feat: add authservice to uds-core (#153)

defenseunicorns · Feb 10, 2024 · b0b33b9 · b0b33b9
1 parent 4b3bdcf
commit b0b33b9
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Showing 18 changed files with 672 additions and 11 deletions.
diff --git a/packages/standard/zarf.yaml b/packages/standard/zarf.yaml
@@ -8,6 +8,7 @@ metadata:
   # x-release-please-end
 
 components:
+  # CRDs
   - name: prometheus-operator-crds
     required: true
     import:
@@ -65,12 +66,20 @@ components:
     import:
       path: ../../src/prometheus-stack
 
+  # Promtail
   - name: promtail
     required: true
     import:
       path: ../../src/promtail
 
+  # Grafana
   - name: grafana
     required: true
     import:
       path: ../../src/grafana
+
+  # Authservice
+  - name: authservice
+    required: true
+    import:
+      path: ../../src/authservice
diff --git a/src/authservice/chart/Chart.yaml b/src/authservice/chart/Chart.yaml
@@ -0,0 +1,23 @@
+apiVersion: v2
+name: authservice
+description: A Helm chart for Istio Authservice
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.5.3
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+appVersion: 0.5.3
diff --git a/src/authservice/chart/templates/_helpers.tpl b/src/authservice/chart/templates/_helpers.tpl
@@ -0,0 +1,58 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "authservice.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "authservice.fullname" -}}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "authservice.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "authservice.labels" -}}
+helm.sh/chart: {{ include "authservice.chart" . }}
+{{ include "authservice.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "authservice.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "authservice.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "authservice.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "authservice.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
diff --git a/src/authservice/chart/templates/authn.yaml b/src/authservice/chart/templates/authn.yaml
@@ -0,0 +1,20 @@
+# Authservice is non-functional without Istio/RequestAuthentication but we wrap this in a conditional to handle standalone testing
+{{- if .Capabilities.APIVersions.Has "security.istio.io/v1beta1" }}
+apiVersion: security.istio.io/v1beta1
+kind: RequestAuthentication
+metadata:
+  name: jwt-authn
+  namespace: istio-system
+spec:
+  selector:
+    matchLabels:
+      {{ .Values.selector.key }}: {{ .Values.selector.value | quote }}
+  jwtRules:
+    - issuer: https://{{ .Values.global.oidc.host }}/auth/realms/{{ .Values.global.oidc.realm }}
+    {{- if .Values.global.jwks }}
+      jwks: {{ .Values.global.jwks | quote }}
+    {{- else }}
+      jwksUri: https://{{ .Values.global.oidc.host }}/auth/realms/{{ .Values.global.oidc.realm }}/protocol/openid-connect/certs
+    {{- end }}
+      forwardOriginalToken: true
+{{- end }}
diff --git a/src/authservice/chart/templates/authz.yaml b/src/authservice/chart/templates/authz.yaml
@@ -0,0 +1,41 @@
+# Authservice is non-functional without Istio/AuthorizationPolicy but we wrap this in a conditional to handle standalone testing
+{{- if .Capabilities.APIVersions.Has "security.istio.io/v1beta1" }}
+apiVersion: security.istio.io/v1beta1
+kind: AuthorizationPolicy
+metadata:
+  name: authservice
+  namespace: istio-system
+spec:
+  selector:
+    matchLabels:
+      {{ .Values.selector.key }}: {{ .Values.selector.value | quote }}
+  action: CUSTOM
+  provider:
+    name: authservice
+  rules:
+  {{- if .Values.allow_unmatched_requests }}
+  - {}
+  {{- else if .Values.custom_authpolicy_rules }}
+{{ .Values.custom_authpolicy_rules | toYaml | indent 2 }}
+  {{- else }}
+  - to:
+    - operation:
+        hosts:
+        - "*.{{ .Values.domain }}"
+  {{- end }}
+---
+apiVersion: security.istio.io/v1beta1
+kind: AuthorizationPolicy
+metadata:
+  name: jwt-authz
+  namespace: istio-system
+spec:
+  selector:
+    matchLabels:
+      {{ .Values.selector.key }}: {{ .Values.selector.value | quote }}
+  rules:
+  - from:
+    - source:
+        requestPrincipals:
+        - "https://{{ .Values.global.oidc.host }}/auth/realms/{{ .Values.global.oidc.realm }}/*"
+{{- end }}
diff --git a/src/authservice/chart/templates/deployment.yaml b/src/authservice/chart/templates/deployment.yaml
@@ -0,0 +1,99 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "authservice.fullname" . }}
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "authservice.labels" . | nindent 4 }}
+spec:
+{{- if not .Values.autoscaling.enabled }}
+  replicas: {{ .Values.replicaCount }}
+{{- end }}
+  selector:
+    matchLabels:
+      {{- include "authservice.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      annotations:
+        checksum/config: {{ include (print $.Template.BasePath "/secret.yaml") . | sha256sum }}
+        {{- with .Values.podAnnotations }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+      labels:
+        {{- include "authservice.selectorLabels" . | nindent 8 }}
+    spec:
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          {{- if .Values.global.certificate_authority }}
+          env:
+            - name: SSL_CERT_FILE
+              value: /mnt/ca-bundle/ca-bundle.crt
+          {{- end}}
+          ports:
+            - name: http
+              containerPort: 10003
+              protocol: TCP
+          livenessProbe:
+            tcpSocket:
+              port: 10003
+          readinessProbe:
+            tcpSocket:
+              port: 10003
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          volumeMounts:
+            - name: {{ include "authservice.name" . }}
+              mountPath: /etc/authservice
+            {{- if .Values.global.certificate_authority }}
+            - name: ca-bundle
+              mountPath: /mnt/ca-bundle              
+            {{- end }}
+      {{- if .Values.global.certificate_authority }}
+      initContainers:
+        - name: update-ca-bundle
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          command:
+            - sh
+            - -c
+            - |
+              cat /etc/pki/tls/certs/* > /mnt/ca-bundle/ca-bundle.crt
+          volumeMounts:
+            - name: sso-tls-ca
+              mountPath: /etc/pki/tls/certs/oidc-ca.crt
+              subPath: oidc-ca.crt
+              readOnly: true              
+            - name: ca-bundle
+              mountPath: /mnt/ca-bundle
+      {{- end }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      volumes:
+        - name: {{ include "authservice.name" . }}
+          secret:
+            secretName: {{ include "authservice.fullname" . }}
+        {{- if .Values.global.certificate_authority }}
+        - name: sso-tls-ca
+          secret:
+            secretName: {{ include "authservice.fullname" . }}-sso-tls-ca
+        - name: ca-bundle
+          emptyDir:
+            sizeLimit: 5Mi
+        {{- end}}
diff --git a/src/authservice/chart/templates/hpa.yaml b/src/authservice/chart/templates/hpa.yaml
@@ -0,0 +1,33 @@
+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "authservice.fullname" . }}
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "authservice.labels" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "authservice.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+  {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
+  {{- end }}
+  {{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
+  {{- end }}
+{{- end }}
diff --git a/src/authservice/chart/templates/secret-ca.yaml b/src/authservice/chart/templates/secret-ca.yaml
@@ -0,0 +1,11 @@
+{{- if .Values.global.certificate_authority }}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ include "authservice.fullname" . }}-sso-tls-ca
+  namespace: {{ .Release.Namespace }}
+  labels:
+    {{- include "authservice.labels" . | nindent 4 }}
+stringData:
+  oidc-ca.crt: {{ .Values.global.certificate_authority | quote }}
+{{- end }}