Helm Values Yaml

All Helm packed applications have an associated values.yaml file which dictates the configuration of an application. By design many applications ship with a default values.yaml file that is tuned for production deployments which quite often impacts the viability of a prototype or trial deployment. It is important to review the default vales.yaml file to ensure the application will deploy successfully into your target cluster.

Platform9 automatically populates the charts default values.yaml file for all applications, this file can be updated directly in the UI, edited within a text editor or a preexisting configuration may be uploaded.

Edit values.yaml in Platform9 Web App

Common values.yaml Issues

Application Services

Most applications built for Kubernetes expect a Load Balancer service to be associated with the Kubernetes cluster. For deployments in AWS, Platform9 will automatically deploy and associate a load balancer, for BareOS on a VM or Physical Node MetalLB is optional. When a load balancer is not available or you wish to use an ingress controller or NodePort the chart will need to be updated.

The code snippet below is an example of a load balancer configuration.

Service: Load Balancer

"service": {
  "annotations": {},
  "externalTrafficPolicy": "Cluster",
  "extraPorts": [],
  "loadBalancerIP": null,
  "nodePorts": {
   "http": ""
  },
  "port": 80,
  "type": "LoadBalancer"
 },

Storage

Some Helm packaged applications leverage persistent storage by default, when an application is configured to deploy with persistent storage and no storage class or volume can be found the application will fail to start. Updating charts to deploy without persistent storage can be a tricky task, especially if the chart is deploying multiple deployments each with their own storage configuration.

Review the chart documentation for configuring storage and disabling persistent storage.

Persistence Storage

"primary": {
   "persistence": {
    "accessModes": [
     "ReadWriteOnce"
    ],
    "enabled": true,
    "existingClaim": null,
    "hostPath": null,
    "size": "8Gi"
   }
  }