From f3742e2f6b6826f2e3154529901e8ee9a10269d5 Mon Sep 17 00:00:00 2001
From: VALKIRIA ACUATICA <56233573+valkiriaaquatica@users.noreply.github.com>
Date: Sun, 7 Jul 2024 14:47:35 +0200
Subject: [PATCH 1/2] interface as variable

---
 scripts/common.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/common.sh b/scripts/common.sh
index d5c9685..9167e96 100755
--- a/scripts/common.sh
+++ b/scripts/common.sh
@@ -77,7 +77,10 @@ sudo apt-mark hold kubelet kubeadm kubectl
 
 sudo apt-get install -y jq
 
-local_ip="$(ip --json addr show eth0 | jq -r '.[0].addr_info[] | select(.family == "inet") | .local')"
+# detects the network interface
+interface=$(ip route | grep default | awk '{print $5}')
+
+local_ip="$(ip --json addr show $interface | jq -r '.[0].addr_info[] | select(.family == "inet") | .local')"
 cat > /etc/default/kubelet << EOF
 KUBELET_EXTRA_ARGS=--node-ip=$local_ip
 EOF

From a06452ef5c13f1a338f05f25ae7731a81396bc8d Mon Sep 17 00:00:00 2001
From: VALKIRIA ACUATICA <56233573+valkiriaaquatica@users.noreply.github.com>
Date: Sun, 7 Jul 2024 14:49:30 +0200
Subject: [PATCH 2/2] change to variable also in master

---
 scripts/master.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/master.sh b/scripts/master.sh
index 026e512..eebe548 100755
--- a/scripts/master.sh
+++ b/scripts/master.sh
@@ -14,11 +14,14 @@ POD_CIDR="192.168.0.0/16"
 
 sudo kubeadm config images pull
 
+# detects the network interface
+interface=$(ip route | grep default | awk '{print $5}')
+
 # Initialize kubeadm based on PUBLIC_IP_ACCESS
 
 if [[ "$PUBLIC_IP_ACCESS" == "false" ]]; then
     
-    MASTER_PRIVATE_IP=$(ip addr show eth0 | awk '/inet / {print $2}' | cut -d/ -f1)
+    MASTER_PRIVATE_IP=$(ip addr show "$interface" | awk '/inet / {print $2}' | cut -d/ -f1)
     sudo kubeadm init --apiserver-advertise-address="$MASTER_PRIVATE_IP" --apiserver-cert-extra-sans="$MASTER_PRIVATE_IP" --pod-network-cidr="$POD_CIDR" --node-name "$NODENAME" --ignore-preflight-errors Swap
 
 elif [[ "$PUBLIC_IP_ACCESS" == "true" ]]; then