Customization

4 minute read

This document outlines how to customize the build output through Helm overrides and package.json configurations.

Redact Store Values from Logs

By default, the store values are displayed in logs, to redact them you can set the PEPR_STORE_REDACT_VALUES environment variable to true in the package.json file or directly on the Watcher or Admission Deployment. The default value is undefined.

{
  "env": {
    "PEPR_STORE_REDACT_VALUES": "true"
  }
}

Display Node Warnings

You can display warnings in the logs by setting the PEPR_NODE_WARNINGS environment variable to true in the package.json file or directly on the Watcher or Admission Deployment. The default value is undefined.

{
  "env": {
    "PEPR_NODE_WARNINGS": "true"
  }
}

Customizing Log Format

The log format can be customized by setting the PINO_TIME_STAMP environment variable in the package.json file or directly on the Watcher or Admission Deployment. The default value is a partial JSON timestamp string representation of the time. If set to iso, the timestamp is displayed in an ISO format.

Caution: attempting to format time in-process will significantly impact logging performance.

{
  "env": {
    "PINO_TIME_STAMP": "iso"
  }
}

With ISO:

{"level":30,"time":"2024-05-14T14:26:03.788Z","pid":16,"hostname":"pepr-static-test-7f4d54b6cc-9lxm6","method":"GET","url":"/healthz","status":200,"duration":"1 ms"}

Default (without):

{"level":30,"time":"1715696764106","pid":16,"hostname":"pepr-static-test-watcher-559d94447f-xkq2h","method":"GET","url":"/healthz","status":200,"duration":"1 ms"}

Customizing Watch Configuration

The Watch configuration is a part of the Pepr module that allows you to watch for specific resources in the Kubernetes cluster. The Watch configuration can be customized by specific enviroment variables of the Watcher Deployment and can be set in the field in the package.json or in the helm values.yaml file.

Field	Description	Example Values
`PEPR_RESYNC_FAILURE_MAX`	The maximum number of times to fail on a resync interval before re-establishing the watch URL and doing a relist.	default: `"5"`
`PEPR_RETRY_DELAY_SECONDS`	The delay between retries in seconds.	default: `"10"`
`PEPR_LAST_SEEN_LIMIT_SECONDS`	Max seconds to go without receiving a watch event before re-establishing the watch	default: `"300"` (5 mins)
`PEPR_RELIST_INTERVAL_SECONDS`	Amount of seconds to wait before a relist of the watched resources	default: `"600"` (10 mins)

Configuring Reconcile

The Reconcile Action allows you to maintain ordering of resource updates processed by a Pepr controller. The Reconcile configuration can be customized via enviroment variable on the Watcher Deployment, which can be set in the package.json or in the helm values.yaml file.

Field	Description	Example Values
`PEPR_RECONCILE_STRATEGY`	How Pepr should order resource updates being Reconcile()’d.	default: `"kind"`

Available Options
`kind`	separate queues of events for Reconcile()’d resources of a kind
`kindNs`	separate queues of events for Reconcile()’d resources of a kind, within a namespace
`kindNsName`	separate queues of events for Reconcile()’d resources of a kind, within a namespace, per name
`global`	a single queue of events for all Reconcile()’d resources

Customizing with Helm

Below are the available Helm override configurations after you have built your Pepr module that you can put in the values.yaml.

Helm Overrides Table

Parameter	Description	Example Values
`secrets.apiToken`	Kube API-Server Token.	`Buffer.from(apiToken).toString("base64")`
`hash`	Unique hash for deployment. Do not change.	`<your_hash>`
`namespace.annotations`	Namespace annotations	`{}`
`namespace.labels`	Namespace labels	`{"pepr.dev": ""}`
`uuid`	Unique identifier for the module	`hub-operator`
`admission.*`	Admission controller configurations	Various, see subparameters below
`watcher.*`	Watcher configurations	Various, see subparameters below

Admission and Watcher Subparameters

Subparameter	Description
`failurePolicy`	Webhook failure policy [Ignore, Fail]
`webhookTimeout`	Timeout seconds for webhooks [1 - 30]
`env`	Container environment variables
`image`	Container image
`annotations`	Deployment annotations
`labels`	Deployment labels
`securityContext`	Pod security context
`readinessProbe`	Pod readiness probe definition
`livenessProbe`	Pod liveness probe definition
`resources`	Resource limits
`containerSecurityContext`	Container’s security context
`nodeSelector`	Node selection constraints
`tolerations`	Tolerations to taints
`affinity`	Node scheduling options
`terminationGracePeriodSeconds`	Optional duration in seconds the pod needs to terminate gracefully

Note: Replace * within admission.* or watcher.* to apply settings specific to the desired subparameter (e.g. admission.failurePolicy).

Customizing with package.json

Below are the available configurations through package.json.

package.json Configurations Table

Field	Description	Example Values
`uuid`	Unique identifier for the module	`hub-operator`
`onError`	Behavior of the webhook failure policy	`reject`, `ignore`
`webhookTimeout`	Webhook timeout in seconds	`1` - `30`
`customLabels`	Custom labels for namespaces	`{namespace: {}}`
`alwaysIgnore`	Conditions to always ignore	`{namespaces: []}`
`includedFiles`	For working with WebAssembly	[“main.wasm”, “wasm_exec.js”]
`env`	Environment variables for the container	`{LOG_LEVEL: "warn"}`
`rbac`	Custom RBAC rules (requires building with `rbacMode: scoped`)	`{"rbac": [{"apiGroups": ["<apiGroups>"], "resources": ["<resources>"], "verbs": ["<verbs>"]}]}`
`rbacMode`	Configures module to build binding RBAC with principal of least privilege	`scoped`, `admin`

These tables provide a comprehensive overview of the fields available for customization within the Helm overrides and the package.json file. Modify these according to your deployment requirements.

Example Custom RBAC Rules

The following example demonstrates how to add custom RBAC rules to the Pepr module.

{
  "pepr": {
    "rbac": [
      {
        "apiGroups": ["pepr.dev"],
        "resources": ["customresources"],
        "verbs": ["get", "list"]
      },
      {
        "apiGroups": ["apps"],
        "resources": ["deployments"],
        "verbs": ["create", "delete"]
      }
    ]
  }
}