Hermod

Simple pre-configured Grafana Loki logging and exception handling for Neos

📦 Packagist • Quick Start • Functionality

Quick Start

Important

This package pre-configures the Neos Flow systemLogger and securityLogger as well as the exceptionHandler.

Just add these environment variables and you are good to go:

• LOKI_URI: the URL to your Loki instance
• LOKI_USER: Username
• LOKI_TOKEN: Access Token

Functionality

Logging Backend

A buffered logging backend.

Class: SJS\Hermod\Log\Backend\LokiBackend

Options

key	type		description
severityThreshold	string
url	string		url to your Loki instance. Port included
user	string		Username
token	string		Access token
maxBufferSize	number		How many logs should be buffered until they get sent to Loki
labels	array	optional	key value pair of static labels
fallbackFile	string	optional	Path to a file to log the streams if Loki is not reachable

Example

Configuration/Settings.Neos.Flow.yaml

Neos:
  Flow:
    log:
      psr3:
        'Neos\Flow\Log\PsrLoggerFactory':
          systemLogger:
            default:
              class: SJS\Hermod\Log\Backend\LokiBackend
              options:
                severityThreshold: "%LOG_DEBUG%"
                url: "%env:LOKI_URI%"
                user: "%env:LOKI_USER%"
                token: "%env:LOKI_TOKEN%"
                maxBufferSize: 300
                labels:
                  target: systemLogger

Exception Handling

Production Class: SJS\Hermod\Handler\ProductionExceptionHandler

Debug Class: SJS\Hermod\Handler\DebugExceptionHandler

Options

The exception handling is split into two parts. The Exception Handler uses the Exception Service to send the data to Hermod.

Exception Service

key	type		description
url	string		url to your Hermod instance. Port included
user	string		Username
token	string		Access token
labels	array	optional	key value pair of static labels
fallbackFile	string	optional	Path to a file to log the streams if Loki is not reachable

Exception Handler

key	type		description
lokiIgnoreException	bool	optional	Should the exception be ignored.

Example

Configuration/Settings.SJS.Hermod.yaml

SJS:
  Hermod:
    exceptionService:
      url: "%env:LOKI_URI%"
      user: "%env:LOKI_USER%"
      token: "%env:LOKI_TOKEN%"
      fallbackFile: "%FLOW_PATH_DATA%Logs/loki.log.exceptionService.jsonl"
      labels:
        target: exception

Configuration/Settings.Neos.Flow.yaml

Neos:
  Flow:
    error:
      exceptionHandler:
        className: SJS\Hermod\Handler\ProductionExceptionHandler

        defaultRenderingOptions:
          lokiIgnoreException: false

        renderingGroups:
          authenticationRequiredExceptions:
            matchingStatusCodes: [401]
            options:
              lokiIgnoreException: true

          accessDeniedExceptions:
            matchingStatusCodes: [403]
            options:
              lokiIgnoreException: true

Note

The exception handling is based on Networkteam.SentryClient