chore(template): Add Helm helper for telemetry env vars

[Techassi]

Part of stackabletech/issues#639

Depends on

• refactor!: Update telemetry related env vars and CLI args operator-rs#1009
• feat(stackable-telemetry)!: Allow configuration of file_log_max_files operator-rs#1010
• feat(stackable-telemetry): Support JSON console log output operator-rs#1012

This adds the telemetry.envVars Helm helper to create a list of environment variables passed on the .telemetry values.

Example

Given these values form the Helm values.yaml file

telemetry: consoleLog: enabled: false level: warn format: json fileLog: enabled: true level: debug rotationPeriod: hourly maxFiles: 6 otelLogExporter: enabled: true level: trace endpoint: my-collector:4317 otelTraceExporter: enabled: true level: error endpoint: my-collector:4317

the rendered env block in the Deployment looks like

apiVersion: apps/v1 kind: Deployment metadata: name: foo-operator-airflow-operator-deployment spec: template: spec: containers: - name: airflow-operator env: - name: CONSOLE_LOG_DISABLED value: "true" - name: CONSOLE_LOG_LEVEL value: warn - name: CONSOLE_LOG_FORMAT value: json - name: FILE_LOG_DIRECTORY value: /stackable/logs/airflow-operator - name: FILE_LOG_LEVEL value: debug - name: FILE_LOG_ROTATION_PERIOD value: hourly - name: FILE_LOG_MAX_FILES value: 6 - name: OTEL_LOG_EXPORTER_ENABLED value: "true" - name: OTEL_LOG_EXPORTER_LEVEL value: trace - name: OTEL_EXPORTER_OTLP_LOGS_ENDPOINT value: my-collector:4317 - name: OTEL_TRACE_EXPORTER_ENABLED value: "true" - name: OTEL_TRACE_EXPORTER_LEVEL value: error - name: OTEL_EXPORTER_OTLP_TRACES_ENDPOINT value: my-collector:4317

Default values will be set according to the design laid out in the tracking issue.

[NickLarsenNZ]

LGTM

[NickLarsenNZ]

Release Note

All operators now have access to these telemetry related Helm values. These are the defaults:

telemetry: consoleLog: enabled: true level: null format: null fileLog: enabled: false level: null rotationPeriod: null maxFiles: null otelLogExporter: enabled: false level: null endpoint: null otelTraceExporter: enabled: false level: null endpoint: null

[NickLarsenNZ]

LGTM