nodetool disableauditlog

Disables audit logging on the node.

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Synopsis

nodetool [connection_options] disableauditlog

Description

nodetool disableauditlog deactivates the audit logging feature on a Cassandra node. When disabled, the node stops recording audit events for authentication, authorization, and CQL operations.

Non-Persistent Setting

This setting is applied at runtime only and does not persist across node restarts. After a restart, audit logging reverts to the configuration in cassandra.yaml:

audit_logging_options:
    enabled: true    # or false
    logger:
      - class_name: BinAuditLogger
    included_keyspaces:
    excluded_keyspaces: system,system_schema,system_virtual_schema
    included_categories:
    excluded_categories:

To permanently disable audit logging, set enabled: false in the audit_logging_options section of cassandra.yaml.

Compliance Impact

Disabling audit logging may violate regulatory compliance requirements. Ensure appropriate approvals before disabling in production environments subject to SOX, HIPAA, PCI-DSS, or similar regulations.

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Examples

Basic Usage

nodetool disableauditlog

Disable and Verify

nodetool disableauditlog
nodetool getauditlog
# Expected: enabled: false

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Behavior

When audit logging is disabled:

1. No new audit events are recorded
2. Existing audit logs remain on disk
3. Audit log archival continues for existing files
4. Performance overhead from auditing is eliminated

What Continues

Feature	Status
Existing audit logs	Preserved
Log archival	Continues for existing logs
All database operations	Continue normally

What Stops

Feature	Status
New audit event recording	Stops
Audit log growth	Stops
Audit-related disk I/O	Stops

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When to Use

Emergency Performance Recovery

If audit logging is causing performance issues:

# Check current impact
nodetool tpstats

# Disable audit logging
nodetool disableauditlog

# Verify performance improvement
nodetool tpstats

After Troubleshooting Session

When temporary auditing is no longer needed:

# Investigation complete
nodetool disableauditlog

# Verify disabled
nodetool getauditlog

Disk Space Emergency

If audit logs are consuming too much disk:

# 1. Disable new audit logging
nodetool disableauditlog

# 2. Archive or remove old audit logs
mv /var/log/cassandra/audit/* /archive/

# 3. Verify disk space freed
df -h /var/log/cassandra/

Before Maintenance

Temporarily disable during maintenance to reduce overhead:

# Before maintenance
nodetool disableauditlog

# Perform maintenance...

# After maintenance (if compliance requires)
nodetool enableauditlog --included-categories AUTH,DML,DDL,DCL

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Impact Assessment

Immediate Effects

Aspect	Impact
Audit event recording	Stops immediately
Disk I/O from auditing	Eliminated
Operation latency	May decrease slightly
Compliance coverage	Gaps in audit trail

Compliance Implications

Scenario	Impact
Operations during disabled period	Not recorded
Security incidents	No audit trail
Access reviews	Incomplete data
Regulatory audits	Potential gap findings

Audit Trail Gap

While audit logging is disabled, there is no record of database access. This creates a gap in the audit trail that may need to be documented and explained during compliance reviews.

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Workflow: Controlled Disable/Enable

#!/bin/bash
# controlled_audit_toggle.sh

echo "=== Audit Logging Control ==="
echo "WARNING: Disabling audit logging creates compliance gaps!"
echo ""

# 1. Document current state
echo "1. Current audit configuration:"
nodetool getauditlog

# 2. Log the disable action
echo ""
echo "2. Logging disable action..."
echo "$(date): Audit logging disabled by $(whoami) - Reason: [DOCUMENT REASON]" >> /var/log/cassandra/audit_changes.log

# 3. Disable audit logging
echo ""
echo "3. Disabling audit logging..."
nodetool disableauditlog

# 4. Verify disabled
echo ""
echo "4. Verification:"
nodetool getauditlog

echo ""
echo "IMPORTANT: Document the duration audit logging is disabled."
echo "Remember to re-enable: nodetool enableauditlog"

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Cluster-Wide Operations

Disable on All Nodes

#!/bin/bash
# disable_audit_cluster.sh

echo "WARNING: Disabling audit logging cluster-wide!"
echo "This will create gaps in the audit trail."
echo ""

# Log the action
echo "$(date): Cluster-wide audit disable initiated by $(whoami)" >> /var/log/audit_changes.log

# Get list of node IPs from local nodetool status
nodes=$(nodetool status | grep "^UN" | awk '{print $2}')

for node in $nodes; do
    echo -n "$node: "
    ssh "$node" "nodetool disableauditlog" 2>/dev/null && echo "disabled" || echo "FAILED"
done

echo ""
echo "Verification:"
for node in $nodes; do
    echo -n "$node: "
    ssh "$node" "nodetool getauditlog" 2>/dev/null | grep "enabled"
done

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Managing Existing Audit Logs

Preserve Existing Logs

# After disabling, audit logs remain
ls -la /var/log/cassandra/audit/

# Archive existing logs
tar -czf audit_logs_$(date +%Y%m%d).tar.gz /var/log/cassandra/audit/

Clean Up Audit Logs

# After disabling, if cleanup is needed
# CAUTION: Ensure logs are archived first if required for compliance

# Remove old audit logs
rm -rf /var/log/cassandra/audit/*.cq4

# Or remove all audit logs
rm -rf /var/log/cassandra/audit/*

Archive Before Cleanup

#!/bin/bash
# archive_and_cleanup_audit.sh

AUDIT_DIR="/var/log/cassandra/audit"
ARCHIVE_DIR="/archive/cassandra/audit"

# 1. Create archive
timestamp=$(date +%Y%m%d_%H%M%S)
archive_file="${ARCHIVE_DIR}/audit_${timestamp}.tar.gz"

echo "Archiving audit logs to $archive_file..."
tar -czf $archive_file $AUDIT_DIR/

# 2. Verify archive
if [ -f "$archive_file" ]; then
    echo "Archive created successfully: $(ls -lh $archive_file)"

    # 3. Clean up source
    echo "Cleaning up source directory..."
    rm -rf ${AUDIT_DIR}/*

    echo "Cleanup complete."
else
    echo "ERROR: Archive creation failed!"
    exit 1
fi

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Troubleshooting

Cannot Disable

# Check JMX connectivity
nodetool info

# Check for errors
grep -i "audit" /var/log/cassandra/system.log | tail -20

Audit Logs Still Growing After Disable

# Verify disabled
nodetool getauditlog

# If still showing enabled, retry
nodetool disableauditlog

# Check for configuration override
grep -i "audit" /etc/cassandra/cassandra.yaml

Performance Not Improved After Disable

# Verify audit logging is truly disabled
nodetool getauditlog | grep enabled

# Check for other I/O sources
iostat -x 1

# Audit logging may not have been the cause
nodetool compactionstats
nodetool tpstats

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Re-enabling Audit Logging

After investigation or maintenance, re-enable with appropriate settings:

# Re-enable with previous settings
nodetool enableauditlog \
    --included-categories AUTH,DML,DDL,DCL \
    --excluded-keyspaces system,system_schema

# Verify enabled
nodetool getauditlog

# Log the re-enable action
echo "$(date): Audit logging re-enabled by $(whoami)" >> /var/log/cassandra/audit_changes.log

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Compliance Documentation

When disabling audit logging, maintain documentation:

#!/bin/bash
# Document audit logging changes

COMPLIANCE_LOG="/var/log/cassandra/compliance_audit.log"

# Log format: timestamp | action | user | reason | duration
log_entry() {
    echo "$(date -Iseconds) | $1 | $(whoami) | $2 | $3" >> $COMPLIANCE_LOG
}

# Example: Disable with documentation
log_entry "DISABLE" "Performance emergency - ticket INC12345" "Expected 2 hours"
nodetool disableauditlog

# Example: Re-enable with documentation
nodetool enableauditlog --included-categories AUTH,DML,DDL,DCL
log_entry "ENABLE" "Performance issue resolved - ticket INC12345" "N/A"

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Best Practices

Disable Guidelines

1. Document the reason - Record why auditing was disabled
2. Get approval - Ensure appropriate authorization
3. Minimize duration - Re-enable as soon as possible
4. Archive first - Preserve existing logs before any cleanup
5. Monitor impact - Verify expected performance improvement
6. Plan re-enablement - Schedule when to re-enable

Compliance Warning

• Disabling audit logging creates gaps in the audit trail
• May violate regulatory requirements
• Document all periods when auditing was disabled
• Consider this a temporary measure only
• Review with compliance/security team before disabling

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Related Commands

Command	Relationship
enableauditlog	Enable audit logging
getauditlog	View audit log configuration
enablefullquerylog	Enable full query logging
disablefullquerylog	Disable full query logging