scripts: Add a start-server as well.

In general, `./scripts/restart-server` will already work in any
circumstance where the server is already stopped and needs to be
started.  However, it will output a couple minor warnings, and it is
not readily obvious that it *will* work correctly.

Add an alias for `restart-server` named `start-server`, for
parallelism with `stop-server`, which omits the steps of
`restart-server` which would stop the server first.

scripts/restart-server

@@ -19,8 +19,13 @@ from scripts.lib.zulip_tools import (
     overwrite_symlink,
 )
 
+action = "restart"
+if not sys.argv[0].endswith("restart-server"):
+    action = "start"
+verbing = action.title() + "ing"
+
 logging.Formatter.converter = time.gmtime
-logging.basicConfig(format="%(asctime)s restart-server: %(message)s", level=logging.INFO)
+logging.basicConfig(format=f"%(asctime)s {action}-server: %(message)s", level=logging.INFO)
 
 parser = argparse.ArgumentParser()
 parser.add_argument("--fill-cache", action="store_true", help="Fill the memcached caches")
@@ -67,17 +72,18 @@ if len(tornado_ports) > 1:
         # restarts.  This also avoids behavior with restarting a whole
         # supervisord group where if any individual process is slow to
         # stop, the whole bundle stays stopped for an extended time.
-        logging.info("Restarting Tornado process on port %s", p)
-        subprocess.check_call(["supervisorctl", "restart", f"zulip-tornado:zulip-tornado-port-{p}"])
+        logging.info("%s Tornado process on port %s", verbing, p)
+        subprocess.check_call(["supervisorctl", action, f"zulip-tornado:zulip-tornado-port-{p}"])
 else:
-    logging.info("Restarting Tornado process")
-    subprocess.check_call(["supervisorctl", "restart", "zulip-tornado", "zulip-tornado:*"])
+    logging.info("%s Tornado process", verbing)
+    subprocess.check_call(["supervisorctl", action, "zulip-tornado", "zulip-tornado:*"])
 
 # Restart the uWSGI and related processes via supervisorctl.
-logging.info("Stopping workers")
-subprocess.check_call(["supervisorctl", "stop", "zulip-workers:*"])
-logging.info("Stopping server core")
-subprocess.check_call(["supervisorctl", "stop", *core_server_services])
+if action == "restart":
+    logging.info("Stopping workers")
+    subprocess.check_call(["supervisorctl", "stop", "zulip-workers:*"])
+    logging.info("Stopping server core")
+    subprocess.check_call(["supervisorctl", "stop", *core_server_services])
 
 logging.info("Starting server core")
 subprocess.check_call(["supervisorctl", "start", *reversed(core_server_services)])
@@ -90,10 +96,10 @@ if using_sso.strip() == b"True":
     subprocess.check_call(["pkill", "-f", "apache2", "-u", "zulip"])
 
 if os.path.exists("/etc/supervisor/conf.d/zulip/zulip_db.conf"):
-    subprocess.check_call(["supervisorctl", "restart", "process-fts-updates"])
+    subprocess.check_call(["supervisorctl", action, "process-fts-updates"])
 
 logging.info("Done!")
-print(OKGREEN + "Zulip restarted successfully!" + ENDC)
+print(OKGREEN + f"Zulip {action}ed successfully!" + ENDC)
 
 if change_symlink and "PWD" in os.environ:
     for symlink in [last_symlink, current_symlink]:

scripts/start-server

@@ -0,0 +1 @@
+restart-server

templates/zerver/help/import-from-gitter.md

@@ -52,7 +52,7 @@ cd /home/zulip/deployments/current
 ./scripts/stop-server
 ./manage.py convert_gitter_data gitter_data.json --output converted_gitter_data
 ./manage.py import '' converted_gitter_data
-./scripts/restart-server
+./scripts/start-server
 ```
 
 This could take several minutes to run, depending on how much data

templates/zerver/help/import-from-mattermost.md

@@ -152,7 +152,7 @@ cd /home/zulip/deployments/current
 ./scripts/stop-server
 ./manage.py convert_mattermost_data /home/zulip/mattermost --output /home/zulip/converted_mattermost_data
 ./manage.py import "" /home/zulip/converted_mattermost_data/<team-name>
-./scripts/restart-server
+./scripts/start-server
 ```
 
 This could take several minutes to run, depending on how much data

templates/zerver/help/import-from-slack.md

@@ -82,7 +82,7 @@ cd /home/zulip/deployments/current
 ./scripts/stop-server
 ./manage.py convert_slack_data slack_data.zip --token <token> --output converted_slack_data
 ./manage.py import '' converted_slack_data
-./scripts/restart-server
+./scripts/start-server
 ```
 
 This could take several minutes to run, depending on how much data

tools/ci/production-upgrade-pg

@@ -7,7 +7,7 @@ cd /home/github/zulip
 
 su zulip -c ./scripts/stop-server
 ./scripts/setup/upgrade-postgresql
-supervisorctl start all
+su zulip -c ./scripts/start-server
 
 echo "Upgrade of PostgreSQL complete!"
 exit 0