알라르방의 끄적끄적

1. yum 으로 설치 가능한 jdk 확인 yum list java*jdk-devel 2. java-11-openjdk-devel.x86_64 설치 yum install java-11-openjdk-devel.x86_64 3. 정상 설치 확인 java -version 4. JAVA_HOME 설정 javac 의 심볼릭 링크를 찾아서 JAVA_HOME으로 설정하면 된다 readlink -f /usr/bin/javac #(맨 마지막의 /bin/javac 경로는 제외) vi /etc/profile export JAVA_HOME=/lib/jvm/java-11-openjdk-11.0.10.0.9-1.el7_9.x86_64 source /etc/profile echo $JAVA_HOME 5. 기존 자바 버전 변경(u..

1. Rolling 여러대의 서버가 있을 때 차례대로 배포하는 방법이다. 첫번째 서버가 배포 중이라 역할을 못할 때면 나머지 2개 서버가 대신 부하를 감당하며 서비스를 지속한다. 마찬가지로 나머지 서버들도 배포 중인 서버를 제외한 나머지 서버들이 부하를 감당해준다. * Rolling에서 주의할 점은 하나의 서버가 중단 되었을 때 나머지 서버의 부하량을 잘 파악해야한다. 예를 들어, 100까지 감당 가능한 서버 3대가 있을 때 70,70,70씩 부하를 가지고 있다면, 한개 서버만 다운타임이 생겨도 0,105,105가 되버려서 모든 서비스가 마비가 되버린다. 2. Blue Green 구 버전의 서버와 함께 신 버전의 서버를 준비한다. 신 버전의 서버 준비하는 동안은 구 버전 서버로 트래픽을 흘린다. 그리고 ..

1. Install and configure the necessary dependencies sudo yum install -y curl policycoreutils-python openssh-server openssh-clients perl # Enable OpenSSH server daemon if not enabled: sudo systemctl status sshd sudo systemctl enable sshd sudo systemctl start sshd # Check if opening the firewall is needed with: sudo systemctl status firewalld sudo firewall-cmd --permanent --add-service=http sudo f..

1. 설치 방법 sudo yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpm sudo yum install -y postgresql14-server sudo /usr/pgsql-14/bin/postgresql-14-setup initdb sudo systemctl enable postgresql-14 sudo systemctl start postgresql-14 2. 기동 방법 postgresql-setup --initdb systemctl enable postgresql.service systemctl start postgresql.service

You have 1,000 virtual machines hosted on the Hyper-V hosts in a data center. You plan to migrate all the virtual machines to an Azure pay-as-you-go subscription. You need to identify which expenditure model to use for the planned Azure solution. Which expenditure model should you identify? A. operational B. elastic C. capital D. scalable 정답 : A One of the major changes that you will face when y..

To complete the sentence, select the appropriate option in the answer area. 정답 : Reference: https://azure.microsoft.com/en-gb/overview/what-is-hybrid-cloud-computing/

In which type of cloud model are all the hardware resources owned by a third-party and shared between multiple tenants? A. private B. hybrid C. public 정답 : C Microsoft Azure, Amazon Web Services and Google Cloud are three examples of public cloud services. Microsoft, Amazon and Google own the hardware. The tenants are the customers who use the public cloud services.

To complete the sentence, select the appropriate option in the answer area. 정답 : Azure Site Recovery helps ensure business continuity by keeping business apps and workloads running during outages. Site Recovery replicates workloads running on physical and virtual machines (VMs) from a primary site to a secondary location. Reference: https://docs.microsoft.com/en-us/azure/site-recovery/site-recov..

You plan to migrate several servers from an on-premises network to Azure. What is an advantage of using a public cloud service for the servers over an on-premises network? A. The public cloud is owned by the public, NOT a private corporation B. The public cloud is a crowd-sourcing solution that provides corporations with the ability to enhance the cloud C. All public cloud resources can be freel..

For each of the following statements, select Yes if the statement is true. Otherwise, select No. NOTE: Each correct selection is worth one point. 정답 : 설명 : Box 1: No - It is not true that a company must always migrate from a private cloud model to implement a hybrid cloud. You could start with a public cloud and then combine that with an on-premise infrastructure to implement a hybrid cloud. Box..