crontab exorcism (#3483)

PBENCH-1206

When use of crontab was removed in favor of a timed systemd service, some
loose ends were overlooked. Also, the BindsTo directive was put in the wrong
section of the timer service file, leading to (apparently innocuous) warnings
on startup. This does some cleanup.

lib/pbench/cli/server/shell.py

@@ -138,11 +138,9 @@ def run_gunicorn(server_config: PbenchServerConfig, logger: Logger) -> int:
         notifier.notify(f"STATUS=Error initializing database: {exc}")
         return 1
 
-    # Multiple cron jobs will attempt to file reports with the Elasticsearch
-    # instance when they start and finish, causing them to all to try to
-    # initialize the templates in the Indexing sub-system.  To avoid race
-    # conditions that can create stack traces, we initialize the indexing sub-
-    # system before we start the cron jobs.
+    # The server and indexer both attempt to initialize the Elasticsearch
+    # instance, which can cause a race and messy logging. To avoid that,
+    # initialize the indexing sub-system here.
     notifier.notify("STATUS=Initializing Elasticsearch")
     logger.info("Performing Elasticsearch indexing setup")
     try:

server/Makefile

@@ -40,7 +40,6 @@ install-dirs:
 	${INSTALL} ${INSTALLOPTS} ${DESTDIR}
 	${INSTALL} ${INSTALLOPTS} ${BINDIR}
 	${INSTALL} ${INSTALLOPTS} ${LIBDIR}
-	${INSTALL} ${INSTALLOPTS} ${LIBDIR}/crontab
 	${INSTALL} ${INSTALLOPTS} ${LIBDIR}/pbench
 	${INSTALL} ${INSTALLOPTS} ${LIBDIR}/pbench/cli
 

server/lib/config/pbench-server-default.cfg

@@ -68,9 +68,6 @@ workers = 3
 # Set the gunicorn worker timeout. Setting it to 0 has the effect of infinite timeouts
 worker_timeout = 9000
 
-# Default roles this pbench server takes on, see crontab roles below.
-roles = pbench-results
-
 # Optional server environment definition
 #environment = staging
 
@@ -119,22 +116,3 @@ logging_level = INFO
 #logger_port = 514
 # "log_dir" is only considered when "logger_type" is set to "file".
 #log_dir =
-
-###########################################################################
-# crontab roles
-[pbench-results]
-user = %(default-user)s
-mailfrom = %(user)s@localhost
-tasks = pbench-index, pbench-re-index
-
-###########################################################################
-# crontab tasks
-
-[pbench-index]
-crontab =  * * * * *  flock -n %(lock-dir)s/pbench-index.lock %(script-dir)s/pbench-index
-
-[pbench-re-index]
-crontab =  * * * * *  flock -n %(lock-dir)s/pbench-re-index.lock %(script-dir)s/pbench-index --re-index
-
-[pbench-index-tool-data]
-crontab =  * * * * *  flock -n %(lock-dir)s/pbench-index-tool-data.lock %(script-dir)s/pbench-index --tool-data

server/lib/systemd/pbench-index.timer

@@ -2,6 +2,7 @@
 Description=Pbench Server indexer timer
 After=pbench-server.service
 Requires=pbench-index.service
+BindsTo=pbench-server.service
 
 [Timer]
 Unit=pbench-index.service
@@ -10,4 +11,3 @@ OnCalendar=*-*-* *:*:15
 
 [Install]
 WantedBy=timers.target
-BindsTo=pbench-server.service