Add tolerations to controller-statefulset and deamonset

[slashben]

User description

Tolerations in workloads in the Helm chart were missing the ability to be controlled. In this PR I am adding this capability.

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Type

enhancement

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Description

• Introduced templating for tolerations in the Helm chart to support dynamic configuration.
• Replaced static tolerations in DaemonSet with a templated approach, allowing for customization through values.
• Defined default tolerations in values.yaml to ensure backward compatibility and provide a base configuration.

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Changes walkthrough

	Relevant files
Enhancement	controller-statefulset.yaml Add Dynamic Tolerations to StatefulSet Template                    chart/kubecop/templates/controller-statefulset.yaml Added templating for tolerations to allow dynamic configuration based on values. +2/-0      deamonset.yaml Replace Static Tolerations with Templated Ones in DaemonSet chart/kubecop/templates/deamonset.yaml Replaced static tolerations with templated tolerations to support dynamic configuration. +1/-4
Configuration changes	values.yaml Define Default Tolerations in Values                                          chart/kubecop/values.yaml Defined default tolerations for NoSchedule and NoExecute effects. +5/-1

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PR Description updated to latest commit (23043e3)

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PR Review

⏱️ Estimated effort to review [1-5]	2, because the changes are straightforward and involve templating and configuration adjustments in Helm charts. The complexity is low, and the main task is to verify the correct implementation of templating and default values.
🧪 Relevant tests	No
🔍 Possible issues	Templating Error: Ensure that the templating syntax used in .Values.tolerations | nindent 8 is correctly implemented and tested. Incorrect templating can lead to malformed YAML when the Helm chart is rendered.
	Default Tolerations Impact: The introduction of default tolerations in values.yaml might change the scheduling behavior of the pods for existing deployments that upgrade to this version without specifying custom tolerations. It's important to document this change and its potential impact.
🔒 Security concerns	No

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PR Code Suggestions

Category	Suggestions
Maintainability	Verify and adjust the indentation of the tolerations block to ensure YAML structure correctness. Ensure that the indentation for the tolerations block under the spec is consistent with the rest of the file. The nindent function is used to add a newline and indent the output of .Values.tolerations to 8 spaces. However, it's important to verify that this indentation aligns correctly within the YAML structure, especially within lists or nested objects. chart/kubecop/templates/controller-statefulset.yaml [55-56] tolerations: - {{- toYaml .Values.tolerations | nindent 8 }} +{{- toYaml .Values.tolerations | nindent 8 }}
Enhancement	Ensure the values.yaml covers all necessary tolerations previously hardcoded in the DaemonSet template. Since the tolerations are now dynamically set from .Values.tolerations, ensure that the default values provided in values.yaml cover all necessary use cases previously hardcoded in the DaemonSet template. This change enhances flexibility but requires careful documentation to ensure users are aware of how to configure tolerations according to their needs. chart/kubecop/templates/deamonset.yaml [173] tolerations: - {{- toYaml .Values.tolerations | nindent 8 }} +{{- toYaml .Values.tolerations | nindent 8 }}
Best practice	Add comments to document the tolerations section in values.yaml. Consider providing a comment or documentation snippet above the tolerations section in values.yaml to explain its purpose and how users can customize it. This helps in making the Helm chart more user-friendly and self-documenting, especially for new users who might not be familiar with Kubernetes tolerations. chart/kubecop/values.yaml [95-99] +# Tolerations allow you to schedule your pods on tainted nodes. Customize as needed. tolerations: - effect: NoSchedule operator: Exists - effect: NoExecute operator: Exists
	Add a fallback mechanism for tolerations in the DaemonSet template. After the modification to use .Values.tolerations, ensure that there's a fallback or default value mechanism in place within the template to handle cases where tolerations might not be defined by the user in values.yaml. This can prevent deployment issues in environments where no tolerations are specified. chart/kubecop/templates/deamonset.yaml [173] tolerations: +{{- if .Values.tolerations }} {{- toYaml .Values.tolerations | nindent 8 }} +{{- else }} + # Default tolerations can be specified here +{{- end }}
	Validate the structure of tolerations in .Values.tolerations to ensure they meet Kubernetes API expectations. It's a good practice to validate the structure and content of the tolerations field in .Values.tolerations to ensure they meet Kubernetes API expectations. This can be done through schema validation in the Chart's values.schema.json, if available, to prevent runtime errors and ensure users input valid configurations. chart/kubecop/templates/controller-statefulset.yaml [55-56] +# Ensure to validate .Values.tolerations structure in values.schema.json tolerations: - {{- toYaml .Values.tolerations | nindent 8 }} +{{- toYaml .Values.tolerations | nindent 8 }}

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