JSON schema for flink-job

[iblutrifork]

Add JSON schema for flink-job

Continuation of #95
Implementing https://jira.trifork.com/browse/KAMDP-341

Used the following script to verify existing charts:

kubectl get helmreleases.helm.toolkit.fluxcd.io --all-namespaces -o yaml > releases.tmp
yq '.items | map(select(.spec.chart.spec.chart == "flink-job")) | .[].spec.values | split_doc' releases.tmp > filtered.tmp
for i in `seq 0 30` ; do yq "select(di == ${i})" filtered.tmp | yq 'load("values.yaml") *= .' > "${i}.tmp" ; done
for i in `seq 0 30` ; do if [ `cat "${i}.tmp" | wc -l` -gt 1 ] ; then helm lint . --values "${i}.tmp" ; fi ; done

for i in `seq 0 30` ; do rm "${i}.tmp" ; done
rm filtered.tmp
rm releases.tmp

[AndersBennedsgaard]

It would be nice to be able to remove many/all of the fail and required fields in https://github.com/trifork/cheetah-charts/blob/main/charts/flink-job/templates/_helpers.tpl.
Such as

cheetah-charts/charts/flink-job/templates/_helpers.tpl

Line 145 in 998e095

{{- $name := required "topics.name is required" .name -}}

which says that topics[*].name is required, and

cheetah-charts/charts/flink-job/templates/_helpers.tpl

Line 151 in 998e095

{{- fail (printf "Topic type %s not understood. Allowed values are: input, output" .type) -}}

which says that topics[*].type must be input or output

[AndersBennedsgaard]

Small change, but otherwise LGTM 😄