feat(ingress): Add additional traefik for internal only access

A new traefik deployment has been added, and two ingressclasses have been set for the new instance, as well as the previous one. This allows the network to be split in two, one for external access and another for internal access. Each traefik deployment is connected to a loadbalancer requesting the IP necessary for each type of access.

README.md

@@ -1,8 +1,10 @@
 # K3s cluster
 
+/!\ CHECK PORT RULES FOR EXPOSING INTERNAL SERVICES
+
 | Name                    | Usage                                | Accessibility | Host         | DB type    | Additional data      | Backup configuration | Loki integration | Prometheus integration | Status                            |
 |-------------------------|--------------------------------------|---------------|--------------|------------|----------------------|----------------------|------------------|------------------------|-----------------------------------|
-| Traefik                 | Reverse proxy and load balancer      | Public*       | Socrates     | -          | -                    | -                    | Configured       | Configured             | Completed                         |
+| Traefik                 | Reverse proxy and load balancer      | Public*       | Socrates     | -          | -                    | -                    | Configured       | Configured             | Completed<sup>5</sup>             |
 | Vaultwarden             | Password manager                     | Public        | Pythagoras-b | MariaDB    | -                    | 4AM K8s CronJob      | Configured       | Not available          | Completed                         |
 | Gitlab                  | Version control system               | Public        | Pythagoras-b | PostgreSQL | User created content | 5AM internal CronJob | Configured       | Configured             | Completed<sup>4</sup>             |
 | Prometheus              | Metrics aggregator                   | Private       | Pythagoras-b | TBD        | -                    | Not configured       | Configured       | Configured             | Partial                           |
@@ -32,6 +34,7 @@
 <sup>2</sup> Missing configuration for NAS volume mounting (over network)<br>
 <sup>3</sup> Missing Longhorn scheduling for saving media_store and secret management<br>
 <sup>4</sup> Backup management is not handled by k3s but by an internal cronjob rule (Change image name when putting to production)<br>
+<sup>5</sup> Missing dashboard configuration<br>
 
 ## Backup management
 ### Databases
@@ -57,7 +60,7 @@ longhorn
 - Change host/deployment specific variables to use environment variables
 - Write CI/CD pipeline to create environment loaded files
 - Write CI/CD pipeline to deploy cluster
-- ~~Setup internal traefik with nodeport as reverse proxy for internal only services~~ Done through internal LB
+- ~~Setup internal traefik with nodeport as reverse proxy for internal only services~~ Done through double ingress class and LB
 - ~~Setup DB container sidecars for automated backups to Longhorn volume~~
 - Setup secrets configuration through CI/CD variable injection
 - Explore permission issues when issuing OVH API keys (not working for wildcard and `beta.halia.dev` subdomain)
@@ -103,5 +106,11 @@ This ansible script could create one (or more) additional client(s) depending on
 Cf : https://docs.k3s.io/advanced#auto-deploying-manifests
 
 ### Development domains
-To access a service publicly when developping, the domain name should be *.beta.halia.dev
+To access a service publicly when developing, the domain name should be *.beta.halia.dev
 To only expose a service internally, the domain name should be *.k3s.beta
+
+### Ingresses
+To split between external and internal services, two traefik ingresses are implemented through the `ingressclass` annotation.
+`traefik-external` will only allow external access to a given service, while `traefik-internal` restrict to an internal only access.
+
+

traefik/1-traefik-external/service.yaml

@@ -26,7 +26,7 @@ items:
         name: minecrafttcp
         targetPort: "minecrafttcp"
         protocol: TCP
-      - port: 80
+      - port: 80 # Change port here to accomodate for internal only services
         name: web
         targetPort: "web"
         protocol: TCP

traefik/1-traefik-internal/deployment.yaml

@@ -0,0 +1,146 @@
+---
+# Source: traefik/templates/deployment.yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: traefik-inter
+  labels:
+    app.kubernetes.io/name: traefik-inter
+    app.kubernetes.io/instance: traefik-inter
+  annotations:
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: traefik-inter
+      app.kubernetes.io/instance: traefik-inter
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 1
+  minReadySeconds: 0
+  template: 
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/path: "/metrics"
+        prometheus.io/port: "9100"
+      labels:
+        app.kubernetes.io/name: traefik-inter
+        app.kubernetes.io/instance: traefik-inter
+    spec:
+      serviceAccountName: traefik
+      terminationGracePeriodSeconds: 60
+      hostNetwork: false
+      containers:
+      - image: "traefik:2.8.4"
+        imagePullPolicy: IfNotPresent
+        name: traefik-inter
+        resources:
+        readinessProbe:
+          httpGet:
+            path: /ping
+            port: 9000
+          failureThreshold: 1
+          initialDelaySeconds: 10
+          periodSeconds: 10
+          successThreshold: 1
+          timeoutSeconds: 2
+        livenessProbe:
+          httpGet:
+            path: /ping
+            port: 9000
+          failureThreshold: 3
+          initialDelaySeconds: 10
+          periodSeconds: 10
+          successThreshold: 1
+          timeoutSeconds: 2
+        ports:
+        - name: "admin"
+          containerPort: 8080
+          protocol: "TCP"
+        - name: "metrics"
+          containerPort: 9100
+          protocol: "TCP"
+        - name: "traefik"
+          containerPort: 9000
+          protocol: "TCP"
+        - name: "web"
+          containerPort: 8000
+          protocol: "TCP"
+        - name: "websecure"
+          containerPort: 8443
+          protocol: "TCP"
+        securityContext:
+          capabilities:
+            drop:
+            - ALL
+          readOnlyRootFilesystem: true
+          runAsGroup: 65532
+          runAsNonRoot: true
+          runAsUser: 65532
+        volumeMounts:
+          - name: data
+            mountPath: /certs
+          - name: tmp
+            mountPath: /tmp
+        args:
+          - "--global.checknewversion"
+          - "--entrypoints.admin.address=:8080/tcp"
+          - "--entrypoints.metrics.address=:9100/tcp"
+          - "--entrypoints.traefik.address=:9000/tcp"
+          - "--entrypoints.web.address=:8000/tcp"
+          - "--entrypoints.websecure.address=:8443/tcp"
+          - "--api.dashboard=true"
+          - "--api.insecure=true"
+          - "--ping=true"
+          - "--metrics.prometheus=true"
+          - "--metrics.prometheus.entrypoint=metrics"
+          - "--providers.kubernetescrd"
+          - "--providers.kubernetesingress"
+          - "--providers.kubernetescrd.ingressclass=traefik-inter"
+          - "--providers.kubernetesingress.ingressclass=traefik-inter"
+          - "--entrypoints.web.http.redirections.entryPoint.to=:443"
+          - "--entrypoints.web.http.redirections.entryPoint.scheme=https"
+          - "--log.level=DEBUG"
+          - "--accesslog=true"
+          - "--entrypoints.websecure.http.tls=true"
+          - "--entrypoints.websecure.http.tls.certresolver=letsencrypt"
+          - "--entrypoints.websecure.http.tls.domains[0].main=k3s.beta"
+          - "--entrypoints.websecure.http.tls.domains[0].sans=*.k3s.beta"
+          - "--certificatesresolvers.letsencrypt.acme.tlschallenge=true"
+          - "--certificatesresolvers.letsencrypt.acme.dnschallenge=true"
+          - "--certificatesresolvers.letsencrypt.acme.dnschallenge.provider=ovh"
+          - "--certificatesresolvers.letsencrypt.acme.dnschallenge.resolvers=1.1.1.1"
+          - "--certificatesresolvers.letsencrypt.acme.email=tanguy.herbron@outlook.com"
+          - "--certificatesresolvers.letsencrypt.acme.storage=/certs/acme.json"
+        env:
+          - name: OVH_APPLICATION_KEY
+            valueFrom:
+              secretKeyRef:
+                key: appKey
+                name: ovh-api-credentials
+          - name: OVH_APPLICATION_SECRET
+            valueFrom:
+              secretKeyRef:
+                key: appSecret
+                name: ovh-api-credentials
+          - name: OVH_CONSUMER_KEY
+            valueFrom:
+              secretKeyRef:
+                key: consumerKey
+                name: ovh-api-credentials
+          - name: OVH_ENDPOINT
+            valueFrom:
+              secretKeyRef:
+                key: endpoint
+                name: ovh-api-credentials
+      volumes:
+        - name: data
+          persistentVolumeClaim:
+            claimName: traefik-inter
+        - name: tmp
+          emptyDir: {}
+      securityContext:
+        fsGroup: 65532

traefik/1-traefik-internal/pvc.yaml

@@ -0,0 +1,18 @@
+---
+# Source: traefik/templates/pvc.yaml
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: traefik-inter
+  annotations:
+    helm.sh/resource-policy: keep
+  labels:
+    app.kubernetes.io/name: traefik-inter
+    app.kubernetes.io/instance: traefik-inter
+spec:
+  accessModes:
+    - "ReadWriteOnce"
+  resources:
+    requests:
+      storage: "128Mi"
+  storageClassName: "local-path"

traefik/1-traefik-internal/service.yaml

@@ -10,22 +10,16 @@ items:
     metadata:
       name: traefik-internal
       labels:
-        app.kubernetes.io/name: traefik-internal
-        helm.sh/chart: traefik-10.24.2
-        app.kubernetes.io/managed-by: Helm
-        app.kubernetes.io/instance: traefik
+        app.kubernetes.io/name: traefik-inter
+        app.kubernetes.io/instance: traefik-inter
       annotations:
     spec:
       type: LoadBalancer
       loadBalancerIP: 10.10.0.64
       selector:
-        app.kubernetes.io/name: traefik
-        app.kubernetes.io/instance: traefik
+        app.kubernetes.io/name: traefik-inter
+        app.kubernetes.io/instance: traefik-inter
       ports:
-      - port: 25565
-        name: minecrafttcp
-        targetPort: "minecrafttcp"
-        protocol: TCP
       - port: 80
         name: web
         targetPort: "web"

traefik/dashboard-hook-ingressroute.yaml

@@ -1,22 +0,0 @@
----
-# Source: traefik/templates/dashboard-hook-ingressroute.yaml
-apiVersion: traefik.containo.us/v1alpha1
-kind: IngressRoute
-metadata:
-  name: traefik-dashboard
-  annotations:
-    helm.sh/hook: "post-install,post-upgrade"
-  labels:
-    app.kubernetes.io/name: traefik
-    helm.sh/chart: traefik-10.24.2
-    app.kubernetes.io/managed-by: Helm
-    app.kubernetes.io/instance: traefik
-spec:
-  entryPoints:
-    - traefik
-  routes:
-  - match: PathPrefix(`/dashboard`) || PathPrefix(`/api`)
-    kind: Rule
-    services:
-    - name: api@internal
-      kind: TraefikService

traefik/dashboard.yaml

@@ -1,13 +0,0 @@
-apiVersion: traefik.containo.us/v1alpha1
-kind: IngressRoute
-metadata:
-    name: traefik-dashboard
-spec:
-    entryPoints:
-        - websecure
-    routes:
-        - kind: Rule
-          match: Host(`traefik.k3s.beta`)
-          services:
-              - name: api@internal
-                kind: TraefikService