By default, the Deployment in Kubernetes retains 10 ReplicaSets [1]. This number can be configured by setting the .spec.revisionHistoryLimit to a desired number.
The following is an example on how to retain just 3 old ReplicaSets in my ‘’n8n’’ Deployment.
➜ k get replicasets -n n8n
NAME DESIRED CURRENT READY AGE
n8n-57c89d6b7d 0 0 0 91d
n8n-5f9fb9c459 0 0 0 80d
n8n-666b9476f 0 0 0 80d
n8n-66cd6bd8c6 1 1 1 74d
n8n-6888cc89bd 0 0 0 91d
n8n-7466c456f8 0 0 0 91d
n8n-74dfd6cb8c 0 0 0 80d
n8n-f8f8f6d7b 0 0 0 237d
Let set .spec.revisionHistoryLimit to 3:
➜ git diff 15.n8n-deployment.yaml
apps/n8n/15.n8n-deployment.yaml
──────────┐
12: spec: │
──────────┴──────────────────────────────────────────────────────────────────────────────────────────────────────
│ 12 │ service: n8n │ 12 │ service: n8n
│ 13 │ strategy: │ 13 │ strategy:
│ 14 │ type: Recreate │ 14 │ type: Recreate
│ │ │ 15 │ revisionHistoryLimit: 3
│ 15 │ template: │ 16 │ template:
│ 16 │ metadata: │ 17 │ metadata:
│ 17 │ labels: │ 18 │ labels:
➜ kubeclt apply -f 15.n8n-deployment.yaml
Verify the result:
➜ k get replicasets -n n8n
NAME DESIRED CURRENT READY AGE
n8n-5f9fb9c459 0 0 0 80d
n8n-666b9476f 0 0 0 80d
n8n-66cd6bd8c6 1 1 1 74d
n8n-74dfd6cb8c 0 0 0 80d
References: