Add default path to Ingress paths

[sergeyshaykhullin]

Problem

For now you are using empty array for ingress paths option as a default

In ingress helm template used range, so empty array by default renders as invalid k8s Ingress resource and to deploy this chart i have to specify paths. In most cases default path is /

Examples

Some examples of ingress values, most of them using / as default:

• Minio: https://github.com/minio/charts/blob/fe46d0cdf8cd7054aac12cc6870a3416ebc2a6cc/minio/values.yaml#L168
• Grafana: https://github.com/prometheus-community/helm-charts/blob/a72459c5a1a5672c0bcd812a5a078ec4517693d2/charts/kube-prometheus-stack/values.yaml#L542
• ArgoCD: https://github.com/argoproj/argo-helm/blob/9ed4650b9f397414e9e88ca16b0653833be0e963/charts/argo-cd/values.yaml#L469
• RabbitMQ: https://github.com/bitnami/charts/blob/a4b58334911f6994ecce978132a4ee3121dfe155/bitnami/rabbitmq/values.yaml#L623

Another approach is to use fallback for paths when empty, but it is overkill for charts is not overriding application path

• Prometheus: https://github.com/prometheus-community/helm-charts/blob/a72459c5a1a5672c0bcd812a5a078ec4517693d2/charts/kube-prometheus-stack/templates/prometheus/ingress.yaml#L5

That will is fixed

This fixes k8s validation error on helm install (Ansible used):
fatal: [node1]: FAILED! => {"changed": false, "command": "/usr/local/bin/helm --namespace=akhq --version=0.1.3 upgrade -i --reset-values -f=/tmp/tmpvs_giipm.yml akhq akhq/akhq", "msg": "Failure when executing Helm command. Exited 1.\nstdout: \nstderr: Error: UPGRADE FAILED: error validating \"\": error validating data: ValidationError(Ingress.spec.rules[0].http): missing required field \"paths\" in io.k8s.api.networking.v1beta1.HTTPIngressRuleValue\n", "stderr": "Error: UPGRADE FAILED: error validating \"\": error validating data: ValidationError(Ingress.spec.rules[0].http): missing required field \"paths\" in io.k8s.api.networking.v1beta1.HTTPIngressRuleValue\n", "stderr_lines": ["Error: UPGRADE FAILED: error validating \"\": error validating data: ValidationError(Ingress.spec.rules[0].http): missing required field \"paths\" in io.k8s.api.networking.v1beta1.HTTPIngressRuleValue"], "stdout": "", "stdout_lines": []}

[tchiotludo]

Sorry I forgot this one.
To be honest, I've a doubt about this one ?
You are change [] to [ - "/" ], how the user can override (remove) this default path ?
Is this not better to add a control (if empty set to /) on the helm charts ?

[sergeyshaykhullin]

@tchiotludo To override default path just use [/override]. You can set [],but it is generating invalid manifest and can't be applied, so this behavior by default is strange

No, there is no need for fallbacks