Inject a hook for cmdline to specify confulent server

This enables a more manual approach
to indicate the deployment server.

This carries the assumption that a
normal OS autonetwork config
will get the node to the right network.

This is one step toward enabling a scenario where the target is remote and the DHCP is not going to relay, but instead the deployment feeds the DHCP a confluent URL entry point to get going.

Using this parameter precludes:
-Enhanced NIC auto selection.  If the OS auto-selection fails to
identify the correct interface, the profile will need nic name baked in.
-Auto-select deployment server from several.  This will mean that any
HA will require IP takeover be externally handled

This is of course on top of the manual process of
indicating confluent in kernelargs.

confluent_osdeploy/el8/initramfs/usr/lib/dracut/hooks/pre-trigger/01-confluent.sh

@@ -96,6 +96,25 @@ if [ -e /dev/disk/by-label/CNFLNT_IDNT ]; then
 fi
 cd /sys/class/net
 if ! grep MANAGER: /etc/confluent/confluent.info; then
+    confluentsrv=$(getarg confluent)
+    if [ ! -z "$confluentsrv" ]; then
+        if [[ "$confluentsrv" = *":"* ]]; then
+            /usr/libexec/nm-initrd-generator ip=:dhcp6
+        else
+            /usr/libexec/nm-initrd-generator ip=:dhcp
+        fi
+        NetworkManager --configure-and-quit=initrd --no-daemon
+        myids=uuid=$(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: $myids" https://$confluentsrv/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
     while ! grep ^EXTMGRINFO: /etc/confluent/confluent.info | awk -F'|' '{print $3}' | grep 1 >& /dev/null && [ "$TRIES" -lt 60 ]; do
         TRIES=$((TRIES + 1))
         for currif in *; do

confluent_server/confluent/netutil.py

@@ -237,6 +237,8 @@ class NetManager(object):
             if ipv6addr:
                 myattribs['ipv6_method'] = 'static'
                 myattribs['ipv6_address'] = ipv6addr
+        else:
+            myattribs['ipv6_method'] = 'dhcp'
         if attribs.get('ipv6_gateway', None) and 'ipv6_method' in myattribs:
             myattribs['ipv6_gateway'] = attribs['ipv6_gateway']
         if 'ipv4_method' not in myattribs and 'ipv6_method' not in myattribs:

confluent_server/confluent/selfservice.py

@@ -71,6 +71,22 @@ def handle_request(env, start_response):
     cfg = configmanager.ConfigManager(None)
     nodename = env.get('HTTP_CONFLUENT_NODENAME', None)
     clientip = env.get('HTTP_X_FORWARDED_FOR', None)
+    if env['PATH_INFO'] == '/self/whoami':
+        clientids = env.get('HTTP_CONFLUENT_IDS', None)
+        if not clientids:
+            start_response('400 Bad Request', [])
+            yield 'Bad Request'
+            return
+        for ids in clientids.split('/'):
+            _, v = ids.split('=', 1)
+            repname = disco.get_node_by_uuid_or_mac(v)
+            if repname:
+                start_response('200 OK', [])
+                yield repname
+                return
+        start_response('404 Unknown', [])
+        yield ''
+        return
     if env['PATH_INFO'] == '/self/registerapikey':
         crypthmac = env.get('HTTP_CONFLUENT_CRYPTHMAC', None)
         if int(env.get('CONTENT_LENGTH', 65)) > 64: