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인프런 강좌를 듣던 중 docker-compose 실행 시 아래와 같은 오류 발생했다. Error while fetching server API version: HTTPConnection.request() got an unexpected keyword argument 'chunked' 요약하면 docker와 docker-compose 버전 차이 때문에 발생한 문제다. 1. 도커 제거 sudo apt-get remove docker-compose -y 2. jq 라이브러리 설치 sudo apt install jq 3. docker-compose 최신 버전 설치 VERSION=$(curl --silent https://api.github.com/repos/docker/compose/releases/lates..

지속적으로 ESXi 로그인할 수 없습니다. 문제 발생 1. DCUI에서 F2 눌러 Customize System settings 진입 2. Troubleshooting Options 3. Restart Management Agents 4. F11 교육기간 중 각기 다른 서버에서 2번 발생했으나 위와 같은 과정으로 해결했음. 잘 안 되면 아래 사이트 참조5 Methods to Restart VMware Management Services (nakivo.com)

Physical Environment L2 switch with 4 ports and a NIC(MAC 2) connected How to capture traffic( Source MAC 1, Dest MAC 3 ) at MAC 2 Solutions : Port Mirroring, Promiscuous Mode Promiscuous Mode : allow and disallow all traffic to be forwarded, regardless of the destination Virtual enviroment 1. Packet Capture Tools 2. IDS / IPS (VM) 3. Hypervisor on VM Nested Virtualization Enviroment external vS..

Physical Hardware > Physical NIC Virtual Hardware Virtual NIC Virtualization VMXNET VMXNET2 VMXNET3 Emulation e1000 e1000e Virtual Switch L2 Switch(MAC needed) Not Based on Hardware CPU Dependence Doesn't Learn MAC addr why? creation by hypervisor How to make MAC? OUI + Number vSwtiches do not require STP because they are not connected VLAN and Trunk Support if using VLAN with esxi supports 802...

vSphere+ = SaaS but needed vCenter Installing(on-premises) vSphere+ provided service 1. Admin Sevices 2. Developer Services : Tanzu 3. Add-On Services : Disaster recovery benefits : integrated enviroment

Hardware - BIOS(Firmware) - OS OS - Driver - Peripheral Hardware CPU contains Instruction Set If diff instructionset? e.g x86 os - network equipment(armcpu or motorola cpu) Solution : emulation

Datacenter Infrastructure 1. Server - Server Virtualization 2. Network - SDN(Software-Defined Networking) 3. Storage - SDS/HCI (Software-Defined Storage / Hyperconverged Infrastructure) Why? Software Defined Software Defined = Object(Property + Method) Result Programming > Automation > Service > Cloud

Remove Duplicates from Sorted List - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com Given the head of a sorted linked list, delete all duplicates such that each element appears only once. Return the linked list sorted as well. Example 1: Input: head = [1,1,2] Output: [1,2] Example..

Climbing Stairs - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com You are climbing a staircase. It takes n steps to reach the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top? Example 1: Input: n = 2 Output: 2 Explanation: There a..

Sqrt(x) - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com Given a non-negative integer x, compute and return the square root of x. Since the return type is an integer, the decimal digits are truncated, and only the integer part of the result is returned. Note: You are not allowed t..