Kubernetes: [์งˆ๋ฌธ] Pod๊ฐ€ ๋ฌด์—‡(Rep. Controller, Deployment, Replica Set ๋“ฑ)์— ์†ํ•˜๋Š”์ง€ ์–ด๋–ป๊ฒŒ ์•Œ ์ˆ˜ ์žˆ๋‚˜์š”?

์— ๋งŒ๋“  2016๋…„ 09์›” 05์ผ  ยท  3์ฝ”๋ฉ˜ํŠธ  ยท  ์ถœ์ฒ˜: kubernetes/kubernetes

๋„์›€ ์š”์ฒญ์ž…๋‹ˆ๊นŒ? (์˜ˆ์ธ ๊ฒฝ์šฐ ๋ฌธ์ œ ํ•ด๊ฒฐ ๊ฐ€์ด๋“œ ๋ฐ ์ปค๋ฎค๋‹ˆํ‹ฐ ์ง€์› ์ฑ„๋„์„ ์‚ฌ์šฉํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค. http://kubernetes.io/docs/troubleshooting/ ์ฐธ์กฐ): ์•„๋‹ˆ์š”

์ด ๋ฌธ์ œ๋ฅผ ์ œ์ถœํ•˜๊ธฐ ์ „์— Kubernetes ๋ฌธ์ œ์—์„œ ์–ด๋–ค ํ‚ค์›Œ๋“œ๋ฅผ ๊ฒ€์ƒ‰ํ•˜์…จ์Šต๋‹ˆ๊นŒ? (์ค‘๋ณต๋œ ๊ฒƒ์„ ๋ฐœ๊ฒฌํ–ˆ๋‹ค๋ฉด ๋Œ€์‹  ๊ฑฐ๊ธฐ์— ๋‹ต์žฅ์„ ๋ณด๋‚ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.): ์—ฌ๊ธฐ์—๋Š” ๋งŽ์€ ํ‚ค์›Œ๋“œ๊ฐ€ ํฌํ•จ๋˜์–ด ์žˆ๊ธฐ ๋•Œ๋ฌธ์— ๊ฒ€์ƒ‰ํ•˜๊ธฐ๊ฐ€ ์•ฝ๊ฐ„ ์–ด๋ ต์Šต๋‹ˆ๋‹ค.


์ด๊ฒƒ์€ ๋ฒ„๊ทธ ๋ณด๊ณ ์ž…๋‹ˆ๊นŒ, ์•„๋‹ˆ๋ฉด ๊ธฐ๋Šฅ ์š”์ฒญ์ž…๋‹ˆ๊นŒ? (ํ•˜๋‚˜ ์„ ํƒ): ์งˆ๋ฌธ

์ œ๋ชฉ์ด ๋งํ•˜๋Š” ๊ฒƒ๊ณผ ๊ฑฐ์˜ ๊ฐ™์Šต๋‹ˆ๋‹ค. ๊ฐ€๋” ํฌ๋“œ๋ฅผ ์˜์›ํžˆ ์ฃฝ์ด๊ณ  ์‹ถ์€๋ฐ ๋ญ˜ ๋งŒ๋“ค์—ˆ๋Š”์ง€ ๊ธฐ์–ต์ด ์•ˆ๋‚˜์„œ ์งˆ๋ฌธ๋“œ๋ฆฝ๋‹ˆ๋‹ค.

arekubectl

๊ฐ€์žฅ ์œ ์šฉํ•œ ๋Œ“๊ธ€

@AdoHe ๊ทธ๋Ÿฌ๋‚˜ ๊ทธ๊ฒƒ์€ ๋‚ด๊ฐ€ํ•˜์ง€ ์•Š์€ ์ฒ˜์Œ์— ์„ค์ •๋˜์—ˆ๋‹ค๊ณ  ๊ฐ€์ •ํ•ฉ๋‹ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ๊ท€ํ•˜์˜ ์ œ์•ˆ์€ ๋‹ค์Œ์œผ๋กœ ์ด์–ด์ง‘๋‹ˆ๋‹ค.

์„ค๋ช… ํ˜ธ์ถœ์„ ์‚ฌ์šฉํ•˜๋ฉด Controllers ๋Œ€ํ•ด grepํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

kubectl describe pods dd-agent-4qwo1 | grep Controllers
# Controllers:      DaemonSet/dd-agent

๋‹จ๋… ํฌ๋“œ๊ฐ€ ์‹คํ–‰ ์ค‘์ธ ๊ฒฝ์šฐ Controllers ๋Š” ๋น„์–ด ์žˆ์Šต๋‹ˆ๋‹ค.

kubectl describe pods apache | grep Controllers
# Controllers:      <none>

๊ฐ์‚ฌ ํ•ด์š”!

๋ชจ๋“  3 ๋Œ“๊ธ€

@jason-riddle ํฌ๋“œ์˜ ์ƒ์„ฑ์ž ์ฃผ์„์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋‹ค๊ณ  ์ƒ๊ฐํ•ฉ๋‹ˆ๋‹ค.

@AdoHe ๊ทธ๋Ÿฌ๋‚˜ ๊ทธ๊ฒƒ์€ ๋‚ด๊ฐ€ํ•˜์ง€ ์•Š์€ ์ฒ˜์Œ์— ์„ค์ •๋˜์—ˆ๋‹ค๊ณ  ๊ฐ€์ •ํ•ฉ๋‹ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ๊ท€ํ•˜์˜ ์ œ์•ˆ์€ ๋‹ค์Œ์œผ๋กœ ์ด์–ด์ง‘๋‹ˆ๋‹ค.

์„ค๋ช… ํ˜ธ์ถœ์„ ์‚ฌ์šฉํ•˜๋ฉด Controllers ๋Œ€ํ•ด grepํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

kubectl describe pods dd-agent-4qwo1 | grep Controllers
# Controllers:      DaemonSet/dd-agent

๋‹จ๋… ํฌ๋“œ๊ฐ€ ์‹คํ–‰ ์ค‘์ธ ๊ฒฝ์šฐ Controllers ๋Š” ๋น„์–ด ์žˆ์Šต๋‹ˆ๋‹ค.

kubectl describe pods apache | grep Controllers
# Controllers:      <none>

๊ฐ์‚ฌ ํ•ด์š”!

๋‚˜๋ฅผ ์œ„ํ•ด ์ผํ–ˆ์Šต๋‹ˆ๋‹ค :

kubectl pod <Podname> -n <namespace> | grep "Controlled By"

์ด ํŽ˜์ด์ง€๊ฐ€ ๋„์›€์ด ๋˜์—ˆ๋‚˜์š”?
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