AkashRajvanshi

What is Hypervisor?

A hypervisor is a software that makes virtualization possible. It is also called Virtual Machine Monitor. It divides the host system and allocates the resources to each divided virtual environment. You can basically have multiple OS on a single host system. There are two types of Hypervisors:

• Type 1: It’s also called Native Hypervisor or Bare metal Hypervisor. It runs directly on the underlying host system. It has direct access to your host’s system hardware and hence does not require a base server operating system.
• Type 2: This kind of hypervisor makes use of the underlying host operating system. It’s also called Hosted Hypervisor.

What is virtualization?

Virtualization is the process of creating a software-based, virtual version of something(compute storage, servers, application, etc.). These virtual versions or environments are created from a single physical hardware system. Virtualization lets you split one system into many different sections which act like separ

AkashRajvanshi

Questions are not from any actual exam!!!  



Q:  Create a job that calculates pi to 2000 decimal points using the container with the image named perl
and the following commands issued to the container:  ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]
Once the job has completed, check the logs to and export the result to pi-result.txt.

Solution:

AkashRajvanshi

Cloud images in Proxmox

• Preparing Cloud-Init Templates
• Cloud-Init Support - Proxmox VE
• Proxmox VE Administration Guide

A script which automates these steps for multiple distros incl. CoreOS, CentOS, Arch and ALpine

• create-cloud-template.sh

Steps for creating an Ubuntu 18.04 cloud template

• Using a ready-to-use Ubuntu image

AkashRajvanshi

{"keys":[{"kty":"RSA","e":"AQAB","n":"ALspOgJc9TixISGrf8m3FbRRMJ0EZNcgJSVb-ELyRMHbtLyG92bHPclIt6JrvORSIuEz1G7rBogtVeBMe65MIem9T-_1Yf2u3fUYEm-kSRnMqMMEJSZ9zVZRdPLDbhfhr4F7EnYGup49EU7jfmXGM9B2zkGzqh7MJKgENXlGIJ-XK71aWJEa7ciFJomUuineOVGGjtLtZPLXAKmC3Wtmj9xbaMEkdEUaCJqnnnq5HISdKK_c6GThCsQR_RF63_ICQ5vG58_UO8l5IEFv2QfmU_7l_3sMruKosdjLh90kHaSqToYdUEt0q_SvRdM0bx5n_TmzXkNys0gihfh4qn-QQvk="}]}

AkashRajvanshi

{"keys":[{"kty":"RSA","e":"AQAB","n":"AMMTOEJrpclG10hcGx7qvnMxcLisIN_eeX1nyZhaNBCi8MHjpHGMZ2EvhCbzY0I6zENT0KHZ9H6f6niVQslj0F7Ds2f0rrd-EdgQwluvxY6zY2o0_UZ0r3_oL9gf4jbrs98eLj9lXM8XJpBnbhC6uFLsAMtSGDiU6fA1Bl0JTtUmKBERVrxeoeho_2PKkBNzRslct9fvprOtGLnTHkwxaE3RFr4b3RtPfJh9qdDHYfwuXQjZtk6mcnAouqx7Kx9oRA6IXI0ZK64mNlbgObZ-y7eFiHjobJpiQ3Fun_im66Q4sgKQda4tqb1e6zOFEE67BmBwaGk6MHWN3SV_Fd5NEh0="}]}

AkashRajvanshi

ssh-keygen -t rsa -b 4096 -N '' -C "rthijssen@gmail.com" -f ~/.ssh/id_rsa
ssh-keygen -t rsa -b 4096 -N '' -C "rthijssen@gmail.com" -f ~/.ssh/github_rsa
ssh-keygen -t rsa -b 4096 -N '' -C "rthijssen@gmail.com" -f ~/.ssh/mozilla_rsa

AkashRajvanshi

Keybase proof

I hereby claim:

• I am akashrajvanshi on github.
• I am hacstac (https://keybase.io/hacstac) on keybase.
• I have a public key ASD7dJJ47sRzrg_JqmN3EK_JhC1USIKIT3BkK6AnmSKNLgo

To claim this, I am signing this object:

AkashRajvanshi

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

AkashRajvanshi

# Check for turnkey templates, if not shows : Go to Proxmox Server Console ->  `$ pveam update`

# Select turnkey-core ( It is optimized debian Container Image by turnkey project  )
# Note - Uncheck the priviledged container option
# Add resources and bootup container

# Install docker as per debian ( It uses very minimal reosurce, You can setup two three docker container in less then a 1 GB Ram)

# Extra Tip: Select the ID Criteria for Containers & VM's:
- VMS: 100-199

AkashRajvanshi

# Setup Influx DB on any server ( as per os )

# Edit /etc/influxdb/influxdb.conf
[[udp]]
   enabled = true
   bind-address = "0.0.0.0:8089"
   database = "proxmox"
   batch-size = 1000
   batch-timeout = "1s"