helm/kubernetes not installing all cronjobs in list - kubernetes

Question

I have a helm chart which involves a loop over a range of values. The chart includes a statefulset, pvc and cronjob. If I pass it a list with 4 values, all is well, but if I pass it a list of 12 values, most of the cronjobs just don't appear in the final template (i.e. using helm install --dry-run --debug).
Can anyone explain what might be causing this? I googled to see if I could find information about maximum length of templates but couldn't find anything...
helm template creates the manifest just fine, so maybe it's kubernetes is rejecting the cronjobs for some reason?
Is there a recommended approach for when you need to create many almost-duplicates of a manifest?
EXAMPLE: The chart template looks something like this
{{ $env := .Release.Namespace }}
{{ $image_tag := .Values.image_tag }}
{{ $aws_account_id := .Values.aws_account_id }}
{{- range $collector := .Values.collectors }}
apiVersion: v1
kind: Service
metadata:
name: {{ $colname }}
labels:
app: {{ $colname }}
spec:
ports:
- port: 80
name: web
clusterIP: None
selector:
app: {{ $colname }}
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: {{ $colname }}
labels:
app: {{ $colname }}
spec:
selector:
matchLabels:
app: {{ $colname }}
serviceName: {{ $colname }}
replicas: 1
template:
metadata:
labels:
app: {{ $colname }}
spec:
securityContext:
fsGroup: 1000
containers:
- name: {{ $colname }}
imagePullPolicy: Always
image: {{ $aws_account_id }}.dkr.ecr.eu-west-1.amazonaws.com/d:{{ $image_tag }}
volumeMounts:
- name: {{ $colname }}-a-claim
mountPath: /home/me/a
- name: {{ $colname }}-b-claim
mountPath: /home/me/b
- name: {{ $colname }}-c-claim
mountPath: /home/me/c
env:
- name: COLLECTOR
value: {{ $collector }}
- name: ENV
value: {{ $env }}
volumeClaimTemplates:
- metadata:
name: {{ $colname }}-a-claim
spec:
accessModes:
- ReadWriteOnce
storageClassName: gp2
resources:
requests:
storage: 50Gi
- metadata:
name: {{ $colname }}-b-claim
spec:
accessModes:
- ReadWriteOnce
storageClassName: gp2
resources:
requests:
storage: 10Gi
- metadata:
name: {{ $colname }}-c-claim
spec:
accessModes:
- ReadWriteOnce
storageClassName: gp2
resources:
requests:
storage: 10Gi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: {{ $colname }}-c-claim
spec:
accessModes:
- ReadWriteOnce
storageClassName: gp2
resources:
requests:
storage: 20Gi
---
apiVersion: batch/v1beta1
kind: CronJob
metadata:
name: {{ $colname }}-cron
spec:
schedule: {{ $update_time }}
jobTemplate:
spec:
template:
spec:
securityContext:
fsGroup: 1000
containers:
- name: {{ $colname }}
image: {{ $aws_account_id }}.dkr.ecr.eu-west-1.amazonaws.com/d:{{ $image_tag }}
env:
- name: COLLECTOR
value: {{ $collector_name }}
volumeMounts:
- name: c-storage
mountPath: /home/me/c
restartPolicy: Never
volumes:
- name: c-storage
persistentVolumeClaim:
claimName: {{ $colname }}-c-claim
---
{{ end }}
and I'm passing values like:
collectors:
- name: a
- name: b
- name: c
- name: d
- name: e
- name: f
- name: g
- name: h
- name: i
- name: j
- name: k
- name: l