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fix: reduce syslog flooding by downgrading routine logs to debug level

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Addresses issue #861 - syslog flooded on docker host

Many routine operational messages were being logged at INFO level,
causing excessive log volume when monitoring multiple VMs/containers.
These messages are now logged at DEBUG level:

- Guest threshold checking (every guest, every poll cycle)
- Storage threshold checking (every storage, every poll cycle)
- Host agent linking messages
- Filesystem inclusion in disk calculation
- Guest agent disk usage replacement
- Polling start/completion messages
- Alert cleanup and save messages

Users can set LOG_LEVEL=debug to see these messages if needed for
troubleshooting. The default INFO level now produces significantly
less log output.

Also updated documentation in CONFIGURATION.md and DOCKER.md to:
- Clarify what each log level includes
- Add tip about using LOG_LEVEL=warn for minimal logging
This commit is contained in:
rcourtman 2025-12-18 23:24:17 +00:00
parent 8400976e80
commit 968e0a7b3d
5 changed files with 36 additions and 23 deletions
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16
internal/monitoring/monitor.go
View file

@ -2219,7 +2219,7 @@ func (m *Monitor) ApplyHostReport(report agentshost.Report, tokenRecord *config.
linkedNodeID, linkedVMID, linkedContainerID := m.findLinkedProxmoxEntity(hostname)
if linkedNodeID != "" {
host.LinkedNodeID = linkedNodeID
log.Info().
log.Debug().
Str("hostId", identifier).
Str("hostname", hostname).
Str("linkedNodeId", linkedNodeID).
@ -2227,7 +2227,7 @@ func (m *Monitor) ApplyHostReport(report agentshost.Report, tokenRecord *config.
}
if linkedVMID != "" {
host.LinkedVMID = linkedVMID
log.Info().
log.Debug().
Str("hostId", identifier).
Str("hostname", hostname).
Str("linkedVmId", linkedVMID).
@ -2235,7 +2235,7 @@ func (m *Monitor) ApplyHostReport(report agentshost.Report, tokenRecord *config.
}
if linkedContainerID != "" {
host.LinkedContainerID = linkedContainerID
log.Info().
log.Debug().
Str("hostId", identifier).
Str("hostname", hostname).
Str("linkedContainerId", linkedContainerID).
@ -5837,7 +5837,7 @@ func (m *Monitor) pollPVEInstance(ctx context.Context, instanceName string, clie
// When the instance is part of a cluster, the cluster name is used for guest IDs to prevent duplicates
// when multiple cluster nodes are configured as separate PVE instances.
func (m *Monitor) pollVMsAndContainersEfficient(ctx context.Context, instanceName string, clusterName string, isCluster bool, client PVEClientInterface, nodeEffectiveStatus map[string]string) bool {
log.Info().
log.Debug().
Str("instance", instanceName).
Str("clusterName", clusterName).
Bool("isCluster", isCluster).
@ -6189,7 +6189,7 @@ func (m *Monitor) pollVMsAndContainersEfficient(ctx context.Context, instanceNam
}
if len(includedFS) > 0 {
log.Info().
log.Debug().
Str("instance", instanceName).
Str("vm", res.Name).
Int("vmid", res.VMID).
@ -6223,7 +6223,7 @@ func (m *Monitor) pollVMsAndContainersEfficient(ctx context.Context, instanceNam
diskFree = totalBytes - usedBytes
diskUsage = safePercentage(float64(usedBytes), float64(totalBytes))
log.Info().
log.Debug().
Str("instance", instanceName).
Str("vm", res.Name).
Int("vmid", res.VMID).
@ -6596,7 +6596,7 @@ func (m *Monitor) pollVMsAndContainersEfficient(ctx context.Context, instanceNam
nodesWithResources[res.Node] = true
}
log.Info().
log.Debug().
Str("instance", instanceName).
Int("nodesInResources", len(nodesWithResources)).
Int("totalVMsFromResources", len(allVMs)).
@ -6719,7 +6719,7 @@ func (m *Monitor) pollVMsAndContainersEfficient(ctx context.Context, instanceNam
m.pollReplicationStatus(ctx, instanceName, client, allVMs)
log.Info().
log.Debug().
Str("instance", instanceName).
Int("vms", len(allVMs)).
Int("containers", len(allContainers)).