Feature/add dns as helm chart #324
Conversation
WalkthroughThe changes introduce a new Helm chart for the CoreDNS application, encompassing configuration files such as Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant Helm
participant Kubernetes
User->>Helm: Deploy CoreDNS
Helm->>Kubernetes: Install CoreDNS Chart
Kubernetes->>Helm: Acknowledge Installation
Helm->>User: Deployment Successful
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Files ignored due to path filters (1)
packages/apps/coredns/logos/coredns.svgis excluded by!**/*.svg
Files selected for processing (9)
- packages/apps/coredns/.helmignore (1 hunks)
- packages/apps/coredns/Chart.yaml (1 hunks)
- packages/apps/coredns/templates/coredns.yaml (1 hunks)
- packages/apps/coredns/values.schema.json (1 hunks)
- packages/apps/coredns/values.yaml (1 hunks)
- packages/apps/kubernetes/Chart.yaml (1 hunks)
- packages/apps/kubernetes/templates/cluster.yaml (1 hunks)
- packages/apps/kubernetes/values.schema.json (2 hunks)
- packages/apps/kubernetes/values.yaml (1 hunks)
Files skipped from review due to trivial changes (4)
- packages/apps/coredns/.helmignore
- packages/apps/coredns/Chart.yaml
- packages/apps/coredns/values.yaml
- packages/apps/kubernetes/Chart.yaml
Additional context used
yamllint
packages/apps/coredns/templates/coredns.yaml
[error] 4-4: syntax error: expected , but found ''
(syntax)
Additional comments not posted (4)
packages/apps/coredns/values.schema.json (1)
1-15: Well-defined JSON schema for Helm values.The JSON schema is well-structured and follows the standard format. It correctly defines the properties for
forward_paramswith appropriate types, defaults, and examples. This will help ensure that the Helm values are validated effectively when used.packages/apps/kubernetes/values.yaml (1)
6-12: New parameterdisabledDNSAddonadded effectively.The addition of the
disabledDNSAddonparameter is a good enhancement, allowing users to control the state of the CoreDNS addon directly from the values file. The default setting offalseis appropriate, ensuring that CoreDNS is enabled by default, which aligns with typical Kubernetes deployments.packages/apps/kubernetes/values.schema.json (1)
25-29: Well-defined new property for DNS addon control.The addition of the
disabledDNSAddonproperty is well-implemented with a clear type, description, and default value. This change enhances the configurability of the DNS management within the Kubernetes application.packages/apps/kubernetes/templates/cluster.yaml (1)
90-94: Conditional logic for CoreDNS configuration is well-placed.The addition of the conditional block to check the
disabledDNSAddonvalue before including thecoreDNSconfiguration is a smart enhancement. It allows for more flexible deployment scenarios based on user-defined values.Consider verifying this conditional logic through deployment tests to ensure it functions as intended under various configurations.
Verification successful
Conditional logic for CoreDNS configuration is correctly implemented.
The
disabledDNSAddonparameter is well-documented and correctly used in thecluster.yamltemplate to control the inclusion of thecoreDNSconfiguration. However, consider performing manual tests to verify its behavior under different configurations, as there are no automated tests found for this logic.
values.yaml: DefinesdisabledDNSAddonwith a default value offalse.values.schema.json: DescribesdisabledDNSAddonas a boolean parameter.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the conditional logic in the cluster template. # Test: Deploy the template with different `disabledDNSAddon` values and check the resulting configuration. echo "Deploy the template with 'disabledDNSAddon' set to true and false, then verify the 'coreDNS' section presence accordingly."Length of output: 266
Script:
#!/bin/bash # Search for the usage of `disabledDNSAddon` in the repository to understand its context. rg 'disabledDNSAddon' -A 3 # Check for any documentation or test files related to this feature. fd -e md -e yaml -e yml | xargs rg 'disabledDNSAddon'Length of output: 1492
| apiVersion: helm.toolkit.fluxcd.io/v2 | ||
| kind: HelmRelease | ||
| metadata: | ||
| name: {{ .Release.Name }}-system | ||
| spec: | ||
| chart: | ||
| spec: | ||
| chart: cozy-coredns | ||
| reconcileStrategy: Revision | ||
| sourceRef: | ||
| kind: HelmRepository | ||
| name: cozystack-system | ||
| namespace: cozy-system | ||
| version: '{{ .Chart.AppVersion }}' | ||
| interval: 1m0s | ||
| timeout: 5m0s | ||
| values: | ||
| servers: | ||
| - zones: | ||
| - zone: . | ||
| port: 53 | ||
| plugins: | ||
| - name: errors | ||
| - name: health | ||
| configBlock: |- | ||
| lameduck 5s | ||
| - name: ready | ||
| - name: kubernetes | ||
| parameters: cluster.local in-addr.arpa ip6.arpa | ||
| configBlock: |- | ||
| pods insecure | ||
| fallthrough in-addr.arpa ip6.arpa | ||
| ttl 30 | ||
| - name: prometheus | ||
| parameters: 0.0.0.0:9153 | ||
| - name: forward | ||
| parameters: {{ .Values.forward_parametr | default ". /etc/resolv.conf" }} | ||
| - name: cache | ||
| parameters: 30 | ||
| - name: loop | ||
| - name: reload | ||
| - name: loadbalance |
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Syntax error needs correction.
There is a syntax error reported by yamllint at line 4, which could potentially break the Helm deployment. Please ensure that the template is valid YAML. The rest of the template is well-structured and covers the necessary configurations for deploying CoreDNS effectively.
Suggested fix for the syntax error:
- name: {{ .Release.Name }}-system
+ name: "{{ .Release.Name }}-system"Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| apiVersion: helm.toolkit.fluxcd.io/v2 | |
| kind: HelmRelease | |
| metadata: | |
| name: {{ .Release.Name }}-system | |
| spec: | |
| chart: | |
| spec: | |
| chart: cozy-coredns | |
| reconcileStrategy: Revision | |
| sourceRef: | |
| kind: HelmRepository | |
| name: cozystack-system | |
| namespace: cozy-system | |
| version: '{{ .Chart.AppVersion }}' | |
| interval: 1m0s | |
| timeout: 5m0s | |
| values: | |
| servers: | |
| - zones: | |
| - zone: . | |
| port: 53 | |
| plugins: | |
| - name: errors | |
| - name: health | |
| configBlock: |- | |
| lameduck 5s | |
| - name: ready | |
| - name: kubernetes | |
| parameters: cluster.local in-addr.arpa ip6.arpa | |
| configBlock: |- | |
| pods insecure | |
| fallthrough in-addr.arpa ip6.arpa | |
| ttl 30 | |
| - name: prometheus | |
| parameters: 0.0.0.0:9153 | |
| - name: forward | |
| parameters: {{ .Values.forward_parametr | default ". /etc/resolv.conf" }} | |
| - name: cache | |
| parameters: 30 | |
| - name: loop | |
| - name: reload | |
| - name: loadbalance | |
| apiVersion: helm.toolkit.fluxcd.io/v2 | |
| kind: HelmRelease | |
| metadata: | |
| name: "{{ .Release.Name }}-system" | |
| spec: | |
| chart: | |
| spec: | |
| chart: cozy-coredns | |
| reconcileStrategy: Revision | |
| sourceRef: | |
| kind: HelmRepository | |
| name: cozystack-system | |
| namespace: cozy-system | |
| version: '{{ .Chart.AppVersion }}' | |
| interval: 1m0s | |
| timeout: 5m0s | |
| values: | |
| servers: | |
| - zones: | |
| - zone: . | |
| port: 53 | |
| plugins: | |
| - name: errors | |
| - name: health | |
| configBlock: |- | |
| lameduck 5s | |
| - name: ready | |
| - name: kubernetes | |
| parameters: cluster.local in-addr.arpa ip6.arpa | |
| configBlock: |- | |
| pods insecure | |
| fallthrough in-addr.arpa ip6.arpa | |
| ttl 30 | |
| - name: prometheus | |
| parameters: 0.0.0.0:9153 | |
| - name: forward | |
| parameters: {{ .Values.forward_parametr | default ". /etc/resolv.conf" }} | |
| - name: cache | |
| parameters: 30 | |
| - name: loop | |
| - name: reload | |
| - name: loadbalance |
Tools
yamllint
[error] 4-4: syntax error: expected , but found ''
(syntax)
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Actionable comments posted: 0
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Files selected for processing (1)
- packages/apps/coredns/templates/coredns.yaml (1 hunks)
Files skipped from review as they are similar to previous changes (1)
- packages/apps/coredns/templates/coredns.yaml
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Actionable comments posted: 1
Outside diff range, codebase verification and nitpick comments (1)
packages/system/coredns/charts/coredns/README.md (1)
12-19: Review detailed deployment scenarios.The documentation outlines various deployment scenarios for CoreDNS, including as a cluster DNS service, an external DNS service, and for Kubernetes federation. This section is informative and covers a broad range of use cases.
- Typographical Issue: There is a repeated word "using" in line 17. This should be corrected to improve readability.
- Spelling Issue: The term "sub case" in line 18 should be "subcase" as it is normally spelled as one word.
Consider correcting the typographical and spelling issues for improved clarity:
- using using + using- sub case + subcaseTools
LanguageTool
[duplication] ~17-~17: Possible typo: you repeated a word
Context: ...e can be exposed outside the cluster by using using either the NodePort or LoadBalancer typ...(ENGLISH_WORD_REPEAT_RULE)
[misspelling] ~18-~18: This word is normally spelled as one.
Context: ...er for kubernetes federation. This is a sub case of 'external dns service' which uses et...(EN_COMPOUNDS_SUB_CASE)
Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Files selected for processing (26)
- packages/apps/kubernetes/Chart.yaml (1 hunks)
- packages/system/coredns/Chart.yaml (1 hunks)
- packages/system/coredns/Makefile (1 hunks)
- packages/system/coredns/charts/coredns/.helmignore (1 hunks)
- packages/system/coredns/charts/coredns/Chart.yaml (1 hunks)
- packages/system/coredns/charts/coredns/README.md (1 hunks)
- packages/system/coredns/charts/coredns/templates/NOTES.txt (1 hunks)
- packages/system/coredns/charts/coredns/templates/_helpers.tpl (1 hunks)
- packages/system/coredns/charts/coredns/templates/clusterrole-autoscaler.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/clusterrole.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/clusterrolebinding-autoscaler.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/clusterrolebinding.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/configmap-autoscaler.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/configmap.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/deployment-autoscaler.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/deployment.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/hpa.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/poddisruptionbudget.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/podsecuritypolicy.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/service-metrics.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/service.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/serviceaccount-autoscaler.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/serviceaccount.yaml (1 hunks)
- packages/system/coredns/charts/coredns/templates/servicemonitor.yaml (1 hunks)
- packages/system/coredns/charts/coredns/values.yaml (1 hunks)
- packages/system/coredns/values.yaml (1 hunks)
Files skipped from review due to trivial changes (3)
- packages/system/coredns/Chart.yaml
- packages/system/coredns/charts/coredns/.helmignore
- packages/system/coredns/values.yaml
Additional context used
yamllint
packages/system/coredns/charts/coredns/templates/clusterrolebinding.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/serviceaccount-autoscaler.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/clusterrolebinding-autoscaler.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/clusterrole.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/serviceaccount.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/poddisruptionbudget.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/clusterrole-autoscaler.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/hpa.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/configmap.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/podsecuritypolicy.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/configmap-autoscaler.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
[warning] 9-9: wrong indentation: expected 2 but found 4
(indentation)
[warning] 10-10: wrong indentation: expected 2 but found 4
(indentation)
[warning] 11-11: wrong indentation: expected 2 but found 4
(indentation)
packages/system/coredns/charts/coredns/templates/service-metrics.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/servicemonitor.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/service.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/deployment-autoscaler.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/deployment.yaml
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
LanguageTool
packages/system/coredns/charts/coredns/templates/NOTES.txt
[uncategorized] ~7-~7: Loose punctuation mark.
Context: ...rvices {{ template "coredns.fullname" . }}) export NODE_IP=$(kubectl get nodes ...(UNLIKELY_OPENING_PUNCTUATION)
[uncategorized] ~12-~12: Loose punctuation mark.
Context: ...svc -w {{ template "coredns.fullname" . }}' export SERVICE_IP=$(kubectl get ...(UNLIKELY_OPENING_PUNCTUATION)
[uncategorized] ~17-~17: Loose punctuation mark.
Context: ...} "{{ template "coredns.fullname" . }}.{{ .Release.Namespace }}.svc.cluster.l...(UNLIKELY_OPENING_PUNCTUATION)
packages/system/coredns/charts/coredns/README.md
[duplication] ~17-~17: Possible typo: you repeated a word
Context: ...e can be exposed outside the cluster by using using either the NodePort or LoadBalancer typ...(ENGLISH_WORD_REPEAT_RULE)
[misspelling] ~18-~18: This word is normally spelled as one.
Context: ...er for kubernetes federation. This is a sub case of 'external dns service' which uses et...(EN_COMPOUNDS_SUB_CASE)
[typographical] ~136-~136: After the expression ‘for example’ a comma is usually used.
Context: ...ns to add to autoscaler config map. For example to stop CI renaming them ...(COMMA_FOR_EXAMPLE)
[uncategorized] ~145-~145: A comma may be missing after the conjunctive/linking adverb ‘Otherwise’.
Context: ...oyment ifdeployment.enabledis true. Otherwise the name of an existing deployment for ...(SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA)
Markdownlint
packages/system/coredns/charts/coredns/README.md
8-8: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
9-9: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
29-29: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
30-30: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
42-42: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
163-163: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
5-5: Punctuation: ';'
Trailing punctuation in heading(MD026, no-trailing-punctuation)
202-202: null
Bare URL used(MD034, no-bare-urls)
204-204: null
Fenced code blocks should have a language specified(MD040, fenced-code-language)
223-223: null
Fenced code blocks should have a language specified(MD040, fenced-code-language)
233-233: null
Fenced code blocks should have a language specified(MD040, fenced-code-language)
248-248: null
Fenced code blocks should have a language specified(MD040, fenced-code-language)
106-106: Expected: 3; Actual: 2; Too few cells, row will be missing data
Table column count(MD056, table-column-count)
Additional comments not posted (39)
packages/system/coredns/Makefile (2)
1-2: Environment Variables Declared CorrectlyThe environment variables
NAMEandNAMESPACEare declared correctly and follow good practices for maintainability and reusability.
7-11: MakefileupdateTarget Well-DefinedThe
updatetarget in the Makefile is well-defined and uses appropriate Helm commands to manage the CoreDNS chart. The sequence of commands ensures that the charts directory is cleaned before pulling the new chart, which is a good practice.packages/system/coredns/charts/coredns/templates/clusterrolebinding.yaml (1)
1-15: ClusterRoleBinding Template Correctly DefinedThe Kubernetes ClusterRoleBinding template is correctly defined using Helm templating syntax. It conditionally creates a ClusterRoleBinding if both deployment and RBAC are enabled, which is a good practice for conditional resource creation in Kubernetes.
The syntax error flagged by yamllint appears to be a false positive related to the Helm templating syntax, which is correctly used here.
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/Chart.yaml (1)
1-24: Helm Chart Metadata Appropriately DefinedThe
Chart.yamlfile for the CoreDNS Helm chart is appropriately defined with comprehensive metadata. It includes versioning, descriptions, maintainers, and other relevant information, which are crucial for managing the Helm chart effectively. The use of annotations to document changes is a good practice for traceability and version management.packages/system/coredns/charts/coredns/templates/serviceaccount-autoscaler.yaml (1)
1-22: Review of Helm Template Syntax and Kubernetes Resource DefinitionsThe Helm template for creating a ServiceAccount is well-structured and follows best practices for conditional resource creation in Helm charts. The use of template functions like
coredns.fullnameand dynamic settings forlabelsandannotationsis correctly implemented.
- Syntax and Logic: The Helm templating syntax, including the use of
ifconditions andwithblocks, is correctly used to make the creation of resources configurable based on values provided invalues.yaml.- Kubernetes Resource Definitions: The Kubernetes resource definitions for
ServiceAccountandimagePullSecretsare correctly structured.- Static Analysis Tool Error: The reported syntax error by yamllint is a false positive, typical when linting tools encounter Helm templating syntax. This can be safely ignored in this context.
Overall, the file meets the requirements for introducing a DNS feature as a Helm chart, specifically for managing a service account with autoscaling capabilities.
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/clusterrolebinding-autoscaler.yaml (1)
1-23: Review of ClusterRoleBinding Definition and Helm TemplatingThe Helm template for the ClusterRoleBinding associated with the autoscaler component of CoreDNS is correctly structured. The file uses Helm templating effectively to manage Kubernetes resource definitions dynamically based on configuration values.
- Kubernetes Resource Definitions: The
ClusterRoleBindingis correctly defined with appropriateroleRefandsubjectsto link the service account to the necessary permissions.- Helm Templating: The use of dynamic values and conditional blocks ensures that the resource is only created when necessary, adhering to the configurations specified in
values.yaml.- Static Analysis Tool Error: The syntax error reported by yamllint is a false positive due to its inability to correctly parse Helm templating syntax. This error can be ignored.
This file is well-prepared to support the new DNS feature as a Helm chart by managing permissions for the autoscaler component effectively.
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/clusterrole.yaml (1)
1-36: Review of ClusterRole Definition and Helm TemplatingThe Helm template for the ClusterRole necessary for the CoreDNS deployment is well-constructed. It correctly specifies the necessary permissions for the DNS service to function within a Kubernetes environment.
- RBAC Permissions: The permissions for
endpoints,services,pods,namespaces, andendpointslicesare appropriately defined. The use ofapiGroupsandverbsaligns with Kubernetes RBAC best practices.- Conditional Security Features: The inclusion of permissions for
podsecuritypoliciesbased on the Helm valuerbac.pspEnableis a prudent approach to managing optional security features.- Helm Templating: The dynamic creation of the ClusterRole based on deployment settings ensures that resources are managed according to the specified configurations.
- Static Analysis Tool Error: The syntax error reported by yamllint is a false positive, typical of its handling of Helm templating syntax. This error can be disregarded.
This file effectively supports the new DNS feature as a Helm chart by defining necessary permissions for the CoreDNS deployment.
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/serviceaccount.yaml (1)
1-23: Review of the ServiceAccount Helm TemplateThe Helm template for creating a ServiceAccount is well-structured and follows best practices for conditional rendering based on values provided in
values.yaml. The use of{{-to control whitespace is correctly applied, and the conditions for creating annotations and image pull secrets are clear and logical.However, ensure that the
serviceAccount.createanddeployment.enabledflags are well-documented in thevalues.yamlto avoid confusion about when the ServiceAccount will be created.Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/poddisruptionbudget.yaml (1)
1-26: Review of the PodDisruptionBudget Helm TemplateThe Helm template for creating a PodDisruptionBudget is well-structured and follows best practices for conditional rendering based on values provided in
values.yaml. The use of{{-to control whitespace is correctly applied, and the conditions for creating custom labels and annotations are clear and logical.However, ensure that the
podDisruptionBudgetanddeployment.enabledflags are well-documented in thevalues.yamlto avoid confusion about when the PodDisruptionBudget will be created.Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/clusterrole-autoscaler.yaml (1)
1-30: Review of the ClusterRole Autoscaler Helm TemplateThe Helm template for creating a ClusterRole for autoscaling is well-structured and follows best practices for conditional rendering based on values provided in
values.yaml. The use of{{-to control whitespace is correctly applied, and the conditions for creating custom labels and annotations are clear and logical.The comment regarding the removal of the configmaps rule once a specific issue is resolved is a good practice for future maintainability. Ensure that this issue is tracked in your project's issue tracking system to not forget about this temporary workaround.
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/hpa.yaml (1)
1-33: Review of the new HPA configuration file for CoreDNS Helm chart.This file introduces a new Horizontal Pod Autoscaler (HPA) configuration for CoreDNS, using Helm templating to dynamically generate the appropriate settings based on deployment conditions. The file is well-structured and follows best practices for Helm chart templates, including:
- Conditional checks for enabling HPA and ensuring no conflict with another autoscaler.
- Compatibility checks for Kubernetes API versions to use the correct HPA API.
- Dynamic labeling and annotations using Helm functions and pipelines.
The static analysis tool flagged a syntax error at the beginning of the file, which is a common false positive when dealing with Helm templating syntax in YAML files. This is not an actual syntax error in the context of Helm charts.
Overall, the file is correctly implemented and adheres to best practices for Kubernetes Helm charts.
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/apps/kubernetes/Chart.yaml (1)
19-19: Version number update in Helm chart metadata.The version number of the Helm chart has been updated from
0.9.0to0.10.0. This change is consistent with Semantic Versioning practices, indicating enhancements or significant changes to the chart. The file is well-documented, and the version update is appropriately reflected.This change is approved as it follows best practices for version management in Helm charts.
packages/system/coredns/charts/coredns/templates/configmap.yaml (1)
1-37: Review of the new ConfigMap configuration file for CoreDNS Helm chart.This file introduces a new ConfigMap configuration for CoreDNS, using Helm templating to dynamically generate the appropriate settings based on deployment conditions. The file is well-structured and follows best practices for Helm chart templates, including:
- Conditional checks for enabling or skipping the ConfigMap based on deployment settings.
- Dynamic labeling and annotations using Helm functions and pipelines.
- Flexible configuration for CoreDNS through templated values, allowing customization of the Corefile and other settings.
The static analysis tool flagged a syntax error at the beginning of the file, which is a common false positive when dealing with Helm templating syntax in YAML files. This is not an actual syntax error in the context of Helm charts.
Overall, the file is correctly implemented and adheres to best practices for Kubernetes Helm charts.
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/podsecuritypolicy.yaml (1)
1-47: Approve the PodSecurityPolicy configuration.The Helm templating is correctly used to conditionally apply configurations and check for API versions, ensuring compatibility across different Kubernetes versions. The security settings are aligned with best practices for securing pods.
Regarding the static analysis error on line 1, it is a common issue with Helm templates and can be safely ignored as a false positive.
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/NOTES.txt (1)
1-30: Approve the NOTES.txt content.The Helm templating is correctly used to provide user-friendly instructions for accessing CoreDNS based on the service type. The content is clear and effectively communicates how to access the service under different configurations.
Regarding the static analysis punctuation issues, they are common with Helm templates and can be safely ignored as false positives.
Tools
LanguageTool
[uncategorized] ~7-~7: Loose punctuation mark.
Context: ...rvices {{ template "coredns.fullname" . }}) export NODE_IP=$(kubectl get nodes ...(UNLIKELY_OPENING_PUNCTUATION)
[uncategorized] ~12-~12: Loose punctuation mark.
Context: ...svc -w {{ template "coredns.fullname" . }}' export SERVICE_IP=$(kubectl get ...(UNLIKELY_OPENING_PUNCTUATION)
[uncategorized] ~17-~17: Loose punctuation mark.
Context: ...} "{{ template "coredns.fullname" . }}.{{ .Release.Namespace }}.svc.cluster.l...(UNLIKELY_OPENING_PUNCTUATION)
packages/system/coredns/charts/coredns/templates/service-metrics.yaml (1)
1-39: Template and Kubernetes resource definitions look correct.The Helm template uses conditional logic to configure the Kubernetes Service resource based on values provided in the Helm chart. The use of template functions and conditional blocks for labels and annotations is correctly implemented.
Regarding the syntax error flagged by yamllint at line 1, this is a common false positive when linting Helm templates, as the Helm syntax
{{-is not recognized by standard YAML linters.Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/servicemonitor.yaml (1)
1-40: Template and Kubernetes resource definitions look correct.The Helm template uses conditional logic to configure the ServiceMonitor resource based on values provided in the Helm chart. The use of template functions and conditional blocks for labels, annotations, and selectors is correctly implemented.
Regarding the syntax error flagged by yamllint at line 1, this is a common false positive when linting Helm templates, as the Helm syntax
{{-is not recognized by standard YAML linters.Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/service.yaml (1)
1-55: Template and Kubernetes resource definitions look correct.The Helm template uses conditional logic to configure the Kubernetes Service resource based on values provided in the Helm chart. The use of template functions and conditional blocks for labels, annotations, and selectors is correctly implemented.
Regarding the syntax error flagged by yamllint at line 1, this is a common false positive when linting Helm templates, as the Helm syntax
{{-is not recognized by standard YAML linters.Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
packages/system/coredns/charts/coredns/templates/deployment-autoscaler.yaml (3)
1-8: Conditional Logic and Metadata Configuration: ApprovedThe conditional logic correctly enables the autoscaler only when HPA is not enabled, preventing conflicts between autoscaling mechanisms. The dynamic naming and namespace assignment are correctly implemented using Helm templating functions.
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
8-15: Label and Annotation Handling: ApprovedThe dynamic generation of labels and annotations using Helm templating functions like
nindentandtoYamlis correctly implemented. This approach provides flexibility and maintains readability and maintainability of the Helm chart.
45-97: Pod Specification: Comprehensive and FlexibleThe pod specification is well-structured, covering service accounts, priority classes, affinity, tolerations, node selectors, and image pull secrets. Each feature is conditionally applied, enhancing the deployment's adaptability to different environments.
Suggestion: Verify Image Repository and Tag
Ensure that the image repository and tag specified in.Values.autoscaler.image.repositoryand.Values.autoscaler.image.tagare valid and accessible.Run the following script to verify the image repository and tag:
packages/system/coredns/charts/coredns/templates/deployment.yaml (3)
1-9: Conditional Logic and Metadata Configuration: ApprovedThe conditional logic correctly enables the deployment based on the
.Values.deployment.enabledconfiguration. The metadata configuration, including dynamic naming and version labeling, is correctly implemented using Helm templating functions.Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
8-41: Label, Annotation, and Selector Handling: ApprovedThe dynamic generation of labels, annotations, and selectors using Helm templating functions like
nindentandtoYamlis correctly implemented. This approach provides flexibility and maintains readability and maintainability of the Helm chart.
61-160: Pod and Container Specification: Comprehensive and FlexibleThe pod and container specification is well-structured, covering security contexts, termination policies, service accounts, priority classes, DNS policies, affinity, tolerations, node selectors, image pull secrets, and container settings. Each feature is conditionally applied, enhancing the deployment's adaptability to different environments.
Suggestion: Verify Image Repository and Tag
Ensure that the image repository and tag specified in.Values.image.repositoryand.Values.image.tagare valid and accessible.Run the following script to verify the image repository and tag:
packages/system/coredns/charts/coredns/templates/_helpers.tpl (2)
1-39: Helper Definitions for Names and Labels: ApprovedThe helper definitions for names and labels are correctly implemented using Helm templating functions like
default,trunc, andtrimSuffix. This approach ensures compliance with Kubernetes naming specifications and provides flexibility in configuration.
66-215: Port Configuration Helpers: Robust and Well-DesignedThe port configuration helpers are implemented using complex Helm templating logic, which dynamically generates accurate port settings based on server definitions and supported protocols. This implementation ensures that ports are correctly configured for both TCP and UDP, meeting the deployment's specific requirements.
packages/system/coredns/charts/coredns/values.yaml (9)
5-17: Review default image configuration.The default image configuration is well-defined with placeholders for the image tag and options for image pull secrets. This setup follows best practices by allowing flexibility in image source and versioning while ensuring the image is pulled only if not present.
- Security Consideration: The use of
pullSecretsis optional but crucial for private registries. Ensure secrets are created securely in the Kubernetes environment.- Best Practice: It's recommended to specify a default tag aligned with a stable version rather than leaving it empty to ensure predictable deployments.
18-27: Validate resource limits and requests.The resource limits and requests are set conservatively to
100mfor CPU and128Mifor memory both in limits and requests. This configuration is suitable for ensuring that CoreDNS does not consume excessive resources on a node, which is particularly important in multi-tenant environments or clusters with limited resources.
- Performance Consideration: Adjust these values based on the cluster size and load expectations. Monitoring actual usage and adjusting these values can help in optimizing resource utilization.
- Best Practice: It's a good practice to define both limits and requests to avoid resource starvation and ensure QoS for the pod.
28-31: Check rolling update strategy.The rolling update configuration with
maxUnavailable: 1andmaxSurge: 25%is a standard practice for ensuring high availability during updates. This setup helps in minimizing downtime and ensuring that at least a portion of the CoreDNS service remains available during the rolling update.
- High Availability: This configuration is crucial for DNS services which are critical for cluster operation. Ensuring that updates do not take down all instances simultaneously is vital.
- Best Practice: Validate these settings in a staging environment to ensure they meet the uptime requirements of your specific Kubernetes cluster setup.
32-33: Set appropriate termination grace period.The
terminationGracePeriodSecondsis set to 30 seconds, which is generally sufficient for DNS servers like CoreDNS to gracefully shutdown. This setting helps in handling ongoing DNS queries and ensures that the pod shutdown does not disrupt service.
- Graceful Shutdown: It's important for DNS services to handle ongoing requests before shutdown to maintain reliability and reduce DNS lookup failures.
- Best Practice: Depending on the load, this value might need adjustment. Observing the shutdown behavior under load can provide insights for potential adjustments.
37-51: Review Prometheus integration settings.The configuration for Prometheus integration is disabled by default (
enabled: false), which is a safe default to prevent unintended exposure of metrics. However, for clusters where monitoring is crucial, enabling this and configuring proper annotations and selectors is necessary.
- Monitoring and Observability: Enabling Prometheus metrics can significantly aid in monitoring the health and performance of CoreDNS.
- Security Consideration: Ensure that access to the metrics endpoints is secured and restricted to prevent unauthorized access.
67-81: Evaluate RBAC and security settings.RBAC is enabled by default (
create: true), which is essential for enforcing least privilege access controls in Kubernetes. The option to enable PodSecurityPolicy (pspEnable: false) is provided but disabled by default, which might need reconsideration in highly regulated environments.
- Security Best Practices: Enabling PodSecurityPolicy can provide an additional layer of security by restricting pod capabilities based on security policies.
- Configuration Flexibility: The chart provides flexibility to configure these settings based on the security posture and requirements of the deployment environment.
83-98: Inspect security context and capabilities.The security context is configured to add the
NET_BIND_SERVICEcapability, allowing CoreDNS to bind to well-known ports. This is necessary for DNS services but should be carefully managed to avoid granting unnecessary capabilities.
- Security Implication: Minimizing the capabilities granted to containers enhances security by reducing the potential attack surface.
- Best Practice: Ensure that no additional unnecessary capabilities are granted, and review the security context settings regularly as part of a security audit.
102-133: Review CoreDNS server and plugin configurations.The server configuration includes essential plugins like
health,ready,kubernetes, andprometheus, which are crucial for the operation and monitoring of the DNS service. The configuration blocks are well-defined, providing necessary settings for each plugin.
- Configuration Completeness: The inclusion of lameduck duration in the health check and TTL settings in the Kubernetes plugin are good practices that enhance the reliability and performance of the DNS service.
- Best Practice: Regularly review and update the plugin configurations to align with CoreDNS updates and security best practices.
290-314: Assess Horizontal Pod Autoscaler (HPA) and cluster-proportional autoscaler configurations.The HPA is disabled by default, which is a conservative choice allowing manual scaling. The cluster-proportional autoscaler is also disabled but configured with detailed settings for scaling based on cluster size, which can be very effective in large deployments.
- Scalability: These autoscalers can help in scaling the DNS service based on actual load and cluster changes, which is crucial for maintaining performance and availability.
- Configuration Advice: Consider enabling the autoscaler in environments with fluctuating load patterns to ensure DNS service scalability.
packages/system/coredns/charts/coredns/README.md (4)
1-10: Validate introductory and TL;DR sections.The introduction and TL;DR sections provide a clear overview of CoreDNS and its deployment using Helm. The commands are correctly formatted and provide a quick start option for users.
- Documentation Clarity: The introduction succinctly explains what CoreDNS is and how it can be deployed, which is useful for new users.
- Command Accuracy: The Helm commands are correctly provided, ensuring users can easily add the repository and install CoreDNS.
Tools
Markdownlint
8-8: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
9-9: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
5-5: Punctuation: ';'
Trailing punctuation in heading(MD026, no-trailing-punctuation)
20-46: Ensure prerequisites and uninstallation instructions are clear.The prerequisites clearly specify the minimum Kubernetes version required, which is crucial for compatibility. The uninstallation instructions are straightforward, providing commands to remove the deployment.
- Documentation Completeness: Including prerequisites helps users determine if their environment is suitable for the chart.
- Command Accuracy: The uninstallation command is correctly formatted and explained, ensuring users can cleanly remove CoreDNS if needed.
Tools
Markdownlint
29-29: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
30-30: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
42-42: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
47-123: Examine configuration table and autoscaling details.The configuration table is comprehensive, detailing various parameters that can be set during deployment. The autoscaling section provides valuable information on how to enable and configure autoscalers for CoreDNS.
- Documentation Accuracy: The table matches the settings described in the
values.yamlfile, ensuring consistency across documents.- Configuration Explanation: The autoscaling details are well-explained, providing context on how scaling behaves based on cluster metrics.
Tools
Markdownlint
106-106: Expected: 3; Actual: 2; Too few cells, row will be missing data
Table column count(MD056, table-column-count)
124-253: Check adoption of existing resources and script examples.The section on adopting existing CoreDNS resources provides detailed steps and scripts for integrating existing deployments with Helm. The scripts are well-documented and include necessary warnings and tips.
- Script Accuracy: The bash scripts are correctly formatted and include robust error handling with
set -euo pipefail.- Documentation Best Practices: The inclusion of detailed steps and scripts enhances the usability of the documentation for advanced deployment scenarios.
Tools
LanguageTool
[typographical] ~136-~136: After the expression ‘for example’ a comma is usually used.
Context: ...ns to add to autoscaler config map. For example to stop CI renaming them ...(COMMA_FOR_EXAMPLE)
[uncategorized] ~145-~145: A comma may be missing after the conjunctive/linking adverb ‘Otherwise’.
Context: ...oyment ifdeployment.enabledis true. Otherwise the name of an existing deployment for ...(SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA)
Markdownlint
163-163: null
Dollar signs used before commands without showing output(MD014, commands-show-output)
202-202: null
Bare URL used(MD034, no-bare-urls)
204-204: null
Fenced code blocks should have a language specified(MD040, fenced-code-language)
223-223: null
Fenced code blocks should have a language specified(MD040, fenced-code-language)
233-233: null
Fenced code blocks should have a language specified(MD040, fenced-code-language)
248-248: null
Fenced code blocks should have a language specified(MD040, fenced-code-language)
| {{- if .Values.autoscaler.enabled }} | ||
| --- | ||
| kind: ConfigMap | ||
| apiVersion: v1 | ||
| metadata: | ||
| name: {{ template "coredns.fullname" . }}-autoscaler | ||
| namespace: {{ .Release.Namespace }} | ||
| labels: {{- include "coredns.labels.autoscaler" . | nindent 4 }} | ||
| {{- if .Values.customLabels }} | ||
| {{- toYaml .Values.customLabels | nindent 4 }} | ||
| {{- end }} | ||
| {{- if or .Values.autoscaler.configmap.annotations .Values.customAnnotations }} | ||
| annotations: | ||
| {{- if .Values.customAnnotations }} | ||
| {{- toYaml .Values.customAnnotations | nindent 4 }} | ||
| {{- end }} | ||
| {{- if .Values.autoscaler.configmap.annotations -}} | ||
| {{ toYaml .Values.autoscaler.configmap.annotations | nindent 4 }} | ||
| {{- end }} | ||
| {{- end }} | ||
| data: | ||
| # When cluster is using large nodes(with more cores), "coresPerReplica" should dominate. | ||
| # If using small nodes, "nodesPerReplica" should dominate. | ||
| linear: |- | ||
| { | ||
| "coresPerReplica": {{ .Values.autoscaler.coresPerReplica | float64 }}, | ||
| "nodesPerReplica": {{ .Values.autoscaler.nodesPerReplica | float64 }}, | ||
| "preventSinglePointFailure": {{ .Values.autoscaler.preventSinglePointFailure }}, | ||
| "min": {{ .Values.autoscaler.min | int }}, | ||
| "max": {{ .Values.autoscaler.max | int }}, | ||
| "includeUnschedulableNodes": {{ .Values.autoscaler.includeUnschedulableNodes }} | ||
| } | ||
| {{- end }} |
There was a problem hiding this comment.
Correct indentation issues and approve the ConfigMap configuration.
The Helm templating is correctly used to conditionally apply configurations based on autoscaler settings. However, there are several indentation issues that need to be corrected to maintain YAML file readability and prevent potential errors:
- Lines 9, 10, and 11 should have an indentation of 2 spaces instead of 4.
Regarding the static analysis error on line 1, it is a common issue with Helm templates and can be safely ignored as a false positive.
Apply this diff to correct the indentation issues:
- {{- toYaml .Values.customLabels | nindent 4 }}
+ {{- toYaml .Values.customLabels | nindent 2 }}
- {{- toYaml .Values.customAnnotations | nindent 4 }}
+ {{- toYaml .Values.customAnnotations | nindent 2 }}
- {{ toYaml .Values.autoscaler.configmap.annotations | nindent 4 }}
+ {{ toYaml .Values.autoscaler.configmap.annotations | nindent 2 }}Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| {{- if .Values.autoscaler.enabled }} | |
| --- | |
| kind: ConfigMap | |
| apiVersion: v1 | |
| metadata: | |
| name: {{ template "coredns.fullname" . }}-autoscaler | |
| namespace: {{ .Release.Namespace }} | |
| labels: {{- include "coredns.labels.autoscaler" . | nindent 4 }} | |
| {{- if .Values.customLabels }} | |
| {{- toYaml .Values.customLabels | nindent 4 }} | |
| {{- end }} | |
| {{- if or .Values.autoscaler.configmap.annotations .Values.customAnnotations }} | |
| annotations: | |
| {{- if .Values.customAnnotations }} | |
| {{- toYaml .Values.customAnnotations | nindent 4 }} | |
| {{- end }} | |
| {{- if .Values.autoscaler.configmap.annotations -}} | |
| {{ toYaml .Values.autoscaler.configmap.annotations | nindent 4 }} | |
| {{- end }} | |
| {{- end }} | |
| data: | |
| # When cluster is using large nodes(with more cores), "coresPerReplica" should dominate. | |
| # If using small nodes, "nodesPerReplica" should dominate. | |
| linear: |- | |
| { | |
| "coresPerReplica": {{ .Values.autoscaler.coresPerReplica | float64 }}, | |
| "nodesPerReplica": {{ .Values.autoscaler.nodesPerReplica | float64 }}, | |
| "preventSinglePointFailure": {{ .Values.autoscaler.preventSinglePointFailure }}, | |
| "min": {{ .Values.autoscaler.min | int }}, | |
| "max": {{ .Values.autoscaler.max | int }}, | |
| "includeUnschedulableNodes": {{ .Values.autoscaler.includeUnschedulableNodes }} | |
| } | |
| {{- end }} | |
| {{- if .Values.autoscaler.enabled }} | |
| --- | |
| kind: ConfigMap | |
| apiVersion: v1 | |
| metadata: | |
| name: {{ template "coredns.fullname" . }}-autoscaler | |
| namespace: {{ .Release.Namespace }} | |
| labels: {{- include "coredns.labels.autoscaler" . | nindent 4 }} | |
| {{- if .Values.customLabels }} | |
| {{- toYaml .Values.customLabels | nindent 2 }} | |
| {{- end }} | |
| {{- if or .Values.autoscaler.configmap.annotations .Values.customAnnotations }} | |
| annotations: | |
| {{- if .Values.customAnnotations }} | |
| {{- toYaml .Values.customAnnotations | nindent 2 }} | |
| {{- end }} | |
| {{- if .Values.autoscaler.configmap.annotations -}} | |
| {{ toYaml .Values.autoscaler.configmap.annotations | nindent 2 }} | |
| {{- end }} | |
| {{- end }} | |
| data: | |
| # When cluster is using large nodes(with more cores), "coresPerReplica" should dominate. | |
| # If using small nodes, "nodesPerReplica" should dominate. | |
| linear: |- | |
| { | |
| "coresPerReplica": {{ .Values.autoscaler.coresPerReplica | float64 }}, | |
| "nodesPerReplica": {{ .Values.autoscaler.nodesPerReplica | float64 }}, | |
| "preventSinglePointFailure": {{ .Values.autoscaler.preventSinglePointFailure }}, | |
| "min": {{ .Values.autoscaler.min | int }}, | |
| "max": {{ .Values.autoscaler.max | int }}, | |
| "includeUnschedulableNodes": {{ .Values.autoscaler.includeUnschedulableNodes }} | |
| } | |
| {{- end }} |
Tools
yamllint
[error] 1-1: syntax error: expected the node content, but found '-'
(syntax)
[warning] 9-9: wrong indentation: expected 2 but found 4
(indentation)
[warning] 10-10: wrong indentation: expected 2 but found 4
(indentation)
[warning] 11-11: wrong indentation: expected 2 but found 4
(indentation)
| ## | ||
| host: "" | ||
| controlPlane: | ||
| replicas: 2 | ||
| storageClass: replicated | ||
| disabledDNSAddon: false |
There was a problem hiding this comment.
Can we disable it by default (don't provide such option for the user) and just using helm chart for coredns every time?
| {{- if not .Values.disabledDNSAddon }} | ||
| coreDNS: | ||
| dnsServiceIPs: | ||
| - 10.95.0.10 | ||
| {{- end }} |
There was a problem hiding this comment.
Will it remove existing cordns deployment if we switch disabledDNSAddon from false to true?
Summary by CodeRabbit
New Features
.helmignorefile to streamline Helm packaging by excluding unnecessary files.Chart.yamlfor CoreDNS, providing essential metadata for deployment in Kubernetes.HelmReleaseconfiguration for managing CoreDNS deployment.forward_paramsto allow custom DNS server settings in CoreDNS.disabledDNSAddonparameter to control the CoreDNS addon state in Kubernetes.values.yamlfile for extensive customization of CoreDNS deployment.Bug Fixes
0.9.0to0.10.0to reflect recent improvements.Chores