Publised docs about P005O

Author: null93

docs/patches/P005O.md

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+---
+title: 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.