Elastic Compute Cloud (EC2) Basics

AWS de andar EC2 service exactly ki provide krdi Aah?

EC2 tuhanu virtual machines provide krda Aah jinna nu instances Keha janda Aah. Jadd tuhanu koi vi aisi compute deploy Krn di lod Hunda Aah jithe operating system, runtime environment ya database dependencies manage krne Hunde Aah, taan EC2 hi oh service Aah jithe eh sab kita janda Aah.

Ek EC2 instance di exact resilience level ki hundi Aah, te Pr Kyo?

EC2 instance strictly AZ-Resilient Hunda Aah. Jadd tuhade instance launch krde ho, taan eh ek specific subnet ch launch Hunda Aah, te subnet ek specific availability zone (AZ) ch Hunda Aah. Suppose jis AZ ch instance launch kita gya Aah oh fail ho Jhaan, taan tuhada instance vi fail Hunda Aah.

Linux te Windows instances naal connect Krn layi kinne ports te protocols use kite jande Aah?

Linux instances layi SSH use Hunda Aah jo Port 22 te chalda Aah, te Windows instances nu connect Krn layi RDP (Remote Desktop Protocol) use kita janda Aah jo Port 3389 te chalda Aah.

Scenario: Tuhade EC2 instance nu 'Stopped' state ch rakh dita Aah, par fir vi tuhanu AWS da bill aa reha Aah. Pr Kyo?

Stopped state ch CPU te memory consume Ni hundi, is karke ohna da koi charge Ni Hunda. Par ithe hi sab toh Vaddi Problem aandi Aah jo students nu confuse krdi Aah: Stopped state ch vi storage (EBS) charges painde Hunde Aah. Pr Kyo? Kyuki OS te applications wala disk hamesha tuhade layi allocate Rakho janda Aah.

Scenario: Tuhade ek Custom VPC ch EC2 instance launch kita Aah, par internet toh public access Ni chal reha Aah. Ethe ki missing Aah?

EC2 ek private AWS service Aah te by default eh private AWS zone de andar chalda Aah. Default VPC ch public access already configured Hunda Aah, par custom VPC ch tuhanu eh configuration khud handle Krni pendi Aah, jive explicitly Public IP assign krna te VPC da support allow Krna.

Scenario: Tuhade AWS cost nu 100% khatam krna chaahunde ho. Ki instance nu 'Stop' krna enough Hovaga?

Ni, EC2 cost nu 100% khatam Krn da iklauta tarika Aah instance nu Terminate krna. Eh non-reversible action Aah. Terminate krde hi resources band ho jande Aah te EBS disks vi delete ho jande Aah jis naal charges completely ruk jande Aah.

EC2 (Elastic Compute Cloud) ki Hunda Aah?

Eh AWS ch kisi vi compute requirement layi default starting point Aah, jo tuhanu virtual machines da access dinda Aah.

EBS (Elastic Block Store) ki Hunda Aah?

Eh basically network storage Aah jo EC2 instance nu provide kiti jandi Aah taaki OS te data persist kita ja sake.

Block Device Mapping ki Hunda Aah?

Eh ek configuration Aah jo volumes nu OS de device ID naal link krdi Aah. Eh decide krda Aah ki keda volume boot volume Hovaga te keda data volume.

IaaS model de andar, EC2 instance layi AWS te User di responsibility kive divide hundi Aah?

Kyuki eh IaaS Aah, hardware, virtualization te physical facilities AWS handle krda Aah, par Operating System te us toh upar di har cheez tuhade manage Krni Aah.

SSH Key Pair de kinne parts Hunde Aah te oh kithe Rakho jande Aah?

Jadd tuhade key pair banaande ho, taan isdeh do parts create Hunde Aah. Private part tuhade sirf ek baar download Kr Sakdeh Haan, isnu safe Rakho. Public part AWS kol Hunda Aah jo instance te place kita janda Aah.

AMI Permissions de through tuhade kinne accounts nu access de Sakdeh Haan?

Permissions control krde Aah ki Kinne accounts isnu use Kr Sakdeh Haan. Eh Public ho Sakdeh Haan, Private/Owner (sirf tuhade layi), ya Explicit ho Sakdeh Haan Jadd owner specifically Duji accounts nu access dinda Aah.

Reverse Engineering: Tuhade naye Windows EC2 instance ch RDP Krn di koshish kr rahe ho, par tuhanu Administrator password Ni pata. Tuhade eh kive get karoge?

Windows ch process thoda different Hunda Aah. Tuhanu apni private key provide Krni pendi Aah taaki tuhade AWS console toh local administrator password decrypt krke get Kr sako, te fir RDP use Krke connect krde ho.

Flaw: "Main galti naal apni .pem private key delete Kr diti Aah, so main AWS console ch Chaldeh Aah te isnu dobara download Kr lewanga." Ethe ki Vaddi Problem Aah?

Ethe Vaddi Problem eh Aah ki private part tuhade sirf ek baar download Kr Sakdeh Haan. AWS isnu apne kol store Ni krda. Agar eh gumm ho Jhaan, taan tuhade us instance ch login Ni Kr Sakdeh Haan kyuki matching key missing Hunda Aah.

IaaS (Infrastructure as a Service) ki Hunda Aah?

Ek architectural model jithe tuhada unit of consumption 'instance' Hunda Aah, te tuhanu virtual physical servers da access milda Aah jisde upar tussi OS control krde ho.

AMI (Amazon Machine Image) ki Hunda Aah?

Eh basically EC2 instance da ek image Hunda Aah. Eh server image Werge Hunde Aah jo Windows ya Linux install Krn layi use kite jande Aah.