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๐Ÿณ ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค ๊ธฐ์ดˆ ๊ฐœ๋… Quiz

๋ฌธ์ œ 1. ์›Œ์ปค ๋…ธ๋“œ์—์„œ Pod๋ฅผ ์‹คํ–‰ํ•˜๋Š” ์ปดํฌ๋„ŒํŠธ

ํ•œ ํšŒ์‚ฌ๊ฐ€ ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค ํด๋Ÿฌ์Šคํ„ฐ๋ฅผ ์ฒ˜์Œ ๊ตฌ์ถ•ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์šด์˜ํŒ€์ด kubectl๋กœ Pod ๋ฐฐํฌ ๋ช…๋ น์„ ์‹คํ–‰ํ–ˆ์ง€๋งŒ, ์–ด๋–ค ์›Œ์ปค ๋…ธ๋“œ์—๋„ Pod๊ฐ€ ์Šค์ผ€์ค„๋ง๋˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค. ์กฐ์‚ฌ ๊ฒฐ๊ณผ ์›Œ์ปค ๋…ธ๋“œ์˜ ํŠน์ • ์ปดํฌ๋„ŒํŠธ๊ฐ€ ๋™์ž‘ํ•˜์ง€ ์•Š๊ณ  ์žˆ์—ˆ์Šต๋‹ˆ๋‹ค.

Pod๋ฅผ ์›Œ์ปค ๋…ธ๋“œ์— ์‹ค์ œ๋กœ ์‹คํ–‰์‹œํ‚ค๋Š” ์—ญํ• ์„ ๋‹ด๋‹นํ•˜๋Š” ์ปดํฌ๋„ŒํŠธ๋Š” ๋ฌด์—‡์ž…๋‹ˆ๊นŒ?

  1. kube-apiserver
  2. etcd
  3. kube-scheduler
  4. kubelet
์ •๋‹ต ๋ฐ ํ•ด์„ค ๋ณด๊ธฐ

์ •๋‹ต: 4๋ฒˆ

ํ’€์ด:

kubelet์€ ๊ฐ ์›Œ์ปค ๋…ธ๋“œ์—์„œ ์‹คํ–‰๋˜๋ฉฐ, ๋งˆ์Šคํ„ฐ ๋…ธ๋“œ๋กœ๋ถ€ํ„ฐ Pod ๋ฐฐํฌ ์ง€์‹œ๋ฅผ ๋ฐ›์•„ ์‹ค์ œ๋กœ ์ปจํ…Œ์ด๋„ˆ๋ฅผ ์ƒ์„ฑํ•˜๊ณ  ๊ด€๋ฆฌํ•˜๋Š” ์—ญํ• ์„ ํ•ฉ๋‹ˆ๋‹ค.

  • kube-apiserver โ†’ ๋งˆ์Šคํ„ฐ ๋…ธ๋“œ์˜ API ์ง„์ž…์ 
  • etcd โ†’ ํด๋Ÿฌ์Šคํ„ฐ ์ƒํƒœ๋ฅผ ์ €์žฅํ•˜๋Š” ๋ถ„์‚ฐ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค
  • kube-scheduler โ†’ Pod๋ฅผ ์–ด๋–ค ๋…ธ๋“œ์— ๋ฐฐ์น˜ํ• ์ง€ ๊ฒฐ์ •ํ•  ๋ฟ, ์ง์ ‘ ์‹คํ–‰ํ•˜์ง€ ์•Š์Œ

๋ฌธ์ œ 2. ๋งค๋‹ˆํŽ˜์ŠคํŠธ์˜ ํ•ต์‹ฌ ๊ตฌ์„ฑ ์š”์†Œ

๊ฐœ๋ฐœํŒ€์ด Nginx ์›น ์„œ๋ฒ„๋ฅผ ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค์— ๋ฐฐํฌํ•˜๋ ค๊ณ  ํ•ฉ๋‹ˆ๋‹ค. YAML ๋งค๋‹ˆํŽ˜์ŠคํŠธ ํŒŒ์ผ์„ ์ž‘์„ฑํ•˜์—ฌ Pod๋ฅผ ์ •์˜ํ•˜๋ ค๋Š”๋ฐ, ๋งค๋‹ˆํŽ˜์ŠคํŠธ์— ๋ฐ˜๋“œ์‹œ ํฌํ•จํ•ด์•ผ ํ•˜๋Š” ํ•ต์‹ฌ ์ •๋ณด๊ฐ€ ์•„๋‹Œ ๊ฒƒ์€ ๋ฌด์—‡์ž…๋‹ˆ๊นŒ?

  1. ์‚ฌ์šฉํ•  ์ปจํ…Œ์ด๋„ˆ ์ด๋ฏธ์ง€ ์ด๋ฆ„ (์˜ˆ: nginx:latest)
  2. Pod์˜ metadata (์ด๋ฆ„, ๋ ˆ์ด๋ธ” ๋“ฑ)
  3. apiVersion๊ณผ kind
  4. Pod๊ฐ€ ๋ฐฐํฌ๋  ์›Œ์ปค ๋…ธ๋“œ์˜ IP ์ฃผ์†Œ
์ •๋‹ต ๋ฐ ํ•ด์„ค ๋ณด๊ธฐ

์ •๋‹ต: 4๋ฒˆ

ํ’€์ด:

์ฟ ๋ฒ„๋„คํ‹ฐ์Šค ๋งค๋‹ˆํŽ˜์ŠคํŠธ์˜ ํ•ต์‹ฌ ๊ตฌ์„ฑ ์š”์†Œ๋Š” ๋‹ค์Œ ๋„ค ๊ฐ€์ง€์ž…๋‹ˆ๋‹ค:

apiVersion:  # API ๋ฒ„์ „
kind:        # ๋ฆฌ์†Œ์Šค ์ข…๋ฅ˜ (Pod, Service ๋“ฑ)
metadata:    # ์ด๋ฆ„, ๋ ˆ์ด๋ธ” ๋“ฑ
spec:        # ์ปจํ…Œ์ด๋„ˆ ์ด๋ฏธ์ง€, ํฌํŠธ ๋“ฑ ์ƒ์„ธ ์ŠคํŽ™

Pod๊ฐ€ ์–ด๋–ค ๋…ธ๋“œ์— ๋ฐฐ์น˜๋ ์ง€๋Š” kube-scheduler๊ฐ€ ์ž๋™์œผ๋กœ ๊ฒฐ์ •ํ•˜๋ฏ€๋กœ, ์›Œ์ปค ๋…ธ๋“œ์˜ IP ์ฃผ์†Œ๋ฅผ ๋งค๋‹ˆํŽ˜์ŠคํŠธ์— ์ง์ ‘ ์ง€์ •ํ•  ํ•„์š”๊ฐ€ ์—†์Šต๋‹ˆ๋‹ค.


๋ฌธ์ œ 3. Pod ๊ฐ„ ์•ˆ์ •์ ์ธ ํ†ต์‹ 

ํ•œ ํŒ€์ด ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค ํด๋Ÿฌ์Šคํ„ฐ ๋‚ด๋ถ€์—์„œ ํ”„๋ก ํŠธ์—”๋“œ Pod์™€ ๋ฐฑ์—”๋“œ Pod๋ฅผ ์šด์˜ํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ํ”„๋ก ํŠธ์—”๋“œ Pod๊ฐ€ ๋ฐฑ์—”๋“œ Pod์— ์ ‘๊ทผํ•ด์•ผ ํ•˜๋Š”๋ฐ, ๋ฐฑ์—”๋“œ Pod๊ฐ€ ์žฌ์‹œ์ž‘๋  ๋•Œ๋งˆ๋‹ค IP๊ฐ€ ๋ณ€๊ฒฝ๋˜์–ด ํ†ต์‹ ์ด ๋Š๊ธฐ๋Š” ๋ฌธ์ œ๊ฐ€ ๋ฐœ์ƒํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

์ด ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•ด ์‚ฌ์šฉํ•ด์•ผ ํ•˜๋Š” ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค ๋ฆฌ์†Œ์Šค๋Š” ๋ฌด์—‡์ž…๋‹ˆ๊นŒ?

  1. ConfigMap
  2. Namespace
  3. Service
  4. PersistentVolume
์ •๋‹ต ๋ฐ ํ•ด์„ค ๋ณด๊ธฐ

์ •๋‹ต: 3๋ฒˆ

ํ’€์ด:

Service๋Š” Pod ์•ž์— ๊ณ ์ •๋œ ์ ‘๊ทผ ํฌ์ธํŠธ(IP์™€ DNS ์ด๋ฆ„)๋ฅผ ์ œ๊ณตํ•ฉ๋‹ˆ๋‹ค. ๋ฐฑ์—”๋“œ Pod์˜ IP๊ฐ€ ๋ณ€๊ฒฝ๋˜๋”๋ผ๋„ Service๊ฐ€ ์ž๋™์œผ๋กœ ์ •์ƒ Pod์— ํŠธ๋ž˜ํ”ฝ์„ ์ „๋‹ฌํ•ด ์ฃผ๋ฏ€๋กœ ํ†ต์‹ ์ด ๋Š๊ธฐ์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

  • ConfigMap โ†’ ์„ค์ • ๋ฐ์ดํ„ฐ ์ €์žฅ์šฉ
  • Namespace โ†’ ๋ฆฌ์†Œ์Šค ๊ฒฉ๋ฆฌ์šฉ
  • PersistentVolume โ†’ ๋ฐ์ดํ„ฐ ์˜๊ตฌ ์ €์žฅ์šฉ

๋ฌธ์ œ 4. ์ปจํ…Œ์ด๋„ˆ ๋Ÿฐํƒ€์ž„์˜ ์—ญํ• 

์šด์˜ํŒ€์ด ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค ํด๋Ÿฌ์Šคํ„ฐ์—์„œ ์ปจํ…Œ์ด๋„ˆ๊ฐ€ ์‹คํ–‰๋˜์ง€ ์•Š๋Š” ๋ฌธ์ œ๋ฅผ ๊ฒช๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ์›Œ์ปค ๋…ธ๋“œ์— ์ ‘์†ํ•˜์—ฌ ํ™•์ธํ•ด๋ณด๋‹ˆ ์ปจํ…Œ์ด๋„ˆ ๋Ÿฐํƒ€์ž„(containerd)์ด ์ค‘์ง€๋œ ์ƒํƒœ์˜€์Šต๋‹ˆ๋‹ค.

์ปจํ…Œ์ด๋„ˆ ๋Ÿฐํƒ€์ž„์˜ ์—ญํ• ๋กœ ๊ฐ€์žฅ ์˜ฌ๋ฐ”๋ฅธ ์„ค๋ช…์€ ๋ฌด์—‡์ž…๋‹ˆ๊นŒ?

  1. ํด๋Ÿฌ์Šคํ„ฐ์˜ ๋ชจ๋“  ์ƒํƒœ ์ •๋ณด๋ฅผ ์ €์žฅํ•˜๋Š” ๋ถ„์‚ฐ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค์ด๋‹ค.
  2. ์ปจํ…Œ์ด๋„ˆ ์ด๋ฏธ์ง€๋ฅผ ๊ฐ€์ ธ์˜ค๊ณ  ์‹ค์ œ ์ปจํ…Œ์ด๋„ˆ๋ฅผ ์ƒ์„ฑยท์‹คํ–‰ยท์‚ญ์ œํ•˜๋Š” ์†Œํ”„ํŠธ์›จ์–ด์ด๋‹ค.
  3. ์™ธ๋ถ€ ํŠธ๋ž˜ํ”ฝ์„ ํด๋Ÿฌ์Šคํ„ฐ ๋‚ด๋ถ€์˜ Pod๋กœ ์ „๋‹ฌํ•˜๋Š” ๋กœ๋“œ๋ฐธ๋Ÿฐ์„œ์ด๋‹ค.
  4. Pod๋ฅผ ์–ด๋–ค ๋…ธ๋“œ์— ๋ฐฐ์น˜ํ• ์ง€ ๊ฒฐ์ •ํ•˜๋Š” ์Šค์ผ€์ค„๋ง ์—”์ง„์ด๋‹ค.
์ •๋‹ต ๋ฐ ํ•ด์„ค ๋ณด๊ธฐ

์ •๋‹ต: 2๋ฒˆ

ํ’€์ด:

์ปจํ…Œ์ด๋„ˆ ๋Ÿฐํƒ€์ž„(containerd, CRI-O ๋“ฑ)์€ ์ปจํ…Œ์ด๋„ˆ ์ด๋ฏธ์ง€๋ฅผ ํ’€(pull)ํ•˜๊ณ  ์‹ค์ œ๋กœ ์ปจํ…Œ์ด๋„ˆ๋ฅผ ์ƒ์„ฑยท์‹คํ–‰ยท์‚ญ์ œํ•˜๋Š” ์—ญํ• ์„ ํ•ฉ๋‹ˆ๋‹ค.

  • A โ†’ etcd
  • C โ†’ Service / Ingress
  • D โ†’ kube-scheduler

๋ฌธ์ œ 5. ๋งˆ์Šคํ„ฐ ๋…ธ๋“œ(Control Plane)์˜ ๊ตฌ์„ฑ ์š”์†Œ

์‹ ์ž… ์—”์ง€๋‹ˆ์–ด๊ฐ€ ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค ๋งˆ์Šคํ„ฐ ๋…ธ๋“œ์˜ ๊ตฌ์„ฑ ์š”์†Œ๋ฅผ ํ•™์Šตํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

๋‹ค์Œ ์ค‘ ๋งˆ์Šคํ„ฐ ๋…ธ๋“œ(Control Plane)์˜ ๊ตฌ์„ฑ ์š”์†Œ๋กœ๋งŒ ์˜ฌ๋ฐ”๋ฅด๊ฒŒ ๋ฌถ์ธ ๊ฒƒ์€ ๋ฌด์—‡์ž…๋‹ˆ๊นŒ?

  1. kubelet, kube-proxy, ์ปจํ…Œ์ด๋„ˆ ๋Ÿฐํƒ€์ž„
  2. kube-apiserver, kube-scheduler, kube-controller-manager, etcd
  3. kube-apiserver, kubelet, etcd, kube-proxy
  4. kube-scheduler, kube-proxy, ์ปจํ…Œ์ด๋„ˆ ๋Ÿฐํƒ€์ž„, etcd
์ •๋‹ต ๋ฐ ํ•ด์„ค ๋ณด๊ธฐ

์ •๋‹ต: 2๋ฒˆ

ํ’€์ด:

๋งˆ์Šคํ„ฐ ๋…ธ๋“œ(Control Plane) ์˜ ํ•ต์‹ฌ ๊ตฌ์„ฑ ์š”์†Œ:

์ปดํฌ๋„ŒํŠธ ์—ญํ• 
kube-apiserver ๋ชจ๋“  ์š”์ฒญ์˜ ์ง„์ž…์  (API ์„œ๋ฒ„)
kube-scheduler Pod๋ฅผ ์ ์ ˆํ•œ ๋…ธ๋“œ์— ๋ฐฐ์น˜
kube-controller-manager ํด๋Ÿฌ์Šคํ„ฐ ์ƒํƒœ๋ฅผ ์›ํ•˜๋Š” ์ƒํƒœ๋กœ ์œ ์ง€
etcd ํด๋Ÿฌ์Šคํ„ฐ ์ƒํƒœ ๋ฐ์ดํ„ฐ ์ €์žฅ์†Œ

์›Œ์ปค ๋…ธ๋“œ์˜ ๊ตฌ์„ฑ ์š”์†Œ: kubelet, kube-proxy, ์ปจํ…Œ์ด๋„ˆ ๋Ÿฐํƒ€์ž„



โœ๏ธ ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค ์‘์šฉ ๊ฐœ๋… ํ™•์ธ Quiz

[๋ฌธ์ œ] ํŒŒ๋“œ ๋ฐฐํฌ ์˜ค๋ฅ˜ ๋ถ„์„ ๋ฐ ์ •๋ณด ํ™•์ธ

์ƒํ™ฉ ์„ค๋ช…: ํด๋ผ์šฐ๋“œ ์—”์ง€๋‹ˆ์–ด์ธ ๋‹น์‹ ์€ fisa-dev๋ผ๋Š” ์ด๋ฆ„์˜ ๋„ค์ž„์ŠคํŽ˜์ด์Šค(Namespace)์— ์›น ์„œ๋ฒ„ ํŒŒ๋“œ(Pod)๋ฅผ ๋ฐฐํฌํ•˜๊ธฐ ์œ„ํ•ด YAML ํŒŒ์ผ์„ ์ž‘์„ฑํ•˜๊ณ  kubectl apply -f web-server.yaml ๋ช…๋ น์„ ์‹คํ–‰ํ–ˆ์Šต๋‹ˆ๋‹ค.

ํ•˜์ง€๋งŒ ๋ช‡ ๋ถ„์ด ์ง€๋‚˜๋„ ์„œ๋น„์Šค๊ฐ€ ์ •์ƒ ์ž‘๋™ํ•˜์ง€ ์•Š์•„ ์ƒํƒœ๋ฅผ ํ™•์ธํ•ด ๋ณด๋‹ˆ, ํŒŒ๋“œ์˜ ์ƒํƒœ๊ฐ€ ImagePullBackOff๋กœ ํ‘œ์‹œ๋˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. ๋‹น์‹ ์€ ์ด ๋ฌธ์ œ๊ฐ€ ์ด๋ฏธ์ง€ ์ด๋ฆ„ ์˜คํƒ€ ๋•Œ๋ฌธ์ธ์ง€, ์•„๋‹ˆ๋ฉด ์ปจํ…Œ์ด๋„ˆ ๋Ÿฐํƒ€์ž„์ด ์ด๋ฏธ์ง€๋ฅผ ์ฐพ์ง€ ๋ชปํ•ด์„œ ๋ฐœ์ƒํ•œ ๊ฒƒ์ธ์ง€ ๊ตฌ์ฒด์ ์ธ ์›์ธ์„ ํŒŒ์•…ํ•˜๊ณ ์ž ํ•ฉ๋‹ˆ๋‹ค.

๋˜ํ•œ, ์ด ํŒŒ๋“œ๊ฐ€ ํด๋Ÿฌ์Šคํ„ฐ ๋‚ด์˜ ์–ด๋–ค ๋…ธ๋“œ(Node)์— ์Šค์ผ€์ค„๋ง ๋˜์—ˆ๋Š”์ง€์™€ ํŒŒ๋“œ์˜ IP ์ฃผ์†Œ๋„ ํ•จ๊ป˜ ํ™•์ธํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค. ์ด๋•Œ ๊ฐ€์žฅ ์ ์ ˆํ•œ ์กฐ์น˜๋ฅผ ์ทจํ•  ์ˆ˜ ์žˆ๋Š” ๋ช…๋ น์–ด๋Š” ๋ฌด์—‡์ž…๋‹ˆ๊นŒ?

  1. kubectl logs web-server -n fisa-dev
  2. kubectl get pod web-server -n fisa-dev
  3. kubectl describe pod web-server -n fisa-dev
  4. kubectl exec -it web-server -n fisa-dev -- /bin/bash

๐Ÿ“– ๊ด€๋ จ ๊ฐœ๋… ํ‚ค์›Œ๋“œ

  • Pod Lifecycle: Pending โ†’ ContainerCreating โ†’ Running
    • ์˜ค๋ฅ˜ ์‹œ ImagePullBackOff, CrashLoopBackOff ๋“ฑ์ด ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Œ.
  • Control Plane: Scheduler๊ฐ€ ํŒŒ๋“œ๋ฅผ ์ ์ ˆํ•œ Node์— ๋ฐฐ์น˜ํ•˜๋Š” ๊ณผ์ •์„ ์ดํ•ดํ•ด์•ผ ํ•จ.
  • Troubleshooting: ์ผ๋ฐ˜์ ์œผ๋กœ get โ†’ describe โ†’ logs ์ˆœ์„œ๋กœ ์ง„๋‹จ์„ ์ง„ํ–‰ํ•จ.

์ •๋‹ต ๋ฐ ํ•ด์„ค ๋ณด๊ธฐ

์ •๋‹ต: 3๋ฒˆ

ํ’€์ด:

  1. describe ๋ช…๋ น์–ด๊ฐ€ ์ •๋‹ต์ธ ์ด์œ :

    • Events ์„น์…˜: kubectl describe๋Š” ๋ฆฌ์†Œ์Šค์˜ ์ƒ์„ธ ์ •๋ณด๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ํ•˜๋‹จ์˜ Events ๋กœ๊ทธ๋ฅผ ๋ณด์—ฌ์ค๋‹ˆ๋‹ค. ImagePullBackOff ๋ฐœ์ƒ ์‹œ "Failed to pull image..." ๊ฐ™์€ ๊ตฌ์ฒด์ ์ธ ์—๋Ÿฌ ๋ฉ”์‹œ์ง€๋ฅผ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋Š” ๊ฐ€์žฅ ํ™•์‹คํ•œ ๋ฐฉ๋ฒ•์ž…๋‹ˆ๋‹ค.
    • ์ธํ”„๋ผ ์ •๋ณด: ๋ฌธ์ œ์—์„œ ์š”๊ตฌํ•œ Node(์–ด๋А ์›Œ์ปค ๋…ธ๋“œ์— ๋ฐฐํฌ๋๋Š”์ง€), IP(ํŒŒ๋“œ ์ฃผ์†Œ), Labels, Namespace ์ •๋ณด๋ฅผ ๋ชจ๋‘ ํฌํ•จํ•˜๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
  2. ์˜ค๋‹ต ๋ถ„์„:

    • 1๋ฒˆ (logs): ์ปจํ…Œ์ด๋„ˆ ๋‚ด๋ถ€ ์• ํ”Œ๋ฆฌ์ผ€์ด์…˜์˜ ์ถœ๋ ฅ ๋กœ๊ทธ๋ฅผ ๋ด…๋‹ˆ๋‹ค. ์ง€๊ธˆ์ฒ˜๋Ÿผ ์ด๋ฏธ์ง€๋ฅผ ๋ชป ๊ฐ€์ ธ์™€์„œ ์ปจํ…Œ์ด๋„ˆ๊ฐ€ ์ƒ์„ฑ์กฐ์ฐจ ๋˜์ง€ ์•Š์€ ๋‹จ๊ณ„(ImagePullBackOff)์—์„œ๋Š” ๋กœ๊ทธ๋ฅผ ๋ณผ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค.
    • 2๋ฒˆ (get): ํŒŒ๋“œ์˜ ์ƒํƒœ(Status)๋งŒ ์š”์•ฝํ•ด์„œ ๋ณด์—ฌ์ค๋‹ˆ๋‹ค. ๊ตฌ์ฒด์ ์ธ ์—๋Ÿฌ ์›์ธ์ด๋‚˜ ๋…ธ๋“œ ๋ฐฐ์น˜ ์ •๋ณด๊นŒ์ง€๋Š” ๋‚˜์˜ค์ง€ ์•Š์Šต๋‹ˆ๋‹ค. ๋ฌผ๋ก  -o wide ์˜ต์…˜์„ ๋ถ™์ด๋ฉด IP์™€ ๋…ธ๋“œ๋Š” ๋ณด์ด์ง€๋งŒ, ์—๋Ÿฌ ์›์ธ์€ ์•Œ ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค.
    • 4๋ฒˆ (exec): ์‹คํ–‰ ์ค‘์ธ ์ปจํ…Œ์ด๋„ˆ์— ์ ‘์†ํ•˜๋Š” ๋ช…๋ น์ž…๋‹ˆ๋‹ค. ํŒŒ๋“œ๊ฐ€ Running ์ƒํƒœ๊ฐ€ ์•„๋‹ˆ๋ฏ€๋กœ ๋ช…๋ น์ด ์‹คํŒจํ•ฉ๋‹ˆ๋‹ค.

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