Summary

Adopts Go's standard log/slog package for structured logging throughout the codebase, replacing fmt.Printf and fmt.Fprintf calls with structured JSON output optimized for containerized/OpenShift environments.

Closes #8

Changes

New Components

• internal/logging package: Provides NewLogger() function with configurable log levels
• JSON output format for log aggregation systems
• Debug level when --verbose flag is enabled
• Info level by default

Updated Files

• cmd/virtwork/main.go:
  • Initialize logger based on --verbose flag in runE and cleanupE
  • Replaced ~15 fmt.Fprintf calls with structured logging
  • Updated printSummary() and printDryRun() functions
• internal/wait/wait.go:
  • Added logger parameter to WaitForVMReady() and WaitForAllVMsReady()
  • Replaced fmt.Printf retry messages with debug-level structured logs

Structured Fields

Logs now include contextual fields for filtering and analysis:

• vm_name, namespace, workload, component
• cpu_cores, timeout, vm_count
• run_id, service_name, secret_name
• error details for failures

Testing

• All existing tests pass
• New unit tests for internal/logging package
• Updated test fixtures to use logger

Example Output

{"time":"2026-05-20T10:30:45Z","level":"INFO","msg":"vm created","vm_name":"virtwork-cpu-0","namespace":"virtwork","workload":"cpu"}
{"time":"2026-05-20T10:31:02Z","level":"INFO","msg":"all VMs ready","vm_count":3}

With --verbose:

{"time":"2026-05-20T10:30:50Z","level":"DEBUG","msg":"VMI not yet created, retrying","vm_name":"virtwork-cpu-0","namespace":"virtwork"}

Benefits

• Structured logs integrate with log aggregation systems (ELK, Splunk, CloudWatch)
• JSON format enables efficient filtering and querying
• Contextual fields improve debugging in multi-VM deployments
• --verbose flag provides granular control over log verbosity