Netscaler HA Configuration

IBM Cloud์—์„œ ์ œ๊ณตํ•˜๋Š” Load Balancer ์ค‘์— Network Throughput ๊ธฐ์ค€์œผ๋กœ ๊ตฌ๋งค ๊ฐ€๋Šฅํ•œ Netscaler HA ๊ตฌ์„ฑ ๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด ์ž‘์„ฑํ•˜์˜€์Šต๋‹ˆ๋‹ค.

Load Balancer๋Š” ์ผ๋ฐ˜์ ์œผ๋กœ Web Server ์•ž์— ์œ„์น˜ํ•˜์—ฌ, Traffic์„ Balancing ํ•ด์ฃผ๋Š” ์—ญํ• ์„ ํ•˜๊ณ  ์žˆ๋Š”๋ฐ Load Balancer์— ๋ฌธ์ œ๊ฐ€ ๋ฐœ์ƒํ•˜๋ฉด ์ „์ฒด ์›น ์„œ๋น„์Šค๊ฐ€ ์ค‘๋‹จ๋˜๋Š” SPOF(Single Point Of Failure)์˜ ๋ฌธ์ œ์ ์„ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
๋”ฐ๋ผ์„œ ์ด๋ฅผ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•ด, Load Balancer์— HA(High Availability) ์˜ต์…˜์„ ์„ค์ •ํ•˜์—ฌ ์„œ๋น„์Šค๋ฅผ ๊ตฌ์„ฑํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

ํ•„์š” ์‚ฌํ•ญ :
– Netscaler VPX 2๋Œ€(Active 1๋Œ€, Standby 1๋Œ€)

Control.softlayer.com์—์„œ SSL VPN์„ ์—ฐ๊ฒฐํ•œ ํ›„, Netscaler VPX ๊ด€๋ฆฌํŽ˜์ด์ง€๋กœ ์ ‘์†ํ•ฉ๋‹ˆ๋‹ค.

๊ด€๋ฆฌํŽ˜์ด์ง€์— ์ ‘์†ํ•œ ํ›„, Congifuration ํƒญ > System ๋ฉ”๋‰ด > High Availability ๋กœ ์ ‘์†ํ•˜์—ฌ โ€˜Addโ€™ ๋ฒ„ํŠผ์„ ํด๋ฆญํ•ฉ๋‹ˆ๋‹ค.

Create HA Node ์ฐฝ์—์„œ HA๋กœ ๋ฌถ์„ Standby์šฉ Netscaler์˜ Private IP๋ฅผ ์ž…๋ ฅ ํ›„ ๊ณ„์ • ์ •๋ณด๋ฅผ ์ž…๋ ฅํ•˜์—ฌ ์ƒ์„ฑํ•ฉ๋‹ˆ๋‹ค.

์„ค์ • ์™„๋ฃŒ ํ›„, HA ํ•ญ๋ชฉ์˜ Master State๋ฅผ ๋ณด๋ฉด Primary์™€ Secondary๋กœ ์„ค์ •๋˜์–ด ์žˆ๋Š” ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

HA๊ฐ€ ๊ตฌ์„ฑ์ด ์ž˜ ๋˜์—ˆ๋Š”์ง€ ํ™•์ธํ•˜๊ธฐ ์œ„ํ•ด, โ€˜Force Failoverโ€™ ๋ฉ”๋‰ด๋ฅผ ์„ ํƒํ•˜์—ฌ Failover๋ฅผ ์ง„ํ–‰ํ•ฉ๋‹ˆ๋‹ค.

Failover ์‹คํ–‰ ์‹œ ๋œจ๋Š” ๊ฒฝ๊ณ  ์ฐฝ์˜ โ€˜Yesโ€™ ๋ฒ„ํŠผ์„ ํด๋ฆญํ•ฉ๋‹ˆ๋‹ค.

Load Balancer์˜ VIP๋กœ Ping์„ ๋ณด๋‚ด๋Š” ์ค‘ Failover๊ฐ€ ์ผ์–ด๋‚˜๋ฉด, Ping 1๊ฐœ๊ฐ€ Loss ๋˜๋Š” ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์œผ๋ฉฐ, ๊ธฐ์กด Active ์žฅ๋น„๊ฐ€ Secondary๋กœ, Standby์žฅ๋น„๊ฐ€ Active๋กœ ๋ณ€๊ฒฝ๋˜๋Š” ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

ํ† ๋ก  ์ฐธ๊ฐ€

์ด๋ฉ”์ผ์€ ๊ณต๊ฐœ๋˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค. ํ•„์ˆ˜ ์ž…๋ ฅ์ฐฝ์€ * ๋กœ ํ‘œ์‹œ๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค