initial

setups/gateway.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+dpkg-reconfigure openssh-server
+
+# the "northbound" interface connecting the gateway to the "real" server/clab hypervisor (NOT management-interface!)
+ip addr replace dev eth1 10.192.40.2/29
+
+# the "southbound" interface towards all the clients that we are DHCP server for
+ip addr replace dev eth2 192.168.0.1/24 
+
+# "eastbound" gw<->jumphost1 eth3 and 172.16.200/23 behind jumphost1
+ip addr replace dev eth3 172.16.202.32/31
+# ip route replace 172.16.200/23 via 172.16.202.33
+
+echo "nameserver 192.168.0.1" > /etc/resolv.conf
+
+
+# ----------------------------------------------------------------------
+# Run the long pipeline in the background, but start it only after 60 s.
+# The rest of the script continues immediately.
+# ----------------------------------------------------------------------
+
+(
+    # wait 60 seconds first
+    sleep 60
+    # cat /var/lib/misc/dnsmasq.leases | while read line; do loctet=$(echo $line | cut -f 4 -d . | cut -f 1 -d " "); printf "${line}\t"; sed -n "$loctet{p;q}" < <(tr ":" "," < /etc/workshopnames.yml | cut -f 1,3 -d, | tr , "\t") ; done | cut -b 30- | sort -b -k 2,2V | column -t
+    cat /var/lib/misc/dnsmasq.leases | cut -d' ' -f3-4 |
+    while read -r line; do
+        loctet=$(echo "$line" | cut -d'.' -f4 | cut -d' ' -f1)
+        printf '%s\t' "$line"
+        sed -n "${loctet}{p;q}" < <(
+            tr ':' ',' < /etc/workshopnames.yml |
+            cut -d',' -f1,3 |
+            tr ',' '\t'
+        )
+    done |
+    # cut -b30- |
+    sort -b -k2,2V |
+    column -t
+) > /online-users.txt &   # ← background the whole subshell
+
+
+# launch dnsmasq (automatically backgrounds)
+dnsmasq --no-daemon 
+
+# /usr/sbin/sshd -D