# P005O

Null-Bytes Within Rotated Log Files.

# Description

This patch fixes an issue regarding null-bytes within rotated nginx log files. This issue can cause problems with log analysis, as the presence of null-bytes make common tools behave unexpectedly. This patch will prevent the underlying issue that causes null-bytes to be present within rotated log files.

# Impact

There is no expected downtime or performance impact.

# Changes

• Update /etc/logrotate.d/nginx config file to remove strategy involving the copytruncate option.
• Remount /mnt/jrc-logs on web tier with the lookupcache=none option to prevent stale file handles.
• Allow root user to ssh between web tier and jump node

# If You Accept

This patch will add an extra boot hook to your deployment located at /mnt/jrc-comms/hooks/boot.d/99-logrotate-P005O. This boot hook will make sure that the problem is fixed on every boot, this way we can avoid a jump/web AMI rollup proceedure.

# If You Reject

There might occationally be null-bytes present within rotated log files.