Fixes from CKA course in NovoNordisk 1-10-2024

Fix issue with missing /tmp/container.txt file
Remove dublicate bridge configuration from setup-container
Fix Apparmor issue on ubuntu 24.04

setup-container-previous-version.sh

@@ -58,8 +58,16 @@ version = 2
           [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
             SystemdCgroup = true
 	TOML
-
+	if ! [ -x /usr/sbin/apparmor_parser ]
+	then
+		## Fix for ubuntu 24.04 AppArmor issue where crun cannot delete container - Part of error:
+		## "unknown error after kill: runc did not terminate successfully: exit status 1: unable to signal init: permission denied\n: unknown"
+		sudo ln -s /etc/apparmor.d/runc /etc/apparmor.d/disable/
+		sudo apparmor_parser -R /etc/apparmor.d/runc
+	fi
+	
 	# Restart containerd
 	sudo systemctl restart containerd	
+	touch /tmp/container.txt
 fi
 

setup-kubetools-previousversion.sh

@@ -45,13 +45,6 @@ sleep 2
 	sudo sed -i 's/\/swap/#\/swap/' /etc/fstab
 fi
 
-# Set iptables bridging
-sudo cat <<EOF >  /etc/sysctl.d/k8s.conf
-net.bridge.bridge-nf-call-ip6tables = 1
-net.bridge.bridge-nf-call-iptables = 1
-EOF
-sudo sysctl --system
-
 sudo crictl config --set \
     runtime-endpoint=unix:///run/containerd/containerd.sock
 echo 'after initializing the control node, follow instructions and use kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml to install the calico plugin (control node only). On the worker nodes, use sudo kubeadm join ... to join'