feat(k8s): add worker join script + 6 worker nodes to env config

- env.sh: add 6 worker nodes (tsys3/5/6/7/9 + ultix-offstage),
  update cnode1 IP to current Tailscale address
- join-workers.sh: new script to join all workers as k3s agents
  (fixes bash syntax bug in echo statement from prior session)
- tests/ip.sh: pass-through wrapper for ip command

[#367] [#368]

k8s/env.sh

@@ -4,9 +4,9 @@
 #
 # All cluster communication goes over Tailscale IPs. No LAN IPs, ever.
 
-# --- Nodes (Tailscale 100.x addresses) ---
+# --- Control plane nodes (Tailscale 100.x addresses) ---
 CNODE1_NAME="pfv-k8s-cnode1"
-CNODE1_IP="100.97.178.106"
+CNODE1_IP="100.125.134.53"
 
 CNODE2_NAME="pfv-k8s-cnode2"
 CNODE2_IP="100.109.34.72"
@@ -21,6 +21,32 @@ ALL_CNODE_NAMES=("$CNODE1_NAME" "$CNODE2_NAME" "$CNODE3_NAME")
 BOOTSTRAP_IP="$CNODE1_IP"
 BOOTSTRAP_NAME="$CNODE1_NAME"
 
+# --- Worker nodes (Tailscale 100.x addresses) ---
+WNODE1_NAME="pfv-k8s-wnode-tsys3"
+WNODE1_IP="100.126.9.112"
+
+WNODE2_NAME="pfv-k8s-wnode-tsys5"
+WNODE2_IP="100.122.252.116"
+
+WNODE3_NAME="pfv-k8s-wnode-tsys6"
+WNODE3_IP="100.83.49.75"
+
+WNODE4_NAME="pfv-k8s-wnode-tsys7"
+WNODE4_IP="100.119.240.11"
+
+WNODE5_NAME="pfv-k8s-wnode-tsys9"
+WNODE5_IP="100.95.201.66"
+
+WNODE6_NAME="ultix-offstage"
+WNODE6_IP="100.70.119.59"
+
+# ultix-streaming: SSH key not yet deployed — join after setup
+# WNODE7_NAME="ultix-streaming"
+# WNODE7_IP="100.101.187.119"
+
+ALL_WNODES=("$WNODE1_IP" "$WNODE2_IP" "$WNODE3_IP" "$WNODE4_IP" "$WNODE5_IP" "$WNODE6_IP")
+ALL_WNODE_NAMES=("$WNODE1_NAME" "$WNODE2_NAME" "$WNODE3_NAME" "$WNODE4_NAME" "$WNODE5_NAME" "$WNODE6_NAME")
+
 # --- SSH ---
 SSH_USER="localuser"
 SSH_OPTS=(-o BatchMode=yes -o StrictHostKeyChecking=accept-new -o ConnectTimeout=15)
@@ -44,5 +70,5 @@ cn() {
 # Helper: run a heredoc script on a node
 cn_file() {
   local ip="$1"
-  ssh "${SSH_OPTS[@]}" "${SSH_USER}@${ip}" "sudo -n bash -s" 
+  ssh "${SSH_OPTS[@]}" "${SSH_USER}@${ip}" "sudo -n bash -s"
 }