feat(platform): deploy the observability-proxy

The proxy only answers for stores that the monitoring stack runs, so it
follows monitoring-agents: on by default in the full variants and
opt-in through enabledPackages on the slim ones, where monitoring is
opt-in too. It is a stateless reader with no CRDs, so networking is its
only dependency.

Assisted-by: LLM
Signed-off-by: ZverGuy <maximbel2003@gmail.com>

packages/core/platform/sources/observability-proxy.yaml

@@ -0,0 +1,21 @@
+---
+apiVersion: cozystack.io/v1alpha1
+kind: PackageSource
+metadata:
+  name: cozystack.observability-proxy
+spec:
+  sourceRef:
+    kind: OCIRepository
+    name: cozystack-packages
+    namespace: cozy-system
+    path: /
+  variants:
+  - name: default
+    dependsOn:
+    - cozystack.networking
+    components:
+    - name: observability-proxy
+      path: system/observability-proxy
+      install:
+        namespace: cozy-observability-proxy
+        releaseName: observability-proxy

packages/core/platform/templates/bundles/system.yaml

@@ -344,6 +344,7 @@ variants and opt-in on the slim ones. */}}
 {{include "cozystack.platform.package.full.default" (list "cozystack.metrics-server" $) }}
 {{- $monitoringAgentsComponents := dict "monitoring-agents" (dict "values" (dict "global" (dict "target" "tenant-root"))) -}}
 {{include "cozystack.platform.package.full" (list "cozystack.monitoring-agents" "default" $ $monitoringAgentsComponents) }}
+{{include "cozystack.platform.package.full.default" (list "cozystack.observability-proxy" $) }}
 {{include "cozystack.platform.package.full.default" (list "cozystack.goldpinger" $) }}
 {{include "cozystack.platform.package.default" (list "cozystack.prometheus-operator-crds" $) }}
 {{include "cozystack.platform.package.full.default" (list "cozystack.grafana-operator" $) }}

packages/core/platform/tests/fixtures/selective-install-postgres-values.yaml

@@ -42,6 +42,7 @@ bundles:
     - cozystack.monitoring
     - cozystack.nats-application
     - cozystack.nfs-driver
+    - cozystack.observability-proxy
     - cozystack.openbao-application
     - cozystack.opensearch-application
     - cozystack.opensearch-operator

packages/core/platform/tests/observability_proxy_wiring_test.yaml

@@ -0,0 +1,69 @@
+suite: observability-proxy package wiring
+# The proxy reads the tenant log and metrics stores, which the full variants
+# run by default and the slim ones only on request, so it follows
+# monitoring-agents: on by default in the full variants, opt-in on the slim.
+templates:
+  - templates/sources.yaml
+  - templates/bundles/system.yaml
+release:
+  name: cozystack
+  namespace: cozy-system
+tests:
+  - it: installs into cozy-observability-proxy once networking is up
+    template: templates/sources.yaml
+    documentSelector:
+      path: metadata.name
+      value: cozystack.observability-proxy
+    asserts:
+      - equal:
+          path: kind
+          value: PackageSource
+      - equal:
+          path: spec.variants[0].dependsOn
+          value:
+            - cozystack.networking
+      - equal:
+          path: spec.variants[0].components
+          value:
+            - name: observability-proxy
+              path: system/observability-proxy
+              install:
+                namespace: cozy-observability-proxy
+                releaseName: observability-proxy
+
+  - it: emits the package on a full variant
+    template: templates/bundles/system.yaml
+    values:
+      - ../values-isp-full.yaml
+    asserts:
+      - containsDocument:
+          apiVersion: cozystack.io/v1alpha1
+          kind: Package
+          name: cozystack.observability-proxy
+          any: true
+
+  - it: leaves the package out of a slim variant by default
+    template: templates/bundles/system.yaml
+    values:
+      - ../values-isp-slim.yaml
+    asserts:
+      - containsDocument:
+          apiVersion: cozystack.io/v1alpha1
+          kind: Package
+          name: cozystack.observability-proxy
+          any: true
+        not: true
+
+  - it: emits the package on a slim variant that lists it in enabledPackages
+    template: templates/bundles/system.yaml
+    values:
+      - ../values-isp-slim.yaml
+    set:
+      bundles.enabledPackages:
+        - cozystack.observability-proxy
+    asserts:
+      - containsDocument:
+          apiVersion: cozystack.io/v1alpha1
+          kind: Package
+          name: cozystack.observability-proxy
+          any: true