Deep dive into Kernel

ansible-playbook --limit 'all:!bad_host' playbook.yml

TICK scrypt예제stream // Select just the cpu measurement from our example database. |from() .measurement('cpu') |alert() .crit(lambda: "usage_idle" < 70) // Whenever we get an alert write it to a file. .log('/tmp/alerts.log') TICK 등록

influxdb 주요 commands 접속 (ssl 사용시)influx -ssl -unsafeSsl 명령어 설명 show databases influxdb의 database 리스트를 보여 줌

For Network Security, AWS EC2 uses VLAN. * VLAN ID is tagged or untagged by NIC offloading.* TOR Switch sends packets with VLAN tags, we cannot see other traffic except my VLAN. VLAN Offload featuresroot@choonho-dev:~/vpp/src/plugins/dpdk/device# ethtool -k ens3Features for ens3:...rx-vlan-offload: on [fixed]tx-vlan-offload: on [fixed]...rx-vlan-filter: on [fixed] Detailed information using DPDK..

Jenkins 2.7.1 이후로 변경됨 Step 1. docker image pull docker pull jenkins Step 2. run jenkins container docker run -d -u jenkins -p 8080:8080 -p 50000:50000 --name jenkins jenkins docker 가 실행되면서 아래와 같은 메시지가 나옴 Jenkins initial setup is required. An admin user has been created and a password generated.Please use the following password to proceed to installation: a60c7d7851ad4b73b25fe6f7cee76863 This may..

SSH Agent forwarding 은 Local PC 의 ssh key(private)를 통해서 Jumphost 뒤에 있는 리눅스 서버들에 접속하게 하는 방법이다. +-------------+ +-------------------+| My PC(key) | --------------->| jumphost |+-------------+ +------------------+ | ----------------------+-------------------------- Server #1 Server #2 Server #N - SSH Key는 MyPC에만 존재하고, jumphost 에는 존재하지 않는다.- MyPC의 key를 통해서 Server #1 ~ #N 까지 접속한다. ㅇ MyPC 에서 할 일 eval ..

Role/roles/common.sethostname/tasks/main.yml - name: Set hostname hostname: name={{ inventory_hostname }} Playbook- name: Update hostname hosts: all become: yes roles: - common.hostname Executeansible-playbook -i

http://blog.daum.net/bagjunggyu/191

import boto3 import logging import traceback logging.basicConfig(level=logging.DEBUG) logger = logging.getLogger("test") aki=" ... my access key id .... " sak="... my secure access key ...." client = boto3.client('ec2',region_name='us-west-2',aws_access_key_id=aki, aws_secret_access_key=sak) def create_keypair(client, KeyName): try: res = client.create_key_pair(KeyName=KeyName) print res['KeyNam..

nohup > /dev/null 2>&1 &