Correect issue (error message) concerning the Cloud plugin - Related to #2392

docker-compose/glances.conf

@@ -8,7 +8,7 @@
 # It is also possible to overwrite it in each plugin sections
 refresh=2
 # Does Glances should check if a newer version is available on PyPI ?
-check_update=false
+check_update=False
 # History size (maximum number of values)
 # Default is 1200 values (~1h with the default refresh rate)
 history_size=1200

glances/outdated.py

@@ -27,7 +27,7 @@ try:
 
     PACKAGING_IMPORT = True
 except Exception as e:
-    logger.error("Unable to import 'packaging' module ({}). Glances cannot check for updates.".format(e))
+    logger.warning("Unable to import 'packaging' module ({}). Glances cannot check for updates.".format(e))
     PACKAGING_IMPORT = False
 
 PYPI_API_URL = 'https://pypi.python.org/pypi/Glances/json'

optional-requirements.txt

@@ -15,7 +15,7 @@ influxdb>=1.0.0 # For InfluxDB < 1.8
 influxdb-client; python_version >= "3.7" # For InfluxDB >= 1.8
 kafka-python
 netifaces
-py3nvml; python_version >= "3.5"
+packaging; python_version >= "3.7"
 paho-mqtt
 pika
 podman; python_version >= "3.6"
@@ -24,6 +24,7 @@ prometheus_client
 pygal
 pymdstat
 pymongo; python_version >= "3.7"
+py3nvml; python_version >= "3.5"
 pysnmp
 pySMART.smartx
 python-dateutil

setup.py

@@ -80,6 +80,7 @@ def get_install_extras_require():
         # 'gpu' and 'sensors' ==> See below
     }
     if PY3:
+        extras_require['cloud'].append('packaging')
         extras_require['export'].append('influxdb-client')
         extras_require['export'].append('pymongo')
         extras_require['gpu'] = ['py3nvml']