add general squid helm chart

[DaMandal0rian]

Type

enhancement

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Description

• Introduced a comprehensive Helm chart for deploying the "general-squid" application on Kubernetes.
• Added various Kubernetes resources like ConfigMaps, Secrets, and Service Accounts to manage configuration and security.
• Defined roles and role bindings for access control within the Kubernetes namespace.
• Configured services, ingress, and load balancers for network traffic management and external access.
• Set up autoscaling, persistent volumes, and resource quotas to manage application scaling and resource allocation.

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Changes walkthrough

	Relevant files
Enhancement	2 files _helpers.tpl Add Helper Templates for Helm Chart                                            explorer/k8s/helm/general-squid/templates/_helpers.tpl Added helper templates for generating names, labels, and service account names. Defined templates for chart name and version, common labels, and selector labels. +60/-0    hpa.yaml Configure Horizontal Pod Autoscaler for Scaling                    explorer/k8s/helm/general-squid/templates/hpa.yaml Configured Horizontal Pod Autoscaler based on CPU and memory metrics. +46/-0
Configuration changes	20 files .helmignore Create .helmignore File for Helm Packaging                              explorer/k8s/helm/general-squid/.helmignore Created a .helmignore file to specify patterns to ignore during Helm packaging. +23/-0    Chart.yaml Initialize Helm Chart Metadata                                                      explorer/k8s/helm/general-squid/Chart.yaml Set up the basic metadata for the Helm chart including version and app version. +24/-0    explorer-env-file Configure Environment Variables for Services                          explorer/k8s/helm/general-squid/config/explorer-env-file Configured environment variables for database and network endpoints. +8/-0      acme-certificate.yaml Setup Let's Encrypt ClusterIssuer for Certificates              explorer/k8s/helm/general-squid/misc/acme-certificate.yaml Defined a ClusterIssuer for managing certificates with Let's Encrypt. +20/-0    clusterroles.yaml Define ClusterRoles and Bindings for Access Control            explorer/k8s/helm/general-squid/templates/clusterroles.yaml Defined ClusterRoles and ClusterRoleBindings for various permissions. +55/-0    configmap.yaml Create ConfigMap for Service Configuration                              explorer/k8s/helm/general-squid/templates/configmap.yaml Created a ConfigMap to store environment configuration for services. +13/-0    ingress.yaml Setup Ingress Resources for External Access                            explorer/k8s/helm/general-squid/templates/ingress.yaml Set up Ingress resources for external access, including TLS configuration. +45/-0    loadbal-svc.yaml Define LoadBalancer Service for Traffic Distribution          explorer/k8s/helm/general-squid/templates/loadbal-svc.yaml Defined a LoadBalancer service for distributing network traffic. +26/-0    namespace.yaml Create Namespace for Helm Deployment                                          explorer/k8s/helm/general-squid/templates/namespace.yaml Created a Kubernetes namespace for the Helm deployment. +6/-0      postgres-configmap.yaml Configure PostgreSQL Settings via ConfigMap                            explorer/k8s/helm/general-squid/templates/postgres-configmap.yaml Configured PostgreSQL settings through a ConfigMap. +27/-0    pv.yaml Setup PersistentVolume for Storage                                              explorer/k8s/helm/general-squid/templates/pv.yaml Setup a PersistentVolume for storage needs. +15/-0    pvc.yaml Create PersistentVolumeClaim for Storage Management            explorer/k8s/helm/general-squid/templates/pvc.yaml Created a PersistentVolumeClaim for managing storage allocation. +17/-0    quota.yaml Establish Resource Quotas for Namespace                                    explorer/k8s/helm/general-squid/templates/quota.yaml Established resource quotas for CPU and memory in the namespace. +11/-0    roles.yaml Define Roles and Role Bindings for Access Management          explorer/k8s/helm/general-squid/templates/roles.yaml Defined various roles and role bindings for different levels of access. +141/-0  secrets.yaml Create Secrets for Sensitive Information Storage                  explorer/k8s/helm/general-squid/templates/secrets.yaml Created secrets for securely storing sensitive information. +9/-0      service.yaml Configure Service for Application Network Access                  explorer/k8s/helm/general-squid/templates/service.yaml Configured a service for network access to the application. +23/-0    serviceaccount.yaml Create Service Accounts for Operational Roles                        explorer/k8s/helm/general-squid/templates/serviceaccount.yaml Created service accounts for different operational roles. +21/-0    statefulset.yaml Configure StatefulSet for Application Deployment                  explorer/k8s/helm/general-squid/templates/statefulset.yaml Configured a StatefulSet for managing stateful application deployment. +168/-0  storageclass.yaml Define StorageClass for Storage Management                              explorer/k8s/helm/general-squid/templates/storageclass.yaml Defined a StorageClass for managing storage types. +5/-0      values.yaml Set Default Values for Helm Chart Configuration                    explorer/k8s/helm/general-squid/values.yaml Set default values for the Helm chart, including image repositories, service configurations, and resource limits. +178/-0
Documentation	1 files NOTES.txt Add Access Instructions for Various Service Types                explorer/k8s/helm/general-squid/templates/NOTES.txt Provided instructions for accessing the application based on different service types. +22/-0

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[github-actions]

PR Description updated to latest commit (27c5248)

[github-actions]

PR Review

⏱️ Estimated effort to review [1-5]	3, because the PR introduces a comprehensive Helm chart for deploying a Kubernetes application, which involves multiple Kubernetes resources and configurations. The complexity and size of the PR require a detailed review to ensure that all configurations are correct and secure, especially given the inclusion of sensitive data handling and network configurations.
🧪 Relevant tests	No
🔍 Possible issues	Possible Security Concern: The PR includes hard-coded sensitive information in the values.yaml file under the postgres section, which includes default passwords. This could lead to security vulnerabilities if not properly managed in production environments.
	Configuration Concern: The ingress configuration in values.yaml is set to enabled: false by default, which might be overlooked and lead to accessibility issues if not configured during deployment.
🔒 Security concerns	- Sensitive Information Exposure: The default values for PostgreSQL credentials are set in the values.yaml, which could be exposed if not overridden in production. It is crucial to ensure these values are securely managed and overridden in production environments.

Code feedback:

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relevant file	explorer/k8s/helm/general-squid/values.yaml
suggestion	Consider removing or securing the default credentials for PostgreSQL to prevent potential security risks. Use Kubernetes secrets or external secret management tools to inject these values at runtime. [important]
relevant line	postgresPassword: postgres

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relevant file	explorer/k8s/helm/general-squid/values.yaml
suggestion	Set the default value of ingress.enabled to true or provide clear documentation to ensure it is configured during deployment to avoid accessibility issues. [medium]
relevant line	enabled: false

---

relevant file	explorer/k8s/helm/general-squid/templates/secrets.yaml
suggestion	Ensure that secrets are not logged or exposed in any logs or error messages. Consider implementing additional logging filters or masking techniques. [important]
relevant line	kind: Secret

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relevant file	explorer/k8s/helm/general-squid/templates/NOTES.txt
suggestion	Add error handling or checks in the NOTES.txt output commands to ensure that the commands only run successfully when the resources are correctly deployed and available. This can prevent misleading outputs if the deployment has issues. [medium]
relevant line	1. Get the application URL by running these commands:

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[github-actions]

PR Code Suggestions

Category	Suggestions
Maintainability	Improve variable naming for clarity. Consider using a more descriptive variable name instead of $name in the general-squid.fullname template to improve readability and maintainability. explorer/k8s/helm/general-squid/templates/_helpers.tpl [15] -{{- $name := default .Chart.Name .Values.nameOverride }} +{{- $chartName := default .Chart.Name .Values.nameOverride }}
	Ensure consistent formatting in the ConfigMap. Use consistent spacing around colons in the data section for better readability. explorer/k8s/helm/general-squid/templates/configmap.yaml [11] -POSTGRES_HOST : {{ .Values.postgres.postgresHost }} +POSTGRES_HOST: {{ .Values.postgres.postgresHost }}
Bug	Remove inappropriate namespace field from ClusterRoleBinding. Ensure that the namespace field is removed from the ClusterRoleBinding metadata to adhere to Kubernetes RBAC standards, as ClusterRoleBindings are not namespaced. explorer/k8s/helm/general-squid/templates/clusterroles.yaml [7] -namespace: {{ .Values.namespace}} +# namespace: {{ .Values.namespace}} # Removed as ClusterRoleBindings are not namespaced
Enhancement	Add a default case for pathType to enhance compatibility. Add a default case for pathType to ensure compatibility with different Kubernetes versions and configurations. explorer/k8s/helm/general-squid/templates/ingress.yaml [28] -pathType: {{ .pathType | quote }} +pathType: {{ default "ImplementationSpecific" .pathType | quote }}
	Add error handling for autoscaling configuration values. Add error handling for cases where .Values.autoscaling.targetCPUUtilizationPercentage and .Values.autoscaling.targetMemoryUtilizationPercentage might not be set to avoid runtime errors. explorer/k8s/helm/general-squid/templates/hpa.yaml [20] -targetAverageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }} +targetAverageUtilization: {{ required "A valid .Values.autoscaling.targetCPUUtilizationPercentage is required!" .Values.autoscaling.targetCPUUtilizationPercentage }}
	Parameterize the PostgreSQL container port for better flexibility. It is recommended to parameterize the postgres container port to maintain consistency and flexibility, allowing easy updates or configurations changes through values.yaml. explorer/k8s/helm/general-squid/templates/statefulset.yaml [30] -containerPort: 5432 +containerPort: {{ .Values.postgres.postgresPort }}
Best practice	Use specific image tags instead of "latest" to ensure deployment consistency. Consider using a more specific tag than "latest" for the images to ensure consistent deployments and avoid potential issues with unexpected changes when the "latest" image is updated. Using a specific version tag can help maintain stability and predictability in deployments. explorer/k8s/helm/general-squid/templates/statefulset.yaml [93-143] -image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}" -image: "{{ .Values.image_api.repository }}:{{ .Values.image_api.tag | default .Chart.AppVersion }}" +image: "{{ .Values.image.repository }}:1.2.3" # Replace '1.2.3' with the specific version you want to use +image: "{{ .Values.image_api.repository }}:1.2.3" # Replace '1.2.3' with the specific version you want to use
	Add labels to Role and RoleBinding resources for better resource management. For the Role and RoleBinding resources, consider adding labels for better manageability and to align with best practices. Labels can help in identifying and organizing resources, especially in larger systems. explorer/k8s/helm/general-squid/templates/roles.yaml [3-5] metadata: name: pod-reader-role namespace: {{ .Values.namespace | quote }} + labels: + app: general-squid + role: pod-reader
Security	Use secure secret management practices instead of encoding secrets in the template. It's a security best practice to avoid using base64 encoding for secrets directly in templates as it can be easily decoded. Instead, consider using Kubernetes secrets management practices that involve creating secrets outside of the deployment pipeline and referencing them in your deployments. explorer/k8s/helm/general-squid/templates/secrets.yaml [7-9] +# Assume secrets are created separately and securely data: - POSTGRES_PASSWORD: {{ .Values.postgres.postgresPassword | b64enc}} - POSTGRES_USER: {{ .Values.postgres.postgresUser | b64enc}} + POSTGRES_PASSWORD: {{ .Values.postgres.secretNameForPassword }} + POSTGRES_USER: {{ .Values.postgres.secretNameForUser }}
Possible issue	Ensure selector labels match the pod template labels exactly to avoid service disruptions. To avoid potential selector mismatches that can lead to service disruptions, ensure that the selector labels match exactly with the labels specified in the pod template of the deployment or stateful set. explorer/k8s/helm/general-squid/templates/service.yaml [13-15] selector: - name: {{ include "general-squid.fullname" . }}-app app: {{ include "general-squid.fullname" . }}-app

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[DaMandal0rian]

closing as making #304 reusable by all micro-squids