From 9480988a7ae1f677edaf4446c8380962df831926 Mon Sep 17 00:00:00 2001
From: pavel <pavel.larkin@ikeja.co.za>
Date: Tue, 20 Jan 2026 11:11:56 +0200
Subject: [PATCH] 1111

---
 files/ansible-playbooks/ptsd-migrate.yml | 54 +++++++++++++++++++++++-
 1 file changed, 53 insertions(+), 1 deletion(-)

diff --git a/files/ansible-playbooks/ptsd-migrate.yml b/files/ansible-playbooks/ptsd-migrate.yml
index e1d2e58..cc053cc 100644
--- a/files/ansible-playbooks/ptsd-migrate.yml
+++ b/files/ansible-playbooks/ptsd-migrate.yml
@@ -588,6 +588,58 @@
           esac
       changed_when: false
 
+
+    # ============================ PHASE 0 (LAST): DEV2 STATE GUARD (OLD PPP EXPECTED) ============================
+    - name: "PHASE 0 (LAST) | DEV2 check: ppp0 has IPv4 (old expected) via wrapper"
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        export DEV2_CMD="ip -4 addr show dev ppp0 2>/dev/null | grep -m1 'inet ' >/dev/null 2>&1 && echo YES || echo NO"
+        {{ dev2_exec_cmd }}
+      args: { executable: /bin/bash }
+      register: dev2_ppp0_has_ipv4
+      changed_when: false
+      failed_when: false
+
+    - name: "PHASE 0 (LAST) | DEV2 check: eth0.4000 exists (new/migrated indicator) via wrapper"
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        export DEV2_CMD="ip link show eth0.4000 >/dev/null 2>&1 && echo YES || echo NO"
+        {{ dev2_exec_cmd }}
+      args: { executable: /bin/bash }
+      register: dev2_eth04000_exists
+      changed_when: false
+      failed_when: false
+
+    - name: "PHASE 0 (LAST) | Summarize DEV2 pre-migration eligibility"
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_ppp_old_ok: "{{ (dev2_ppp0_has_ipv4.stdout | default('') | trim) == 'YES' }}"
+        dev2_eth04000_present: "{{ (dev2_eth04000_exists.stdout | default('') | trim) == 'YES' }}"
+        dev2_pre_migration_ok: >-
+          {{
+            ((dev2_ppp0_has_ipv4.stdout | default('') | trim) == 'YES')
+            and
+            ((dev2_eth04000_exists.stdout | default('') | trim) != 'YES')
+          }}
+      changed_when: false
+
+    - name: "PHASE 0 (LAST) | Stop if DEV2 is NOT a pure old PPP device"
+      when: not (dev2_pre_migration_ok | bool)
+      delegate_to: localhost
+      ansible.builtin.debug:
+        msg:
+          - "We shall not continue: DEV2 is not a pure old PPP device."
+          - "ppp0_has_ipv4={{ dev2_ppp_old_ok }}"
+          - "eth0.4000_exists={{ dev2_eth04000_present }}"
+          - "dev2_conn_final={{ dev2_conn_final }}"
+      changed_when: false
+
+    - name: "PHASE 0 (LAST) | End host if DEV2 is NOT a pure old PPP device"
+      when: not (dev2_pre_migration_ok | bool)
+      ansible.builtin.meta: end_host
+
+
+
     # ============================ PHASE 1: FIRST ON-DEVICE COMMAND (uptime) ============================
     - name: "PHASE 1 | DEV2 uptime via wrapper"
       delegate_to: localhost
@@ -857,7 +909,7 @@
       ansible.builtin.fail:
         msg: "DEV2 md5sum for {{ dev2_config_dhcp_remote_path }} is empty; upload failed or md5sum unavailable."
 
-    - name: PHASE 1 | Compare controller vs DEV2 md5sum for config-dhcp.json (fail on mismatch)
+    - name: PHASE 1 | Compare controller vs DEV2 md5sum for config-dhcp.json (Ok, to be skipped. fail on mismatch)
       delegate_to: localhost
       ansible.builtin.fail:
         msg: >-