Edu/Support

쿠버네티스(Kubernetes) 환경에서 Redis Scale-Out (확장)

쿠버네티스 환경에서 레디스 확장

1. Redis-Cluster 확장 조언

쿠버네티스의 kubectl scale --replicas 명령으로 파드 수만 늘린다고 해서 Redis-Cluster가 실질적으로 확장되지 않습니다.
아래에서 Redis-Cluster를 실제 확장하는 표준 절차를 간단히 살펴보겠습니다.

① 쿠버네티스 명령으로 레디스 파드를 증설 (예: 6개 ➔ 10개 파드로 확장)
② 레디스 redis-cli --cluster add-node 명령으로 증설된 노드들을 기존 Cluster에 참여시킴
③ 레디스 cluster rebalance 명령으로 슬롯과 데이터(키)를 새로 추가된 레디스 노드들로 이동시킴
여기까지 완료되어야 비로소 Redis-Cluster의 확장이 완료된 것입니다.

💻 부하가 심한 상태(CPU 100%)에서 실시간 확장이 어려운 이유

③번 레디스 'cluster rebalance' 진행 시 슬롯과 데이터를 이동하는 과정에서 상당한 부하가 발생합니다. 기존 Redis-0, 1, 2에서 대용량 데이터를 신규 노드로 이동시켜야 하므로 네트워크 및 CPU 소모가 당연히 발생합니다. 이미 CPU 사용량이 100%인 상태에서 데이터 재배치(Rebalance) 작업까지 추가되면 기존 레디스의 응답시간(Latency)이 급격히 늘어나 서비스 장애로 이어질 수 있습니다.
Rebalance 작업 중 성능 저하: 데이터 이동 중에는 애플리케이션의 키 읽기/쓰기 요청 시 기존 노드와 신규 노드 간에 ASK / MOVED Redirection (기존 레디스에 해당 키가 있는지 묻고, 없으면 새 레디스에 해당 키가 도착했는지 묻는) 과정이 빈번하게 발생하여 응답시간이 떨어지고 CPU 사용률이 더욱 상승합니다.
클러스터 구조적 복잡성: 실제 확장은 마스터 노드의 홀수 개 유지 규칙(3개 ➔ 5개 등)과 1:1 복제(Replica) 구성을 함께 고려해야 하므로, 기존 6개 파드에서 10개 파드로 늘리는 등 다수의 노드를 한 번에 구성해야 하여 Rebalance 과정이 매우 복잡해집니다.
nodes.conf 상태 불일치 및 장애 위험: Rebalance 진행 도중 어떤 이유로든 파드 1~2개가 다운된다면 Redis-Cluster 전체 마비로 번질 수 있습니다. 특히 슬롯 이동 중에 노드가 다운되면 각 파드에 저장된 nodes.conf 파일의 슬롯 소유권 상태 정보가 서로 일치하지 않아 자동 복구가 불가능해질 위험이 높습니다.
[운영 가이드] 따라서 레디스의 부하 증가가 예상된다면, 미리 안정적인 시점(CPU 사용량 60% 이하)에 선제적으로 확장하시거나, 갑작스러운 부하 발생 시에는 부하가 가라앉은 안정된 시점을 기다렸다가 확장을 진행하시기 바랍니다.

🧑‍💻 Redis-Operator를 이용한 자동 확장

Redis-Cluster 자동 확장을 하려면 'Redis-Operator'(별도 제품)를 이용해서 구축 가능합니다.
Redis-Operator가 위에 설명한 'cluster add-node, rebalance' 같은 명령을 실행해 줍니다.
이 경우에도 확장 시점을 정하는 hpa.yaml 파일에 cpu: averageUtilization 값을 높게 설정하는 것은 권장되지 않습니다.

🌐 Redis-Operator 공급(URL)

Redis-Operator (OT-CONTAINER-KIT)
설명: 오픈소스 커뮤니티에서 가장 활발히 사용되는 Redis Operator 중 하나입니다. `RedisCluster` Custom Resource(CRD)를 정의하면 노드 추가, 제거, Failover, Auto-scaling을 알아서 안전하게 처리해 줍니다.
관련 문서/Github: 🔗 redis-operator 🔗 getting-started
Spotahome Redis Operator
설명: Redis-Sentinel 및 Redis-Cluster 아키텍처를 쿠버네티스 컨트롤러 형태로 안전하게 관리할 수 있도록 스페인 테크 기업 Spotahome에서 개발하여 공개한 오퍼레이터입니다.
관련 문서/Github: 🔗 Spotahome Redis Operator
Redis Enterprise K8s Operator (공식 레디스)
설명: Redis.io (Redis Ltd.) 공식 제공 오퍼레이터입니다. K8s HPA 및 Custom Metrics와 연동되어 노드 증설부터 Shard Rebalancing까지의 전 과정을 자동화합니다.
공식 가이드: 🔗 Redis Enterprise K8s Operator

2. Redis-Sentinel 확장 조언

Redis-Sentinel 환경에서 CPU 사용률이 100%에 도달하는 병목 현상은 거의 대부분 Master 노드에서 발생합니다. 단일 Master 구조 특성상 모든 데이터 변경(입력/수정/삭제) 요청 처리가 Master 1곳에 집중되기 때문입니다.

복제 노드(Replica) 증설의 한계: 이미 2개의 복제 노드가 읽기(Read) 트래픽을 분산 처리하고 있으므로, 복제 노드에 CPU 병목이 발생하는 경우는 극히 드뭅니다. 따라서 파드를 추가 증설하는 것은 단지 복제 노드를 1개 더 늘리는 것에 불과하며, Master에 집중된 쓰기(Write) 부하와 CPU 성능 병목을 전혀 해결할 수 없습니다.
읽기(Read) 분산의 한계점: 새로운 복제 노드가 추가되면 Master로부터 전체 데이터를 동기화(Full Resync)받는 과정이 발생합니다. 이 동기화 과정에서 Master 노드에 RDB 생성 및 네트워크 I/O 부하가 추가되어 오히려 Master의 CPU 상태가 악화될 수 있습니다.

💡 결론 및 최적의 대안

Master 부하로 인한 Sentinel 환경의 성능 한계에 직면했을 때, 파드(복제 노드) 증설은 올바른 해결책이 아닙니다. 근본적 해결책(Scale-Out / 아키텍처 전환)은 지속적인 쓰기 트래픽 증가가 예상된다면, 단일 Master 구조인 Sentinel을 벗어나 다중 Master로 쓰기 트래픽을 분산할 수 있는 Redis-Cluster 구조로 아키텍처를 전환해야 합니다.

Redis-Cluster 확장 방법

1. 파드 추가

1) 기존 상태 조회 🧮

redis-cluster-0~5: 6개 파드가 있다.

💻 Terminal

$ kubectl get pods -o wide
NAME               READY   STATUS    RESTARTS   AGE   IP            NODE  
redis-cluster-0    1/1     Running   0          10d   10.42.0.174   rocky9
redis-cluster-1    1/1     Running   0          10d   10.42.0.165   rocky9
redis-cluster-2    1/1     Running   0          10d   10.42.0.167   rocky9
redis-cluster-3    1/1     Running   0          10d   10.42.0.169   rocky9
redis-cluster-4    1/1     Running   0          10d   10.42.0.175   rocky9
redis-cluster-5    1/1     Running   0          10d   10.42.0.173   rocky9

2) 파드 추가: 6개 -> 10개 ⚡

💻 Terminal

$ kubectl scale statefulset redis-cluster --replicas=10

3) 파드 추가 후 확인 🧮

redis-cluster-6~9: 4개 파드 추가 생성 완료

💻 Terminal

$ kubectl get pods -o wide
NAME              READY   STATUS    RESTARTS   AGE     IP            NODE  
redis-cluster-0   1/1     Running   0          10d     10.42.0.174   rocky9
redis-cluster-1   1/1     Running   0          10d     10.42.0.165   rocky9
redis-cluster-2   1/1     Running   0          10d     10.42.0.167   rocky9
redis-cluster-3   1/1     Running   0          10d     10.42.0.169   rocky9
redis-cluster-4   1/1     Running   0          10d     10.42.0.175   rocky9
redis-cluster-5   1/1     Running   0          10d     10.42.0.173   rocky9
redis-cluster-6📍 1/1     Running   0          30m     10.42.0.199   rocky9
redis-cluster-7📍 1/1     Running   0          4m      10.42.0.201   rocky9
redis-cluster-8📍 1/1     Running   0          3m56s   10.42.0.203   rocky9
redis-cluster-9📍 1/1     Running   0          3m52s   10.42.0.205   rocky9

2. Redis-Cluster 노드 추가

마스터로 추가되지만 슬롯이 할당되지 않았으므로 아직 데이터가 들어오지는 않는다.

1) redis-cluster-6 노드 추가: add-node

kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster add-node
redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504
redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504
0번 레디스에 접속해서 6번 레디스를 클러스터에 추가한다.

출력 내용 ▼

💻 Terminal

$ kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster add-node redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504 redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504 
  >>>📍Adding node redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504 to cluster redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504
  >>> Performing Cluster Check (using node redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504)
  M: aa8df00ebc2f7ac3001804dd01b75181249b16e1 redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504
     slots:[0-5460] (5461 slots) master
     1 additional replica(s)
  M: 9eba06300dd9acd8f994aa9faa8765009c7de4e9 10.42.0.167:18504
     slots:[10923-16383] (5461 slots) master
     1 additional replica(s)
  S: 11fae5f5710ff5dff65ea6c7865ca0a628458362 10.42.0.175:18504
     slots: (0 slots) slave
     replicates aa8df00ebc2f7ac3001804dd01b75181249b16e1
  S: 2bc5f1a2020434ee4c5ac46f3d82f5af40b15824 10.42.0.169:18504
     slots: (0 slots) slave
     replicates 9eba06300dd9acd8f994aa9faa8765009c7de4e9
  S: 22e8d5e834490539b58fe66bf3eae9f4cf0d076b 10.42.0.173:18504
     slots: (0 slots) slave
     replicates 6f50eafcd2a642c90b1b3d69cfb3b619342ae9ea
  M: 6f50eafcd2a642c90b1b3d69cfb3b619342ae9ea 10.42.0.165:18504
     slots:[5461-10922] (5462 slots) master
     1 additional replica(s)
  [OK] All nodes agree about slots configuration.
  >>> Check for open slots...
  >>> Check slots coverage...
  [OK] All 16384 slots covered.
  >>> Getting functions from cluster
  >>> Send FUNCTION LIST to redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504 to verify there is no functions in it
  >>> Send FUNCTION RESTORE to redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504
  >>> Send CLUSTER MEET to node redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504 to make it join the cluster.
  [OK]📍New node added correctly.

2) redis-cluster-7 노드 추가: add-node

kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster add-node
redis-cluster-7.redis-cluster-service.default.svc.cluster.local:18504
redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504
0번 레디스에 접속해서 7번 레디스를 클러스터에 추가한다. ⇒ '출력 내용' 생략

3. 슬롯 할당: rebalance

1) 'rebalance' 명령 실행 ⚡

추가된 노드에 슬롯을 할당: 'rebalance' 명령 실행
kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate
--cluster rebalance redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504
--cluster-use-empty-masters
* 옮기는(Moving) 슬롯 개수만큼 '#'이 표시된다. 생략하지 않고 다 표시했습니다.
* 이동하는 키 개수만큼 시간이 걸린다.

💻 Terminal

$ kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster rebalance redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504 --cluster-use-empty-masters
>>> Performing Cluster Check (using node redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504)
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
>>> Rebalancing across 5 nodes. Total weight = 5.00
Moving 2185 slots from redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504 to 10.42.0.199:18504
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Moving 1093 slots from 10.42.0.167:18504 to 10.42.0.199:18504
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Moving 2186 slots from 10.42.0.165:18504 to 10.42.0.201:18504
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Moving 1092 slots from 10.42.0.167:18504 to 10.42.0.201:18504
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2) 슬롯 할당 확인

💻 Terminal

$ kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster info redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504  
  10.42.0.174:18504 (aa8df00e...) -> 1943162 keys | 3276 slots | 1 slaves.
  10.42.0.165:18504 (6f50eafc...) -> 1843206 keys | 3276 slots | 1 slaves.
  10.42.0.167:18504 (9eba0630...) -> 1853574 keys | 3276 slots | 1 slaves.
  redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504 (3c3052df...) -> 1915097 keys | 3278 slots | 0 slaves.
  10.42.0.201:18504 (6833a70e...) -> 1850068 keys | 3278 slots | 0 slaves.
  [OK] 9405107 keys in 5 masters.
  574.04 keys per slot on average.

3) Redis-Cluster 상태 확인: cluster info

💻 Terminal

$ kubectl exec -it redis-cluster-0 -- redis-cli -p 18504 -a redisgate cluster info
  cluster_state:ok
  cluster_slots_assigned:16384  
  cluster_slots_ok:16384   ➡ 슬롯 할당 OK
  cluster_slots_pfail:0
  cluster_slots_fail:0
  cluster_known_nodes:8    ➡ 총 8개 노드
  cluster_size:5           ➡ 마스터 5개 노드

4) Redis-Cluster 상태 확인: cluster nodes

💻 Terminal

$ kubectl exec -it redis-cluster-0 -- redis-cli -p 18504 -a redisgate cluster nodes
  aa8df00ebc2f7ac3001804dd01b75181249b16e1 10.42.0.174:18504@28504,redis-cluster-0.redis-cluster-service.default.svc.cluster.local myself,master - 0 0 8 connected 2185-5460
  6f50eafcd2a642c90b1b3d69cfb3b619342ae9ea 10.42.0.165:18504@28504,redis-cluster-1.redis-cluster-service.default.svc.cluster.local master - 0 1788459747000 2 connected 7647-10922
  9eba06300dd9acd8f994aa9faa8765009c7de4e9 10.42.0.167:18504@28504,redis-cluster-2.redis-cluster-service.default.svc.cluster.local master - 0 1788459747000 3 connected 13108-16383
  2bc5f1a2020434ee4c5ac46f3d82f5af40b15824 10.42.0.169:18504@28504,redis-cluster-3.redis-cluster-service.default.svc.cluster.local slave 9eba06300dd9acd8f994aa9faa8765009c7de4e9 0 1788459747540 3 connected 
  11fae5f5710ff5dff65ea6c7865ca0a628458362 10.42.0.175:18504@28504,redis-cluster-4.redis-cluster-service.default.svc.cluster.local slave aa8df00ebc2f7ac3001804dd01b75181249b16e1 0 1788459747540 8 connected 
  22e8d5e834490539b58fe66bf3eae9f4cf0d076b 10.42.0.173:18504@28504,redis-cluster-5.redis-cluster-service.default.svc.cluster.local slave 6f50eafcd2a642c90b1b3d69cfb3b619342ae9ea 0 1788459747039 2 connected 
  3c3052df9a617dd2c17caa3d7ba2d5451d8a557f 10.42.0.199:18504@28504,redis-cluster-6.redis-cluster-service.default.svc.cluster.local master - 0 1788459746536 11 connected 0-2184 12015-13107
  6833a70e8b331850db3025eee0061334c25d42de 10.42.0.201:18504@28504,redis-cluster-7.redis-cluster-service.default.svc.cluster.local master - 0 1788459747000 10 connected 5461-7646 10923-12014

4. 8, 9번 노드 추가

8, 9번 노드를 복제(Replica)로 추가한다.

1) 8번 노드 추가: add-node --cluster-slave

kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster add-node
redis-cluster-8.redis-cluster-service.default.svc.cluster.local:18504
redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504 --cluster-slave
8번 노드를 6번 노드의 복제(Salve)로 추가한다.
옵션 '--cluster-slave' 사용: 🚨 '--cluster-replica' 옵션은 사용불가 (Redis-8.8.2 redis-cli.c 소스 확인)

출력 내용 ▼

💻 Terminal

$ kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster add-node redis-cluster-8.redis-cluster-service.default.svc.cluster.local:18504 redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504 --cluster-slave  
  >>>📍Adding node redis-cluster-8.redis-cluster-service.default.svc.cluster.local:18504 to cluster redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504
  >>> Performing Cluster Check (using node redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504)
  M: 3c3052df9a617dd2c17caa3d7ba2d5451d8a557f redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504
     slots:[0-2184],[12015-13107] (3278 slots) master
  M: 6833a70e8b331850db3025eee0061334c25d42de 10.42.0.201:18504
     slots:[5461-7646],[10923-12014] (3278 slots) master
  S: 2bc5f1a2020434ee4c5ac46f3d82f5af40b15824 10.42.0.169:18504
     slots: (0 slots) slave
     replicates 9eba06300dd9acd8f994aa9faa8765009c7de4e9
  M: 9eba06300dd9acd8f994aa9faa8765009c7de4e9 10.42.0.167:18504
     slots:[13108-16383] (3276 slots) master
     1 additional replica(s)
  M: aa8df00ebc2f7ac3001804dd01b75181249b16e1 10.42.0.174:18504
     slots:[2185-5460] (3276 slots) master
     1 additional replica(s)
  S: 11fae5f5710ff5dff65ea6c7865ca0a628458362 10.42.0.175:18504
     slots: (0 slots) slave
     replicates aa8df00ebc2f7ac3001804dd01b75181249b16e1
  S: 22e8d5e834490539b58fe66bf3eae9f4cf0d076b 10.42.0.173:18504
     slots: (0 slots) slave
     replicates 6f50eafcd2a642c90b1b3d69cfb3b619342ae9ea
  M: 6f50eafcd2a642c90b1b3d69cfb3b619342ae9ea 10.42.0.165:18504
     slots:[7647-10922] (3276 slots) master
     1 additional replica(s)
  [OK] All nodes agree about slots configuration.
  >>> Check for open slots...
  >>> Check slots coverage...
  [OK] All 16384 slots covered.
  Automatically selected master redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504
  >>> Send ➡ CLUSTER MEET to node redis-cluster-8.redis-cluster-service.default.svc.cluster.local:18504 to make it join the cluster.
  Waiting for the cluster to join  
  >>> Configure node as replica of redis-cluster-6.redis-cluster-service.default.svc.cluster.local:18504.
  [OK]📍New node added correctly.

2) 9번 노드 추가: add-node --cluster-slave

kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster add-node
redis-cluster-9.redis-cluster-service.default.svc.cluster.local:18504
redis-cluster-7.redis-cluster-service.default.svc.cluster.local:18504 --cluster-slave
9번 노드를 7번 노드의 복제(Salve)로 추가한다. ⇒ '출력 내용' 생략

3) 추가된 복제 노드 확인

8, 9번이 복제(slave)로 추가 되었는지 확인: IP 199, 201 노드의 slaves가 '0'에서 '1'로 변경됨.

💻 Terminal

$ kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster info redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504 
  redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504 (aa8df00e...) -> 1943162 keys | 3276 slots | 1 slaves.
  10.42.0.165:18504 (6f50eafc...) -> 1843206 keys | 3276 slots | 1 slaves.
  10.42.0.167:18504 (9eba0630...) -> 1853574 keys | 3276 slots | 1 slaves.
  10.42.0.199:18504 (3c3052df...) -> 1915097 keys | 3278 slots |📍1 slaves.
  10.42.0.201:18504 (6833a70e...) -> 1850068 keys | 3278 slots |📍1 slaves.
  [OK] 9405107 keys in 5 masters.
  574.04 keys per slot on average.

4) 추가된 복제 노드 확인

출력 결과를 보기 쉽게 정리했다.

💻 Terminal

$ kubectl exec -it redis-cluster-0 -- redis-cli -a redisgate --cluster call redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504 role  
  >>> Calling role
  redis-cluster-0.redis-cluster-service.default.svc.cluster.local:18504: master
  10.42.0.165:18504: master
  10.42.0.167:18504: master
  10.42.0.201:18504: master
  10.42.0.199:18504: master
  10.42.0.169:18504: slave
  10.42.0.175:18504: slave
  10.42.0.173:18504: slave
  10.42.0.203:18504: slave
  10.42.0.205:18504: slave

5) 최종 결과 파드 확인 🧮

💻 Terminal

$ kubectl get pods -o wide
NAME              READY   STATUS    RESTARTS   AGE   IP            NODE  
redis-cluster-0   1/1     Running   0          10d   10.42.0.174   rocky9
redis-cluster-1   1/1     Running   0          11d   10.42.0.165   rocky9
redis-cluster-2   1/1     Running   0          11d   10.42.0.167   rocky9
redis-cluster-3   1/1     Running   0          11d   10.42.0.169   rocky9
redis-cluster-4   1/1     Running   0          10d   10.42.0.175   rocky9
redis-cluster-5   1/1     Running   0          11d   10.42.0.173   rocky9
redis-cluster-6   1/1     Running   0          10h   10.42.0.199   rocky9
redis-cluster-7   1/1     Running   0          10h   10.42.0.201   rocky9
redis-cluster-8   1/1     Running   0          10h   10.42.0.203   rocky9
redis-cluster-9   1/1     Running   0          10h   10.42.0.205   rocky9

6) 메모리 확인 🧮

💻 Terminal

$ kubectl top pods
NAME              CPU(cores)   MEMORY(bytes)   
redis-cluster-0   2m           387Mi           
redis-cluster-1   2m           656Mi           
redis-cluster-2   2m           660Mi           
redis-cluster-3   2m           659Mi           
redis-cluster-4   2m           386Mi           
redis-cluster-5   2m           658Mi           
redis-cluster-6   2m           337Mi           
redis-cluster-7   2m           327Mi           
redis-cluster-8   2m           337Mi           
redis-cluster-9   2m           329Mi           

$ kubectl exec -it redis-cluster-0 -- redis-cli -p 18504 -a redisgate info memory
# Memory
used_memory_human:371.43M
used_memory_rss_human:392.29M

$ kubectl exec -it redis-cluster-1 -- redis-cli -p 18504 -a redisgate info memory
# Memory
used_memory_human:444.58M
used_memory_rss_human:662.25M

$ kubectl exec -it redis-cluster-6 -- redis-cli -p 18504 -a redisgate info memory
# Memory
used_memory_human:327.70M
used_memory_rss_human:344.34M

7) 🖧 Redis-Cluster 최종 파드 다이어그램

┌────────────────┐ ┌────────────────┐ ┌───────────────┐ ┌────────────────┐ ┌────────────────┐ │ Redis-0(174) │ │ Redis-1(165) │ │ Redis-2(167) │ │ Redis-6(199) │ │ Redis-7(201) │ │ 🟢Master-1 │ │ 🟢Master-2 │ │ 🟢Master-3 │ │ 🟢Master-4 │ │ 🟢Master-5 │ └──────┬─────────┘ └──────┬─────────┘ └──────┬────────┘ └───────┬────────┘ └───────┬────────┘ │ │ │ │ │ │ ┌──────────────────│────────────────────┘ │ │ │ │ └────────────────────┐ │ │ └──────────────────┐ │ │ │ │ │ │ │ │ ▼ ▼ ▼ ▼ ▼ ┌────────────────┐ ┌────────────────┐ ┌───────────────┐ ┌────────────────┐ ┌────────────────┐ │ Redis-3(169) │ │ Redis-4(175) │ │ Redis-5(173) │ │ Redis-8(203) │ │ Redis-9(205) │ │ 🟡Replica-1 │ │ 🟡Replica-2 │ │ 🟡Replica-3 │ │ 🟡Replica-4 │ │ 🟡Replica-5 │ └────────────────┘ └────────────────┘ └───────────────┘ └────────────────┘ └────────────────┘

🧑‍💻 정리

쿠버네티스 환경에서 Redis-Cluster 파드 확장을 완료하였습니다.

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