안녕하세요 🙂 Resilience4J 를 학습한 후 실무에 적용해보려 하는 주니어 백엔드 개발자입니다.제가 생각하는 예시가 서킷 브레이커를 도입하기 적절한 예시인지 궁금해서 질문을 남깁니다!  현재 제가 고려하는 상황입니다.A 서버 혹은 B 서버로 요청을 보내도 되는 상황 (A서버로 요청 보내는 것이 비용이 저렴하기 때문에 기본적으로 A사 요청)A사로 요청을 보냈지만 장애 발생 -> 서킷 OPEN 상태로 변경 서킷이 OPEN일 때 B 서버로 요청HALF OPEN일 때 A서버로 요청을 보냄A서버에서 정상적인 응답이 올 경우 서킷 CLOSE이러한 방식으로 Resilience4J를 도입하려고 하는데, resilience4J가 개발된 의도에 맞게 사용하는걸까요?혹시 아니라면, 다른 어떤 방법을 사용하면 좋을지 궁금해서 질문 남기게 되었습니다

만약 스프링 부트 서버용 EC2 한 개만 운용한다면 굳이 로드밸런서를 설정하지 않아도 괜찮을까요? 그리고 만약 스프링부트 서버용 EC2를 2, 3개 더 만든다면 프리티어단계에선 탄력적 IP에 대한 요금만 부과되는 것인지, EC2 인스턴스 갯수만큼 요금이 나오는 것인지 궁금합니다.

21분 쯤에 말씀하신게 mvc 모델에서 M 쪽이 비지니스레이어 아래쪽이 아닌C -> V로 보낼때 즉 dto나 vo가 M이라고 하시는건가요? 그럼 혹시 비즈니스 레이어 mvc 별개로 서비스 계층과퍼시스턴스 레이어는 데이터 엑세스 계층으로 생각해야될까요?

#!/bin/bash git clone -b 5_1_monolithic_s3 https://github.com/burger-2023/aws-operation-prac.git cd /aws-operation-prac ./gradlew build sudo java -jar build/libs/aws-msa-monolithic-prac-0.1.jar \ --spring.datasource.url=jdbc:postgresql://비밀:5432/geonmin_database \ --spring.datasource.username=postgres \ --spring.datasource.password=postgress \ --cloud.aws.s3.bucket=geonmin-bucket-test \ --cloud.aws.region.static=us-east-1빌드까지는 잘되는거 같은데 마지막줄이 오류납니다 ㅜㅠ 원인을 모르겠어요 그리고 강사님이 밑에 써준 스크립트 예시에 버킷 들어가기전에 \ 하나가 빠진거 같아요

제가 강의를 따라하면서 설치를 잘 못하여서 sc delete RabbitMQ명령어를 사용했고 이후 재설치하여 진행을 하는데 아래와 같이 실패를 하고 있습니다.그래서 호환이 문제이가 싶어서 github에서 버전호환으로 다시 시도를 해도 같은 문제가 발생합니다.RabbitMQ 커멘드로 삭제 다운 실행 관련 명령어를 사용해도 권한 문제가 발생을 했고, 관리자 모드로 명령어를 날려도 권한 문제가 발생했습니다. 혹시 몰라서 cmd 관리자 권한으로 날려도, RabbitMQ-server에 sbin이라는 위치로 들어가서 명령어를 날려도 같습니다.https://stackoverflow.com/questions/16001047/rabbitmq-fails-to-start위 stackoverflow에서 관련 정보를 찾아서 진행을 했는데 같은 문제가 발생 됩니다.  지금 한 3시간 정도 삽질을 하니 진이 빠지네요.. 도와주세욥...

영상처럼 시작 템플릿 바꾸고 오토스케일링 그룹 설정 새로운버전으로 바꾸고 로드밸런서 dns 주소로 health체크를 해봤는데 502에러가 뜨고 안되서 여러가지 다 확인해봤는데ec2 만들어지고 git clone 자체가 안되었더라고요 사용자 데이터 명령어 자체가 실행이 안됩니다 직접 들어가서 명령어를 치면 먹습니다 네트워크 문제도아니고 패키지 다운로드 안한것도 아닌데 사용자 데이터 명령어가 git clone 시작도 안되면 어떻게 해결해야될까요?  git clone은 되었지만 괜한 root 계정 밑에서만 조회해서 못봤던거... 강사님 해결해주셔서 감사합니다!

harbor 디렉토리에서 ./prepare을 실행시키면 prepare base dir is set to /root/harborWARNING: The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requestedexec /usr/bin/python3: invalid argument이러한 오류 메시지가 발생하여 이미지가 pull이 안되는 문제가 생깁니다.

docker container -> 쿠버네티스 로만 클라우드 환경 구성할 수 있는 것으로 파악하고 있는데요, 수업볼때 2023년 버전만 봐도 될까요?아니면 과거 버전도 모두 봐야지만 2023년 버전을 이해할 수 있나요?

어제 주키퍼 서버, 카프카 서버, 카프카 커넥트까지 정상적으로 동작했고 DB에서 데이터 등록 시 토픽 생성이 안되어 모두 삭제하고 재설치, 그리고 강사님이 올려주신 파일로도 해봤는데 주키퍼 서버 기동하면 포트 중복 오류가 뜹니다. 사용중인 포트도 없고 기본 포트번호를 바꿔봐도 똑같은 오류가 나오고 있습니다..[2024-09-01 22:44:51,121] INFO Server environment:java.io.tmpdir=C:\Users\PC\AppData\Local\Temp\ (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,122] INFO Server environment:java.compiler=<NA> (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,122] INFO Server environment:os.name=Windows 10 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,123] INFO Server environment:os.arch=amd64 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,127] INFO Server environment:os.version=10.0 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,128] INFO Server environment:user.name=PC (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,128] INFO Server environment:user.home=C:\Users\PC (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,129] INFO Server environment:user.dir=C:\Work\kafka_2.12-3.4.0 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,130] INFO Server environment:os.memory.free=494MB (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,131] INFO Server environment:os.memory.max=512MB (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,131] INFO Server environment:os.memory.total=512MB (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,132] INFO zookeeper.enableEagerACLCheck = false (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,132] INFO zookeeper.digest.enabled = true (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,133] INFO zookeeper.closeSessionTxn.enabled = true (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,134] INFO zookeeper.flushDelay=0 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,135] INFO zookeeper.maxWriteQueuePollTime=0 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,135] INFO zookeeper.maxBatchSize=1000 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,136] INFO zookeeper.intBufferStartingSizeBytes = 1024 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,138] INFO Weighed connection throttling is disabled (org.apache.zookeeper.server.BlueThrottle) [2024-09-01 22:44:51,140] INFO minSessionTimeout set to 6000 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,140] INFO maxSessionTimeout set to 60000 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,143] INFO Response cache size is initialized with value 400. (org.apache.zookeeper.server.ResponseCache) [2024-09-01 22:44:51,143] INFO Response cache size is initialized with value 400. (org.apache.zookeeper.server.ResponseCache) [2024-09-01 22:44:51,145] INFO zookeeper.pathStats.slotCapacity = 60 (org.apache.zookeeper.server.util.RequestPathMetricsCollector) [2024-09-01 22:44:51,145] INFO zookeeper.pathStats.slotDuration = 15 (org.apache.zookeeper.server.util.RequestPathMetricsCollector) [2024-09-01 22:44:51,146] INFO zookeeper.pathStats.maxDepth = 6 (org.apache.zookeeper.server.util.RequestPathMetricsCollector) [2024-09-01 22:44:51,147] INFO zookeeper.pathStats.initialDelay = 5 (org.apache.zookeeper.server.util.RequestPathMetricsCollector) [2024-09-01 22:44:51,147] INFO zookeeper.pathStats.delay = 5 (org.apache.zookeeper.server.util.RequestPathMetricsCollector) [2024-09-01 22:44:51,148] INFO zookeeper.pathStats.enabled = false (org.apache.zookeeper.server.util.RequestPathMetricsCollector) [2024-09-01 22:44:51,151] INFO The max bytes for all large requests are set to 104857600 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,152] INFO The large request threshold is set to -1 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,153] INFO Created server with tickTime 3000 minSessionTimeout 6000 maxSessionTimeout 60000 clientPortListenBacklog -1 datadir \tmp\zookeeper\version-2 snapdir \tmp\zookeeper\version-2 (org.apache.zookeeper.server.ZooKeeperServer) [2024-09-01 22:44:51,197] INFO Using org.apache.zookeeper.server.NIOServerCnxnFactory as server connection factory (org.apache.zookeeper.server.ServerCnxnFactory) [2024-09-01 22:44:51,199] WARN maxCnxns is not configured, using default value 0. (org.apache.zookeeper.server.ServerCnxnFactory) [2024-09-01 22:44:51,201] INFO Configuring NIO connection handler with 10s sessionless connection timeout, 2 selector thread(s), 24 worker threads, and 64 kB direct buffers. (org.apache.zookeeper.server.NIOServerCnxnFactory) [2024-09-01 22:44:51,208] INFO binding to port 0.0.0.0/0.0.0.0:2181 (org.apache.zookeeper.server.NIOServerCnxnFactory) [2024-09-01 22:44:51,210] ERROR Unexpected exception, exiting abnormally (org.apache.zookeeper.server.ZooKeeperServerMain) java.net.BindException: Address already in use: bind at java.base/sun.nio.ch.Net.bind0(Native Method) at java.base/sun.nio.ch.Net.bind(Net.java:555) at java.base/sun.nio.ch.ServerSocketChannelImpl.netBind(ServerSocketChannelImpl.java:337) at java.base/sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:294) at java.base/sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:89) at java.base/sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:81) at org.apache.zookeeper.server.NIOServerCnxnFactory.configure(NIOServerCnxnFactory.java:676) at org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:158) at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:112) at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:67) at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:140) at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:90) [2024-09-01 22:44:51,214] INFO ZooKeeper audit is disabled. (org.apache.zookeeper.audit.ZKAuditProvider) [2024-09-01 22:44:51,218] ERROR Exiting JVM with code 1 (org.apache.zookeeper.util.ServiceUtils) 

강사님 강의 잘듣고 있습니다.한가지 궁금점은 유레카 서버를 별도로 올리지 않아도 api-gate-way에서 first-service, secound-service라우팅 및 필터가 가능한데 이떄 유레카의 용도가 무엇인기 궁금합니다. 유레카 서버로 부터 연결된 유레카 클라이언트 정보를 얻는다고 했는데... 유레카 서버를 off해도 routing은 정상적으로 이루어지더라구요 .. 제가 뭔가 잘못 이해하고 있는 부분이 있을까요?

시작 템플릿 - 유저 데이터에 write와 read 설정하고 오토스케일링 돌렸는데 에러가 납니다. 시작 템플릿에서 테스트로 인스턴스 생성해서 확인해보니 write는 문제 없는데 read에서 에러가 나옵니다. (여러번 설정해봄)ssh 접속해서 아래부분 실행 시 에러... 무슨 문제 일까요?java -jar build/libs/aws-msa-monolithic-prac-0.1.jar \ --spring.datasource.write.jdbc-url=jdbc:postgresql://goopang-rds-db.*****.ap-northeast-2.rds.amazonaws.com:5432:goopang_database \ --spring.datasource.write.username=postgres \ --spring.datasource.write.password=**** \ --spring.datasource.read.jdbc-url=jdbc:postgresql://goopang-rds-db-read-replica.****.ap-northeast-2.rds.amazonaws.com:5432:goopang_database \ --spring.datasource.read.username=postgres \ --spring.datasource.read.password=****2024-08-31T02:10:00.841Z ERROR 2333 --- [ main] j.LocalContainerEntityManagerFactoryBean : Failed to initialize JPA EntityManagerFactory: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] due to: Unable to determine Dialect without JDBC metadata (please set 'javax.persistence.jdbc.url', 'hibernate.connection.url', or 'hibernate.dialect') 2024-08-31T02:10:00.907Z ERROR 2333 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] due to: Unable to determine Dialect without JDBC metadata (please set 'javax.persistence.jdbc.url', 'hibernate.connection.url', or 'hibernate.dialect') at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1770) ~[spring-beans-6.0.9.jar!/:6.0.9] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:598) ~[spring-beans-6.0.9.jar!/:6.0.9] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:520) ~[spring-beans-6.0.9.jar!/:6.0.9] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.9.jar!/:6.0.9] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.9.jar!/:6.0.9] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.9.jar!/:6.0.9] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.9.jar!/:6.0.9] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1156) ~[spring-context-6.0.9.jar!/:6.0.9] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:931) ~[spring-context-6.0.9.jar!/:6.0.9] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:608) ~[spring-context-6.0.9.jar!/:6.0.9] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.1.0.jar!/:3.1.0] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:733) ~[spring-boot-3.1.0.jar!/:3.1.0] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:435) ~[spring-boot-3.1.0.jar!/:3.1.0] at org.springframework.boot.SpringApplication.run(SpringApplication.java:311) ~[spring-boot-3.1.0.jar!/:3.1.0] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1305) ~[spring-boot-3.1.0.jar!/:3.1.0] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1294) ~[spring-boot-3.1.0.jar!/:3.1.0] at com.prac.monolithic.awsmsamonolithicprac.AwsMsaMonolithicPracApplicationKt.main(AwsMsaMonolithicPracApplication.kt:13) ~[classes!/:0.1] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:569) ~[na:na] at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49) ~[aws-msa-monolithic-prac-0.1.jar:0.1] at org.springframework.boot.loader.Launcher.launch(Launcher.java:95) ~[aws-msa-monolithic-prac-0.1.jar:0.1] at org.springframework.boot.loader.Launcher.launch(Launcher.java:58) ~[aws-msa-monolithic-prac-0.1.jar:0.1] at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:65) ~[aws-msa-monolithic-prac-0.1.jar:0.1] Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment] due to: Unable to determine Dialect without JDBC metadata (please set 'javax.persistence.jdbc.url', 'hibernate.connection.url', or 'hibernate.dialect') at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:277) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:239) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:216) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.boot.model.relational.Database.<init>(Database.java:45) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.getDatabase(InFlightMetadataCollectorImpl.java:229) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:197) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:166) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.metadata(EntityManagerFactoryBuilderImpl.java:1380) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1451) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:66) ~[spring-orm-6.0.9.jar!/:6.0.9] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:376) ~[spring-orm-6.0.9.jar!/:6.0.9] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:409) ~[spring-orm-6.0.9.jar!/:6.0.9] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:396) ~[spring-orm-6.0.9.jar!/:6.0.9] at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:352) ~[spring-orm-6.0.9.jar!/:6.0.9] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1816) ~[spring-beans-6.0.9.jar!/:6.0.9] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1766) ~[spring-beans-6.0.9.jar!/:6.0.9] ... 24 common frames omitted Caused by: org.hibernate.HibernateException: Unable to determine Dialect without JDBC metadata (please set 'javax.persistence.jdbc.url', 'hibernate.connection.url', or 'hibernate.dialect') at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:188) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:87) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:274) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:34) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:119) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:264) ~[hibernate-core-6.2.2.Final.jar!/:6.2.2.Final] ... 39 common frames omitted 2024-08-31 02:10:01,061 - cc_scripts_user.py[WARNING]: Failed to run module scripts-user (scripts in /var/lib/cloud/instance/scripts) 2024-08-31 02:10:01,064 - util.py[WARNING]: Running module scripts-user (<module 'cloudinit.config.cc_scripts_user' from '/usr/lib/python3.9/site-packages/cloudinit/config/cc_scripts_user.py'>) failed Cloud-init v. 22.2.2 finished at Sat, 31 Aug 2024 02:10:01 +0000. Datasource DataSourceEc2. Up 122.75 seconds [root@ip-10-0-1-8 aws-operation-prac]#   

docker stack services my-stack 이러한 명령어로 스택에 있는 서비스를 확인했을 때, replicas가 생기지 않는 문제가 발생합니다. docker service logs my-stack_nginx으로 로그를 확인했을 때, "my-stack_nginx.1.e52u87cn5fsb@65b1999ee81f    | exec /docker-entrypoint.sh: invalid argument" 라는 오류 메시가 발생합니다.

user-service에선 정상적으로 실행되지만 api 게이트웨이 오류가 납니다. 403 오류입니다 인강에서 token secret값이 주석 처리 되어 있는데 실제로 인강에선 어떻게 실행된지 궁금합니다.

Kafka, Kafka Connecet를 설치하기 부담스러우신 분들을 위해 제가 직접 이미지를 만들었습니다.https://hub.docker.com/r/didrkd684/inflearn-spring-cloud-kafka DB까지 docker compose로 사용하고 싶으신 분들은 아래 링크를 참고해 주시기 바랍니다.https://github.com/chocolaggibbiddori/spring-cloud/blob/main/kafka-docker/docker-compose.yml

authentication-server는 어떤역활인가요?강의 마지막에 볼때..클라이언트가 GateWay-server에 요청할경우 config-server 와 Eureka-server를 보내고아이템서비스와 히스토리 서비스에 데이터 전달하는데authentication-server는 아이템서비스로 봐야하는지아니면 별도의 서버인지 궁금합니다.14장 pdf파일에 두번째 그림보고 궁금해서 문의드립니다.제가 느끼기엔 item-microservice와 유사한 기능이라 생각됩니다만.. 제가 이해하는게 맞을까요?

vmware는 os전체를 가상화하고docker는 hostos의 커널을 공유하고 os가 아닌 일부분만 가상화 한다고 했는데...어떻게 macos에서 리눅스가 실행될 수 있는것일까요?이론적으로 같은 운영체제만 가상화 가능할것 아닌가요?

024-08-22T15:34:50.384+09:00 WARN [mstudy,,] 21188 --- [mstudy] [ restartedMain] [ ] z.r.AsyncReporter$BoundedAsyncReporter : Timed out waiting for in-flight spans to send2024-08-22T15:34:50.386+09:00 INFO [mstudy,,] 21188 --- [mstudy] [ restartedMain] [ ] o.apache.catalina.core.StandardService : Stopping service [Tomcat]2024-08-22T15:34:50.412+09:00 INFO [mstudy,,] 21188 --- [mstudy] [ restartedMain] [ ] .s.b.a.l.ConditionEvaluationReportLogger :Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.2024-08-22T15:34:50.427+09:00 ERROR [mstudy,,] 21188 --- [mstudy] [ restartedMain] [ ] o.s.boot.SpringApplication : Application run failedorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'activeMQConfig': Injection of autowired dependencies failedat org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:514) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1421) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:599) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:337) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:335) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:975) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:962) ~[spring-context-6.1.10.jar:6.1.10]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:624) ~[spring-context-6.1.10.jar:6.1.10]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.2.7.jar:3.2.7]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.2.7.jar:3.2.7]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.2.7.jar:3.2.7]at org.springframework.boot.SpringApplication.run(SpringApplication.java:335) ~[spring-boot-3.2.7.jar:3.2.7]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1363) ~[spring-boot-3.2.7.jar:3.2.7]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1352) ~[spring-boot-3.2.7.jar:3.2.7]at com.study.mstudy.MstudyApplication.main(MstudyApplication.java:12) ~[classes/:na]at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[na:na]at java.base/java.lang.reflect.Method.invoke(Method.java:578) ~[na:na]at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:50) ~[spring-boot-devtools-3.2.7.jar:3.2.7]Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'spring.activemq.broker.url' in value "${spring.activemq.broker.url}"at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:180) ~[spring-core-6.1.10.jar:6.1.10]at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:126) ~[spring-core-6.1.10.jar:6.1.10]at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:239) ~[spring-core-6.1.10.jar:6.1.10]at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210) ~[spring-core-6.1.10.jar:6.1.10]at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:200) ~[spring-context-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:964) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1374) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1353) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:784) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:767) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:145) ~[spring-beans-6.1.10.jar:6.1.10]at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:508) ~[spring-beans-6.1.10.jar:6.1.10]... 20 common frames omittedProcess finished with exit code 0에러 나옵니다.이강의 요약하면..먼저config-server에서 active-mq.yml파일 생성합니다.activemq:broker:url: tcp://localhost:61616topic: mstudy그다음 history-server와 item-server에 import를 해줍니다.hisotry-server에 config환경설정하고item-server?에? config파일했습니다만.item-server만 저러는데..왜 연결이 안될까요?history-server는 잘 됩니다.저는 프로젝트 명칭만 변경한 상태입니다.로그를 보시고 무엇이 잘못되엇는지 한번 확인해주시고.지도 부탁드립니다.

안녕하세요 강의 항상 잘 보고 있습니다.처음으로 궁금증이 생겨 질문 드립니다.멀티 컨테이너 구성 2번 강의를 듣고 있습니다.여기서docker run -d -p 8088:8088 --network my-network-e "spring.datasource.url=jdbc:mariadb://my-mariadb:3306/mydb" ......이부분에서 -e을 사용할때 이미지에 딱히 옵션을 스프링으로 전달하는 방식이 안나와 있는것 같은데 어떻게 스프링 부트까지 옵션전달이 되는지 궁금합니다. 

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'scopedTarget.eurekaClient' defined in class path resource [org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.class]: Unsatisfied dependency expressed through method 'eurekaClient' parameter 3: No qualifying bean of type 'com.netflix.discovery.shared.transport.jersey.TransportClientFactories<?>' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}   해당 오류가 나는데 혹시 이유가 어떤건지 알 수 있을까요?

아래와 같이 실습 도중, No suitable driver found 에러가 나서 질문드립니다.docker-compose.yml을 통해 zookeeper, kafka broker, kafka connect, mariadb 컨테이너를 실행시켰습니다.version: '2' services: zookeeper: image: confluentinc/cp-zookeeper:7.2.1 hostname: zookeeper container_name: zookeeper ports: - "2181:2181" environment: ZOOKEEPER_CLIENT_PORT: 2181 ZOOKEEPER_TICK_TIME: 2000 broker: image: confluentinc/cp-server:7.2.1 hostname: broker container_name: broker depends_on: - zookeeper ports: - "9092:9092" - "9101:9101" environment: KAFKA_BROKER_ID: 1 KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181' KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:29092,PLAINTEXT_HOST://localhost:9092 KAFKA_METRIC_REPORTERS: io.confluent.metrics.reporter.ConfluentMetricsReporter KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1 KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0 KAFKA_CONFLUENT_LICENSE_TOPIC_REPLICATION_FACTOR: 1 KAFKA_CONFLUENT_BALANCER_TOPIC_REPLICATION_FACTOR: 1 KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1 KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1 KAFKA_JMX_PORT: 9101 KAFKA_JMX_HOSTNAME: localhost KAFKA_CONFLUENT_SCHEMA_REGISTRY_URL: http://schema-registry:8081 CONFLUENT_METRICS_REPORTER_BOOTSTRAP_SERVERS: broker:29092 CONFLUENT_METRICS_REPORTER_TOPIC_REPLICAS: 1 CONFLUENT_METRICS_ENABLE: 'true' CONFLUENT_SUPPORT_CUSTOMER_ID: 'anonymous' connect: image: cnfldemos/cp-server-connect-datagen:0.5.3-7.1.0 hostname: connect container_name: connect depends_on: - broker - mariadb ports: - "8083:8083" volumes: - ./kafka-connect-jdbc:/etc/kafka-connect/jars # JDBC 드라이버가 설치된 경로를 마운트 environment: CONNECT_BOOTSTRAP_SERVERS: 'broker:29092' CONNECT_REST_ADVERTISED_HOST_NAME: connect CONNECT_GROUP_ID: compose-connect-group CONNECT_CONFIG_STORAGE_TOPIC: docker-connect-configs CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR: 1 CONNECT_OFFSET_FLUSH_INTERVAL_MS: 10000 CONNECT_OFFSET_STORAGE_TOPIC: docker-connect-offsets CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR: 1 CONNECT_STATUS_STORAGE_TOPIC: docker-connect-status CONNECT_STATUS_STORAGE_REPLICATION_FACTOR: 1 CONNECT_KEY_CONVERTER: org.apache.kafka.connect.storage.StringConverter CONNECT_VALUE_CONVERTER: org.apache.kafka.connect.json.JsonConverter CONNECT_VALUE_CONVERTER_SCHEMA_REGISTRY_URL: http://schema-registry:8081 CLASSPATH: /usr/share/java/monitoring-interceptors/monitoring-interceptors-7.2.1.jar CONNECT_PRODUCER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringProducerInterceptor" CONNECT_CONSUMER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor" CONNECT_PLUGIN_PATH: "/usr/share/java,/usr/share/confluent-hub-components,/etc/kafka-connect/jars" CONNECT_LOG4J_LOGGERS: org.apache.zookeeper=ERROR,org.I0Itec.zkclient=ERROR,org.reflections=ERROR mariadb: image: mariadb:10.5 container_name: mariadb hostname: mariadb environment: MYSQL_ROOT_PASSWORD: rootpassword MYSQL_DATABASE: testdb MYSQL_USER: testuser MYSQL_PASSWORD: testpassword ports: - "3306:3306" volumes: - ./mariadb_data:/var/lib/mysql확인 결과, kafka connect 컨테이너 내부의 /etc/kafka-connect/jars 경로 아래에 kafka-connect-jdbc-10.6.3.jar,  mariadb-java-client-2.7.2.jar 가 잘 위치해있습니다.mariadb 컨테이너 내부로 접속하여 users 데이터베이스를 잘 생성하였고, 테스트 데이터도 잘 삽입해주었고 결과까지 확인했습니다.postman으로 아래와 같이 source 생성 요청 결과 201 응답이 정상적으로 잘 도착하였습니다.[POST] 127.0.0.1:8083/connectors { "name": "my-source-connector3", "config": { "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector", "connection.url": "jdbc:mysql://mariadb:3306/testdb", "connection.user": "testuser", "connection.password": "testpassword", "mode": "incrementing", "incrementing.column.name": "id", "table.whitelist": "users", "topic.prefix": "my_topic_", "tasks.max": "1" } }5. 그러나 127.0.0.1:8083/connectors/my-source-connector/status 으로 요청을 보내면 아래와 같은 오류가 발생합니다.{ "name": "my-source-connector", "connector": { "state": "FAILED", "worker_id": "connect:8083", "trace": "org.apache.kafka.connect.errors.ConnectException: java.sql.SQLException: No suitable driver found for jdbc:mysql://mariadb:3306/testdb\n\tat io.confluent.connect.jdbc.util.CachedConnectionProvider.getConnection(CachedConnectionProvider.java:59)\n\tat io.confluent.connect.jdbc.JdbcSourceConnector.start(JdbcSourceConnector.java:94)\n\tat org.apache.kafka.connect.runtime.WorkerConnector.doStart(WorkerConnector.java:185)\n\tat org.apache.kafka.connect.runtime.WorkerConnector.start(WorkerConnector.java:210)\n\tat org.apache.kafka.connect.runtime.WorkerConnector.doTransitionTo(WorkerConnector.java:349)\n\tat org.apache.kafka.connect.runtime.WorkerConnector.doTransitionTo(WorkerConnector.java:332)\n\tat org.apache.kafka.connect.runtime.WorkerConnector.doRun(WorkerConnector.java:141)\n\tat org.apache.kafka.connect.runtime.WorkerConnector.run(WorkerConnector.java:118)\n\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)\n\tat java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)\n\tat java.base/java.lang.Thread.run(Thread.java:829)\nCaused by: java.sql.SQLException: No suitable driver found for jdbc:mysql://mariadb:3306/testdb\n\tat java.sql/java.sql.DriverManager.getConnection(DriverManager.java:702)\n\tat java.sql/java.sql.DriverManager.getConnection(DriverManager.java:189)\n\tat io.confluent.connect.jdbc.dialect.GenericDatabaseDialect.getConnection(GenericDatabaseDialect.java:250)\n\tat io.confluent.connect.jdbc.util.CachedConnectionProvider.newConnection(CachedConnectionProvider.java:80)\n\tat io.confluent.connect.jdbc.util.CachedConnectionProvider.getConnection(CachedConnectionProvider.java:52)\n\t... 12 more\n" }, "tasks": [], "type": "source" }