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https://github.com/v5tech/k8s-example
Spring Boot整合Kubernetes
https://github.com/v5tech/k8s-example
k8s kt-connect kubernetes kustomize kustomize-example skaffold skaffold-example spring-boot-2
Last synced: 22 days ago
JSON representation
Spring Boot整合Kubernetes
- Host: GitHub
- URL: https://github.com/v5tech/k8s-example
- Owner: v5tech
- Created: 2020-05-07T08:53:40.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2022-06-21T14:36:44.000Z (over 2 years ago)
- Last Synced: 2024-10-11T18:01:40.294Z (about 1 month ago)
- Topics: k8s, kt-connect, kubernetes, kustomize, kustomize-example, skaffold, skaffold-example, spring-boot-2
- Language: Java
- Homepage:
- Size: 1.53 MB
- Stars: 5
- Watchers: 3
- Forks: 4
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# k8s-example
### 使用`spring-boot-maven-plugin`构建
升级spring boot 版本为2.3.x，执行`spring-boot:build-image`命令即可。
```bash
$ mvn spring-boot:build-image
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------------< net.ameizi:k8s-example >-----------------------
[INFO] Building k8s-example 1.0.0
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] >>> spring-boot-maven-plugin:2.3.0.BUILD-SNAPSHOT:build-image (default-cli) > package @ k8s-example >>>
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ k8s-example ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ k8s-example ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to /Users/amz/develop/workspace/k8s-example/target/classes
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ k8s-example ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/amz/develop/workspace/k8s-example/src/test/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ k8s-example ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to /Users/amz/develop/workspace/k8s-example/target/test-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ k8s-example ---
Downloading from spring-milestones: https://repo.spring.io/milestone/org/apache/maven/surefire/surefire-junit-platform/2.22.2/surefire-junit-platform-2.22.2.pom
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[INFO]
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
[INFO] Running net.ameizi.k8s.example.K8sExampleApplicationTests
14:26:46.188 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
14:26:46.206 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
14:26:46.250 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [net.ameizi.k8s.example.K8sExampleApplicationTests] from class [org.springframework.boot.test.context.SpringBootTestContextBootstrapper]
14:26:46.267 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [net.ameizi.k8s.example.K8sExampleApplicationTests], using SpringBootContextLoader
14:26:46.277 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [net.ameizi.k8s.example.K8sExampleApplicationTests]: class path resource [net/ameizi/k8s/example/K8sExampleApplicationTests-context.xml] does not exist
14:26:46.278 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [net.ameizi.k8s.example.K8sExampleApplicationTests]: class path resource [net/ameizi/k8s/example/K8sExampleApplicationTestsContext.groovy] does not exist
14:26:46.278 [main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [net.ameizi.k8s.example.K8sExampleApplicationTests]: no resource found for suffixes {-context.xml, Context.groovy}.
14:26:46.279 [main] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [net.ameizi.k8s.example.K8sExampleApplicationTests]: K8sExampleApplicationTests does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
14:26:46.354 [main] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [net.ameizi.k8s.example.K8sExampleApplicationTests]
14:26:46.457 [main] DEBUG org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider - Identified candidate component class: file [/Users/amz/develop/workspace/k8s-example/target/classes/net/ameizi/k8s/example/K8sExampleApplication.class]
14:26:46.458 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration net.ameizi.k8s.example.K8sExampleApplication for test class net.ameizi.k8s.example.K8sExampleApplicationTests
14:26:46.580 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - @TestExecutionListeners is not present for class [net.ameizi.k8s.example.K8sExampleApplicationTests]: using defaults.
14:26:46.582 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]
14:26:46.603 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
14:26:46.604 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
14:26:46.605 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.web.ServletTestExecutionListener@1da2cb77, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@48f278eb, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@2f217633, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@a530d0a, org.springframework.test.context.support.DirtiesContextTestExecutionListener@1a18644, org.springframework.test.context.event.EventPublishingTestExecutionListener@5acf93bb, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@7e7be63f, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@6cd28fa7, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@614ca7df, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@4738a206, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@66d3eec0]
14:26:46.609 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test class: context [DefaultTestContext@741a8937 testClass = K8sExampleApplicationTests, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [WebMergedContextConfiguration@306e95ec testClass = K8sExampleApplicationTests, locations = '{}', classes = '{class net.ameizi.k8s.example.K8sExampleApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@2ddc8ecb, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@33afa13b, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@5dd6264, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@7c0c77c7, org.springframework.boot.test.context.SpringBootTestArgs@1], resourceBasePath = 'src/main/webapp', contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map['org.springframework.test.context.web.ServletTestExecutionListener.activateListener' -> true]], class annotated with @DirtiesContext [false] with mode [null].
14:26:46.654 [main] DEBUG org.springframework.test.context.support.TestPropertySourceUtils - Adding inlined properties to environment: {spring.jmx.enabled=false, org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.3.0.BUILD-SNAPSHOT)
2020-05-07 14:26:47.064 INFO 44321 --- [ main] n.a.k.e.K8sExampleApplicationTests : Starting K8sExampleApplicationTests on swfeng.local with PID 44321 (started by amz in /Users/amz/develop/workspace/k8s-example)
2020-05-07 14:26:47.066 INFO 44321 --- [ main] n.a.k.e.K8sExampleApplicationTests : No active profile set, falling back to default profiles: default
2020-05-07 14:26:48.913 INFO 44321 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-05-07 14:26:49.506 INFO 44321 --- [ main] o.s.b.a.e.web.EndpointLinksResolver : Exposing 13 endpoint(s) beneath base path '/actuator'
2020-05-07 14:26:49.595 INFO 44321 --- [ main] n.a.k.e.K8sExampleApplicationTests : Started K8sExampleApplicationTests in 2.92 seconds (JVM running for 4.057)
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.872 s - in net.ameizi.k8s.example.K8sExampleApplicationTests
2020-05-07 14:26:49.969 INFO 44321 --- [extShutdownHook] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO]
[INFO] --- maven-jar-plugin:3.2.0:jar (default-jar) @ k8s-example ---
[INFO] Building jar: /Users/amz/develop/workspace/k8s-example/target/k8s-example-1.0.0.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:2.3.0.BUILD-SNAPSHOT:repackage (repackage) @ k8s-example ---
[INFO] Replacing main artifact with repackaged archive
[INFO]
[INFO] --- jib-maven-plugin:2.2.0:build (default) @ k8s-example ---
[INFO]
[INFO] Containerizing application to registry.hub.docker.com/aimeizi/k8s-example...
[WARNING] Base image 'openjdk:8-jdk-alpine' does not use a specific image digest - build may not be reproducible
[INFO] Using credentials from Docker config (/Users/amz/.docker/config.json) for registry.hub.docker.com/aimeizi/k8s-example
[INFO] The base image requires auth. Trying again for openjdk:8-jdk-alpine...
[WARNING] The credential helper (docker-credential-desktop) has nothing for server URL: registry-1.docker.ioNG]
Got output:
credentials not found in native keychain
[INFO] Using credentials from Docker config (/Users/amz/.docker/config.json) for openjdk:8-jdk-alpine
[INFO] Using base image with digest: sha256:44b3cea369c947527e266275cee85c71a81f20fc5076f6ebb5a13f19015dce71
[INFO]
[INFO] Container entrypoint set to [java, -cp, /app/resources:/app/classes:/app/libs/*, net.ameizi.k8s.example.K8sExampleApplication]
[INFO]
[INFO] Built and pushed image as registry.hub.docker.com/aimeizi/k8s-example
[INFO] Executing tasks:
[INFO] [=========================== ] 88.9% complete
[INFO] > launching layer pushers
[INFO]
[INFO]
[INFO] <<< spring-boot-maven-plugin:2.3.0.BUILD-SNAPSHOT:build-image (default-cli) < package @ k8s-example <<<
[INFO]
[INFO]
[INFO] --- spring-boot-maven-plugin:2.3.0.BUILD-SNAPSHOT:build-image (default-cli) @ k8s-example ---
[INFO] Building image 'docker.io/library/k8s-example:1.0.0'
[INFO]
[INFO] > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 0%
[INFO] > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 2%
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[INFO] > Executing lifecycle version v0.7.4
[INFO] > Using build cache volume 'pack-cache-55330c9f9824.build'
[INFO]
[INFO] > Running detector
[INFO] [detector] 5 of 15 buildpacks participating
[INFO] [detector] paketo-buildpacks/bellsoft-liberica 2.5.0
[INFO] [detector] paketo-buildpacks/executable-jar 1.2.2
[INFO] [detector] paketo-buildpacks/apache-tomcat 1.1.2
[INFO] [detector] paketo-buildpacks/dist-zip 1.2.2
[INFO] [detector] paketo-buildpacks/spring-boot 1.5.2
[INFO]
[INFO] > Running analyzer
[INFO] [analyzer] Previous image with name "docker.io/library/k8s-example:1.0.0" not found
[INFO]
[INFO] > Running restorer
[INFO]
[INFO] > Running builder
[INFO] [builder]
[INFO] [builder] Paketo BellSoft Liberica Buildpack 2.5.0
[INFO] [builder] Set $BP_JAVA_VERSION to configure the Java version. Default 11.*.
[INFO] [builder] Set $BPL_HEAD_ROOM to configure the headroom in memory calculation. Default 0.
[INFO] [builder] Set $BPL_LOADED_CLASS_COUNT to configure the number of loaded classes in memory calculation. Default 35% of classes.
[INFO] [builder] Set $BPL_THREAD_COUNT to configure the number of threads in memory calculation. Default 250.
[INFO] [builder] BellSoft Liberica JRE 8.0.252: Contributing to layer
[INFO] [builder] Downloading from https://github.com/bell-sw/Liberica/releases/download/8u252+9/bellsoft-jre8u252+9-linux-amd64.tar.gz
[INFO] [builder] Verifying checksum
[INFO] [builder] Expanding to /layers/paketo-buildpacks_bellsoft-liberica/jre
[INFO] [builder] Writing env.launch/JAVA_HOME.override
[INFO] [builder] Writing env.launch/MALLOC_ARENA_MAX.override
[INFO] [builder] Writing profile.d/active-processor-count.sh
[INFO] [builder] Memory Calculator 4.0.0: Contributing to layer
[INFO] [builder] Downloading from https://github.com/cloudfoundry/java-buildpack-memory-calculator/releases/download/v4.0.0/memory-calculator-4.0.0.tgz
[INFO] [builder] Verifying checksum
[INFO] [builder] Expanding to /layers/paketo-buildpacks_bellsoft-liberica/memory-calculator
[INFO] [builder] Writing profile.d/memory-calculator.sh
[INFO] [builder] Class Counter: Contributing to layer
[INFO] [builder] Copying to /layers/paketo-buildpacks_bellsoft-liberica/class-counter
[INFO] [builder] JVMKill Agent 1.16.0: Contributing to layer
[INFO] [builder] Downloading from https://github.com/cloudfoundry/jvmkill/releases/download/v1.16.0.RELEASE/jvmkill-1.16.0-RELEASE.so
[INFO] [builder] Verifying checksum
[INFO] [builder] Copying to /layers/paketo-buildpacks_bellsoft-liberica/jvmkill
[INFO] [builder] Writing env.launch/JAVA_OPTS.append
[INFO] [builder] Link-Local DNS: Contributing to layer
[INFO] [builder] Copying to /layers/paketo-buildpacks_bellsoft-liberica/link-local-dns
[INFO] [builder] Writing profile.d/link-local-dns.sh
[INFO] [builder] Java Security Properties: Contributing to layer
[INFO] [builder] Writing env.launch/JAVA_OPTS.append
[INFO] [builder] Writing env.launch/JAVA_SECURITY_PROPERTIES.override
[INFO] [builder] Security Providers Configurer: Contributing to layer
[INFO] [builder] Copying to /layers/paketo-buildpacks_bellsoft-liberica/security-providers-configurer
[INFO] [builder] Writing profile.d/security-providers-classpath.sh
[INFO] [builder] Writing profile.d/security-providers-configurer.sh
[INFO] [builder] OpenSSL Security Provider 1.0.2: Contributing to layer
[INFO] [builder] Downloading from https://jitpack.io/com/github/paketo-buildpacks/openssl-security-provider/1.0.2/openssl-security-provider-1.0.2.jar
[INFO] [builder] Verifying checksum
[INFO] [builder] Copying to /layers/paketo-buildpacks_bellsoft-liberica/openssl-security-provider
[INFO] [builder] Writing env.launch/SECURITY_PROVIDERS.append
[INFO] [builder] Writing env.launch/SECURITY_PROVIDERS_CLASSPATH
[INFO] [builder] Writing profile.d/openssl-security-provider.sh
[INFO] [builder]
[INFO] [builder] Paketo Executable JAR Buildpack 1.2.2
[INFO] [builder] Writing env/CLASSPATH
[INFO] [builder] Process types:
[INFO] [builder] executable-jar: java -cp "${CLASSPATH}" ${JAVA_OPTS} org.springframework.boot.loader.JarLauncher
[INFO] [builder] task: java -cp "${CLASSPATH}" ${JAVA_OPTS} org.springframework.boot.loader.JarLauncher
[INFO] [builder] web: java -cp "${CLASSPATH}" ${JAVA_OPTS} org.springframework.boot.loader.JarLauncher
[INFO] [builder]
[INFO] [builder] Paketo Spring Boot Buildpack 1.5.2
[INFO] [builder] Image labels:
[INFO] [builder] org.opencontainers.image.title
[INFO] [builder] org.opencontainers.image.version
[INFO] [builder] org.springframework.boot.spring-configuration-metadata.json
[INFO] [builder] org.springframework.boot.version
[INFO]
[INFO] > Running exporter
[INFO] [exporter] Adding layer 'launcher'
[INFO] [exporter] Adding layer 'paketo-buildpacks/bellsoft-liberica:class-counter'
[INFO] [exporter] Adding layer 'paketo-buildpacks/bellsoft-liberica:java-security-properties'
[INFO] [exporter] Adding layer 'paketo-buildpacks/bellsoft-liberica:jre'
[INFO] [exporter] Adding layer 'paketo-buildpacks/bellsoft-liberica:jvmkill'
[INFO] [exporter] Adding layer 'paketo-buildpacks/bellsoft-liberica:link-local-dns'
[INFO] [exporter] Adding layer 'paketo-buildpacks/bellsoft-liberica:memory-calculator'
[INFO] [exporter] Adding layer 'paketo-buildpacks/bellsoft-liberica:openssl-security-provider'
[INFO] [exporter] Adding layer 'paketo-buildpacks/bellsoft-liberica:security-providers-configurer'
[INFO] [exporter] Adding layer 'paketo-buildpacks/executable-jar:class-path'
[INFO] [exporter] Adding 1/1 app layer(s)
[INFO] [exporter] Adding layer 'config'
[INFO] [exporter] *** Images (39ca89c37d5b):
[INFO] [exporter] docker.io/library/k8s-example:1.0.0
[INFO] [exporter] Adding cache layer 'paketo-buildpacks/executable-jar:class-path'
[INFO]
[INFO] Successfully built image 'docker.io/library/k8s-example:1.0.0'
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 08:13 min
[INFO] Finished at: 2020-05-07T14:34:48+08:00
[INFO] ------------------------------------------------------------------------
```
根据日志输出发现构建好的镜像默认为`docker.io/library/k8s-example:1.0.0`。当然这个可以配置修改
```xml
org.springframework.boot
spring-boot-maven-plugin
k8s-example:latest
```
### 使用`jib-maven-plugin`插件构建 `docker` 镜像
```xml
com.google.cloud.tools
jib-maven-plugin
2.2.0
package
build
openjdk:8-jdk-alpine
registry.hub.docker.com/aimeizi/k8s-example:latest
net.ameizi.k8s.example.K8sExampleApplication
8080
```
执行构建
[](https://asciinema.org/a/Esgs9ePRSWqwYAGjD8CI84Lne)
### Kubernetes
导出 Deployment
```bash
$ mkdir k8s
$ kubectl create deployment k8s-example --image registry.hub.docker.com/aimeizi/k8s-example:latest -o yaml --dry-run > k8s/deployment.yaml
```
生成的deployment.yaml如下所示:
```yaml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: k8s-example
name: k8s-example
spec:
replicas: 1
selector:
matchLabels:
app: k8s-example
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: k8s-example
spec:
containers:
- image: registry.hub.docker.com/aimeizi/k8s-example:latest
name: k8s-example
resources: {}
status: {}
```
导出 Service
* ClusterIP方式
```bash
$ kubectl create service clusterip k8s-example --tcp 80:8080 -o yaml --dry-run > k8s/service.yaml
```
其中`80:8080`，80为宿主机端口，8080为容器内应用端口
生成的service.yaml如下所示:
```yaml
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: k8s-example
name: k8s-example
spec:
ports:
- name: 80-8080
port: 80
protocol: TCP
targetPort: 8080
selector:
app: k8s-example
type: ClusterIP # ClusterIP 需要 kubectl port-forward
status:
loadBalancer: {}
```
应用和部署生成的Deployment、Service文件
首先开启 watch 监听
```bash
$ watch -n 1 kubectl get all
Every 1.0s: kubectl get all swfeng.local: Thu May 7 10:26:58 2020
NAME READY STATUS RESTARTS AGE
pod/k8s-example-664b9f68d4-jwxmb 1/1 Running 0 52s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/k8s-example ClusterIP 10.96.67.94 80/TCP 52s
service/kubernetes ClusterIP 10.96.0.1 443/TCP 14d
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/k8s-example 1/1 1 1 52s
```
应用生成的yaml 文件
```bash
$ kubectl apply -f ./k8s
deployment.apps/k8s-example created
service/k8s-example created
```
访问和测试应用
使用`kubectl port-forward`端口映射
```bash
$ kubectl port-forward service/k8s-example 8080:80
Forwarding from 127.0.0.1:8080 -> 8080
Forwarding from [::1]:8080 -> 8080
```
使用`kubectl port-forward`将`service/k8s-example`服务的 80 端口映射到宿主机的8080端口
测试访问
```bash
curl http://127.0.0.1:8080/hello
hello,kubernetes!
```
* LoadBalancer方式
注意:完成该实验时先清理资源。具体使用如下的命令
```bash
$ kubectl delete -f ./k8s
deployment.apps "k8s-example" deleted
service "k8s-example" deleted
```
备份并修改service.yaml文件，修改service.yaml文件中的`ClusterIp`为`LoadBalancer`，其修改后的文件内容为
```yaml
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: k8s-example
name: k8s-example
spec:
ports:
- name: 80-8080
port: 80
protocol: TCP
targetPort: 8080
selector:
app: k8s-example
type: LoadBalancer # LoadBalancer 不需要kubectl port-forward 直接用映射出来的 IP 和端口访问
status:
loadBalancer: {}
```
应用修改后的文件
```bash
$ kubectl apply -f ./k8s
```
观察服务映射信息
```bash
$ watch -n 1 kubectl get all
Every 1.0s: kubectl get all swfeng.local: Thu May 7 10:48:50 2020
NAME READY STATUS RESTARTS AGE
pod/k8s-example-664b9f68d4-wnf4s 1/1 Running 0 71s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/k8s-example LoadBalancer 10.100.43.70 localhost 80:31223/TCP 71s
service/kubernetes ClusterIP 10.96.0.1 443/TCP 14d
```
或执行如下的命令
```bash
$ kubectl get service k8s-example -w
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
k8s-example LoadBalancer 10.100.43.70 localhost 80:31223/TCP 5m47s
```
根据日志输出发现`service/k8s-example`，已经做好了 IP、端口映射绑定。
测试并访问应用
```bash
$ curl http://127.0.0.1/hello
hello,kubernetes!
```
### Skaffold
检查版本信息
```bash
$ skaffold version
v1.9.0
```
生成skaffold.yaml文件
```bash
$ skaffold init --XXenableJibInit
apiVersion: skaffold/v2beta3
kind: Config
metadata:
name: k-s-example
build:
artifacts:
- image: registry.hub.docker.com/aimeizi/k8s-example
jib:
project: net.ameizi:k8s-example
deploy:
kubectl:
manifests:
- k8s/deployment.yaml
- k8s/service.yaml
Do you want to write this configuration to skaffold.yaml? [y/n]: y
Configuration skaffold.yaml was written
You can now run [skaffold build] to build the artifacts
or [skaffold run] to build and deploy
or [skaffold dev] to enter development mode, with auto-redeploy
```
执行完上述操作后会在项目根目录生成一个`skaffold.yaml`文件，其内容为：
```yaml
apiVersion: skaffold/v2beta3
kind: Config
metadata:
name: k-s-example
build:
artifacts:
- image: registry.hub.docker.com/aimeizi/k8s-example
jib:
project: net.ameizi:k8s-example
deploy:
kubectl:
manifests:
- k8s/deployment.yaml
- k8s/service.yaml
```
使用Skaffold部署应用
```bash
$ skaffold dev --port-forward
Listing files to watch...
- registry.hub.docker.com/aimeizi/k8s-example
Generating tags...
- registry.hub.docker.com/aimeizi/k8s-example -> registry.hub.docker.com/aimeizi/k8s-example:latest
Some taggers failed. Rerun with -vdebug for errors.
Checking cache...
- registry.hub.docker.com/aimeizi/k8s-example: Not found. Building
Found [docker-desktop] context, using local docker daemon.
Building [registry.hub.docker.com/aimeizi/k8s-example]...
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------------< net.ameizi:k8s-example >-----------------------
[INFO] Building k8s-example 1.0.0
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- jib-maven-plugin:2.2.0:_skaffold-fail-if-jib-out-of-date (default-cli) @ k8s-example ---
[INFO]
[INFO] -----------------------< net.ameizi:k8s-example >-----------------------
[INFO] Building k8s-example 1.0.0
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ k8s-example ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ k8s-example ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ k8s-example ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/amz/develop/workspace/k8s-example/src/test/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ k8s-example ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to /Users/amz/develop/workspace/k8s-example/target/test-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ k8s-example ---
Downloading from aliyun: https://maven.aliyun.com/repository/public/org/apache/maven/surefire/surefire-junit-platform/2.22.2/surefire-junit-platform-2.22.2.pom
Downloaded from aliyun: https://maven.aliyun.com/repository/public/org/apache/maven/surefire/surefire-junit-platform/2.22.2/surefire-junit-platform-2.22.2.pom (7.0 kB at 4.7 kB/s)
Downloading from aliyun: https://maven.aliyun.com/repository/public/org/apache/maven/surefire/surefire-providers/2.22.2/surefire-providers-2.22.2.pom
Downloaded from aliyun: https://maven.aliyun.com/repository/public/org/apache/maven/surefire/surefire-providers/2.22.2/surefire-providers-2.22.2.pom (2.5 kB at 5.5 kB/s)
Downloading from aliyun: https://maven.aliyun.com/repository/public/org/junit/platform/junit-platform-launcher/1.3.1/junit-platform-launcher-1.3.1.pom
Downloaded from aliyun: https://maven.aliyun.com/repository/public/org/junit/platform/junit-platform-launcher/1.3.1/junit-platform-launcher-1.3.1.pom (2.2 kB at 4.9 kB/s)
Downloading from aliyun: https://maven.aliyun.com/repository/public/org/apiguardian/apiguardian-api/1.0.0/apiguardian-api-1.0.0.pom
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Downloading from aliyun: https://maven.aliyun.com/repository/public/org/opentest4j/opentest4j/1.1.1/opentest4j-1.1.1.pom
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Downloading from aliyun: https://maven.aliyun.com/repository/public/org/apache/maven/surefire/surefire-junit-platform/2.22.2/surefire-junit-platform-2.22.2.jar
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Downloaded from aliyun: https://maven.aliyun.com/repository/public/org/apiguardian/apiguardian-api/1.0.0/apiguardian-api-1.0.0.jar (2.2 kB at 1.2 kB/s)
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[INFO]
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
[INFO] Running net.ameizi.k8s.example.K8sExampleApplicationTests
11:09:31.561 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating CacheAwareContextLoaderDelegate from class [org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate]
11:09:31.581 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating BootstrapContext using constructor [public org.springframework.test.context.support.DefaultBootstrapContext(java.lang.Class,org.springframework.test.context.CacheAwareContextLoaderDelegate)]
11:09:31.624 [main] DEBUG org.springframework.test.context.BootstrapUtils - Instantiating TestContextBootstrapper for test class [net.ameizi.k8s.example.K8sExampleApplicationTests] from class [org.springframework.boot.test.context.SpringBootTestContextBootstrapper]
11:09:31.653 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [net.ameizi.k8s.example.K8sExampleApplicationTests], using SpringBootContextLoader
11:09:31.659 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [net.ameizi.k8s.example.K8sExampleApplicationTests]: class path resource [net/ameizi/k8s/example/K8sExampleApplicationTests-context.xml] does not exist
11:09:31.660 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Did not detect default resource location for test class [net.ameizi.k8s.example.K8sExampleApplicationTests]: class path resource [net/ameizi/k8s/example/K8sExampleApplicationTestsContext.groovy] does not exist
11:09:31.660 [main] INFO org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [net.ameizi.k8s.example.K8sExampleApplicationTests]: no resource found for suffixes {-context.xml, Context.groovy}.
11:09:31.662 [main] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [net.ameizi.k8s.example.K8sExampleApplicationTests]: K8sExampleApplicationTests does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
11:09:31.734 [main] DEBUG org.springframework.test.context.support.ActiveProfilesUtils - Could not find an 'annotation declaring class' for annotation type [org.springframework.test.context.ActiveProfiles] and class [net.ameizi.k8s.example.K8sExampleApplicationTests]
11:09:31.858 [main] DEBUG org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider - Identified candidate component class: file [/Users/amz/develop/workspace/k8s-example/target/classes/net/ameizi/k8s/example/K8sExampleApplication.class]
11:09:31.859 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration net.ameizi.k8s.example.K8sExampleApplication for test class net.ameizi.k8s.example.K8sExampleApplicationTests
11:09:32.026 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - @TestExecutionListeners is not present for class [net.ameizi.k8s.example.K8sExampleApplicationTests]: using defaults.
11:09:32.027 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]
11:09:32.042 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttributeSource]
11:09:32.042 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Skipping candidate TestExecutionListener [org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener] due to a missing dependency. Specify custom listener classes or make the default listener classes and their required dependencies available. Offending class: [org/springframework/transaction/interceptor/TransactionAttribute]
11:09:32.043 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.web.ServletTestExecutionListener@5ba3f27a, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@58d75e99, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@74751b3, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@741a8937, org.springframework.test.context.support.DirtiesContextTestExecutionListener@306e95ec, org.springframework.test.context.event.EventPublishingTestExecutionListener@52af26ee, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@6fd83fc1, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@4f2b503c, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@bae7dc0, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@209da20d, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@e15b7e8]
11:09:32.046 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test class: context [DefaultTestContext@434a63ab testClass = K8sExampleApplicationTests, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [WebMergedContextConfiguration@6e0f5f7f testClass = K8sExampleApplicationTests, locations = '{}', classes = '{class net.ameizi.k8s.example.K8sExampleApplication}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true}', contextCustomizers = set[org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@48fa0f47, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@6d2a209c, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@4ddced80, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizerFactory$Customizer@76908cc0], resourceBasePath = 'src/main/webapp', contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]], attributes = map['org.springframework.test.context.web.ServletTestExecutionListener.activateListener' -> true]], class annotated with @DirtiesContext [false] with mode [null].
11:09:32.101 [main] DEBUG org.springframework.test.context.support.TestPropertySourceUtils - Adding inlined properties to environment: {spring.jmx.enabled=false, org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true, server.port=-1}
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.6.RELEASE)
2020-05-07 11:09:32.439 INFO 40881 --- [ main] n.a.k.e.K8sExampleApplicationTests : Starting K8sExampleApplicationTests on swfeng.local with PID 40881 (started by amz in /Users/amz/develop/workspace/k8s-example)
2020-05-07 11:09:32.440 INFO 40881 --- [ main] n.a.k.e.K8sExampleApplicationTests : No active profile set, falling back to default profiles: default
2020-05-07 11:09:34.552 INFO 40881 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-05-07 11:09:35.159 INFO 40881 --- [ main] o.s.b.a.e.web.EndpointLinksResolver : Exposing 13 endpoint(s) beneath base path '/actuator'
2020-05-07 11:09:35.242 INFO 40881 --- [ main] n.a.k.e.K8sExampleApplicationTests : Started K8sExampleApplicationTests in 3.126 seconds (JVM running for 4.349)
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 4.144 s - in net.ameizi.k8s.example.K8sExampleApplicationTests
2020-05-07 11:09:35.600 INFO 40881 --- [extShutdownHook] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO]
[INFO]
[INFO] --- maven-jar-plugin:3.1.2:jar (default-jar) @ k8s-example ---
[INFO] Building jar: /Users/amz/develop/workspace/k8s-example/target/k8s-example-1.0.0.jar
[INFO]
[INFO] --- spring-boot-maven-plugin:2.2.6.RELEASE:repackage (repackage) @ k8s-example ---
[INFO] Replacing main artifact with repackaged archive
[INFO]
[INFO] --- jib-maven-plugin:2.2.0:build (default) @ k8s-example ---
[INFO]
[INFO] Containerizing application to registry.hub.docker.com/aimeizi/k8s-example...
[WARNING] Base image 'openjdk:8-jdk-alpine' does not use a specific image digest - build may not be reproducible
[INFO] Getting manifest for base image openjdk:8-jdk-alpine...
[INFO] Building dependencies layer...
[INFO] Building resources layer...
[INFO] Building classes layer...
[INFO] Using credentials from Docker config (/Users/amz/.docker/config.json) for registry.hub.docker.com/aimeizi/k8s-example
[INFO] The base image requires auth. Trying again for openjdk:8-jdk-alpine...
[WARNING] The credential helper (docker-credential-desktop) has nothing for server URL: registry-1.docker.io
Got output:
credentials not found in native keychain
[INFO] Using credentials from Docker config (/Users/amz/.docker/config.json) for openjdk:8-jdk-alpine
[INFO] Using base image with digest: sha256:44b3cea369c947527e266275cee85c71a81f20fc5076f6ebb5a13f19015dce71
[INFO]
[INFO] Container entrypoint set to [java, -cp, /app/resources:/app/classes:/app/libs/*, net.ameizi.k8s.example.K8sExampleApplication]
[INFO]
[INFO] Built and pushed image as registry.hub.docker.com/aimeizi/k8s-example
[INFO]
[INFO]
[INFO] --- jib-maven-plugin:2.2.0:dockerBuild (default-cli) @ k8s-example ---
[INFO]
[INFO] Containerizing application to Docker daemon as registry.hub.docker.com/aimeizi/k8s-example...
[WARNING] Base image 'openjdk:8-jdk-alpine' does not use a specific image digest - build may not be reproducible
[INFO] Getting manifest for base image openjdk:8-jdk-alpine...
[INFO] Building dependencies layer...
[INFO] Building resources layer...
[INFO] Building classes layer...
[INFO] The base image requires auth. Trying again for openjdk:8-jdk-alpine...
[WARNING] The credential helper (docker-credential-desktop) has nothing for server URL: registry-1.docker.io
Got output:
credentials not found in native keychain
[INFO] Using credentials from Docker config (/Users/amz/.docker/config.json) for openjdk:8-jdk-alpine
[INFO] Using base image with digest: sha256:44b3cea369c947527e266275cee85c71a81f20fc5076f6ebb5a13f19015dce71
[INFO]
[INFO] Container entrypoint set to [java, -cp, /app/resources:/app/classes:/app/libs/*, net.ameizi.k8s.example.K8sExampleApplication]
[INFO] Loading to Docker daemon...
[INFO]
[INFO] Built image to Docker daemon as registry.hub.docker.com/aimeizi/k8s-example
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 03:12 min
[INFO] Finished at: 2020-05-07T11:12:33+08:00
[INFO] ------------------------------------------------------------------------
Tags used in deployment:
- registry.hub.docker.com/aimeizi/k8s-example -> registry.hub.docker.com/aimeizi/k8s-example:1ab1c78361f6855399f7865c3abb1b8bc6693cfc6b90edcd37fa81a98379668b
Starting deploy...
- deployment.apps/k8s-example created
- service/k8s-example created
Waiting for deployments to stabilize...
- deployment/k8s-example: waiting for rollout to finish: 0 of 1 updated replicas are available...
- deployment/k8s-example is ready.
Deployments stabilized in 1.262264304s
Port forwarding service/k8s-example in namespace default, remote port 80 -> address 127.0.0.1 port 4503
Watching for changes...
[k8s-example-8469866549-s8v6s k8s-example]
[k8s-example-8469866549-s8v6s k8s-example] . ____ _ __ _ _
[k8s-example-8469866549-s8v6s k8s-example] /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
[k8s-example-8469866549-s8v6s k8s-example] ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
[k8s-example-8469866549-s8v6s k8s-example] \\/ ___)| |_)| | | | | || (_| | ) ) ) )
[k8s-example-8469866549-s8v6s k8s-example] ' |____| .__|_| |_|_| |_\__, | / / / /
[k8s-example-8469866549-s8v6s k8s-example] =========|_|==============|___/=/_/_/_/
[k8s-example-8469866549-s8v6s k8s-example] :: Spring Boot :: (v2.2.6.RELEASE)
[k8s-example-8469866549-s8v6s k8s-example]
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:38.122 INFO 1 --- [ restartedMain] n.a.k8s.example.K8sExampleApplication : Starting K8sExampleApplication on k8s-example-8469866549-s8v6s with PID 1 (/app/classes started by root in /)
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:38.128 INFO 1 --- [ restartedMain] n.a.k8s.example.K8sExampleApplication : No active profile set, falling back to default profiles: default
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:38.208 INFO 1 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:38.208 INFO 1 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:39.900 INFO 1 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:39.922 INFO 1 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:39.922 INFO 1 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.33]
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:40.022 INFO 1 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:40.022 INFO 1 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1814 ms
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:40.922 INFO 1 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:41.226 INFO 1 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:41.236 INFO 1 --- [ restartedMain] o.s.b.a.e.web.EndpointLinksResolver : Exposing 13 endpoint(s) beneath base path '/actuator'
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:41.336 INFO 1 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
[k8s-example-8469866549-s8v6s k8s-example] 2020-05-07 03:12:41.346 INFO 1 --- [ restartedMain] n.a.k8s.example.K8sExampleApplication : Started K8sExampleApplication in 3.714 seconds (JVM running for 4.57)
```
根据日志输出发现`Port forwarding service/k8s-example in namespace default, remote port 80 -> address 127.0.0.1 port 4503`。
```bash
$ curl http://127.0.0.1:4503/hello
hello,kubernetes!
```
修改应用中的代码，并再次观察其输出
```bash
$ curl http://127.0.0.1:4503/hello
hello,Skaffold!
```
发现，程序修改后会自动重新构建并部署应用。
当`skaffold`进程结束后会自动清理
```
^CCleaning up...
WARN[0802] signal: interrupt
- deployment.apps "k8s-example" deleted
- service "k8s-example" deleted
```
执行 debug
```bash
$ skaffold debug --port-forward
Listing files to watch...
Generating tags...
- registry.hub.docker.com/aimeizi/k8s-example -> registry.hub.docker.com/aimeizi/k8s-example:latest
Some taggers failed. Rerun with -vdebug for errors.
Checking cache...
- registry.hub.docker.com/aimeizi/k8s-example: Found Locally
Tags used in deployment:
- registry.hub.docker.com/aimeizi/k8s-example -> registry.hub.docker.com/aimeizi/k8s-example:8c60b1d982f01598222d196f322372427252593e6de28599f49cca8a45ea3229
Starting deploy...
- deployment.apps/k8s-example created
- service/k8s-example created
Waiting for deployments to stabilize...
- deployment/k8s-example: waiting for rollout to finish: 0 of 1 updated replicas are available...
- deployment/k8s-example is ready.
Deployments stabilized in 1.845665959s
Port forwarding service/k8s-example in namespace default, remote port 80 -> address 127.0.0.1 port 4503
Watching for changes...
Port forwarding pod/k8s-example-5fbc9ff88b-pdv8m in namespace default, remote port 5005 -> address 127.0.0.1 port 5005
[k8s-example-5fbc9ff88b-pdv8m k8s-example] Picked up JAVA_TOOL_OPTIONS: -agentlib:jdwp=transport=dt_socket,server=y,address=5005,suspend=n,quiet=y
[k8s-example-5fbc9ff88b-pdv8m k8s-example]
[k8s-example-5fbc9ff88b-pdv8m k8s-example] . ____ _ __ _ _
[k8s-example-5fbc9ff88b-pdv8m k8s-example] /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
[k8s-example-5fbc9ff88b-pdv8m k8s-example] ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
[k8s-example-5fbc9ff88b-pdv8m k8s-example] \\/ ___)| |_)| | | | | || (_| | ) ) ) )
[k8s-example-5fbc9ff88b-pdv8m k8s-example] ' |____| .__|_| |_|_| |_\__, | / / / /
[k8s-example-5fbc9ff88b-pdv8m k8s-example] =========|_|==============|___/=/_/_/_/
[k8s-example-5fbc9ff88b-pdv8m k8s-example] :: Spring Boot :: (v2.2.6.RELEASE)
[k8s-example-5fbc9ff88b-pdv8m k8s-example]
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:27.077 INFO 1 --- [ restartedMain] n.a.k8s.example.K8sExampleApplication : Starting K8sExampleApplication on k8s-example-5fbc9ff88b-pdv8m with PID 1 (/app/classes started by root in /)
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:27.090 INFO 1 --- [ restartedMain] n.a.k8s.example.K8sExampleApplication : No active profile set, falling back to default profiles: default
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:27.202 INFO 1 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:27.205 INFO 1 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:28.990 INFO 1 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:29.010 INFO 1 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:29.010 INFO 1 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.33]
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:29.115 INFO 1 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:29.115 INFO 1 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1905 ms
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:30.167 INFO 1 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:30.650 INFO 1 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:30.664 INFO 1 --- [ restartedMain] o.s.b.a.e.web.EndpointLinksResolver : Exposing 13 endpoint(s) beneath base path '/actuator'
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:30.806 INFO 1 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
[k8s-example-5fbc9ff88b-pdv8m k8s-example] 2020-05-07 03:24:30.818 INFO 1 --- [ restartedMain] n.a.k8s.example.K8sExampleApplication : Started K8sExampleApplication in 4.549 seconds (JVM running for 5.451)
```
根据日志输出，在 ide 中进行设置即可
```
-agentlib:jdwp=transport=dt_socket,server=y,address=5005,suspend=n,quiet=y
```
浏览器地址栏输入`http://127.0.0.1:4503/hello`即可进入断点模式
### Kustomize
执行如下命令创建目录
```bash
$ mkdir -p kustomize/base
$ mv k8s/* kustomize/base
$ rm -Rf k8s
```
在`kustomize/base`目录下创建`kustomization.yaml`文件，其内容为
```yaml
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
- service.yaml
- deployment.yaml
```
在`kustomize/qa`目录下创建`update-replicas.yaml`文件，其内容为
```bash
apiVersion: apps/v1
kind: Deployment
metadata:
name: k8s-example
spec:
replicas: 2
```
在`kustomize/qa`目录下创建`kustomization.yaml`文件，其内容为
```yaml
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
- ../base
patchesStrategicMerge:
- update-replicas.yaml
```
运行 Kustomize
执行构建
```bash
$ kustomize build ./kustomize/base
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: k8s-example
name: k8s-example
spec:
ports:
- name: 80-8080
port: 80
protocol: TCP
targetPort: 8080
selector:
app: k8s-example
type: LoadBalancer
status:
loadBalancer: {}
---
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: k8s-example
name: k8s-example
spec:
replicas: 1
selector:
matchLabels:
app: k8s-example
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: k8s-example
spec:
containers:
- image: registry.hub.docker.com/aimeizi/k8s-example:latest
name: k8s-example
resources: {}
status: {}
```
```bash
$ kustomize build ./kustomize/qa
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: k8s-example
name: k8s-example
spec:
ports:
- name: 80-8080
port: 80
protocol: TCP
targetPort: 8080
selector:
app: k8s-example
type: LoadBalancer
status:
loadBalancer: {}
---
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: k8s-example
name: k8s-example
spec:
replicas: 2
selector:
matchLabels:
app: k8s-example
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: k8s-example
spec:
containers:
- image: registry.hub.docker.com/aimeizi/k8s-example:latest
name: k8s-example
resources: {}
status: {}
```
部署应用服务
```bash
$ kustomize build kustomize/qa | kubectl apply -f -
service/k8s-example created
deployment.apps/k8s-example created
```
查看状态
```bash
$ watch -n 1 kubectl get all
Every 1.0s: kubectl get all swfeng.local: Thu May 7 15:48:05 2020
NAME READY STATUS RESTARTS AGE
pod/k8s-example-664b9f68d4-qzfqs 1/1 Running 0 116s
pod/k8s-example-664b9f68d4-s7xv7 1/1 Running 0 116s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/k8s-example LoadBalancer 10.100.196.38 localhost 80:32689/TCP 116s
service/kubernetes ClusterIP 10.96.0.1 443/TCP 15d
```
运行测试
```bash
$ curl http://127.0.0.1/hello
hello,Skaffold!
```
此时发现`k8s-example`在两个Pod间具有LoadBalancer
清理资源
```bash
$ kustomize build kustomize/qa | kubectl delete -f -
```
### Kustomize 整合 Skaffold
默认情况下`Skaffold`使用`kubectl`部署应用，可以修改使用`kustomize`来部署应用。其具体操作如下，修改`skaffold.yaml`配置文件内容如下所示：
```yaml
apiVersion: skaffold/v2beta3
kind: Config
metadata:
name: k-s-example
build:
artifacts:
- image: registry.hub.docker.com/aimeizi/k8s-example
jib:
project: net.ameizi:k8s-example
deploy:
# kubectl:
# manifests:
# - k8s/deployment.yaml
# - k8s/service.yaml
kustomize:
paths: ["kustomize/base"]
profiles:
- name: qa
deploy:
kustomize:
paths: ["kustomize/qa"]
```
即修改deploy的kubectl属性为kustomize
测试Skaffold整合Kustomize后的效果
```bash
$ skaffold dev
```
注：以上命令默认执行`kustomize/base`目录下的配置
```bash
$ skaffold dev -p qa
```
注：以上命令执行`kustomize/qa`目录下的配置
### kt-connect本地联调
检查版本信息
```bash
$ ktctl --version
KT Connect version kt-0.0.12
```
启动ktctl
```bash
$ sudo ktctl -d connect --method socks5
Password:
4:13PM INF Connect Start At 58263
4:13PM INF Client address 172.24.202.121
4:13PM INF deploy shadow deployment kt-connect-daemon-qocry in namespace default
4:13PM INF pod label: kt=kt-connect-daemon-qocry
4:13PM INF pod: kt-connect-daemon-qocry-5f976c8848-nzn67 is running,but not ready
4:13PM INF pod: kt-connect-daemon-qocry-5f976c8848-nzn67 is running,but not ready
4:13PM INF pod: kt-connect-daemon-qocry-5f976c8848-nzn67 is running,but not ready
4:13PM INF Shadow pod: kt-connect-daemon-qocry-5f976c8848-nzn67 is ready.
4:13PM INF Fail to get pod cidr from node.Spec.PODCIDR, try to get with pod sample
4:13PM DBG Child, os.Args = [ktctl -d connect --method socks5]
4:13PM DBG Child, cmd.Args = [kubectl --kubeconfig=/Users/amz/.kube/config -n default port-forward kt-connect-daemon-qocry-5f976c8848-nzn67 2222:22]
Forwarding from 127.0.0.1:2222 -> 22
Forwarding from [::1]:2222 -> 22
4:13PM INF port-forward start at pid: 58266
4:13PM INF ==============================================================
4:13PM INF Start SOCKS5 Proxy: export http_proxy=socks5://127.0.0.1:2223
4:13PM INF ==============================================================
4:13PM DBG Child, os.Args = [ktctl -d connect --method socks5]
4:13PM DBG Child, cmd.Args = [ssh -oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -i /Users/amz/.kt_id_rsa -D 2223 [email protected] -p2222 sh loop.sh]
Handling connection for 2222
Warning: Permanently added '[127.0.0.1]:2222' (ECDSA) to the list of known hosts.
4:13PM INF vpn(ssh) start at pid: 58268
4:13PM INF KT proxy start successful
```
根据日志输出在终端设置`http_proxy`环境变量，然后使用`CLUSTER-IP:PORT`访问应用
查看服务端口映射信息
```bash
$ watch -n 1 kubectl get all
Every 1.0s: kubectl get all swfeng.local: Thu May 7 16:17:54 2020
NAME READY STATUS RESTARTS AGE
pod/k8s-example-55697bcd6b-kwzhf 1/1 Running 0 5m18s
pod/kt-connect-daemon-izhxa-6f95f75678-k578z 1/1 Running 0 7m38s
pod/kt-connect-daemon-qocry-5f976c8848-nzn67 1/1 Running 0 4m34s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/k8s-example LoadBalancer 10.100.27.20 localhost 80:32106/TCP 5m18s
service/kubernetes ClusterIP 10.96.0.1 443/TCP 15d
```
命令行验证
```bash
$ export http_proxy=socks5://127.0.0.1:2223
$ curl http://10.100.27.20:80/hello
hello,Skaffold!
```
IDEA中与Kubernetes集群中的程序联调
ktctl在socks5模式下，会自动在当前路径下生成.jvmrc文件，该文件中会包含SOCKS5代理的相关JVM参数。其内容如下所示：
```
-DsocksProxyHost=127.0.0.1
-DsocksProxyPort=2223
```
在 ide 中安装`JVM Inject`插件，在IDEA中启动Java程序时，该插件会自动加载当前项目根路径下的.jvmrc并追加到Java的启动参数中。具体如下所示
```
/Library/Java/JavaVirtualMachines/jdk1.8.0_201.jdk/Contents/Home/bin/java -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:52776,suspend=y,server=n -Dvisualvm.id=90478590646964 -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true -DsocksProxyHost=127.0.0.1 -DsocksProxyPort=2223
```
之后可以在 ide 中直接访问k8s中的服务。
### 远程调试
```
FROM openjdk:8-jdk-alpine
VOLUME /tmp
ADD target/app.jar target/app.jar
ENTRYPOINT ["java","-agentlib:jdwp=transport=dt_socket,address=5005,server=y,suspend=n","-Djava.security.egd=file:/dev/./urandom","-Xms2g","-Xmx8g","-jar","target/app.jar"]
```
在 Service 中暴露端口
如本例可修改为
```yaml
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: k8s-example
name: k8s-example
spec:
ports:
- name: 80-8080
port: 80
protocol: TCP
targetPort: 8080
- name: 5005-5005
port: 5005
protocol: TCP
targetPort: 5005
selector:
app: k8s-example
type: LoadBalancer # LoadBalancer 不需要kubectl port-forward 直接用映射出来的 IP 和端口访问
status:
loadBalancer: {}
```
### 参考文档
https://hackmd.io/@ryanjbaxter/spring-on-k8s-workshop
https://spring.io/blog/2020/01/27/creating-docker-images-with-spring-boot-2-3-0-m1
https://github.com/alibaba/kt-connect
http://ylzheng.com/2019/12/14/how-to-integration-with-kubernetes-from-idea/
https://itnext.io/remote-debugging-spring-boot-on-kubernetes-a5f96a40e5c0