Add prototype ubuntu initrd additions

This sets the stage for Ubuntu deployment

misc/ubuntu20.04deploy/conf/conf.d/confluent

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+echo /scripts/init-premount/confluent >> /scripts/init-premount/ORDER

misc/ubuntu20.04deploy/custom-installation/hooks/casper-bottom.sh

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+cd /root
+cat /tls/*.0 > /root/etc/ssl/certs/ca-certificates.crt
+mkdir -p /root/custom-installation/ssh
+cp /ssh/* /root/custom-installation/ssh
+NODENAME=$(grep ^NODENAME: /custom-installation/confluent/confluent.info|awk '{print $2}')
+MGR=$(grep ^MANAGER: /custom-installation/confluent/confluent.info|head -n 1| awk '{print $2}')
+chroot . custom-installation/confluent/bin/clortho $NODENAME $MGR > /root/custom-installation/confluent/confluent.apikey
+MGR=[$MGR]
+deploycfg=/root/custom-installation/confluent/confluent.deploycfg
+chroot . usr/bin/curl -f -H "CONFLUENT_NODENAME: $NODENAME" -H "CONFLUENT_APIKEY: $(cat /root//custom-installation/confluent/confluent.apikey)" https://${MGR}/confluent-api/self/deploycfg > $deploycfg
+nic=$(grep ^MANAGER /custom-installation/confluent/confluent.info|grep fe80::|sed -e s/.*%//|head -n 1)
+nic=$(ip link |grep ^$nic:|awk '{print $2}')
+DEVICE=${nic%:}
+ipv4m=$(grep ^ipv4_method $deploycfg|awk '{print$2}')
+. /scripts/functions
+if [ "$ipv4m" = "dhcp" ]; then
+    IP=dhcp
+    configure_networking
+elif [ "$ipv4m" = "static" ]; then
+    v4addr=$(grep ^ipv4_address: $deploycfg)
+    v4addr=${v4addr#ipv4_address: }
+    v4gw=$(grep ^ipv4_gateway: $deploycfg)
+    v4gw=${v4gw#ipv4_gateway: }
+    if [ "$v4gw" = "null" ]; then
+        v4gw=""
+    fi
+    v4nm=$(grep ipv4_netmask: $deploycfg)
+    v4nm=${v4nm#ipv4_netmask: }
+    dns=$(grep -A1 ^nameservers: $deploycfg|head -n 2|tail -n 1|sed -e 's/^- //'|sed -e "s/''//")
+
+    IP=$v4addr::$v4gw:$v4nm:$nodename:$DEVICE:none:$dns::
+    configure_networking
+else
+    IP=off
+fi
+ipv4s=$(grep ^ipv4_server $deploycfg|awk '{print $2}')
+osprofile=$(cat /custom-installation/confluent/osprofile)
+echo 'ds=nocloud-net;s=https://'${ipv4s}'/confluent-public/os/'${osprofile}'/autoinstall/' > /custom-installation/confluent/fakecmdline
+/scripts/casper-bottom/58server_network

misc/ubuntu20.04deploy/custom-installation/pre.sh

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+#!/bin/bash
+deploycfg=/custom-installation/confluent/confluent.deploycfg
+mgr=$(grep ^ipv4_server $deploycfg|awk '{print $2}')
+cat /custom-installation/ssh/*.rootpubkey > /root/.ssh/authorized_keys
+nodename=$(grep ^NODENAME: /custom-installation/confluent/confluent.info|awk '{print $2}')
+apikey=$(cat /custom-installation/confluent/confluent.apikey)
+for pubkey in /etc/ssh/ssh_host*key.pub; do
+    certfile=${pubkey/.pub/-cert.pub}
+    keyfile=${pubkey%.pub}
+    curl -f -X POST -H "CONFLUENT_NODENAME: $nodename" -H "CONFLUENT_APIKEY: $apikey" -d @$pubkey https://$mgr/confluent-api/self/sshcert > $certfile
+    echo HostKey $keyfile >> /etc/ssh/sshd_config.d/confluent.conf
+    echo HostCertificate $certfile >> /etc/ssh/sshd_config.d/confluent.conf
+done
+systemctl restart sshd
+sleep 86400

misc/ubuntu20.04deploy/scripts/init-premount/confluent

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+cd /sys/class/net
+for nic in *; do
+    ip link set $nic up
+done
+mkdir -p /custom-installation
+cp -a /opt/confluent /custom-installation
+touch /custom-installation/confluent/confluent.info
+while ! grep NODENAME /custom-installation/confluent/confluent.info; do
+    /opt/confluent/bin/copernicus -t > /custom-installation/confluent/confluent.info
+done
+MGR="[$(grep MANAGER: /custom-installation/confluent/confluent.info | head -n 1 | awk '{print $2}')]"
+osprofile=$(sed -e 's/.*osprofile=//' -e 's/ .*//' /proc/cmdline)
+echo "Deploying $osprofile from $MGR"
+echo $osprofile > /custom-installation/confluent/osprofile
+echo URL=http://${MGR}/confluent-public/os/$osprofile/distribution/live.iso >> /conf/param.conf
+echo "url=http://${MGR}/confluent-public/os/$osprofile/distribution/live.iso" > /custom-installation/confluent/fakecmdline
+mount -o bind /custom-installation/confluent/fakecmdline /proc/cmdline
+
+