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USHIFT-5402: Handle DUID in ipv6 test harness #4586

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Merged
merged 2 commits into from
Feb 24, 2025
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USHIFT-5402: Handle DUID in ipv6 test harness #4586

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379add1
USHIFT-5402: Handle DUID in ipv6 test harness
pacevedom Feb 22, 2025
69dd524
USHIFT-5402: Use nmcli instead of log parsing
pacevedom Feb 24, 2025
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15 changes: 15 additions & 0 deletions test/kickstart-templates/includes/post-network.cfg
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Original file line number Diff line number Diff line change
Expand Up @@ -17,3 +17,18 @@ find /etc/NetworkManager -name '*.nmconnection' -print0 | while IFS= read -r -d
sed -i 's/method=.*/method=auto/g' "${file}"
fi
done

# IPv6 only feature. An IPv6 VM will use DHCPv6 to get an IP address. To identify itself to a DHCP
# server it uses something called DHCP Unique Identifier (DUID), and based on that the DHCP server
# will issue a lease for that DUID and MAC address. When the system boots into anaconda to install
# the OS with kickstart files, the DUID is automatically generated. After the system boots into the
# OS a new DUID may be generated, causing DHCP to identify the VM as a new system, thus allocating
# a new IP address. In order to avoid this, the DUID generated during the installarion is saved and
# configured in NetworkManager to use it when the system boots into the OS.
# The DUID is extracted from the journal logs to avoid pinning to a specific NIC name (which would
# use nmcli commands).
DUID=$(journalctl -u NetworkManager | grep duid | grep -Eo "([0-9a-f]{2}:){17}[0-9a-f]{2}" | uniq)
if [ -n "$DUID" ]; then
mkdir -p /etc/NetworkManager/conf.d/
echo -e "[connection]\nipv6.dhcp-duid=$DUID" > /etc/NetworkManager/conf.d/dhcp-client.conf
fi