Ability to add env var to chart deployment

Author: tcarmet

bert_e/server/__init__.py

@@ -78,7 +78,9 @@ def setup_server(bert_e):
         'WTF_CSRF_SECRET_KEY': secrets.token_hex(24),
     })
 
-    app.wsgi_app = ReverseProxied(app.wsgi_app)
+    app_prefix = os.getenv('APP_PREFIX', '/')
+
+    app.wsgi_app = ReverseProxied(app.wsgi_app, app_prefix)
 
     app.bert_e = bert_e
 

bert_e/server/reverse_proxy.py

@@ -23,24 +23,12 @@ class ReverseProxied(object):
         - app: the WSGI application
 
     """
-    def __init__(self, app):
+    def __init__(self, app, prefix=""):
         self.app = app
+        self.prefix = prefix
 
     def __call__(self, environ, start_response):
-        script_name = environ.get('HTTP_X_SCRIPT_NAME', None)
-        if script_name is not None:
-            environ['SCRIPT_NAME'] = script_name
-            path_info = environ['PATH_INFO']
-            if path_info.startswith(script_name):
-                path_info = path_info[len(script_name):]
-                environ['PATH_INFO'] = path_info
-
-        scheme = environ.get('HTTP_X_SCHEME', None)
-        if scheme is not None:
-            environ['wsgi_url_scheme'] = scheme
-
-        server = environ.get('HTTP_X_FORWARDED_SERVER', None)
-        if server:
-            environ['HTTP_HOST'] = server
-
+        if environ['PATH_INFO'].startswith(self.prefix):
+            environ['PATH_INFO'] = environ['PATH_INFO'][len(self.prefix):]
+            environ['SCRIPT_NAME'] = self.prefix
         return self.app(environ, start_response)

charts/bert-e/templates/deployment.yaml

@@ -22,6 +22,7 @@ spec:
       annotations:
         checksum/settings: {{ include (print $.Template.BasePath "/settings.yaml") . | sha256sum }}
         checksum/secret: {{ include (print $.Template.BasePath "/secrets.yaml") . | sha256sum }}
+        checksum/env: {{ include (print $.Template.BasePath "/env.yaml") . | sha256sum }}
     spec:
       {{- if .Values.image.pullSecrets }}
       imagePullSecrets:
@@ -36,6 +37,10 @@ spec:
         envFrom:
         - secretRef:
             name: {{ template "fullname" $ }}
+        {{- if .Values.deployment.env }}
+        - configMapRef:
+            name: {{ template "fullname" $ }}-env
+        {{- end }}
         ports:
         - name: http
           containerPort: {{ .Values.deployment.servicePort }}

charts/bert-e/templates/env.yaml

@@ -0,0 +1,15 @@
+{{- if .Values.deployment.env }}
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "fullname" $ }}-env
+  labels:
+    app: {{ template "fullname" $ }}
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+type: Opaque
+data:
+{{ .Values.deployment.env | toYaml | indent 2 }}
+{{- end }}

charts/bert-e/values.yaml

@@ -313,6 +313,9 @@ image:
 
 ## Kubernetes deployment configuration
 deployment:
+  # Setup env vars on the deployment
+  env: {}
+    # MY_VAR: MY_VALUE
 
   ## Configure extra options for liveness and readiness probes
   livenessProbe: