feat: automatically roll deployments

The following patch extends the chart to automatically roll the deployment, when
one of the configurations, stored in a config map or secret, has been changed.

The implementation add annotations which triggers `helm update` or ArgoCD to
roll the deployment. Further information can be found on the official helm
website:

  https://helm.sh/docs/howto/charts_tips_and_tricks/#automatically-roll-deployments

.gitea/workflows/generate-readme.yaml

@@ -15,7 +15,7 @@ on:
 jobs:
   generate-parameters:
     container:
-      image: docker.io/library/node:23.7.0-alpine
+      image: docker.io/library/node:24.1.0-alpine
     runs-on:
     - ubuntu-latest
     steps:

.gitea/workflows/helm.yaml

@@ -13,7 +13,7 @@ on:
 jobs:
   helm-lint:
     container:
-      image: docker.io/volkerraschek/helm:3.16.4
+      image: docker.io/volkerraschek/helm:3.18.0
     runs-on:
     - ubuntu-latest
     steps:
@@ -28,7 +28,7 @@ jobs:
 
   helm-unittest:
     container:
-      image: docker.io/volkerraschek/helm:3.16.4
+      image: docker.io/volkerraschek/helm:3.18.0
     runs-on:
     - ubuntu-latest
     steps:

.gitea/workflows/markdown-linters.yaml

@@ -15,7 +15,7 @@ on:
 jobs:
   markdown-link-checker:
     container:
-      image: docker.io/library/node:23.7.0-alpine
+      image: docker.io/library/node:24.1.0-alpine
     runs-on:
     - ubuntu-latest
     steps:
@@ -31,7 +31,7 @@ jobs:
 
   markdown-lint:
     container:
-      image: docker.io/library/node:23.7.0-alpine
+      image: docker.io/library/node:24.1.0-alpine
     runs-on:
     - ubuntu-latest
     steps:

.gitea/workflows/release.yaml

@@ -8,7 +8,7 @@ on:
 jobs:
   publish-chart:
     container:
-      image: docker.io/volkerraschek/helm:3.16.4
+      image: docker.io/volkerraschek/helm:3.18.0
     runs-on: ubuntu-latest
     steps:
       - name: Install tooling

Chart.yaml

@@ -4,7 +4,7 @@ description: Prometheus metric exporter for PostgreSQL
 type: application
 kubeVersion: ">=1.20.0"
 version: "0.1.0"
-appVersion: "0.16.0"
+appVersion: "0.17.1"
 
 # icon: https://annotations.example.com/icon.png
 

Makefile

@@ -4,13 +4,13 @@ CONTAINER_RUNTIME?=$(shell which podman)
 # HELM_IMAGE
 HELM_IMAGE_REGISTRY_HOST?=docker.io
 HELM_IMAGE_REPOSITORY?=volkerraschek/helm
-HELM_IMAGE_VERSION?=3.16.1 # renovate: datasource=docker registryUrl=https://docker.io depName=volkerraschek/helm
+HELM_IMAGE_VERSION?=3.18.0 # renovate: datasource=docker registryUrl=https://docker.io depName=volkerraschek/helm
 HELM_IMAGE_FULLY_QUALIFIED=${HELM_IMAGE_REGISTRY_HOST}/${HELM_IMAGE_REPOSITORY}:${HELM_IMAGE_VERSION}
 
 # NODE_IMAGE
 NODE_IMAGE_REGISTRY_HOST?=docker.io
 NODE_IMAGE_REPOSITORY?=library/node
-NODE_IMAGE_VERSION?=22.9.0-alpine # renovate: datasource=docker registryUrl=https://docker.io depName=library/node
+NODE_IMAGE_VERSION?=24.1.0-alpine # renovate: datasource=docker registryUrl=https://docker.io depName=docker.io/library/node packageName=library/node
 NODE_IMAGE_FULLY_QUALIFIED=${NODE_IMAGE_REGISTRY_HOST}/${NODE_IMAGE_REPOSITORY}:${NODE_IMAGE_VERSION}
 
 # MISSING DOT

README.md

@@ -1,11 +1,12 @@
 # Prometheus PostgreSQL exporter
 
-[![Build Status](https://drone.cryptic.systems/api/badges/volker.raschek/prometheus-postgres-exporter/status.svg)](https://drone.cryptic.systems/volker.raschek/prometheus-postgres-exporter)
 [![Artifact Hub](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/repository/prometheus-exporters)](https://artifacthub.io/packages/search?repo=prometheus-exporters)
 
 > [!NOTE]
-> This is not the official *community* helm chart of the Prometheus metric exporter for PostgreSQL databases. You can
+> This is not the official *community* helm chart of the Prometheus metric exporter for PostgreSQL databases. If you are
-> find the official community chart [here](https://github.com/prometheus-community/helm-charts).
+> looking for the official helm chart, checkout the GitHub project
+> [helm-charts](https://github.com/prometheus-community/helm-charts) of the [Prometheus
+> community](https://github.com/prometheus-community).
 
 This helm chart enables the deployment of a Prometheus metrics exporter for PostgreSQL databases and allows the
 individual configuration of additional containers/initContainers, mounting of volumes, defining additional environment
@@ -20,7 +21,7 @@ helm chart is tested for deployment scenarios with **ArgoCD**.
 ## Helm: configuration and installation
 
 1. A helm chart repository must be configured, to pull the helm charts from.
-2. All available parameters are [here](#parameters) in detail documented. The parameters can be defined via the helm
+2. All available [parameters](#parameters) are documented in detail below. The parameters can be defined via the helm
    `--set` flag or directly as part of a `values.yaml` file. The following example defines the `prometheus-exporter`
    repository and use the `--set` flag for a basic deployment.
 
@@ -46,7 +47,7 @@ version of the chart must be in sync with the `values.yaml`. Newer *minor* versi
 versions can break something!
 
 ```bash
-CHART_VERSION=0.3.2
+CHART_VERSION=0.4.2
 helm show values prometheus-exporters/prometheus-postgres-exporter --version "${CHART_VERSION}" > values.yaml
 ```
 
@@ -71,14 +72,17 @@ cannot use the available CPU time to perform computing operations.
 
 The application must be informed that despite several CPUs only a part (limit) of the available computing time is
 available. As this is a Golang application, this can be implemented using `GOMAXPROCS`. The following example is one way
-of defining `GOMAXPROCS` automatically based on the defined CPU limit like `100m`. Please keep in mind, that the CFS
+of defining `GOMAXPROCS` automatically based on the defined CPU limit like `1000m`. Please keep in mind, that the CFS
 rate of `100ms` - default on each kubernetes node, is also very important to avoid CPU throttling.
 
-Further information about this topic can be found [here](https://kanishk.io/posts/cpu-throttling-in-containerized-go-apps/).
+Further information about this topic can be found in one of Kanishk's blog
+[posts](https://kanishk.io/posts/cpu-throttling-in-containerized-go-apps/).
 
 > [!NOTE]
 > The environment variable `GOMAXPROCS` is set automatically, when a CPU limit is defined. An explicit configuration is
 > not anymore required.
+>
+> Please take care the a CPU limit < `1000m` can also lead to CPU throttling. Please read the linked documentation carefully.
 
 ```bash
 helm install prometheus-postgres-exporter prometheus-exporters/prometheus-postgres-exporter \
@@ -89,7 +93,7 @@ helm install prometheus-postgres-exporter prometheus-exporters/prometheus-postgr
   --set 'prometheus.metrics.serviceMonitor.enabled=true' \
   --set 'deployment.postgresExporter.env.name=GOMAXPROCS' \
   --set 'deployment.postgresExporter.env.valueFrom.resourceFieldRef.resource=limits.cpu' \
-  --set 'deployment.postgresExporter.resources.limits.cpu=100m'
+  --set 'deployment.postgresExporter.resources.limits.cpu=1000m'
 ```
 
 #### TLS authentication and encryption
@@ -187,6 +191,75 @@ deployment:
             - postgres
 ```
 
+### Network policies
+
+Network policies can only take effect, when the used CNI plugin support network policies. The chart supports no custom
+network policy implementation of CNI plugins. It's support only the official API resource of `networking.k8s.io/v1`.
+
+The object networkPolicies can contains multiple networkPolicy definitions. There is currently only one example
+predefined - it's named `default`. Further networkPolicy rules can easy be added by defining additional objects. For example:
+
+> [!NOTE]
+> The structure of each custom network policy must be equal like that of default. For this reason don't forget to define
+> `annotations`, `labels` and the other properties as well.
+
+```yaml
+networkPolicies:
+  enabled: false
+  default: {}
+  my-custom-network-policy: {}
+```
+
+The example below is an excerpt of the `values.yaml` file. The network policy `default` contains ingress rules to allow
+incoming traffic from Prometheus. Additionally two egress rules are defined, to allow the application outgoing access to
+the internal running DNS server `core-dns` and the external running postgres database listen on `10.14.243.12`.
+
+> [!IMPORTANT]
+> Please keep in mind, that the namespace and pod selector labels can be different from environment to environment. For
+> this reason, there is are not default network policy rules defined.
+
+```yaml
+networkPolicies:
+  enabled: true
+  default:
+    enabled: true
+    annotations: {}
+    labels: {}
+    policyTypes:
+    - Egress
+    - Ingress
+    egress:
+    - to:
+      - ipBlock:
+          cidr: 10.14.243.12/32
+      ports:
+      - port: 5432
+        protocol: TCP
+    - to:
+      - namespaceSelector:
+          matchLabels:
+            kubernetes.io/metadata.name: kube-system
+        podSelector:
+          matchLabels:
+           k8s-app: kube-dns
+      ports:
+      - port: 53
+        protocol: TCP
+      - port: 53
+        protocol: UDP
+    ingress:
+    - from:
+      - namespaceSelector:
+          matchLabels:
+            kubernetes.io/metadata.name: monitoring
+        podSelector:
+          matchLabels:
+            app.kubernetes.io/name: prometheus
+      ports:
+      - port: http
+        protocol: TCP
+```
+
 ## Parameters
 
 ### Global
@@ -198,25 +271,25 @@ deployment:
 
 ### Configuration
 
-| Name                                              | Description                                                                                                                                                                            | Value   |
+| Name                                              | Description                                                                                                                                                                                                                          | Value   |
-| ------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------- |
+| ------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------- |
-| `config.database.existingSecret.enabled`          | Mount an existing secret containing the application specific `DATA_SOURCE_` prefixed environment variables.                                                                            | `false` |
+| `config.database.existingSecret.enabled`          | Mount an existing secret containing the application specific `DATA_SOURCE_` prefixed environment variables.                                                                                                                          | `false` |
-| `config.database.existingSecret.secretName`       | Name of the existing secret containing the application specific `DATA_SOURCE_` prefixed environment variables.                                                                         | `""`    |
+| `config.database.existingSecret.secretName`       | Name of the existing secret containing the application specific `DATA_SOURCE_` prefixed environment variables.                                                                                                                       | `""`    |
-| `config.database.secret.annotations`              | Additional annotations of the secret containing the database credentials.                                                                                                              | `{}`    |
+| `config.database.secret.annotations`              | Additional annotations of the secret containing the database credentials.                                                                                                                                                            | `{}`    |
-| `config.database.secret.labels`                   | Additional labels of the secret containing the database credentials.                                                                                                                   | `{}`    |
+| `config.database.secret.labels`                   | Additional labels of the secret containing the database credentials.                                                                                                                                                                 | `{}`    |
-| `config.database.secret.databaseUsername`         | Database username. Will be defined as env `DATA_SOURCE_USER` as part of a secret.                                                                                                      | `""`    |
+| `config.database.secret.databaseUsername`         | Database username. Will be defined as env `DATA_SOURCE_USER` as part of a secret.                                                                                                                                                    | `""`    |
-| `config.database.secret.databasePassword`         | Database password. Will be defined as env `DATA_SOURCE_PASS` as part of a secret.                                                                                                      | `""`    |
+| `config.database.secret.databasePassword`         | Database password. Will be defined as env `DATA_SOURCE_PASS` as part of a secret.                                                                                                                                                    | `""`    |
-| `config.database.secret.databaseConnectionUrl`    | Complex database connection URL. Will be defined as env `DATA_SOURCE_URI` as part of a secret.                                                                                         | `""`    |
+| `config.database.secret.databaseConnectionUrl`    | Complex database connection URL. Will be defined as env `DATA_SOURCE_URI` as part of a secret.                                                                                                                                       | `""`    |
-| `config.exporterConfig.existingSecret.enabled`    | Mount an existing secret containing the key `exporterConfig.yaml`.                                                                                                                     | `false` |
+| `config.exporterConfig.existingSecret.enabled`    | Mount an existing secret containing the key `exporterConfig.yaml`.                                                                                                                                                                   | `false` |
-| `config.exporterConfig.existingSecret.secretName` | Name of the existing secret containing the key `exporterConfig.yaml`.                                                                                                                  | `""`    |
+| `config.exporterConfig.existingSecret.secretName` | Name of the existing secret containing the key `exporterConfig.yaml`.                                                                                                                                                                | `""`    |
-| `config.exporterConfig.secret.annotations`        | Additional annotations of the secret containing the `exporterConfig.yaml`.                                                                                                             | `{}`    |
+| `config.exporterConfig.secret.annotations`        | Additional annotations of the secret containing the `exporterConfig.yaml`.                                                                                                                                                           | `{}`    |
-| `config.exporterConfig.secret.labels`             | Additional labels of the secret containing the `exporterConfig.yaml`.                                                                                                                  | `{}`    |
+| `config.exporterConfig.secret.labels`             | Additional labels of the secret containing the `exporterConfig.yaml`.                                                                                                                                                                | `{}`    |
-| `config.exporterConfig.secret.exporterConfig`     | Content of the `exporterConfig.yaml`. Further information can be found [here](https://github.com/prometheus-community/postgres_exporter?tab=readme-ov-file#multi-target-support-beta). | `{}`    |
+| `config.exporterConfig.secret.exporterConfig`     | Content of the `exporterConfig.yaml`. Further information can be found in the [README](https://github.com/prometheus-community/postgres_exporter?tab=readme-ov-file#multi-target-support-beta) file of the Postgres exporter binary. | `{}`    |
-| `config.webConfig.existingSecret.enabled`         | Mount an existing secret containing the key `webConfig.yaml`.                                                                                                                          | `false` |
+| `config.webConfig.existingSecret.enabled`         | Mount an existing secret containing the key `webConfig.yaml`.                                                                                                                                                                        | `false` |
-| `config.webConfig.existingSecret.secretName`      | Name of the existing secret containing the key `webConfig.yaml`.                                                                                                                       | `""`    |
+| `config.webConfig.existingSecret.secretName`      | Name of the existing secret containing the key `webConfig.yaml`.                                                                                                                                                                     | `""`    |
-| `config.webConfig.secret.annotations`             | Additional annotations of the secret containing the `webConfig.yaml`.                                                                                                                  | `{}`    |
+| `config.webConfig.secret.annotations`             | Additional annotations of the secret containing the `webConfig.yaml`.                                                                                                                                                                | `{}`    |
-| `config.webConfig.secret.labels`                  | Additional labels of the secret containing the `webConfig.yaml`.                                                                                                                       | `{}`    |
+| `config.webConfig.secret.labels`                  | Additional labels of the secret containing the `webConfig.yaml`.                                                                                                                                                                     | `{}`    |
-| `config.webConfig.secret.webConfig`               | Content of the `webConfig.yaml`. Further information can be found [here](https://prometheus.io/docs/prometheus/latest/configuration/https/).                                           | `{}`    |
+| `config.webConfig.secret.webConfig`               | Content of the `webConfig.yaml`. Further [documentation](https://prometheus.io/docs/prometheus/latest/configuration/https/) is available on the official Prometheus website.                                                         | `{}`    |
 
 ### Deployment
 
@@ -248,7 +321,7 @@ deployment:
 | `deployment.replicas`                              | Number of replicas for the postgres-exporter deployment.                                                   | `1`                                     |
 | `deployment.restartPolicy`                         | Restart policy of the postgres-exporter deployment.                                                        | `""`                                    |
 | `deployment.securityContext`                       | Security context of the postgres-exporter deployment.                                                      | `{}`                                    |
-| `deployment.strategy.type`                         | Strategy type - `Recreate` or `Rollingupdate`.                                                             | `Rollingupdate`                         |
+| `deployment.strategy.type`                         | Strategy type - `Recreate` or `RollingUpdate`.                                                             | `RollingUpdate`                         |
 | `deployment.strategy.rollingUpdate.maxSurge`       | The maximum number of pods that can be scheduled above the desired number of pods during a rolling update. | `1`                                     |
 | `deployment.strategy.rollingUpdate.maxUnavailable` | The maximum number of pods that can be unavailable during a rolling update.                                | `1`                                     |
 | `deployment.terminationGracePeriodSeconds`         | How long to wait until forcefully kill the pod.                                                            | `60`                                    |
@@ -283,11 +356,17 @@ deployment:
 | --------------------- | ---------------------- | ----- |
 | `podDisruptionBudget` | Pod disruption budget. | `{}`  |
 
-### Network
+### NetworkPolicies
 
-| Name              | Description                                                                                                        | Value |
+| Name                                  | Description                                                                                           | Value   |
-| ----------------- | ------------------------------------------------------------------------------------------------------------------ | ----- |
+| ------------------------------------- | ----------------------------------------------------------------------------------------------------- | ------- |
-| `networkPolicies` | Deploy network policies based on the used container network interface (CNI) implementation - like calico or weave. | `{}`  |
+| `networkPolicies.enabled`             | Enable network policies in general.                                                                   | `false` |
+| `networkPolicies.default.enabled`     | Enable the network policy for accessing the application by default. For example to scape the metrics. | `false` |
+| `networkPolicies.default.annotations` | Additional network policy annotations.                                                                | `{}`    |
+| `networkPolicies.default.labels`      | Additional network policy labels.                                                                     | `{}`    |
+| `networkPolicies.default.policyTypes` | List of policy types. Supported is ingress, egress or ingress and egress.                             | `[]`    |
+| `networkPolicies.default.egress`      | Concrete egress network policy implementation.                                                        | `[]`    |
+| `networkPolicies.default.ingress`     | Concrete ingress network policy implementation.                                                       | `[]`    |
 
 ### Prometheus
 

package.json

@@ -16,6 +16,6 @@
   "devDependencies": {
     "@bitnami/readme-generator-for-helm": "^2.5.0",
     "markdown-link-check": "^3.13.6",
-    "markdownlint-cli": "^0.44.0"
+    "markdownlint-cli": "^0.45.0"
   }
 }

renovate.json

@@ -1,6 +1,12 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "assignees": [ "volker.raschek" ],
+  "extends": [
+    "local>volker.raschek/renovate-config:default#master",
+    "local>volker.raschek/renovate-config:container#master",
+    "local>volker.raschek/renovate-config:actions#master",
+    "local>volker.raschek/renovate-config:npm#master",
+    "local>volker.raschek/renovate-config:regexp#master"
+  ],
   "customManagers": [
     {
       "fileMatch": [
@@ -25,20 +31,12 @@
       "versioningTemplate": "semver"
     }
   ],
-  "labels": [ "renovate" ],
-  "lockFileMaintenance": {
-    "enabled": true
-  },
   "packageRules": [
     {
-      "addLabels": [ "renovate/automerge", "renovate/npm" ],
+      "addLabels": [
-      "automerge": true,
+        "renovate/automerge",
-      "matchPackageNames": [ "markdownlint-cli", "@bitnami/readme-generator-for-helm" ],
+        "renovate/container"
-      "matchManagers": [ "npm" ],
+      ],
-      "matchUpdateTypes": [ "minor", "patch"]
-    },
-    {
-      "addLabels": [ "renovate/automerge", "renovate/container" ],
       "automerge": true,
       "excludePackagePatterns": [
         "prometheuscommunity/postgres-exporter"
@@ -52,7 +50,10 @@
       ]
     },
     {
-      "addLabels": [ "renovate/automerge", "renovate/documentation" ],
+      "addLabels": [
+        "renovate/automerge",
+        "renovate/documentation"
+      ],
       "automerge": true,
       "matchDepNames": [
         "volker.raschek/prometheus-postgres-exporter"
@@ -63,7 +64,5 @@
         "patch"
       ]
     }
-  ],
+  ]
-  "rebaseLabel": "renovate/rebase",
-  "rebaseWhen": "behind-base-branch"
 }

templates/prometheus-postgres-exporter/_deployment.tpl

@@ -7,6 +7,37 @@
 {{- if .Values.deployment.annotations }}
 {{ toYaml .Values.deployment.annotations }}
 {{- end }}
+
+# The following annotations are required to trigger a rolling update. Further information can be found in the official
+# documentation of helm:
+#
+#   https://helm.sh/docs/howto/charts_tips_and_tricks/#automatically-roll-deployments
+#
+
+{{/* database */}}
+{{- if and .Values.config.database.existingSecret.enabled .Values.config.database.existingSecret.secretName }}
+{{- $secret := default (dict "data" (dict)) (lookup "v1" "Secret" .Release.Namespace .Values.config.database.existingSecret.secretName ) }}
+checksum/secret-database: {{ print $secret.spec | sha256sum }}
+{{- else }}
+checksum/secret-database: {{ include (print $.Template.BasePath "/prometheus-postgres-exporter/secretDatabase.yaml") . | sha256sum }}
+{{- end }}
+
+{{/* exporter config */}}
+{{- if and .Values.config.exporterConfig.existingSecret.enabled .Values.config.exporterConfig.existingSecret.secretName }}
+{{- $secret := default (dict "data" (dict)) (lookup "v1" "Secret" .Release.Namespace .Values.config.exporterConfig.existingSecret.secretName ) }}
+checksum/secret-exporter-config: {{ print $secret.spec | sha256sum }}
+{{- else }}
+checksum/secret-exporter-config: {{ include (print $.Template.BasePath "/prometheus-postgres-exporter/secretExporterConfig.yaml") . | sha256sum }}
+{{- end }}
+
+{{/* web config */}}
+{{- if and .Values.config.webConfig.existingSecret.enabled .Values.config.webConfig.existingSecret.secretName }}
+{{- $secret := default (dict "data" (dict)) (lookup "v1" "Secret" .Release.Namespace .Values.config.webConfig.existingSecret.secretName ) }}
+checksum/secret-web-config: {{ print $secret.spec | sha256sum }}
+{{- else }}
+checksum/secret-web-config: {{ include (print $.Template.BasePath "/prometheus-postgres-exporter/secretWebConfig.yaml") . | sha256sum }}
+{{- end }}
+
 {{- end }}
 
 {{/* env */}}

templates/prometheus-postgres-exporter/_networkPolicies.tpl

@@ -0,0 +1,19 @@
+{{/* vim: set filetype=mustache: */}}
+
+{{/* annotations */}}
+
+{{- define "prometheus-postgres-exporter.networkPolicies.annotations" -}}
+{{ include "prometheus-postgres-exporter.annotations" .context }}
+{{- if .networkPolicy.annotations }}
+{{ toYaml .networkPolicy.annotations }}
+{{- end }}
+{{- end }}
+
+{{/* labels */}}
+
+{{- define "prometheus-postgres-exporter.networkPolicies.labels" -}}
+{{ include "prometheus-postgres-exporter.labels" .context }}
+{{- if .networkPolicy.labels }}
+{{ toYaml .networkPolicy.labels }}
+{{- end }}
+{{- end }}

templates/prometheus-postgres-exporter/configMapGrafanaDashboardPostgresExporter.yaml

@@ -5,7 +5,7 @@ kind: ConfigMap
 metadata:
   {{- with (include "prometheus-postgres-exporter.configMap.grafanaDashboards.postgresExporter.annotations" . | fromYaml) }}
   annotations:
-    {{- tpl (. | toYaml) $ | nindent 4 }}
+    {{- tpl (toYaml .) $ | nindent 4 }}
   {{- end }}
   {{- with (include "prometheus-postgres-exporter.configMap.grafanaDashboards.postgresExporter.labels" . | fromYaml) }}
   labels:

templates/prometheus-postgres-exporter/deployment.yaml

@@ -3,7 +3,7 @@ kind: Deployment
 metadata:
   {{- with (include "prometheus-postgres-exporter.deployment.annotations" . | fromYaml) }}
   annotations:
-    {{- tpl (. | toYaml) $ | nindent 4 }}
+    {{- tpl (toYaml .) $ | nindent 4 }}
   {{- end }}
   {{- with (include "prometheus-postgres-exporter.deployment.labels" . | fromYaml) }}
   labels:

templates/prometheus-postgres-exporter/ingress.yaml

@@ -5,7 +5,7 @@ kind: Ingress
 metadata:
   {{- with (include "prometheus-postgres-exporter.ingress.annotations" . | fromYaml) }}
   annotations:
-    {{- tpl (. | toYaml) $ | nindent 4 }}
+    {{- tpl (toYaml .) $ | nindent 4 }}
   {{- end }}
   {{- with (include "prometheus-postgres-exporter.ingress.labels" . | fromYaml) }}
   labels:

templates/prometheus-postgres-exporter/networkPolicies.yaml

@@ -0,0 +1,36 @@
+{{- if .Values.networkPolicies.enabled }}
+{{- range $key, $value := .Values.networkPolicies -}}
+{{- if and (not (eq $key "enabled")) $value.enabled }}
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  {{- with (include "prometheus-postgres-exporter.networkPolicies.annotations" (dict "networkPolicy" $value "context" $) | fromYaml) }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+  {{- with (include "prometheus-postgres-exporter.networkPolicies.labels" (dict "networkPolicy" $value "context" $) | fromYaml) }}
+  labels:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+  name: {{ printf "%s-%s" (include "prometheus-postgres-exporter.fullname" $ ) $key }}
+  namespace: {{ $.Release.Namespace }}
+spec:
+  podSelector:
+    matchLabels:
+      {{- include "prometheus-postgres-exporter.pod.selectorLabels" $ | nindent 6 }}
+  {{- with $value.policyTypes }}
+  policyTypes:
+  {{- toYaml . | nindent 2 }}
+  {{- end }}
+  {{- with $value.egress }}
+  egress:
+  {{- toYaml . | nindent 2 }}
+  {{- end }}
+  {{- with $value.ingress }}
+  ingress:
+  {{- toYaml . | nindent 2 }}
+  {{- end }}
+{{- end }}
+{{- end }}
+{{- end }}

unittests/deployment/deployment.yaml

@@ -7,18 +7,35 @@ release:
   namespace: testing
 templates:
 - templates/prometheus-postgres-exporter/deployment.yaml
+- templates/prometheus-postgres-exporter/secretDatabase.yaml
+- templates/prometheus-postgres-exporter/secretExporterConfig.yaml
+- templates/prometheus-postgres-exporter/secretWebConfig.yaml
 tests:
 - it: Rendering default
+  set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
   asserts:
   - hasDocuments:
       count: 1
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - containsDocument:
       apiVersion: apps/v1
       kind: Deployment
       name: prometheus-postgres-exporter-unittest
       namespace: testing
-  - notExists:
+    template: templates/prometheus-postgres-exporter/deployment.yaml
-      path: metadata.annotations
+  - exists:
+      path: metadata.annotations.checksum/secret-database
+    template: templates/prometheus-postgres-exporter/deployment.yaml
+  - exists:
+      path: metadata.annotations.checksum/secret-exporter-config
+    template: templates/prometheus-postgres-exporter/deployment.yaml
+  - exists:
+      path: metadata.annotations.checksum/secret-web-config
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: metadata.labels
       value:
@@ -27,27 +44,33 @@ tests:
         app.kubernetes.io/name: prometheus-postgres-exporter
         app.kubernetes.io/version: 0.1.0
         helm.sh/chart: prometheus-postgres-exporter-0.1.0
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.replicas
       value: 1
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.affinity
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - contains:
       path: spec.template.spec.containers[0].envFrom
       content:
         secretRef:
           name: prometheus-postgres-exporter-unittest-database-env
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.containers[0].args
       value:
       - --config.file=/etc/prometheus-postgres-exporter/config.d/exporterConfig.yaml
       - --web.config.file=/etc/prometheus-postgres-exporter/config.d/webConfig.yaml
       - --web.listen-address=:9187
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.containers[0].volumeMounts
       value:
       - mountPath: /etc/prometheus-postgres-exporter/config.d
         name: config-d
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.volumes
       value:
@@ -59,60 +82,91 @@ tests:
               name: prometheus-postgres-exporter-unittest-exporter-config
           - secret:
               name: prometheus-postgres-exporter-unittest-web-config
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.containers[0].image
       value: quay.io/prometheuscommunity/postgres-exporter:v0.1.0
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.containers[0].imagePullPolicy
       value: IfNotPresent
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.containers[0].resources
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.containers[0].securityContext
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.dnsConfig
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.dnsPolicy
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.hostname
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.hostNetwork
       value: false
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.imagePullSecrets
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.nodeSelector
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.priorityClassName
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.restartPolicy
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.subdomain
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.terminationGracePeriodSeconds
       value: 60
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.tolerations
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - notExists:
       path: spec.template.spec.topologySpreadConstraints
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.strategy
       value:
-        type: "Rollingupdate"
+        type: "RollingUpdate"
         rollingUpdate:
           maxSurge: 1
           maxUnavailable: 1
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test custom replicas
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.replicas: 3
   asserts:
   - equal:
       path: spec.replicas
       value: 3
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test custom affinity
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.affinity:
       nodeAffinity:
         requiredDuringSchedulingIgnoredDuringExecution:
@@ -136,9 +190,16 @@ tests:
                 values:
                 - antarctica-east1
                 - antarctica-west1
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test additional arguments
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.postgresExporter.args:
     - "--foo=bar"
     - "--bar=foo"
@@ -151,26 +212,42 @@ tests:
       - --web.listen-address=:9187
       - --foo=bar
       - --bar=foo
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test custom imageRegistry and imageRepository
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.postgresExporter.image.registry: registry.example.local
     deployment.postgresExporter.image.repository: path/special/prometheus-postgres-exporter
   asserts:
   - equal:
       path: spec.template.spec.containers[0].image
       value: registry.example.local/path/special/prometheus-postgres-exporter:v0.1.0
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test custom imagePullPolicy
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.postgresExporter.image.pullPolicy: Always
   asserts:
   - equal:
       path: spec.template.spec.containers[0].imagePullPolicy
       value: Always
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test config.database.existingSecret
   set:
+    # Normal test values
     config.database.existingSecret.enabled: true
     config.database.existingSecret.secretName: custom-database-secret
   asserts:
@@ -179,9 +256,16 @@ tests:
       content:
         secretRef:
           name: custom-database-secret
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test config.exporterConfig.existingSecret
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     config.exporterConfig.existingSecret.enabled: true
     config.exporterConfig.existingSecret.secretName: exporter-config-secret
   asserts:
@@ -190,6 +274,7 @@ tests:
       value:
       - mountPath: /etc/prometheus-postgres-exporter/config.d
         name: config-d
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.volumes
       value:
@@ -201,9 +286,16 @@ tests:
               name: exporter-config-secret
           - secret:
               name: prometheus-postgres-exporter-unittest-web-config
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test config.webConfig.existingSecret
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     config.webConfig.existingSecret.enabled: true
     config.webConfig.existingSecret.secretName: web-config-secret
   asserts:
@@ -212,6 +304,7 @@ tests:
       value:
       - mountPath: /etc/prometheus-postgres-exporter/config.d
         name: config-d
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.volumes
       value:
@@ -223,9 +316,16 @@ tests:
               name: prometheus-postgres-exporter-unittest-exporter-config
           - secret:
               name: web-config-secret
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test custom resource limits and requests
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.postgresExporter.resources:
       limits:
         cpu: 100m
@@ -242,6 +342,7 @@ tests:
           resourceFieldRef:
             divisor: "1"
             resource: limits.cpu
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.containers[0].resources
       value:
@@ -251,9 +352,16 @@ tests:
         requests:
           cpu: 25m
           memory: 100MB
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test custom securityContext
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.postgresExporter.securityContext:
       capabilities:
         add:
@@ -277,9 +385,16 @@ tests:
         readOnlyRootFilesystem: true
         runAsNonRoot: true
         runAsUser: 1000
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test dnsConfig
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.dnsConfig:
       nameservers:
       - "8.8.8.8"
@@ -291,17 +406,31 @@ tests:
         nameservers:
         - "8.8.8.8"
         - "8.8.4.4"
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test dnsPolicy
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.dnsPolicy: ClusterFirst
   asserts:
   - equal:
       path: spec.template.spec.dnsPolicy
       value: ClusterFirst
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test hostNetwork, hostname, subdomain
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.hostNetwork: true
     deployment.hostname: pg-exporter
     deployment.subdomain: exporters.internal
@@ -309,15 +438,24 @@ tests:
   - equal:
       path: spec.template.spec.hostNetwork
       value: true
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.hostname
       value: pg-exporter
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.subdomain
       value: exporters.internal
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test imagePullSecrets
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.imagePullSecrets:
     - name: my-pull-secret
     - name: my-special-secret
@@ -327,9 +465,16 @@ tests:
       value:
       - name: my-pull-secret
       - name: my-special-secret
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test nodeSelector
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.nodeSelector:
       foo: bar
   asserts:
@@ -337,33 +482,61 @@ tests:
       path: spec.template.spec.nodeSelector
       value:
         foo: bar
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test priorityClassName
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.priorityClassName: my-priority
   asserts:
   - equal:
       path: spec.template.spec.priorityClassName
       value: my-priority
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test restartPolicy
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.restartPolicy: Always
   asserts:
   - equal:
       path: spec.template.spec.restartPolicy
       value: Always
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test terminationGracePeriodSeconds
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.terminationGracePeriodSeconds: 120
   asserts:
   - equal:
       path: spec.template.spec.terminationGracePeriodSeconds
       value: 120
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test tolerations
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.tolerations:
     - key: database/type
       operator: Equal
@@ -377,9 +550,16 @@ tests:
         operator: Equal
         value: postgres
         effect: NoSchedule
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test topologySpreadConstraints
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.topologySpreadConstraints:
     - topologyKey: kubernetes.io/hostname
       whenUnsatisfiable: DoNotSchedule
@@ -395,9 +575,16 @@ tests:
         labelSelector:
           matchLabels:
             app.kubernetes.io/instance: prometheus-postgres-exporter
+    template: templates/prometheus-postgres-exporter/deployment.yaml
 
 - it: Test additional volumeMounts and volumes
   set:
+    # Ensure that the secrets and config maps are well configured.
+    config.database.secret.databaseUsername: "postgres"
+    config.database.secret.databasePassword: "postgres"
+    config.database.secret.databaseConnectionUrl: "localhost:5432/postgres?sslmode=disable"
+
+    # Normal test values
     deployment.postgresExporter.volumeMounts:
     - name: data
       mountPath: /usr/lib/prometheus-postgres-exporter/data
@@ -413,6 +600,7 @@ tests:
         mountPath: /usr/lib/prometheus-postgres-exporter/data
       - name: config-d
         mountPath: /etc/prometheus-postgres-exporter/config.d
+    template: templates/prometheus-postgres-exporter/deployment.yaml
   - equal:
       path: spec.template.spec.volumes
       value:
@@ -426,4 +614,5 @@ tests:
           - secret:
               name: prometheus-postgres-exporter-unittest-exporter-config
           - secret:
-              name: prometheus-postgres-exporter-unittest-web-config
+              name: prometheus-postgres-exporter-unittest-web-config
+    template: templates/prometheus-postgres-exporter/deployment.yaml

unittests/networkPolicies/default.yaml

@@ -0,0 +1,118 @@
+chart:
+  appVersion: 0.1.0
+  version: 0.1.0
+suite: NetworkPolicies template (basic)
+release:
+  name: prometheus-postgres-exporter-unittest
+  namespace: testing
+templates:
+- templates/prometheus-postgres-exporter/networkPolicies.yaml
+tests:
+- it: Skip networkPolicies in general disabled.
+  set:
+    networkPolicies.enabled: false
+  asserts:
+  - hasDocuments:
+      count: 0
+
+- it: Skip networkPolicy 'default' when disabled.
+  set:
+    networkPolicies.enabled: true
+    networkPolicies.default.enabled: false
+  asserts:
+  - hasDocuments:
+      count: 0
+
+- it: Loop over networkPolicies
+  set:
+    networkPolicies.enabled: true
+    networkPolicies.default.enabled: false
+    networkPolicies.nginx.enabled: true
+    networkPolicies.prometheus.enabled: true
+  asserts:
+  - hasDocuments:
+      count: 2
+
+- it: Template networkPolicy 'default' without policyTypes, egress and ingress configuration
+  set:
+    networkPolicies.enabled: true
+    networkPolicies.default.enabled: true
+  asserts:
+  - hasDocuments:
+      count: 1
+  - containsDocument:
+      apiVersion: networking.k8s.io/v1
+      kind: NetworkPolicy
+      name: prometheus-postgres-exporter-unittest-default
+      namespace: testing
+  - notExists:
+      path: metadata.annotations
+  - equal:
+      path: metadata.labels
+      value:
+        app.kubernetes.io/instance: prometheus-postgres-exporter-unittest
+        app.kubernetes.io/managed-by: Helm
+        app.kubernetes.io/name: prometheus-postgres-exporter
+        app.kubernetes.io/version: 0.1.0
+        helm.sh/chart: prometheus-postgres-exporter-0.1.0
+  - equal:
+      path: spec.podSelector.matchLabels
+      value:
+        app.kubernetes.io/instance: prometheus-postgres-exporter-unittest
+        app.kubernetes.io/name: prometheus-postgres-exporter
+  - notExists:
+      path: spec.policyTypes
+  - notExists:
+      path: spec.egress
+  - notExists:
+      path: spec.ingress
+
+- it: Template networkPolicy 'default' with policyTypes, egress and ingress configuration
+  set:
+    networkPolicies.enabled: true
+    networkPolicies.default.enabled: true
+    networkPolicies.default.policyTypes:
+    - Egress
+    - Ingress
+    networkPolicies.default.ingress:
+    - from:
+      - namespaceSelector:
+          matchLabels:
+            kubernetes.io/metadata.name: khv-production
+        podSelector:
+          matchLabels:
+            app.kubernetes.io/name: prometheus
+    networkPolicies.default.egress:
+    - to:
+      - namespaceSelector:
+          matchLabels:
+            kubernetes.io/metadata.name: database
+        podSelector:
+          matchLabels:
+            app.kubernetes.io/name: oracle
+  asserts:
+  - equal:
+      path: spec.policyTypes
+      value:
+      - Egress
+      - Ingress
+  - equal:
+      path: spec.egress
+      value:
+      - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: database
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: oracle
+  - equal:
+      path: spec.ingress
+      value:
+      - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: khv-production
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: prometheus

values.yaml

@@ -35,7 +35,7 @@ config:
 
     ## @param config.exporterConfig.secret.annotations Additional annotations of the secret containing the `exporterConfig.yaml`.
     ## @param config.exporterConfig.secret.labels Additional labels of the secret containing the `exporterConfig.yaml`.
-    ## @param config.exporterConfig.secret.exporterConfig Content of the `exporterConfig.yaml`. Further information can be found [here](https://github.com/prometheus-community/postgres_exporter?tab=readme-ov-file#multi-target-support-beta).
+    ## @param config.exporterConfig.secret.exporterConfig Content of the `exporterConfig.yaml`. Further information can be found in the [README](https://github.com/prometheus-community/postgres_exporter?tab=readme-ov-file#multi-target-support-beta) file of the Postgres exporter binary.
     ## @skip config.exporterConfig.secret.exporterConfig Skip individual postgres exporter configuration.
     secret:
       annotations: {}
@@ -59,7 +59,7 @@ config:
 
     ## @param config.webConfig.secret.annotations Additional annotations of the secret containing the `webConfig.yaml`.
     ## @param config.webConfig.secret.labels Additional labels of the secret containing the `webConfig.yaml`.
-    ## @param config.webConfig.secret.webConfig Content of the `webConfig.yaml`. Further information can be found [here](https://prometheus.io/docs/prometheus/latest/configuration/https/).
+    ## @param config.webConfig.secret.webConfig Content of the `webConfig.yaml`. Further [documentation](https://prometheus.io/docs/prometheus/latest/configuration/https/) is available on the official Prometheus website.
     ## @skip config.webConfig.secret.webConfig Skip individual web configuration.
     secret:
       annotations: {}
@@ -224,11 +224,11 @@ deployment:
   securityContext: {}
     # fsGroup: 2000
 
-  ## @param deployment.strategy.type Strategy type - `Recreate` or `Rollingupdate`.
+  ## @param deployment.strategy.type Strategy type - `Recreate` or `RollingUpdate`.
   ## @param deployment.strategy.rollingUpdate.maxSurge The maximum number of pods that can be scheduled above the desired number of pods during a rolling update.
   ## @param deployment.strategy.rollingUpdate.maxUnavailable The maximum number of pods that can be unavailable during a rolling update.
   strategy:
-    type: "Rollingupdate"
+    type: "RollingUpdate"
     rollingUpdate:
       maxSurge: 1
       maxUnavailable: 1
@@ -311,9 +311,77 @@ podDisruptionBudget: {}
 #  maxUnavailable: 1
 #  minAvailable: 1
 
-## @section Network
+## @section NetworkPolicies
-## @param networkPolicies Deploy network policies based on the used container network interface (CNI) implementation - like calico or weave.
+## @param networkPolicies.enabled Enable network policies in general.
-networkPolicies: {}
+networkPolicies:
+  enabled: false
+
+  ## @param networkPolicies.default.enabled Enable the network policy for accessing the application by default. For example to scape the metrics.
+  ## @param networkPolicies.default.annotations Additional network policy annotations.
+  ## @param networkPolicies.default.labels Additional network policy labels.
+  ## @param networkPolicies.default.policyTypes List of policy types. Supported is ingress, egress or ingress and egress.
+  ## @param networkPolicies.default.egress Concrete egress network policy implementation.
+  ## @skip networkPolicies.default.egress Skip individual egress configuration.
+  ## @param networkPolicies.default.ingress Concrete ingress network policy implementation.
+  ## @skip networkPolicies.default.ingress Skip individual ingress configuration.
+  default:
+    enabled: false
+    annotations: {}
+    labels: {}
+    policyTypes: []
+    # - Egress
+    # - Ingress
+    egress: []
+    # Allow outgoing traffic to database host
+    #
+    # - to:
+    #   - ipBlock:
+    #       cidr: 192.168.179.1/32
+    #   ports:
+    #   - port: 5432
+    #     protocol: TCP
+
+    # Allow outgoing DNS traffic to the internal running DNS-Server. For example core-dns.
+    #
+    # - to:
+    #   - namespaceSelector:
+    #       matchLabels:
+    #         kubernetes.io/metadata.name: kube-system
+    #     podSelector:
+    #       matchLabels:
+    #        k8s-app: kube-dns
+    #   ports:
+    #   - port: 53
+    #     protocol: TCP
+    #   - port: 53
+    #     protocol: UDP
+
+    ingress: []
+    # Allow incoming HTTP traffic from prometheus.
+    #
+    # - from:
+    #   - namespaceSelector:
+    #       matchLabels:
+    #         kubernetes.io/metadata.name: monitoring
+    #     podSelector:
+    #       matchLabels:
+    #         app.kubernetes.io/name: prometheus
+    #   ports:
+    #   - port: http
+    #     protocol: TCP
+
+    # Allow incoming HTTP traffic from ingress-nginx.
+    #
+    # - from:
+    #   - namespaceSelector:
+    #       matchLabels:
+    #         kubernetes.io/metadata.name: ingress-nginx
+    #     podSelector:
+    #       matchLabels:
+    #         app.kubernetes.io/name: ingress-nginx
+    #   ports:
+    #   - port: http
+    #     protocol: TCP
 
 ## @section Prometheus
 prometheus: