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[Feature #884] Helm chart for Kubernetes deployments PR#902 (#971)
* Include the Helm Chart and Kubernetes YAMLs - Includes the Helm chart required for the NeoDash deployment for the Kubernetes clusters - Includes the example YAML files for the Kubernetes manifests - Appropriate document changes to include the new Kubernetes deployments. Signed-off-by: Lolla, Venkata <[email protected]> * Fix the chart notes Signed-off-by: Lolla, Venkata <[email protected]> * Patch a typo in the build-and-run.adoc file Signed-off-by: Lolla, Venkata <[email protected]> * Resolves SonarCloud warning Signed-off-by: Lolla, Venkata <[email protected]> * Review + small fixes, LGTM --------- Signed-off-by: Lolla, Venkata <[email protected]> Co-authored-by: Lolla, Venkata <[email protected]>
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‎docs/modules/ROOT/pages/developer-guide/build-and-run.adoc‎

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@@ -76,7 +76,9 @@ docker run -it –rm -p 5005:5005 neodash
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== Run on Kubernetes
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An example of a pod definition YAML file to create a NeoDash pod in a cluster:
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=== To deploy using YAML files
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YAML examples are available in the https://github.com/neo4j-labs/neodash[NeoDash repository]. Here is an example of a pod definition YAML file to create a NeoDash pod in a cluster:
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apiVersion: v1
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selector:
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project: neodash
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....
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=== To deploy using a Helm Charts
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A Kubernetes Helm chart is available in the https://github.com/neo4j-labs/neodash[the NeoDash repository] and here is the full example of the Helm chart values.yaml file,
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....
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# Name override or full name override
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nameOverride: ''
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fullnameOverride: neodash-test
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# Number of pods
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replicaCount: 1
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# Image Details
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image:
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repository: neo4jlabs/neodash
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pullPolicy: IfNotPresent
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tag: 'latest'
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imagePullSecrets: [] # Image pull secret if any
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# Pod annotations, labels and security context
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podAnnotations: {}
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podLabels: {}
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podSecurityContext: {}
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# Mode configuration using environment variables
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# Set reader mode environment variables when enable_reader_mode is true
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enable_reader_mode: true
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env:
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- name: "ssoEnabled"
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value: "false"
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- name: "standalone"
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value: "true"
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- name: "standaloneProtocol"
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value: "neo4j+s"
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- name: "standaloneHost"
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value: "localhost"
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- name: "standalonePort"
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value: "7687"
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- name: "standaloneDatabase"
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value: neo4j
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- name: "standaloneDashboardName"
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value: "test"
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- name: "standaloneDashboardDatabase"
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value: neo4j
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- name: "standaloneAllowLoad"
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value: "false"
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- name: "standaloneLoadFromOtherDatabases"
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value: "false"
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- name: "standaloneMultiDatabase"
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value: "false"
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# Environment variable from secret
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envFromSecrets: []
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# standaloneUsername:
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# secretName: "neo4j-connection-secrets"
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# key: "username"
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# standalonePassword:
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# secretName: "neo4j-connection-secrets"
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# key: "password"
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# Service details
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service:
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type: LoadBalancer # Can also be ClusterIP or NodePort
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port: 5005 # For the service to listen in for Traffic
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targetPort: 5005 # Target port is the container port
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annotations: {} # Service annotations for the LoadBalance
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# Ingress
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ingress:
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enabled: false # Enable Kubernetes Ingress
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className: 'alb' # Class Name
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annotations: {} # Cloud LoadBalancer annotations
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hosts: []
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# - host: neodash.example.com
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# paths:
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# - path: '/'
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# pathType: Prefix
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tls: []
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# Pod resources request, limits and health check
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resources:
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requests:
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memory: "64Mi"
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cpu: "250m"
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limits:
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memory: "128Mi"
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cpu: "500m"
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livenessProbe:
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httpGet:
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path: /*
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port: 5005
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readinessProbe:
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httpGet:
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path: /*
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port: 5005
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# Pod Autoscaler
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autoscaling:
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enabled: false
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# minReplicas: 1
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# maxReplicas: 100
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# targetCPUUtilizationPercentage: 80
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# Pod Volumes
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volumes: []
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volumeMounts: []
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# Service Account
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serviceAccount:
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create: true
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automount: true
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# annotations: {}
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# name: ''
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....

‎k8s-deploy/neodash/.helmignore‎

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# Patterns to ignore when building packages.
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# This supports shell glob matching, relative path matching, and
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# negation (prefixed with !). Only one pattern per line.
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.DS_Store
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# Common VCS dirs
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.git/
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.gitignore
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.bzr/
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.bzrignore
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.hg/
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.hgignore
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.svn/
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# Common backup files
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*.swp
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*.bak
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*.tmp
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*.orig
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*~
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# Various IDEs
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.project
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.idea/
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*.tmproj
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.vscode/

‎k8s-deploy/neodash/Chart.yaml‎

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apiVersion: v2
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name: neodash
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description: A NeoDash Helm chart for Kubernetes
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# A chart can be either an 'application' or a 'library' chart.
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#
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# Application charts are a collection of templates that can be packaged into versioned archives
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# to be deployed.
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#
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# Library charts provide useful utilities or functions for the chart developer. They're included as
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# a dependency of application charts to inject those utilities and functions into the rendering
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# pipeline. Library charts do not define any templates and therefore cannot be deployed.
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type: application
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# This is the chart version. This version number should be incremented each time you make changes
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# to the chart and its templates, including the app version.
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# Versions are expected to follow Semantic Versioning (https://semver.org/)
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version: 1.0.0
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# This is the version number of the application being deployed. This version number should be
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# incremented each time you make changes to the application. Versions are not expected to
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# follow Semantic Versioning. They should reflect the version the application is using.
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# It is recommended to use it with quotes.
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appVersion: "2.4.9"

‎k8s-deploy/neodash/README.md‎

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# NeoDash
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![Version: 0.1.0](https://img.shields.io/badge/Version-0.1.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 1.16.0](https://img.shields.io/badge/AppVersion-1.16.0-informational?style=flat-square)
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A NeoDash Helm chart for Kubernetes
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## Resources
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Following are the Kubernetes resources utilized for the NeoDash.
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- Deployment
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- Service
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- Ingress
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- Service Account
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- Horizontal Pod Autoscalar (HPA)
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## Values Configuration
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| Key | Type | Default | Description |
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|-----|------|---------|-------------|
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| autoscaling.enabled | bool | `false` | Enable/disable Autoscaling |
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| enable_reader_mode | bool | `true` | Enable/disable Reader mode |
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| envFromSecrets | list | `[]` | Environment variables from secrets |
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| fullnameOverride | string | `"neodash-test"` | Name override applies to all resources |
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| image.pullPolicy | string | `"IfNotPresent"` | Image pull policy |
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| image.repository | string | `"neo4jlabs/neodash"` | Image repository and Image name |
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| image.tag | string | `"latest"` | Image version |
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| imagePullSecrets | list | `[]` | Image pull secrets if any |
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| podAnnotations | object | `{}` | Pod annotations |
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| podLabels | object | `{}` | Additional labels |
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| podSecurityContext | object | `{}` | Security Context if any |
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| ingress.annotations | object | `{}` | Ingress Annotations for load balancers |
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| ingress.className | string | `"alb"` | Ingress Class |
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| ingress.enabled | bool | `false` | Enable/disable Ingress |
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| ingress.hosts | list | `[]` | Host Details |
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| ingress.tls | list | `[]` | TLS details |
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| livenessProbe.httpGet.path | string | `"/*"` | LivenessProbe path |
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| livenessProbe.httpGet.port | int | `5005` | LivenessProbe port |
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| readinessProbe.httpGet.path | string | `"/*"` | Readiness path |
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| readinessProbe.httpGet.port | int | `5005` | Readiness port |
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| replicaCount | int | `1` | Replica count |
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| resources.limits.cpu | string | `"500m"` | CPU limit |
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| resources.limits.memory | string | `"128Mi"` | Memory limit |
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| resources.requests.cpu | string | `"250m"` | CPU request |
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| resources.requests.memory | string | `"64Mi"` | Memory request |
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| service.annotations | object | `{}` | Service annotations |
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| service.port | int | `5005` | Service port |
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| service.targetPort | int | `5005` | Service target port |
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| service.type | string | `"LoadBalancer"` | Type of service, other options are `ClusterIP` or `NodePort` |
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| serviceAccount.automount | bool | `true` | Enable/disable service account auto mount to pod |
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| serviceAccount.create | bool | `true` | Enable/disable service account |
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| volumeMounts | list | `[]` | Volume mounts on pod |
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| volumes | list | `[]` | Volumes for pod |
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| env | list |<br><pre lang="YAML">- name: "ssoEnabled" &#13; value: "false" &#13;- name: "standalone" &#13; value: "true" &#13;- name: "standaloneProtocol" &#13; value: "neo4j+s" &#13;- name: "standaloneHost" &#13; value: "localhost" &#13;- name: "standalonePort" &#13; value: "7687" &#13;- name: "standaloneDatabase" &#13; value: "neo4j" &#13;- name: "standaloneDashboardName" &#13; value: "test" &#13;- name: "standaloneDashboardDatabase" &#13; value: "neo4j" &#13;- name: "standaloneAllowLoad" &#13; value: "false" &#13;- name: "standaloneLoadFromOtherDatabases" &#13; value: "false" &#13;- name: "standaloneMultiDatabase" &#13; value: "false" &#13;</pre> | Env variables for reader mode |
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## Usage
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- To install this helm chart run the following command,
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```bash
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helm install <release-name> ./neodash -n <namespace-name>
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```
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- To upgrade the release run the following command,
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```bash
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helm upgrade <release-name> ./neodash -n <namespace-name>
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```
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- To uninstall the release run the following command,
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```bash
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helm uninstall <release-name> -n <namespace-name>
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```
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> **Note:** To use custom values files, pass `-f <path-to-values-file>.yaml` for the above command.
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> **Note:** To use custom values, pass `--set param=value` for the above command.
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For example, to install neodash and set the service type to NodePort, run: `helm install <release-name> ./neodash -n <namespace-name> --set service.type=NodePort`

‎k8s-deploy/neodash/templates/NOTES.txt‎

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The NeoDash application has been successfully deployed, here is the application URL:
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{{- if .Values.ingress.enabled }}
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{{- range $host := .Values.ingress.hosts }}
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{{- range .paths }}
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http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
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{{- end }}
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{{- end }}
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{{- else if contains "NodePort" .Values.service.type }}
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Run the following command to retrieve the IP address:
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export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "neodash.fullname" . }})
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export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
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echo http://$NODE_IP:$NODE_PORT
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{{- else if contains "LoadBalancer" .Values.service.type }}
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NOTE: It may take a few minutes for the LoadBalancer IP to be available.
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You can watch the status of the LoadBalancer by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "neodash.fullname" . }}'
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Once available, run the following command to retrieve the IP address:
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export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "neodash.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
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echo http://$SERVICE_IP:{{ .Values.service.port }}
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{{- else if contains "ClusterIP" .Values.service.type }}
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Run the following command to retrieve the IP address:
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export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "neodash.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
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export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
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echo "Visit http://127.0.0.1:8080 to use your application"
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kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
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{{- end }}

‎k8s-deploy/neodash/templates/_helpers.tpl‎

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{{/*
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Expand the name of the chart.
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*/}}
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{{- define "neodash.name" -}}
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{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
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{{- end }}
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{{/*
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Create a default fully qualified app name.
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We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
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If release name contains chart name it will be used as a full name.
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*/}}
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{{- define "neodash.fullname" -}}
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{{- if .Values.fullnameOverride }}
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{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
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{{- else }}
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{{- $name := default .Chart.Name .Values.nameOverride }}
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{{- if contains $name .Release.Name }}
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{{- .Release.Name | trunc 63 | trimSuffix "-" }}
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{{- else }}
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{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
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{{- end }}
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{{- end }}
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{{- end }}
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{{/*
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Create chart name and version as used by the chart label.
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*/}}
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{{- define "neodash.chart" -}}
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{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
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{{- end }}
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{{/*
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Common labels
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*/}}
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{{- define "neodash.labels" -}}
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helm.sh/chart: {{ include "neodash.chart" . }}
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{{ include "neodash.selectorLabels" . }}
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{{- if .Chart.AppVersion }}
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app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
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{{- end }}
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app.kubernetes.io/managed-by: {{ .Release.Service }}
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{{- end }}
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{{/*
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Selector labels
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*/}}
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{{- define "neodash.selectorLabels" -}}
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app.kubernetes.io/name: {{ include "neodash.name" . }}
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app.kubernetes.io/instance: {{ .Release.Name }}
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{{- end }}
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{{/*
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Create the name of the service account to use
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*/}}
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{{- define "neodash.serviceAccountName" -}}
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{{- if .Values.serviceAccount.create }}
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{{- default (include "neodash.fullname" .) .Values.serviceAccount.name }}
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{{- else }}
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{{- default "default" .Values.serviceAccount.name }}
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{{- end }}
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{{- end }}

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