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README.md

prerender

Prerender is a node server that uses Headless Chrome to render HTML, screenshots, PDFs, and HAR files out of any web page.

TL;DR

$ helm repo add utkuozdemir https://utkuozdemir.org/helm-charts
$ helm install my-release utkuozdemir/prerender

Introduction

This Helm chart simply wraps the Docker image tvanro/prerender-alpine.

Prerequisites

  • Kubernetes 1.15+
  • Helm 3.0+

Installing the Chart

To install the chart with the release name my-release:

$ helm repo add utkuozdemir https://utkuozdemir.org/helm-charts
$ helm install my-release utkuozdemir/prerender

These commands deploy prerender in the default configuration. The Parameters section lists the parameters that can be configured during installation.

Tip: List all releases using helm list

Uninstalling the Chart

To uninstall/delete the my-release release:

$ helm delete my-release

The command removes all the Kubernetes components associated with the chart and deletes the release.

Parameters

Key Description Default
image.repository Image repository "docker.io/tvanro/prerender-alpine"
image.pullPolicy Image pull policy "IfNotPresent"
image.tag Image tag (if not specified, defaults to the chart's appVersion) ""
imagePullSecrets Image pull secrets []
nameOverride String to partially override prerender.fullname template with a string (will prepend the release name) ""
fullnameOverride String to fully override prerender.fullname template with a string ""
serviceAccount.create Create a service account true
serviceAccount.annotations Annotations for the service account {}
serviceAccount.name The name of the service account to create ""
service.type Type of the service "ClusterIP"
service.annotations Annotations for the service {}
ingress.enabled Enable the use of the ingress controller false
ingress.className Class name for the ingress {}
ingress.annotations Annotations for the ingress {}
ingress.hosts Hosts configuration of the ingress see values.yaml
ingress.tls The TLS configuration for the ingress []
replicaCount Pod replica count (if autoscaling is not enabled) 1
autoscaling.enabled Enable autoscaling false
autoscaling.minReplicas Minimum number of replicas when autoscaling is enabled 1
autoscaling.maxReplicas Maximum number of replicas when autoscaling is enabled 10
autoscaling.targetCPUUtilizationPercentage Target CPU utilization percentage when autoscaling is enabled 80
autoscaling.targetMemoryUtilizationPercentage Target memory utilization percentage when autoscaling is enabled nil
resources The resource requests and limits of the container {}
podAnnotations Annotations for the pod {}
podSecurityContext Security context for the pod {}
securityContext Security context for the container {}
nodeSelector The node selector for the deployment {}
tolerations Tolerations for the pod assignment []
affinity Affinity for the pod assignment {}
env The env variable key-value pairs to be passed to the pod {"NODE_ENV":"production"}

The above config parameters map to the various configuration env variables of a typical prerender server.

For more information please refer to the project repository and the Docker image project repository.

Specify each parameter using the --set key=value[,key=value] argument to helm install. For example,

helm install my-release \
    --set env.CACHE_MAXSIZE=2000 \
    utkuozdemir/prerender

Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart. For example,

helm install my-release -f values.yaml utkuozdemir/prerender

Tip: You can use the default values.yaml