From c0f669cbdf31eebb11a958a188e05bfd94fd24ed Mon Sep 17 00:00:00 2001
From: Jarrod Johnson <jjohnson2@lenovo.com>
Date: Wed, 30 Nov 2022 11:09:39 -0500
Subject: [PATCH] Add DHCP bringup to confluent= el8diskless

For routed, if user specifies confluent=, use that as a clue to
initiate a dhcp transaction to
facilitate routed requests.
---
 .../hooks/cmdline/10-confluentdiskless.sh     | 41 +++++++++++++++++--
 1 file changed, 37 insertions(+), 4 deletions(-)

diff --git a/confluent_osdeploy/el8-diskless/initramfs/usr/lib/dracut/hooks/cmdline/10-confluentdiskless.sh b/confluent_osdeploy/el8-diskless/initramfs/usr/lib/dracut/hooks/cmdline/10-confluentdiskless.sh
index fd3cf6f4..b90729e2 100644
--- a/confluent_osdeploy/el8-diskless/initramfs/usr/lib/dracut/hooks/cmdline/10-confluentdiskless.sh
+++ b/confluent_osdeploy/el8-diskless/initramfs/usr/lib/dracut/hooks/cmdline/10-confluentdiskless.sh
@@ -25,6 +25,7 @@ get_remote_apikey() {
         fi
     done
 }
+. /lib/dracut-lib.sh
 root=1
 rootok=1
 netroot=confluent
@@ -94,6 +95,36 @@ cd - > /dev/null
 rm -rf $tpmdir
 touch /etc/confluent/confluent.info
 cd /sys/class/net
+touch /etc/confluent/confluent.info
+confluentsrv=$(getarg confluent)
+DIDDHCP=0
+if [ ! -z "$confluentsrv" ]; then
+    for i in *; do
+        ip link set $i up
+    done
+    if [[ "$confluentsrv" = *":"* ]]; then
+        confluenthttpsrv=[$confluentsrv]
+        /usr/libexec/nm-initrd-generator ip=:dhcp6
+    else
+        confluenthttpsrv=$confluentsrv
+        ifname=$(ip -br link|grep LOWER_UP|grep -v UNKNOWN|head -n 1|awk '{print $1}')
+        echo -n "Attempting to use dhcp to bring up $ifname..."
+        dhclient $ifname
+        echo -n "Complete: "
+        ip -br addr show dev $ifname
+        DIDDHCP=1
+    fi
+    myids=uuid=$(cat /sys/devices/virtual/dmi/id/product_uuid)
+    for mac in $(ip -br link|grep -v LOOPBACK|awk '{print $3}'); do
+        myids=$myids"/mac="$mac
+    done
+    myname=$(curl -sH "CONFLUENT_IDS: $myids" https://$confluenthttpsrv/confluent-api/self/whoami)
+    if [ ! -z "$myname" ]; then
+        echo NODENAME: $myname > /etc/confluent/confluent.info
+        echo MANAGER: $confluentsrv >> /etc/confluent/confluent.info
+        echo EXTMGRINFO: $confluentsrv'||1' >> /etc/confluent/confluent.info
+    fi
+fi
 echo -n "Scanning for network configuration..."
 while ! grep ^EXTMGRINFO: /etc/confluent/confluent.info | awk -F'|' '{print $3}' | grep 1 >& /dev/null && [ "$TRIES" -lt 30 ]; do
     TRIES=$((TRIES + 1))
@@ -170,10 +201,12 @@ EOC
 autoconfigmethod=$(grep ^ipv4_method: /etc/confluent/confluent.deploycfg |awk '{print $2}')
 auto6configmethod=$(grep ^ipv6_method: /etc/confluent/confluent.deploycfg |awk '{print $2}')
 if [ "$autoconfigmethod" = "dhcp" ]; then
-    echo -n "Attempting to use dhcp to bring up $ifname..."
-    dhclient $ifname
-    echo "Complete:"
-    ip addr show dev $ifname
+    if [ "$DIDDHCP" = "0" ]; then
+        echo -n "Attempting to use dhcp to bring up $ifname..."
+        dhclient $ifname
+        echo -n "Complete: "
+        ip -br addr show dev $ifname
+    fi
     confluent_mgr=$(grep ^deploy_server: /etc/confluent/confluent.deploycfg| awk '{print $2}')
 elif [ "$autoconfigmethod" = "static" ]; then
     confluent_mgr=$(grep ^deploy_server: /etc/confluent/confluent.deploycfg| awk '{print $2}')