5f2244d25d
* glog: add gzip compression for rotated log files Add opt-in gzip compression that automatically compresses log files after rotation, reducing disk usage in long-running deployments. - Add --log_compress flag to enable compression at startup - Add SetCompressRotated()/IsCompressRotated() for runtime toggle - Compress rotated files in background goroutine (non-blocking) - Use gzip.BestSpeed for minimal CPU overhead - Fix .gz file cleanup: TrimSuffix approach correctly counts compressed files toward MaxFileCount limit - Include 6 unit tests covering normal, empty, large, and edge cases Enabled via --log_compress flag. Default behavior unchanged. * glog: fix compressFile to check gz/dst close errors and use atomic rename Write to a temp file (.gz.tmp) and rename atomically to prevent exposing partial archives. Check gz.Close() and dst.Close() errors to avoid deleting the original log when flush fails (e.g. ENOSPC). Use defer for robust resource cleanup. * glog: deduplicate .log/.log.gz pairs in rotation cleanup During concurrent compression, both foo.log and foo.log.gz can exist simultaneously. Count them as one entry against MaxFileCount to prevent premature eviction of rotated logs. * glog: use portable temp path in TestCompressFile_NonExistent Replace hardcoded /nonexistent/path with t.TempDir() for portability. --------- Co-authored-by: Copilot <copilot@github.com>
glog
====
Leveled execution logs for Go.
This is an efficient pure Go implementation of leveled logs in the
manner of the open source C++ package
http://code.google.com/p/google-glog
By binding methods to booleans it is possible to use the log package
without paying the expense of evaluating the arguments to the log.
Through the -vmodule flag, the package also provides fine-grained
control over logging at the file level.
The comment from glog.go introduces the ideas:
Package glog implements logging analogous to the Google-internal
C++ INFO/ERROR/V setup. It provides functions Info, Warning,
Error, Fatal, plus formatting variants such as Infof. It
also provides V-style logging controlled by the -v and
-vmodule=file=2 flags.
Basic examples:
glog.Info("Prepare to repel boarders")
glog.Fatalf("Initialization failed: %s", err)
See the documentation for the V function for an explanation
of these examples:
if glog.V(2) {
glog.Info("Starting transaction...")
}
glog.V(2).Infoln("Processed", nItems, "elements")
The repository contains an open source version of the log package
used inside Google. The master copy of the source lives inside
Google, not here. The code in this repo is for export only and is not itself
under development. Feature requests will be ignored.
Send bug reports to golang-nuts@googlegroups.com.