Related to #405
Enhances error reporting and logging when all cluster endpoints are
unhealthy, making it easier to diagnose connectivity issues.
Changes:
1. Enhanced error messages in cluster_client.go:
- Error now includes list of unreachable endpoints
- Added detailed logging when no healthy endpoints available
- Log at WARN level (not DEBUG) when cluster health check fails
- Better context in recovery attempts with start/completion summaries
2. Improved storage polling resilience in monitor_polling.go:
- Better error context when cluster storage polling fails
- Specific guidance for "no healthy nodes available" scenario
- Storage polling continues with direct node queries even if
cluster-wide query fails (already worked, but now clearer)
3. Better recovery logging:
- Log when recovery attempts start with list of unhealthy endpoints
- Log individual recovery failures at DEBUG level
- Log recovery summary (success/failure counts)
- Track throttled endpoints separately for clearer diagnostics
These changes help users understand:
- Which specific endpoints are unreachable
- Whether it's a network/connectivity issue vs. API issue
- That Pulse will continue trying to recover endpoints automatically
- That storage monitoring continues via direct node queries
The root issue is that Pulse's internal health tracking can mark all
endpoints unhealthy when they're unreachable from the Pulse server,
even if Proxmox reports them as "online" in cluster status. Better
logging helps diagnose these network connectivity issues.
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