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ZABBIX Disk read/write request responses 임계치 변경 zabbix 알람 zabbix 서버에서 알람 메시지 확인 [보고서] > [액션 로그] 제목: Problem: sda: Disk read/write request responses are too high (read > 20 ms for 15m or write > 20 ms for 15m) 메시지: Problem started at 13:24:28 on 2021.04.02 Problem name: sda: Disk read/write request responses are too high (read > 20 ms for 15m or write > 20 ms for 15m) Host: db-xxxxxxx IP: 192.168..

OpenSSL 최신 버전으로 업그레이드 CentOS 7 OpenSSL 지원 프로토콜 확인 $ cat /etc/redhat-release CentOS Linux release 7.9.2009 (Core) $ openssl version OpenSSL 1.0.2k-fips 26 Jan 2017 $ openssl ciphers -v | awk '{print $2}' | sort | uniq SSLv3 TLSv1.2 OpenSSL 삭제 $ yum remove openssl 기본 라이브러리 설치 $ yum install gcc gcc-c++ pcre-devel zlib-devel perl wget OpenSSL Downloads https://www.openssl.org/source/ 소스 컴파일 설치 $ wge..

디스크 IO 성능 테스트(iops) FIO 설치 [Ubuntu 18.04.4 LTS] $ apt install fio [Amazon Linux 2] $ yum install fio 블록 사이트 확인 [ex4] $ tune2fs -l /dev/nvme0n1p1 | grep -i 'block size' Block size: 4096 [xfs] $ xfs_info /dev/nvme0n1p1 meta-data=/dev/nvme0n1p1 isize=512 agcount=11, agsize=524159 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=1 spinodes=0 data = bsize=4096 blocks=5242363, imaxpct=25 = sunit..

운영체제 버전 정보 확인 cat /etc/os-release 확인 ###Ubuntu $ cat /etc/os-release NAME="Ubuntu" VERSION="18.04.4 LTS (Bionic Beaver)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 18.04.4 LTS" VERSION_ID="18.04" HOME_URL="https://www.ubuntu.com/" SUPPORT_URL="https://help.ubuntu.com/" BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/" PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privac..