fix

.drone.yml

@@ -0,0 +1,200 @@
+---
+kind: pipeline
+type: kubernetes
+name: Linters
+
+clone:
+  disable: true
+
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+- name: clone repository
+  image: git.cryptic.systems/volker.raschek/git:1.4.0
+
+- name: helm lint
+  commands:
+  - helm lint
+  image: git.cryptic.systems/volker.raschek/helm:3.16.4
+  resources:
+    limits:
+      cpu: 150
+      memory: 150M
+
+- name: email-notification
+  environment:
+    SMTP_FROM_ADDRESS:
+      from_secret: smtp_from_address
+    SMTP_FROM_NAME:
+      from_secret: smtp_from_name
+    SMTP_HOST:
+      from_secret: smtp_host
+    SMTP_USERNAME:
+      from_secret: smtp_username
+    SMTP_PASSWORD:
+      from_secret: smtp_password
+  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
+  resources:
+    limits:
+      cpu: 150
+      memory: 150M
+  when:
+    status:
+    - changed
+    - failure
+
+trigger:
+  event:
+    exclude:
+    - tag
+
+---
+kind: pipeline
+type: kubernetes
+name: Unit tests
+
+clone:
+  disable: true
+
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+- name: clone repository
+  image: git.cryptic.systems/volker.raschek/git:1.4.0
+
+- name: helm unittest
+  commands:
+  - helm unittest --strict --file 'unittests/**/*.yaml' ./
+  image: git.cryptic.systems/volker.raschek/helm:3.16.4
+  resources:
+    limits:
+      cpu: 150
+      memory: 150M
+
+- name: email-notification
+  environment:
+    SMTP_FROM_ADDRESS:
+      from_secret: smtp_from_address
+    SMTP_FROM_NAME:
+      from_secret: smtp_from_name
+    SMTP_HOST:
+      from_secret: smtp_host
+    SMTP_USERNAME:
+      from_secret: smtp_username
+    SMTP_PASSWORD:
+      from_secret: smtp_password
+  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
+  resources:
+    limits:
+      cpu: 150
+      memory: 150M
+  when:
+    status:
+    - changed
+    - failure
+
+trigger:
+  event:
+    exclude:
+    - tag
+
+---
+kind: pipeline
+type: kubernetes
+name: Generate, compare and lint README.md
+
+clone:
+  disable: true
+
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+- name: clone repository
+  image: git.cryptic.systems/volker.raschek/git:1.4.0
+
+- name: execute NPM modules
+  commands:
+  - npm install
+  - npm run readme:link
+  - npm run readme:lint
+  - npm run readme:parameters
+  image: docker.io/library/node:23.5.0-alpine
+  resources:
+    limits:
+      cpu: 150
+      memory: 150M
+
+- name: detect diff
+  commands:
+  - git diff --exit-code --name-only README.md
+  image: git.cryptic.systems/volker.raschek/git:1.4.0
+
+- name: email-notification
+  environment:
+    SMTP_FROM_ADDRESS:
+      from_secret: smtp_from_address
+    SMTP_FROM_NAME:
+      from_secret: smtp_from_name
+    SMTP_HOST:
+      from_secret: smtp_host
+    SMTP_USERNAME:
+      from_secret: smtp_username
+    SMTP_PASSWORD:
+      from_secret: smtp_password
+  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
+  resources:
+    limits:
+      cpu: 150
+      memory: 150M
+  when:
+    status:
+    - changed
+    - failure
+
+trigger:
+  event:
+    exclude:
+    - tag
+
+---
+kind: pipeline
+type: kubernetes
+name: Release
+
+clone:
+  disable: true
+
+platform:
+  os: linux
+
+steps:
+- name: clone repository
+  image: git.cryptic.systems/volker.raschek/git:1.4.0
+
+- name: release-helm-chart
+  commands:
+  - helm repo add prometheus-exporters https://charts.cryptic.systems/prometheus-exporters
+  - helm package --version ${DRONE_TAG} .
+  - helm cm-push ${DRONE_REPO_NAME}-${DRONE_TAG}.tgz prometheus-exporters
+  environment:
+    HELM_REPO_PASSWORD:
+      from_secret: helm_repo_password
+    HELM_REPO_USERNAME:
+      from_secret: helm_repo_username
+  image: git.cryptic.systems/volker.raschek/helm:3.16.4
+  resources:
+    limits:
+      cpu: 150
+      memory: 150M
+
+trigger:
+  event:
+  - tag
+  repo:
+  - volker.raschek/prometheus-postgres-exporter

.gitea/workflows/generate-readme.yaml

@@ -1,30 +0,0 @@
-name: Generate README
-
-on:
-  pull_request:
-    paths: [ "README.md", "values.yaml" ]
-    types: [ "opened", "reopened", "synchronize" ]
-  push:
-    paths: [ "README.md", "values.yaml" ]
-    tags-ignore:
-    - '**'
-  workflow_dispatch: {}
-
-jobs:
-  generate-parameters:
-    container:
-      image: docker.io/library/node:22.13.0-alpine
-    runs-on:
-    - ubuntu-latest
-    steps:
-    - name: Install tooling
-      run: |
-        apk update
-        apk add git npm
-    - uses: actions/checkout@v4.2.2
-    - name: Generate parameter section in README
-      run: |
-        npm install
-        npm run readme:parameters
-    - name: Compare diff
-      run: git diff --exit-code --name-only README.md

.gitea/workflows/helm.yaml

@@ -1,40 +0,0 @@
-name: Helm
-
-on:
-  pull_request:
-    types: [ "opened", "reopened", "synchronize" ]
-  push:
-    tags-ignore:
-    - '**'
-  workflow_dispatch: {}
-
-jobs:
-  helm-lint:
-    container:
-      image: docker.io/volkerraschek/helm:3.16.4
-    runs-on:
-    - ubuntu-latest
-    steps:
-    - name: Install tooling
-      run: |
-        apk update
-        apk add git npm
-    - uses: actions/checkout@v4.2.2
-    - name: Lint helm files
-      run: |
-        helm lint --values values.yaml .
-
-  helm-unittest:
-    container:
-      image: docker.io/volkerraschek/helm:3.16.4
-    runs-on:
-    - ubuntu-latest
-    steps:
-    - name: Install tooling
-      run: |
-        apk update
-        apk add git npm
-    - uses: actions/checkout@v4.2.2
-    - name: Unittest
-      run: |
-        helm unittest --strict --file 'unittests/**/*.yaml' ./

.gitea/workflows/markdown-linters.yaml

@@ -1,44 +1,24 @@
 name: Markdown linter
 
 on:
-  pull_request:
-    paths: [ "**/*.md" ]
-    types: [ "opened", "reopened", "synchronize" ]
-  push:
-    paths: [ "**/*.md" ]
-    tags-ignore:
-    - '**'
+  # pull_request:
+  #   paths: [ "**/*.md" ]
+  #   types: [ "opened", "reopened", "synchronize" ]
+  push: {}
+    # paths: [ "**/*.md" ]
   workflow_dispatch: {}
 
 jobs:
   markdown-link-checker:
     container:
-      image: docker.io/library/node:22.13.0-alpine
+      image: docker.io/library/node:22.9.0-alpine
+      # options: --entrypoint /bin/sh
     runs-on:
     - ubuntu-latest
     steps:
-    - name: Install tooling
-      run: |
-        apk update
-        apk add git npm
-    - uses: actions/checkout@v4.2.2
-    - name: Verify links in markdown files
-      run: |
-        npm install
-        npm run readme:link
-
-  markdown-lint:
-    container:
-      image: docker.io/library/node:22.13.0-alpine
-    runs-on:
-    - ubuntu-latest
-    steps:
-    - name: Install tooling
-      run: |
+    - run: |
         apk update
         apk add git
     - uses: actions/checkout@v4.2.2
-    - name: Lint markdown files
-      run: |
-        npm install
-        npm run readme:lint
+    - name: Verify links in markdown files
+      run: npm install && npm run readme:link

.gitea/workflows/release.yaml

@@ -1,46 +0,0 @@
-name: Release
-
-on:
-  push:
-    tags:
-    - "**"
-
-jobs:
-  publish-chart:
-    container:
-      image: docker.io/volkerraschek/helm:3.16.4
-    runs-on: ubuntu-latest
-    steps:
-      - name: Install tooling
-        run: |
-          apk update
-          apk add git npm
-      - uses: actions/checkout@v4
-      - name: Package chart
-        env:
-          HELM_REPO_NAME: upload
-
-          CHARTMUSEUM_PASSWORD: ${{ secrets.CHARTMUSEUM_PASSWORD }}
-          CHARTMUSEUM_REPOSITORY: ${{ vars.CHARTMUSEUM_REPOSITORY }}
-          CHARTMUSEUM_USERNAME: ${{ secrets.CHARTMUSEUM_USERNAME }}
-          CHARTMUSEUM_HOSTNAME: ${{ vars.CHARTMUSEUM_HOSTNAME }}
-
-          GITEA_PACKAGE_REGISTRY_TOKEN: ${{ secrets.GIT_CRYPTIC_SYSTEMS_PACKAGE_REGISTRY_TOKEN }}
-          GITEA_SERVER_URL: ${{ github.server_url }}
-        run: |
-          PACKAGE_VERSION=${GITHUB_REF#refs/tags/}
-          REPOSITORY_NAME=$(echo ${GITHUB_REPOSITORY} | cut -d '/' -f 2)
-          REPOSITORY_OWNER=$(echo ${GITHUB_REPOSITORY} | cut -d '/' -f 1)
-
-          helm dependency build
-          helm package --version "${PACKAGE_VERSION}" ./
-
-          # chart-museum
-          helm repo add --username ${CHARTMUSEUM_USERNAME} --password ${CHARTMUSEUM_PASSWORD} chartmuseum https://${CHARTMUSEUM_HOSTNAME}/${CHARTMUSEUM_REPOSITORY}
-          helm cm-push ${REPOSITORY_NAME}-${PACKAGE_VERSION}.tgz chartmuseum
-          helm repo remove chartmuseum
-
-          # gitea
-          helm repo add --username ${REPOSITORY_OWNER} --password ${GITEA_PACKAGE_REGISTRY_TOKEN} gitea ${GITEA_SERVER_URL}/api/packages/${REPOSITORY_OWNER}/helm
-          helm cm-push ${REPOSITORY_NAME}-${PACKAGE_VERSION}.tgz gitea
-          helm repo remove gitea

README.md

@@ -63,35 +63,6 @@ for customizations. These can be configured in more detail via `values.yaml`.
 
 The following examples serve as individual configurations and as inspiration for how deployment problems can be solved.
 
-#### Avoid CPU throttling by defining a CPU limit
-
-If the application is deployed with a CPU resource limit, Prometheus may throw a CPU throttling warning for the
-application. This has more or less to do with the fact that the application finds the number of CPUs of the host, but
-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
-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/).
-
-> [!NOTE]
-> The environment variable `GOMAXPROCS` is set automatically, when a CPU limit is defined. An explicit configuration is
-> not anymore required.
-
-```bash
-helm install prometheus-postgres-exporter prometheus-exporters/prometheus-postgres-exporter \
-  --set 'config.database.secret.databaseUsername=postgres' \
-  --set 'config.database.secret.databasePassword=postgres' \
-  --set 'config.database.secret.databaseConnectionUrl="postgres.example.local:5432/postgres?ssl=disable"' \
-  --set 'prometheus.metrics.enabled=true' \
-  --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'
-```
-
 #### TLS authentication and encryption
 
 The first example shows how to deploy the metric exporter with TLS encryption. The verification of the custom TLS

renovate.json

@@ -17,50 +17,32 @@
     },
     {
       "description": "Detect helm chart version in README",
-      "fileMatch": ["^README\\.md$"],
+      "fileMatch": [
+        "^README\\.md$"
+      ],
       "matchStrings": [
         "^CHART_VERSION=(?<currentValue>.*)$"
       ],
       "datasourceTemplate": "git-tags",
       "depNameTemplate": "volker.raschek/prometheus-postgres-exporter",
-      "packageNameTemplate": "https://git.cryptic.systems/volker.raschek/prometheus-postgres-exporter",
+      "packageNameTemplate": "git.cryptic.systems/volker.raschek/prometheus-postgres-exporter",
       "versioningTemplate": "semver"
     }
   ],
   "labels": [ "renovate" ],
   "packageRules": [
+    {
+      "addLabels": [ "renovate/automerge", "renovate/droneci" ],
+      "automerge": true,
+      "matchManagers": "droneci",
+      "matchUpdateTypes": [ "minor", "patch"]
+    },
     {
       "addLabels": [ "renovate/automerge", "renovate/npm" ],
       "automerge": true,
       "matchPackageNames": [ "markdownlint-cli", "@bitnami/readme-generator-for-helm" ],
       "matchManagers": [ "npm" ],
       "matchUpdateTypes": [ "minor", "patch"]
-    },
-    {
-      "addLabels": [ "renovate/automerge", "renovate/container" ],
-      "automerge": true,
-      "excludePackagePatterns": [
-        "prometheuscommunity/postgres-exporter"
-      ],
-      "matchDatasources": [
-        "docker"
-      ],
-      "matchUpdateTypes": [
-        "minor",
-        "patch"
-      ]
-    },
-    {
-      "addLabels": [ "renovate/automerge", "renovate/documentation" ],
-      "automerge": true,
-      "matchDepNames": [
-        "volker.raschek/prometheus-postgres-exporter"
-      ],
-      "matchUpdateTypes": [
-        "major",
-        "minor",
-        "patch"
-      ]
     }
   ],
   "rebaseLabel": "renovate/rebase",

templates/prometheus-postgres-exporter/_deployment.tpl

@@ -9,17 +9,6 @@
 {{- end }}
 {{- end }}
 
-{{/* env */}}
-
-{{- define "prometheus-postgres-exporter.deployment.env" -}}
-{{- $env := dict "env" (.Values.deployment.postgresExporter.env | default (list) ) }}
-{{- if and (hasKey .Values.deployment.postgresExporter.resources "limits") (hasKey .Values.deployment.postgresExporter.resources.limits "cpu") }}
-{{- $env = merge $env (dict "env" (list (dict "name" "GOMAXPROCS" "valueFrom" (dict "resourceFieldRef" (dict "divisor" "1" "resource" "limits.cpu"))))) }}
-{{- end }}
-{{ toYaml $env }}
-{{- end -}}
-
-
 {{/* envFrom */}}
 
 {{- define "prometheus-postgres-exporter.deployment.envFrom" -}}

templates/prometheus-postgres-exporter/deployment.yaml

@@ -34,10 +34,9 @@ spec:
         {{- range .Values.deployment.postgresExporter.args }}
         - {{ . | quote }}
         {{- end }}
-        {{- $env := (include "prometheus-postgres-exporter.deployment.env" . | fromYaml) }}
-        {{- if and (hasKey $env "env") (gt (len $env.env) 0) }}
+        {{- with .Values.deployment.postgresExporter.env }}
         env:
-        {{- toYaml $env.env | nindent 8 }}
+        {{- toYaml . | nindent 8 }}
         {{- end }}
         {{- $envFrom := (include "prometheus-postgres-exporter.deployment.envFrom" . | fromYaml) }}
         {{- if hasKey $envFrom "envFrom" }}

unittests/deployment/deployment.yaml

@@ -227,14 +227,6 @@ tests:
         cpu: 25m
         memory: 100MB
   asserts:
-  - equal:
-      path: spec.template.spec.containers[0].env
-      value:
-      - name: GOMAXPROCS
-        valueFrom:
-          resourceFieldRef:
-            divisor: "1"
-            resource: limits.cpu
   - equal:
       path: spec.template.spec.containers[0].resources
       value: