caddy-frontend: "Rotate" ATS retention result

Move files from var/log/trafficserver/*old to
srv/backup/logrotate/trafficserver, xz them and clean files older than a
year.

software/caddy-frontend/buildout.hash.cfg

@@ -22,7 +22,7 @@ md5sum = c801b7f9f11f0965677c22e6bbe9281b
 
 [template-apache-frontend]
 filename = instance-apache-frontend.cfg.in
-md5sum = a0edf88cdb73807b0a4793b9fd356199
+md5sum = 77b06f3a7bf67c990a363f8d5155596c
 
 [template-apache-replicate]
 filename = instance-apache-replicate.cfg.in

software/caddy-frontend/instance-apache-frontend.cfg.in

@@ -36,7 +36,7 @@ parts =
   trafficserver-logging-config
   trafficserver-promise-listen-port
   trafficserver-promise-cache-availability
-
+  cron-entry-logrotate-trafficserver
 ## Monitor for Caddy
   monitor-base
   monitor-ats-cache-stats-wrapper
@@ -427,6 +427,7 @@ local-state = ${directory:var}/trafficserver
 bin_path = {{ parameter_dict['trafficserver'] }}/bin
 log = ${directory:log}/trafficserver
 cache-path = ${directory:srv}/ats_cache
+logrotate-backup = ${logrotate-directory:logrotate-backup}/trafficserver
 
 [trafficserver-variable]
 wrapper-path = ${directory:service}/trafficserver
@@ -541,6 +542,30 @@ module = trafficserver_cache_availability
 name = trafficserver-cache-availability.py
 config-wrapper-path = ${trafficserver-ctl:wrapper-path}
 
+[trafficserver-rotate-script]
+< = jinja2-template-base
+template = {{ parameter_dict['template_rotate_script'] }}
+rendered = ${directory:bin}/trafficserver-rotate
+mode = 0700
+xz_binary = {{ parameter_dict['xz_location'] ~ '/bin/xz' }}
+pattern = *.old
+# days to keep log files
+keep_days = 365
+
+extra-context =
+  key log_dir trafficserver-directory:log
+  key rotate_dir trafficserver-directory:logrotate-backup
+  key xz_binary :xz_binary
+  key keep_days :keep_days
+  key pattern :pattern
+
+[cron-entry-logrotate-trafficserver]
+recipe = slapos.cookbook:cron.d
+cron-entries = ${directory:etc}/cron.d
+name = trafficserver-logrotate
+frequency = 0 0 * * *
+command = ${trafficserver-rotate-script:rendered}
+
 ### End of ATS sections
 
 ### Caddy Graceful and promises