auth-proxy: proxies only authenticated requests to upstream, redirects to login page otherwise (#103)

* auth-proxy: inspects authenticated user

* ingress: chart and use in rpuppy

* auth-proxy: make it optional in rpuppy

* kratos: whitelist env pub/priv domains for auth return_to addr

* url-shortener: put behind auth-proxy

* pihole: replace oauth2-client with auth-proxy

* auth-proxy: fix upstream uri generation

* pihole: remove old chart using oauth2

* auth-proxy: remove temporary values file

* url-shortener: check x-user header for authentication

* auth: fix allowed_return_urls list

* auth-proxy: fix current address generation logic

---------

Co-authored-by: Giorgi Lekveishvili <lekva@gl-mbp-m1-max.local>
diff --git a/charts/auth-proxy/.helmignore b/charts/auth-proxy/.helmignore
new file mode 100644
index 0000000..0e8a0eb
--- /dev/null
+++ b/charts/auth-proxy/.helmignore
@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/
diff --git a/charts/auth-proxy/Chart.yaml b/charts/auth-proxy/Chart.yaml
new file mode 100644
index 0000000..1578a6c
--- /dev/null
+++ b/charts/auth-proxy/Chart.yaml
@@ -0,0 +1,6 @@
+apiVersion: v2
+name: auth-proxy
+description: A Helm chart for pCloud auth-proxy
+type: application
+version: 0.0.1
+appVersion: "0.0.1"
diff --git a/charts/auth-proxy/templates/install.yaml b/charts/auth-proxy/templates/install.yaml
new file mode 100644
index 0000000..63310c6
--- /dev/null
+++ b/charts/auth-proxy/templates/install.yaml
@@ -0,0 +1,44 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: auth-proxy
+  namespace: {{ .Release.Namespace }}
+spec:
+  type: ClusterIP
+  selector:
+    app: auth-proxy
+  ports:
+  - name: {{ .Values.portName }}
+    port: 80
+    targetPort: {{ .Values.portName }}
+    protocol: TCP
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: auth-proxy
+  namespace: {{ .Release.Namespace }}
+spec:
+  selector:
+    matchLabels:
+      app: auth-proxy
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: auth-proxy
+    spec:
+      containers:
+      - name: auth-proxy
+        image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
+        imagePullPolicy: {{ .Values.image.pullPolicy }}
+        ports:
+        - name: {{ .Values.portName }}
+          containerPort: 8080
+          protocol: TCP
+        command:
+        - server
+        - --port=8080
+        - --whoami-addr={{ .Values.whoAmIAddr }}
+        - --login-addr={{ .Values.loginAddr }}
+        - --upstream={{ .Values.upstream }}
diff --git a/charts/auth-proxy/values.yaml b/charts/auth-proxy/values.yaml
new file mode 100644
index 0000000..9f61b34
--- /dev/null
+++ b/charts/auth-proxy/values.yaml
@@ -0,0 +1,8 @@
+image:
+  repository: giolekva/auth-proxy
+  tag: latest
+  pullPolicy: Always
+upstream: bar.svc.cluster.local
+whoAmIAddr: https://accounts.example.com/sessions/whoami
+loginAddr: https://accounts-ui.example.com/login
+portName: http