kchandan

RKE2 commands

Install

curl -sL https://get.rke2.io | sh
systemctl daemon-reload
systemctl start rke2-server

kchandan

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

kchandan

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  
  config.vm.box = "geerlingguy/centos7"

  
  config.vm.network "forwarded_port", guest: 8080, host: 8080
  config.vm.network "public_network"

kchandan

from flask import Flask
from flask import request
import json
app = Flask(__name__)


@app.route('/')
def hello():
    return "Check Code of countries"

kchandan

hadoop jar /usr/lib/hadoop-0.20-mapreduce/contrib/streaming/hadoop-streaming-2.6.0-mr1-cdh5.12.0.jar \
-file /home/cloudera/mapper.py    -mapper /home/cloudera/mapper.py \
-file /home/cloudera/reducer.py   -reducer /home/cloudera/reducer.py \
-input /user/cloudera/*.py -output /user/cloudera/output

kchandan

global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
# Alertmanager configuration
alerting:
  alertmanagers:
  - static_configs:
    - targets:
       - localhost:9093

kchandan

git clone https://github.com/becloudready/prometheus_monitoring.git
cd prometheus_monitoring
vagrant up

kchandan

mkdir min_iso

cp -r cmin_iso/* min_iso/
cp cmin_iso/.discinfo min_iso/

kchandan

mount -o loop CentOS-DVD1.iso dvd1/

kchandan

mkdir cmin_iso
mount -o loop CentOS.iso cmin_iso/