bumped default distro in demos, bound mariadb to all ips, added template explaination

demo4-scale-out.py

@@ -13,7 +13,7 @@ from libcloud.compute.types import Provider
 # Please use 1-29 for X in the following variable to specify your group number. (will be used for the username,
 # project etc., as coordinated in the lab sessions)
 
-group_number = X
+group_number = 2
 
 
 # web service endpoint of the private cloud infrastructure
@@ -26,8 +26,9 @@ project_name = 'CloudComp' + str(group_number)
 project_network = 'CloudComp' + str(group_number) + '-net'
 
 # The image to look for and use for the started instance
-#ubuntu_image_name = "Ubuntu 18.04 - Bionic Beaver - 64-bit - Cloud Based Image"
-ubuntu_image_name = "Ubuntu 20.04 - Focal Fossa - 64-bit - Cloud Based Image"
+#ubuntu_image_name = "Ubuntu 20.04 - Focal Fossa - 64-bit - Cloud Based Image"
+ubuntu_image_name = "Ubuntu 22.04 - Jammy Jellyfish - 64-bit - Cloud Based Image"
+
 
 # The public key to be used for SSH connection, please make sure, that you have the corresponding private key
 #
@@ -227,12 +228,6 @@ def main():
     #
     ###########################################################################
 
-    # https://git.openstack.org/cgit/openstack/faafo/plain/contrib/install.sh
-    # is currently broken, hence the "rabbitctl" lines were added in the example
-    # below, see also https://bugs.launchpad.net/faafo/+bug/1679710
-    #
-    # Thanks to Stefan Friedmann for finding this fix ;)
-
     #hsfd_faafo_cloud_init_script = 'https://gogs.informatik.hs-fulda.de/srieger/cloud-computing-msc-ai-examples/raw/master/faafo/contrib/install.sh'
     # testing / faafo dev branch:
     hsfd_faafo_cloud_init_script = 'https://gogs.informatik.hs-fulda.de/srieger/cloud-computing-msc-ai-examples/raw/branch/dev_faafo/faafo/contrib/install.sh'