fix logging: add logrotate

Makefile

@@ -17,6 +17,8 @@ install:
 	install -m0644 ./nohang.conf $(DESTDIR)/$(PREFIX)/etc/nohang/$(VERSION)
 	install -m0644 ./nohang.conf $(DESTDIR)/$(PREFIX)/etc/nohang/nohang.conf.default
 
+	install -m0644 ./nohang.logrotate $(DESTDIR)/$(PREFIX)/etc/logrotate.d/nohang
+
 	install -d $(DESTDIR)/$(PREFIX)/usr/share/man/man1
 	gzip -k -c nohang.1 > $(DESTDIR)/$(PREFIX)/usr/share/man/man1/nohang.1.gz
 	gzip -k -c oom-sort.1 > $(DESTDIR)/$(PREFIX)/usr/share/man/man1/oom-sort.1.gz
@@ -37,6 +39,7 @@ uninstall:
 	rm -fv $(PREFIX)/usr/share/man/man1/oom-trigger.1.gz
 	rm -fv $(PREFIX)/lib/systemd/system/nohang.service
 	rm -fvr $(PREFIX)/etc/nohang/
+	rm -fvr $(PREFIX)/etc/logrotate.d/nohang
 	rm -fvr $(PREFIX)/var/log/nohang/
 
 systemd:

nohang

@@ -1740,13 +1740,6 @@ else:
     exit(1)
 
 
-if 'log_dir' in config_dict:
-    log_dir = config_dict['log_dir']
-else:
-    errprint('log_dir is not in config\nExit')
-    exit(1)
-
-
 print_total_stat = conf_parse_bool('print_total_stat')
 print_proc_table = conf_parse_bool('print_proc_table')
 
@@ -1758,6 +1751,8 @@ if separate_log:
     from logging import basicConfig
     from logging import info
 
+    log_dir = '/var/log/nohang'
+
     try:
         os.mkdir(log_dir)
     except PermissionError:

nohang.conf

@@ -384,9 +384,6 @@ max_ancestry_depth = 1
 
 separate_log = False
 
-log_dir = /var/log/nohang
-
-
 #####################################################################
 
     9. Misc

nohang.logrotate

@@ -0,0 +1,9 @@
+/var/log/nohang/*.log {
+  missingok
+  copytruncate
+  notifempty
+  size 1M
+  rotate 5
+  compress
+  delaycompress
+}