8s-master01 18-SpringCloud]# docker run -ti --rm -v `pwd`/demo-handler:/mnt -v /data/m2/:/root/.m2 registry.cn-beijing.aliyuncs.com/k8s-liujunwei/maven:3.5.3  bash
root@41920c905cd7:/#

#进入到代码目录执行构建命令
root@41920c905cd7:/# cd /mnt/
root@41920c905cd7:/mnt# ls -l
total 4
-rw-r--r-- 1 root root 2170 Dec 15 10:57 pom.xml
drwxr-xr-x 3 root root   18 Dec 15 10:57 src

# 代码构建
root@41920c905cd7:/mnt# mvn clean package
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------< com.handler:handler >-------------------------
[INFO] Building handler 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 13.462 s
[INFO] Finished at: 2025-12-15T11:06:45Z
[INFO] ------------------------------------------------------------------------
root@41920c905cd7:/mnt#

查看构建后的产物：

# 构建完成后会在target目录中产生一个jar包，
root@41920c905cd7:/mnt# ls -l
total 4
-rw-r--r-- 1 root root 2170 Dec 15 10:57 pom.xml
drwxr-xr-x 3 root root   18 Dec 15 10:57 src
drwxr-xr-x 6 root root  165 Dec 15 11:06 target

root@41920c905cd7:/mnt# ls -l  target/
total 38112
drwxr-xr-x 3 root root      101 Dec 15 11:06 classes
drwxr-xr-x 3 root root       25 Dec 15 11:06 generated-sources
-rw-r--r-- 1 root root 39016738 Dec 15 11:06 handler-0.0.1-SNAPSHOT.jar
-rw-r--r-- 1 root root     4525 Dec 15 11:06 handler-0.0.1-SNAPSHOT.jar.original
drwxr-xr-x 2 root root       28 Dec 15 11:06 maven-archiver
drwxr-xr-x 3 root root       35 Dec 15 11:06 maven-status

#因为做了目录映射，所以在宿主机的/root/18-SpringCloud/demo-handler/target也有相同的文件
[root@k8s-master01 18-SpringCloud]# ll demo-handler/target/
total 38112
drwxr-xr-x 3 root root      101 Dec 15 19:06 classes
drwxr-xr-x 3 root root       25 Dec 15 19:06 generated-sources
-rw-r--r-- 1 root root 39016738 Dec 15 19:06 handler-0.0.1-SNAPSHOT.jar
-rw-r--r-- 1 root root     4525 Dec 15 19:06 handler-0.0.1-SNAPSHOT.jar.original
drwxr-xr-x 2 root root       28 Dec 15 19:06 maven-archiver
drwxr-xr-x 3 root root       35 Dec 15 19:06 maven-status

用handler-0.0.1-SNAPSHOT.jar制作镜像：

# 进入项目目录
[root@k8s-master01 18-SpringCloud]# cd demo-handler/

#准备Dockerfile
[root@k8s-master01 demo-eureka]# cat Dockerfile  
FROM registry.cn-beijing.aliyuncs.com/k8s-liujunwei/openjdk:8u111-jdk
WORKDIR /home/app
COPY target/*.jar ./app.jar
CMD ["java", "-jar", "app.jar"]

# 制作镜像
[root@k8s-master01 demo-receive]# docker build -t registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-handler:v0.0.1 .


#查看制作好的镜像
[root@k8s-master01 demo-handler]# docker images|grep handler
registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-handler      v0.0.1    d1648160e57f   15 seconds ago   682MB

#推送到我自己的阿里云镜像仓库
[root@k8s-master01 demo-handler]# docker push  registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-handler:v0.0.1
The push refers to repository [registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-handler]
6915ab2a13e7: Pushed
3ae57a88572b: Mounted from k8s-liujunwei/demo-receive
35c20f26d188: Mounted from k8s-liujunwei/demo-receive
c3fe59dd9556: Mounted from k8s-liujunwei/demo-receive
6ed1a81ba5b6: Mounted from k8s-liujunwei/demo-receive
a3483ce177ce: Mounted from k8s-liujunwei/demo-receive
ce6c8756685b: Mounted from k8s-liujunwei/demo-receive
30339f20ced0: Mounted from k8s-liujunwei/demo-receive
0eb22bfb707d: Mounted from k8s-liujunwei/demo-receive
a2ae92ffcd29: Mounted from k8s-liujunwei/demo-receive
v0.0.1: digest: sha256:d425170eec6c660a296d4e2697584f3920e3dbc5b0f042bcbd47f9dbeb39c445 size: 2419

1.3.2将demo-handler部署到k8s

准备deployment资源：

kind: Deployment
apiVersion: apps/v1
metadata:
  name: demo-handler
  namespace: eureka
spec:
  replicas: 2
  selector:
    matchLabels:
      app: demo-handler
  template:
    metadata:
      labels:
        app: demo-handler
    spec:
      containers:
      - name: demo-handler
        image: registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-handler:v0.0.1
        ports:
        - containerPort: 8080
        env:
        - name: SERVER_PORT
          value: "8080"
        - name: SPRING_PROFILES_ACTIVE
          value: "k8s"
        - name: EUREKA_SERVER_ADDRESS
          value: "http://demo-eureka-0.demo-eureka:8761/eureka,http://demo-eureka-1.demo-eureka:8761/eureka,http://demo-eureka-2.demo-eureka:8761/eureka"
        resources:
            limits:
              cpu: 1000m
              memory: 1024Mi
            requests:
              cpu: 500m
              memory: 512Mi

创建资源：

[root@k8s-master01 springcloud]# kubectl create -f demo-handler-deploy.yaml
deployment.apps/demo-handler created

#查看pod状态
[root@k8s-master01 springcloud]# kubectl get po -n eureka
NAME                            READY   STATUS    RESTARTS   AGE
demo-eureka-0                   1/1     Running   0          5h33m
demo-eureka-1                   1/1     Running   0          5h33m
demo-eureka-2                   1/1     Running   0          5h33m
demo-handler-579c66cb44-85js2   1/1     Running   0          52s
demo-handler-579c66cb44-cldbw   1/1     Running   0          64s
demo-receive-54bf5ddb4d-btm25   1/1     Running   0          177m
demo-receive-54bf5ddb4d-hjfbq   1/1     Running   0          177m

查看服务是否注册到eureka：

1.4迁移前端服务

1.4.1前端项目构建及容器化

代码地址：https://gitee.com/liujunweipy/demo-ui

构建命令：npm install –registry=https://registry.npmmirror.com && npm run build

Node版本：16.17+

构建镜像：registry.cn-beijing.aliyuncs.com/k8s-liujunwei/node:16.20

下载源代码：

# 下载代码
[root@k8s-master01 18-SpringCloud]# git clone https://gitee.com/liujunweipy/demo-ui.git
Cloning into 'demo-ui'...
remote: Enumerating objects: 43, done.
remote: Counting objects: 100% (43/43), done.
remote: Compressing objects: 100% (26/26), done.
remote: Total 43 (delta 14), reused 43 (delta 14), pack-reused 0 (from 0)
Receiving objects: 100% (43/43), 26.09 KiB | 861.00 KiB/s, done.
Resolving deltas: 100% (14/14), done.

执行构建：

[root@k8s-master01 18-SpringCloud]# docker run -ti --rm -v `pwd`/demo-ui:/mnt/ registry.cn-beijing.aliyuncs.com/k8s-liujunwei/node:16.20 bash
Unable to find image 'registry.cn-beijing.aliyuncs.com/k8s-liujunwei/node:16.20' locally
16.20: Pulling from k8s-liujunwei/node
311da6c465ea: Pull complete
ee7d78be1eb9: Pull complete
Digest: sha256:c94b82f9827cab6e421b350965a9ef11b25b13ffbd1030536203d541f55dcbe2
Status: Downloaded newer image for registry.cn-beijing.aliyuncs.com/k8s-liujunwei/node:16.20
root@8933ee58783b:/#

#进入项目目录
root@8933ee58783b:/# cd /mnt/
root@8933ee58783b:/mnt# ls -l
total 96
-rw-r--r-- 1 root root   440 Dec 15 13:45 README.md
-rw-r--r-- 1 root root   357 Dec 15 13:45 index.html
-rw-r--r-- 1 root root 78659 Dec 15 13:45 package-lock.json
-rw-r--r-- 1 root root   335 Dec 15 13:45 package.json
drwxr-xr-x 2 root root    22 Dec 15 13:45 public
drwxr-xr-x 4 root root    85 Dec 15 13:45 src
-rw-r--r-- 1 root root   157 Dec 15 13:45 vite.config.js

# 构建前端代码
root@8933ee58783b:/mnt# npm install --registry=https://registry.npmmirror.com
npm WARN EBADENGINE Unsupported engine {
npm WARN EBADENGINE   package: '@vitejs/plugin-vue@5.0.4',
npm WARN EBADENGINE   required: { node: '^18.0.0 || >=20.0.0' },
npm WARN EBADENGINE   current: { node: 'v16.20.2', npm: '8.19.4' }
npm WARN EBADENGINE }
added 54 packages in 7s
10 packages are looking for funding
  run `npm fund` for details
npm notice
npm notice New major version of npm available! 8.19.4 -> 11.7.0
npm notice Changelog: https://github.com/npm/cli/releases/tag/v11.7.0
npm notice Run npm install -g npm@11.7.0 to update!
npm notice

root@8933ee58783b:/mnt#  npm run build

> demo-ui@0.0.0 build
> vite build

vite v5.2.0 building for production...
✓ 58 modules transformed.
dist/index.html                  0.46 kB │ gzip:  0.29 kB
dist/assets/index-BYh5Cz0w.css   1.27 kB │ gzip:  0.65 kB
dist/assets/index-BZep8zp5.js   83.61 kB │ gzip: 33.25 kB
✓ built in 5.02s

# 构建完成，查看构建后的产物
root@8933ee58783b:/mnt# ls -l dist/
total 8
drwxr-xr-x 2 root root   57 Dec 15 14:25 assets
-rw-r--r-- 1 root root  456 Dec 15 14:25 index.html
-rw-r--r-- 1 root root 1497 Dec 15 14:25 vite.svg
root@8933ee58783b:/mnt#

构建前端镜像：

#准备一个nginx的配置文件，用来替换镜像中默认的配置文件，使用默认的也可以
[root@k8s-master01 demo-ui]# cat /root/18-SpringCloud/demo-ui/default.conf
server {
    listen 80;
    listen  [::]:80;
    server_name  localhost;
    gzip on;
    gzip_types text/plain application/javascript text/css;

    root /usr/share/nginx/html;
    index index.html;

    location / {
        add_header Cache-Control "no-cache, no-store";
        try_files $uri $uri/ /index.html;
    }

    location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
        expires 30d;
    }

}

准备Dockerfile：

[root@k8s-master01 demo-ui]# cat /root/18-SpringCloud/demo-ui/Dockerfile
FROM registry.cn-beijing.aliyuncs.com/k8s-liujunwei/nginx:1.27-alpine
# 1. (可选) 设置时区为上海，方便查看 Nginx 日志时间
RUN apk add --no-cache tzdata && \
    cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
    echo "Asia/Shanghai" > /etc/timezone
# 2. 先删除 Nginx 默认的配置文件，防止冲突
RUN rm -rf /etc/nginx/conf.d/*
# 3. 复制你的自定义配置
COPY default.conf /etc/nginx/conf.d/default.conf
# 4. 复制构建产物
COPY dist /usr/share/nginx/html
# 5. (可选) 这是一个好习惯，显式声明端口，虽然 Nginx 默认就是 80
EXPOSE 80
# 6. (可选) 显式启动命令
CMD ["nginx", "-g", "daemon off;"]

制作前端镜像：

[root@k8s-master01 demo-ui]# docker build -t registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-ui:v0.0.1 .
[+] Building 98.4s (11/11) FINISHED                                                                                                                                         docker:default
 => [internal] load build definition from Dockerfile                                                                                                                                  0.0s
 => => transferring dockerfile: 734B                                                                                                                                                  0.0s
 => [internal] load metadata for registry.cn-beijing.aliyuncs.com/k8s-liujunwei/nginx:1.27-alpine                                                                                     0.9s
 ...                                                                                                                                      
 => [2/5] RUN apk add --no-cache tzdata &&     cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime &&     echo "Asia/Shanghai" > /etc/timezone                                       91.0s
 => [3/5] RUN rm -rf /etc/nginx/conf.d/*                                                                                                                                              0.6s
 => [4/5] COPY default.conf /etc/nginx/conf.d/default.conf                                                                                                                            0.1s
 => [5/5] COPY dist /usr/share/nginx/html                                                 
 => => writing image sha256:863e9465728d1a67e24a72fa11c009702ccc2d4c78a6ed4152222dd74525ae79                                                                                          0.0s
 => => naming to registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-ui:v0.0.1
 
 
# 镜像已经制作完毕
[root@k8s-master01 demo-ui]# docker images|grep 'demo-ui'
registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-ui           v0.0.1    863e9465728d   6 minutes ago   43.5MB

# 将制作好的前端镜像推送到阿里云镜像仓库
[root@k8s-master01 demo-ui]# docker push registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-ui:v0.0.1
The push refers to repository [registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-ui]
67ee358a8f38: Pushed
277aadeb1168: Pushed
8831ee1ed178: Pushed
81ad19c3658b: Pushed
a51b172d7184: Mounted from k8s-liujunwei/nginx
b7486fe26981: Mounted from k8s-liujunwei/nginx
320c8baef084: Mounted from k8s-liujunwei/nginx
d2cef4a1b224: Mounted from k8s-liujunwei/nginx
4275164ce225: Mounted from k8s-liujunwei/nginx
6e92270dbfe6: Mounted from k8s-liujunwei/nginx
b5d2e1fcf1ad: Mounted from k8s-liujunwei/nginx
af9a70194aa4: Mounted from k8s-liujunwei/nginx
v0.0.1: digest: sha256:c298d37e2f537fc8b3735f8fd94cb78bd798c91160103e3e1211733851375cd2 size: 2821

检查镜像仓库是否有该镜像：

1.4.2部署前端项目到k8s

准备前端资源文件：

cat  demo-ui-deploy.yaml
# 前端的deployment
kind: Deployment
apiVersion: apps/v1
metadata:
  name: demo-ui
  namespace: eureka
  labels:
    app: demo-ui
spec:
  replicas: 1
  selector:
    matchLabels:
      app: demo-ui
  template:
    metadata:
      labels:
        app: demo-ui
    spec:
      containers:
      - name: demo-ui
        image: registry.cn-beijing.aliyuncs.com/k8s-liujunwei/demo-ui:v0.0.1
        ports:
        - containerPort: 80
        resources:
          limits:
            cpu: 1000m
            memory: 1Gi
          requests:
            cpu: 100m
            memory: 256Mi
---        
# 前端Service文件
kind: Service
apiVersion: v1
metadata:
  name: demo-ui
  namespace: eureka
  labels:
    app: demo-ui
spec:
  type: ClusterIP
  ports:
  - port: 80
    targetPort: 80
  selector:
    app: demo-ui
    
    
---
# demo-ui前端的Ingress
kind: Ingress
apiVersion: networking.k8s.io/v1
metadata:
    name: demo-ui-ingress
    namespace: eureka
spec:
    ingressClassName: nginx
    rules:
    - host: demo.test.com
      http:
        paths:
        - path: /
          pathType: ImplementationSpecific
          backend:
            service:
              name: demo-ui
              port:
                number: 80

创建资源：

[root@k8s-master01 springcloud]# kubectl create -f demo-ui-deploy.yaml
deployment.apps/demo-ui created
service/demo-ui created
ingress.networking.k8s.io/demo-ui-ingress created

查看pod运行情况：

[root@k8s-master01 springcloud]# kubectl get po -n eureka
NAME                            READY   STATUS    RESTARTS   AGE
demo-eureka-0                   1/1     Running   0          22h
demo-eureka-1                   1/1     Running   0          22h
demo-eureka-2                   1/1     Running   0          22h
demo-handler-579c66cb44-85js2   1/1     Running   0          16h
demo-handler-579c66cb44-hd57s   1/1     Running   0          41s
demo-receive-54bf5ddb4d-btm25   1/1     Running   0          19h
demo-receive-54bf5ddb4d-wkqxb   1/1     Running   0          52s
demo-ui-56f5c5d4db-cz88x        1/1     Running   0          18s
demo-ui-56f5c5d4db-vfdsg        1/1     Running   0          117s

浏览器访问测试demo.test.com，测试环境需要添加hosts解析：

到此项目迁移完成！