new convention

.gitignore

@@ -10,6 +10,7 @@ __pycache__/
 *.lock
 build_locks/
 celery_preview/
+neurolibre_celery_session/
 # Distribution / packaging
 .Python
 build/

api/start_celery.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
-source /home/ubuntu/venv/neurolibre38/bin/activate
+source ${VENV_PATH}/bin/activate
 exec "$@"

systemd/default/celery

@@ -1,9 +1,10 @@
+CUSTOM_START="/home/ubuntu/full-stack-server/api/start_celery.sh"
 VENV_PATH="/home/ubuntu/venv/neurolibre38"
 CELERY_BIN="${VENV_PATH}/bin/celery"
 CELERYD_NODES="w1 w2"
 CELERY_APP="neurolibre_celery_tasks"
 CELERYD_MULTI="multi"
 CELERYD_OPTS="--time-limit=300 --concurrency=8"
-CELERYD_PID_FILE="/home/ubuntu/full-stack-server/api/celery_preview/run/celery/%n.pid"
-CELERYD_LOG_FILE="/home/ubuntu/full-stack-server/api/celery_preview/log/celery/%n%I.log"
+CELERYD_PID_FILE="/home/ubuntu/full-stack-server/api/neurolibre_celery_session/run/celery/%n.pid"
+CELERYD_LOG_FILE="/home/ubuntu/full-stack-server/api/neurolibre_celery_session/log/celery/%n%I.log"
 CELERYD_LOG_LEVEL="INFO"

systemd/neurolibre-preview.service

@@ -1,15 +1,29 @@
 [Unit]
-Description=Neurolibre preview server
+Description=Neurolibre Task Manager
 After=network.target
 
 [Service]
+Type=forking
 User=ubuntu
 Group=www-data
 WorkingDirectory=/home/ubuntu/full-stack-server/api
-Environment="PATH=$PATH:/home/ubuntu/venv/neurolibre/bin"
+EnvironmentFile=/etc/default/celery
+Environment="PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:${VENV_PATH}/bin"
 Environment=GIT_PYTHON_GIT_EXECUTABLE=/usr/bin/git
-ExecStart=/home/ubuntu/venv/neurolibre/bin/gunicorn --workers 4 --bind unix:/home/ubuntu/full-stack-server/api/neurolibre_preview_api.sock -m 007 wsgi_preview:app
-Restart=always
+Environment=CELERY_CREATE_DIRS=1
+ExecStart=/bin/sh -c '${CUSTOM_START} ${CELERY_BIN} -A ${CELERY_APP} multi start ${CELERYD_NODES} \
+    --pidfile="${CELERYD_PID_FILE}" \
+    --logfile="${CELERYD_LOG_FILE}" \
+    --loglevel="${CELERYD_LOG_LEVEL}" \
+    ${CELERYD_OPTS}'
+ExecStop=/bin/sh -c '${CUSTOM_START} ${CELERY_BIN} -A ${CELERY_APP} multi stopwait ${CELERYD_NODES} \
+    --pidfile="${CELERYD_PID_FILE}"'
+ExecReload=/bin/sh -c '${CUSTOM_START} ${CELERY_BIN} -A ${CELERY_APP} multi restart ${CELERYD_NODES} \
+    --pidfile="${CELERYD_PID_FILE}" \
+    --logfile="${CELERYD_LOG_FILE}" \
+    --loglevel="${CELERYD_LOG_LEVEL}" \
+    ${CELERYD_OPTS}'
+Restart=on-failure
 
 [Install]
 WantedBy=multi-user.target