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AL2023 networking changes in install script for VPC CNI compatibility #1539

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Dec 7, 2023
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AL2023 networking changes in install script for VPC CNI compatibility #1539

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17 changes: 13 additions & 4 deletions scripts/install-worker.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -86,10 +86,19 @@ fi
# packages that need special handling
if cat /etc/*release | grep "al2023" > /dev/null 2>&1; then
# exists in al2023 only (needed by kubelet)
sudo yum install -y iptables-legacy

# Remove the amazon-ec2-net-utils package, if it's installed. This package interferes with the route setup on the instance.
if yum list installed | grep amazon-ec2-net-utils; then sudo yum remove amazon-ec2-net-utils -y -q; fi
sudo yum install -y iptables-nft

# Mask udev triggers installed by amazon-ec2-net-utils package
sudo touch /etc/udev/rules.d/99-cni-empty.rules

# Make networkd ignore foreign settings, else it may unexpectedly delete IP rules and routes added by CNI
sudo mkdir -p /etc/systemd/networkd.conf.d/
cat << EOF | sudo tee /etc/systemd/networkd.conf.d/80-release.conf
# Do not clobber any routes or rules added by CNI.
[Network]
ManageForeignRoutes=no
ManageForeignRoutingPolicyRules=no
EOF

# Temporary fix for https://github.com/aws/amazon-vpc-cni-k8s/pull/2118
sudo sed -i "s/^MACAddressPolicy=.*/MACAddressPolicy=none/" /usr/lib/systemd/network/99-default.link || true
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