Added helm charts for internal-gateway-scg (#2488)

deploy-as-code/helm/charts/core-services/internal-gateway-scg/Chart.yaml

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+apiVersion: v2
+name: internal-gateway-scg
+description: A Helm chart for Kubernetes
+
+# 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.
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application.
+appVersion: 1.16.0
+
+dependencies:
+- name: common
+  version: 0.0.5
+  repository: file://../../common

deploy-as-code/helm/charts/core-services/internal-gateway-scg/templates/deployment.yaml

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+# deployment.yaml
+{{- template "common.deployment" . -}}

deploy-as-code/helm/charts/core-services/internal-gateway-scg/templates/role.yaml

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+{{- $envOverrides := index .Values (tpl .Chart.Name .) -}} 
+{{- $baseValues := .Values | deepCopy -}}
+{{- $values := dict "Values" (mustMergeOverwrite $baseValues $envOverrides) -}}
+{{- with mustMergeOverwrite . $values }}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  labels:
+    app: {{ .Chart.Name }}
+    group: gateway
+  name: {{ .Chart.Name }}
+  namespace: {{ .Values.namespace }}
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - services
+  - endpoints
+  - pods
+  verbs:
+  - get
+  - list
+  - watch   
+{{- end -}}  

deploy-as-code/helm/charts/core-services/internal-gateway-scg/templates/rolebinding.yaml

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+{{- $envOverrides := index .Values (tpl .Chart.Name .) -}} 
+{{- $baseValues := .Values | deepCopy -}}
+{{- $values := dict "Values" (mustMergeOverwrite $baseValues $envOverrides) -}}
+{{- with mustMergeOverwrite . $values }}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  labels:
+    app: {{ .Chart.Name }}
+    group: gateway
+  name: {{ .Chart.Name }}
+  namespace: {{ .Values.namespace }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: {{ .Chart.Name }}
+subjects:
+- kind: ServiceAccount
+  name: {{ .Values.serviceAccount }}
+  namespace: {{ .Values.namespace }}   
+{{- end -}}  

deploy-as-code/helm/charts/core-services/internal-gateway-scg/templates/service.yaml

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+# service.yaml
+{{- template "common.service" . -}}

deploy-as-code/helm/charts/core-services/internal-gateway-scg/templates/serviceaccount.yaml

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+{{- $envOverrides := index .Values (tpl .Chart.Name .) -}} 
+{{- $baseValues := .Values | deepCopy -}}
+{{- $values := dict "Values" (mustMergeOverwrite $baseValues $envOverrides) -}}
+{{- with mustMergeOverwrite . $values }}
+{{- if or .Values.serviceAccount -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  labels:
+    app: {{ .Chart.Name }}
+    group: gateway
+  name: {{ .Values.serviceAccount }}
+  namespace: {{ .Values.namespace }}  
+{{- end -}}   
+{{- end -}}   

deploy-as-code/helm/charts/core-services/internal-gateway-scg/values.yaml

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+# Common Labels
+labels:
+  app: "internal-gateway-scg"
+  group: "gateway"
+
+serviceAccount: internal-gateway-scg
+namespace: egov
+
+# Ingress Configs
+ingress:
+  enabled: true
+  zuul: true
+  context: "internal-gateway-scg"
+
+# Init Containers Configs
+initContainers: {}
+
+# Container Configs
+image:
+  repository: "internal-gateway-scg"
+replicas: "1"
+healthChecks:
+  enabled: true
+  livenessProbePath: "/health"
+  readinessProbePath: "/health"
+custom-filter-property: "false"
+posthook-config: ""
+prehook-config: ""
+heap: "-Xmx192m -Xms192m"
+appType: "java-spring"
+tracing-enabled: true
+server-tomcat-max-threads: "350"
+server-tomcat-max-connections: "1500"
+java-args: ""
+eventlog-enabled: "false"
+#eventlog-topic: "zuul-event-log"
+eventlog-urls-whitelist: ""
+home-isolation-chatbot-router-enabled: false
+
+# Additional Container Envs
+env: |
+  - name: SERVER_PORT
+    value: "8080"
+  - name: JAVA_OPTS
+    value: {{ index .Values "heap" | quote }}     
+  - name: ZUUL_HOST_CONNECT_TIMEOUT_MILLIS
+    value: "20000"
+  - name: ZUUL_HOST_SOCKET_TIMEOUT_MILLIS
+    value: "60000"
+  {{- if index .Values "tracing-enabled" }}
+  - name: TRACER_OPENTRACING_ENABLED
+    value: "true"
+  {{- end }}
+  - name: SECURITY_BASIC_ENABLED
+    value: "false"
+  - name: MANAGEMENT_SECURITY_ENABLED
+    value: "false"
+  - name: JAVA_ARGS
+    value: {{ index .Values "java-args" | quote }}  
+  - name: EGOV_SERVICE_CONFIG_PATH
+    value: "https://raw.githubusercontent.com/egovernments/configs/central-instance/internal-gateway.json" 
+  - name: STATE_LEVEL_TENANT_ID
+    valueFrom:
+      configMapKeyRef:
+        name: egov-config
+        key: egov-state-level-tenant-id