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feat(common)!: security context to allow CIS compliance #5

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2 changes: 1 addition & 1 deletion charts/common/Chart.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -7,4 +7,4 @@ maintainers:
- email: alex@kharkevich.org
name: Alexander Kharkevich
name: common
version: 2.3.0
version: 2.4.0
1 change: 1 addition & 0 deletions charts/common/templates/_container.yaml
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Expand Up @@ -11,6 +11,7 @@
name: app
image: "{{ default "ghcr.io/technicaldomain" .Values.image.registry }}/{{ .Values.image.name }}:{{ .Values.image.tag | default (include "common.chart.appVersion" .) }}"
imagePullPolicy: {{ default "IfNotPresent" .Values.image.pullPolicy }}
{{ include "common.security.containerContext" . -}}
{{- with .Values.command }}
command:
{{- toYaml . | nindent 2 }}
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34 changes: 34 additions & 0 deletions charts/common/templates/_security_context.yaml
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Expand Up @@ -9,4 +9,38 @@ securityContext:
runAsGroup: {{ $runAsGroup }}
fsGroup: {{ $fsGroup }}
runAsNonRoot: {{ $runAsNonRoot }}
{{- with $context.seccompProfile }}
seccompProfile:
{{- toYaml . | nindent 4 }}
{{- end }}
{{- end -}}

{{- /*
Container-level security context - rendered at containers[*].securityContext.
Rendered only when `.Values.containerSecurityContext` is set. Each field falls
back: container value -> pod-level value -> secure default.
*/ -}}
{{- define "common.security.containerContext" -}}
{{- $pod := default (dict) .Values.securityContext -}}
{{- $ctr := default (dict) .Values.containerSecurityContext -}}
{{- if $ctr -}}
{{- $runAsNonRoot := ternary $ctr.runAsNonRoot (ternary $pod.runAsNonRoot true (hasKey $pod "runAsNonRoot")) (hasKey $ctr "runAsNonRoot") -}}
{{- $runAsUser := ternary $ctr.runAsUser (ternary $pod.runAsUser 1001 (hasKey $pod "runAsUser")) (hasKey $ctr "runAsUser") -}}
{{- $allowPrivEsc := ternary $ctr.allowPrivilegeEscalation false (hasKey $ctr "allowPrivilegeEscalation") -}}
{{- $readOnlyRoot := ternary $ctr.readOnlyRootFilesystem true (hasKey $ctr "readOnlyRootFilesystem") -}}
{{- $seccomp := ternary $ctr.seccompProfile (ternary $pod.seccompProfile nil (hasKey $pod "seccompProfile")) (hasKey $ctr "seccompProfile") -}}
securityContext:
runAsNonRoot: {{ $runAsNonRoot }}
runAsUser: {{ $runAsUser }}
allowPrivilegeEscalation: {{ $allowPrivEsc }}
readOnlyRootFilesystem: {{ $readOnlyRoot }}
{{- if hasKey $ctr "capabilities" }}
capabilities:
{{- toYaml $ctr.capabilities | nindent 4 }}
{{- end }}
{{- if $seccomp }}
seccompProfile:
{{- toYaml $seccomp | nindent 4 }}
{{- end }}
{{- end -}}
{{- end -}}