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files/ansible-playbooks/redirect_and_block_remove.yml

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+# redirect_and_block_removal.yml — connectivity + stage block scripts removal
+# Phase 0: reliable DEV2 connectivity + wrapper build
+# Phase 1: run twice and remove the scripts
+
+- name: "Redirect and block | Connectivity + stage scripts"
+  hosts: all
+  gather_facts: no
+
+  vars:
+    pathprefix: "PATH=/sbin:/usr/sbin:/bin:/usr/bin:$PATH; "
+
+    rmq_host: "{{ lookup('env','RMQ_HOST') | default('10.210.12.2', true) }}"
+    rmq_port: "{{ lookup('env','RMQ_PORT') | default('15672', true) }}"
+    rmq_user: "{{ lookup('env','RMQ_USER') | default('admin', true) }}"
+    rmq_pass: "{{ lookup('env','RMQ_PASS') | default('change_me', true) }}"
+    rmq_vhost: "{{ lookup('env','RMQ_VHOST') | default('app', true) }}"
+    rmq_exchange: "{{ lookup('env','RMQ_EXCHANGE') | default('controls', true) }}"
+    control_queue: "{{ lookup('env','CONTROL_QUEUE') | default('queue_controls', true) }}"
+
+
+    dev1_user: "root"
+    dev1_pass: "wavewave"
+
+    dev2_host: "192.168.1.1"
+    dev2_port: 22
+
+    dev2_side_ip: "192.168.1.11/24"
+    dev2_side_ip_addr: "{{ dev2_side_ip.split('/')[0] }}"
+    dev1_iface: "br-wan"
+
+    arping_iface: "eth0"
+
+    dev2_ssh_user: "root"
+    dev2_passfiles:
+      - "basicpass"
+      - "basicpass2"
+
+    ssh_opts_common: >-
+      -o PreferredAuthentications=password
+      -o PubkeyAuthentication=no
+      -o StrictHostKeyChecking=no
+      -o UserKnownHostsFile=/dev/null
+      -o NumberOfPasswordPrompts=1
+      -o ConnectTimeout=30
+      -o ConnectionAttempts=1
+      -o LogLevel=ERROR
+
+    debugging: true
+    ssh_timeout: 30
+
+    block_src_dir: "/opt/containers/ansible-worker/app"
+    block_dst_dir: "/root"
+    block_files:
+      - "startblock.sh"
+      - "stopblock.sh"
+
+  tasks:
+    - name: Initialize passfile facts (avoid undefined vars in later templates)
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_passfile_used_direct: "NONE"
+        dev2_passfile_used_tunnel: "NONE"
+        dev2_passfile_used_lldp4: "NONE"
+        dev2_passfile_used_lldp6: "NONE"
+      changed_when: false
+
+    # ============================ PHASE 0: LLDP DISCOVERY (IPv4 + IPv6) ============================
+    - name: Compute hostname digits key for LLDP lookup (DEV2)
+      ansible.builtin.set_fact:
+        dev2_lldp_digits: "{{ (inventory_hostname | string) | regex_replace('[^0-9]', '') }}"
+      changed_when: false
+
+    - name: Discover DEV2 candidate IPv4 via LLDP on DEV1 (best-effort)
+      ansible.builtin.raw: >
+        {{ pathprefix }}
+        DIGITS="{{ dev2_lldp_digits }}";
+        cat /var/run/lldp_server.json 2>/dev/null \
+          | grep "${DIGITS}" -A 10 \
+          | grep address \
+          | grep -vE 'subtype|ipv6' \
+          | awk -F'"' '{ print $4 }' \
+          | head -n1
+      register: dev2_lldp_ip_raw
+      changed_when: false
+      failed_when: false
+
+    - name: Discover DEV2 candidate IPv6 via LLDP on DEV1 (best-effort)
+      ansible.builtin.raw: >
+        {{ pathprefix }}
+        DIGITS="{{ dev2_lldp_digits }}";
+        cat /var/run/lldp_server.json 2>/dev/null \
+          | grep "${DIGITS}" -A 15 \
+          | grep 'address_ipv6' \
+          | awk -F'"' '{ print $4 }' \
+          | head -n1
+      register: dev2_lldp_ip6_raw
+      changed_when: false
+      failed_when: false
+
+    - name: Capture LLDP-derived DEV2 IP facts
+      ansible.builtin.set_fact:
+        lldp_dev2_ip: "{{ (dev2_lldp_ip_raw.stdout | default('')) | trim }}"
+        lldp_dev2_ip6: "{{ (dev2_lldp_ip6_raw.stdout | default('')) | trim }}"
+      changed_when: false
+
+    - name: Classify LLDP IPv4 candidate
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        lldp_ip_class: >-
+          {% set ip = (lldp_dev2_ip | default('')) %}
+          {% if ip == '' %}none
+          {% elif ip.startswith('10.') %}10
+          {% elif ip.startswith('192.168.') %}192_168
+          {% else %}other{% endif %}
+      changed_when: false
+
+    - name: Debug LLDP candidates
+      when: debugging | bool
+      delegate_to: localhost
+      ansible.builtin.debug:
+        msg:
+          - "LLDP digits={{ dev2_lldp_digits | default('') }}"
+          - "LLDP IPv4 candidate={{ lldp_dev2_ip | default('<none>') }}"
+          - "LLDP IPv4 class={{ lldp_ip_class | default('none') }}"
+          - "LLDP IPv6 candidate={{ lldp_dev2_ip6 | default('<none>') }}"
+
+    # ============================ PHASE 0: PRIMARY PATH DECISION ============================
+    - name: Override dev2_host from LLDP when candidate is 192.168.x.x
+      when: (lldp_ip_class | trim) == "192_168" and (lldp_dev2_ip | trim | length > 0)
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_host: "{{ lldp_dev2_ip | trim }}"
+      changed_when: false
+
+    - name: Set connection method initial (direct_lldp if 10.x else tunnel)
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_conn_method: "{{ 'direct_lldp' if ((lldp_ip_class | trim) == '10') else 'tunnel' }}"
+      changed_when: false
+
+    # ============================ PHASE 0: DIRECT LLDP IPv4 AUTH (10.x) ============================
+    - name: Try DEV2 login via direct LLDP IPv4 (10.x) with basicpass
+      when: dev2_conn_method == "direct_lldp"
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        set -e
+        HOST="{{ lldp_dev2_ip }}"
+        sshpass -f basicpass ssh {{ ssh_opts_common }} \
+          -o AddressFamily=inet \
+          "{{ dev2_ssh_user }}@${HOST}" echo OK >/dev/null 2>&1
+      args: { executable: /bin/bash }
+      register: dev2_lldp_try_basicpass
+      changed_when: false
+      ignore_errors: true
+
+    - name: Select basicpass for direct LLDP if succeeded
+      when: dev2_conn_method == "direct_lldp" and dev2_lldp_try_basicpass.rc == 0
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_passfile_used_direct: "basicpass"
+      changed_when: false
+
+    - name: Try DEV2 login via direct LLDP IPv4 (10.x) with basicpass2 (only if first failed)
+      when: dev2_conn_method == "direct_lldp" and (dev2_passfile_used_direct == "NONE")
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        set -e
+        HOST="{{ lldp_dev2_ip }}"
+        sshpass -f basicpass2 ssh {{ ssh_opts_common }} \
+          -o AddressFamily=inet \
+          "{{ dev2_ssh_user }}@${HOST}" echo OK >/dev/null 2>&1
+      args: { executable: /bin/bash }
+      register: dev2_lldp_try_basicpass2
+      changed_when: false
+      ignore_errors: true
+
+    - name: Select basicpass2 for direct LLDP if succeeded
+      when: dev2_conn_method == "direct_lldp" and dev2_passfile_used_direct == "NONE" and dev2_lldp_try_basicpass2.rc == 0
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_passfile_used_direct: "basicpass2"
+      changed_when: false
+
+    # ============================ PHASE 0: TUNNEL PREP (DEV1 temp IP + ARP + tunnel) ============================
+    - name: Add temporary IP on DEV1 (tolerate 'File exists')
+      when: dev2_conn_method == "tunnel"
+      ansible.builtin.raw: >
+        {{ pathprefix }}
+        ip a add {{ dev2_side_ip }} dev {{ dev1_iface }}
+      register: add_ip
+      changed_when: add_ip.rc == 0
+      failed_when: >
+        add_ip.rc != 0
+        and ('File exists' not in (add_ip.stdout | default('')))
+        and ('File exists' not in (add_ip.stderr | default('')))
+
+    - name: Discover DEV2 MAC via bridge fdb on DEV1 (best-effort)
+      when: dev2_conn_method == "tunnel"
+      ansible.builtin.raw: >
+        {{ pathprefix }}
+        bridge fdb show {{ dev1_iface }} | grep eth0 | grep -v permanent | grep master | awk '{print $1}' | head -n1
+      register: dev2_mac_scan
+      changed_when: false
+      failed_when: false
+
+    - name: Capture discovered DEV2 MAC (if any)
+      when: dev2_conn_method == "tunnel"
+      ansible.builtin.set_fact:
+        dev2_mac: "{{ (dev2_mac_scan.stdout | default('') ) | trim }}"
+      changed_when: false
+
+    - name: Clear existing ARP entry for DEV2 on DEV1 (best-effort)
+      when: dev2_conn_method == "tunnel"
+      ansible.builtin.raw: >
+        {{ pathprefix }}
+        ip neigh del {{ dev2_host }} dev {{ dev1_iface }} 2>/dev/null || true
+      changed_when: false
+      failed_when: false
+
+    - name: Add static ARP entry on DEV1 (if MAC discovered; tolerate 'File exists')
+      when: dev2_conn_method == "tunnel" and (dev2_mac | default('') | length > 0)
+      ansible.builtin.raw: >
+        {{ pathprefix }}
+        ip neigh add {{ dev2_host }} lladdr {{ dev2_mac }} dev {{ dev1_iface }} nud permanent
+      register: dev2_arp_add
+      changed_when: dev2_arp_add.rc == 0
+      failed_when: >
+        dev2_arp_add.rc != 0
+        and ('File exists' not in (dev2_arp_add.stdout | default('')))
+        and ('File exists' not in (dev2_arp_add.stderr | default('')))
+
+    - name: Refresh ARP (best-effort)
+      when: dev2_conn_method == "tunnel"
+      ansible.builtin.raw: >
+        {{ pathprefix }}
+        arping -U -I {{ arping_iface }} {{ dev2_side_ip_addr }} -c 3
+      changed_when: false
+      failed_when: false
+
+    - name: Pick a free local TCP port for the tunnel (controller side)
+      when: dev2_conn_method == "tunnel"
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        set -e
+        pick() {
+          for i in $(seq 1 25); do
+            p="$(shuf -i 20000-39999 -n 1)"
+            if command -v ss >/dev/null 2>&1; then
+              if ! ss -ltn | awk '{print $4}' | grep -qE "(:|\.)${p}$"; then
+                echo "$p"; return 0
+              fi
+            else
+              if ! nc -z 127.0.0.1 "$p" >/dev/null 2>&1; then
+                echo "$p"; return 0
+              fi
+            fi
+          done
+          return 1
+        }
+        pick
+      args: { executable: /bin/bash }
+      register: pick_port
+      changed_when: false
+
+    - name: Stop if no free local port was found
+      when: dev2_conn_method == "tunnel" and (pick_port.stdout | trim | length) == 0
+      ansible.builtin.meta: end_host
+
+    - name: Create control dir for SSH ControlMaster
+      when: dev2_conn_method == "tunnel"
+      delegate_to: localhost
+      ansible.builtin.shell: "mktemp -d"
+      args: { executable: /bin/bash }
+      register: mktemp_dir
+      changed_when: false
+
+    - name: Record chosen local port and build ControlMaster socket path
+      when: dev2_conn_method == "tunnel"
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        _local_port: "{{ pick_port.stdout | trim }}"
+        _ctrl_dir: "{{ mktemp_dir.stdout | trim }}"
+        _ctrl_sock: "{{ (mktemp_dir.stdout | trim) }}/ssh_tunnel_ctl"
+      changed_when: false
+
+    - name: Start SSH ControlMaster and forward 127.0.0.1 local_port to DEV2 port 22 via DEV1
+      when: dev2_conn_method == "tunnel"
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        set -e
+        USER="{{ dev1_user }}"
+        HOST="{{ ansible_host | default(inventory_hostname) }}"
+        sshpass -p '{{ dev1_pass }}' ssh -f -N {{ ssh_opts_common }} \
+          -M -S "{{ _ctrl_sock }}" \
+          -L "127.0.0.1:{{ _local_port }}:{{ dev2_host }}:{{ dev2_port }}" \
+          "${USER}@${HOST}"
+      args: { executable: /bin/bash }
+      register: start_tunnel
+      changed_when: true
+
+    - name: Probe TCP reachability to DEV2 through the tunnel (nc)
+      when: dev2_conn_method == "tunnel"
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        set -e
+        nc -z -w5 127.0.0.1 "{{ _local_port }}"
+      args: { executable: /bin/bash }
+      register: nc_probe
+      changed_when: false
+      ignore_errors: true
+
+    - name: Stop if tunnel TCP probe failed
+      when: dev2_conn_method == "tunnel" and nc_probe.rc != 0
+      ansible.builtin.meta: end_host
+
+    - name: Pick DEV2 password for root (tunnel) try basicpass
+      when: dev2_conn_method == "tunnel"
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        set -e
+        PORT="{{ _local_port }}"
+        sshpass -f basicpass ssh {{ ssh_opts_common }} \
+          -o AddressFamily=inet \
+          -p "$PORT" root@127.0.0.1 echo OK >/dev/null 2>&1
+      args: { executable: /bin/bash }
+      register: dev2_try_basicpass
+      changed_when: false
+      ignore_errors: true
+
+    - name: Select basicpass if tunnel login succeeded
+      when: dev2_conn_method == "tunnel" and dev2_try_basicpass.rc == 0
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_passfile_used_tunnel: "basicpass"
+      changed_when: false
+
+    - name: Try DEV2 login through tunnel with basicpass2 (only if first failed)
+      when: dev2_conn_method == "tunnel" and (dev2_passfile_used_tunnel == "NONE")
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        set -e
+        PORT="{{ _local_port }}"
+        sshpass -f basicpass2 ssh {{ ssh_opts_common }} \
+          -o AddressFamily=inet \
+          -p "$PORT" root@127.0.0.1 echo OK >/dev/null 2>&1
+      args: { executable: /bin/bash }
+      register: dev2_try_basicpass2
+      changed_when: false
+      ignore_errors: true
+
+    - name: Select basicpass2 if tunnel login succeeded
+      when: dev2_conn_method == "tunnel" and dev2_passfile_used_tunnel == "NONE" and dev2_try_basicpass2.rc == 0
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_passfile_used_tunnel: "basicpass2"
+      changed_when: false
+
+    # ============================ PHASE 0: SAFETY GUARD (MAC CHECK) ============================
+    - name: Read remote eth0 MAC via tunnel (guard, sanitized)
+      when:
+        - dev2_conn_method == "tunnel"
+        - (dev2_passfile_used_tunnel | default('NONE')) != "NONE"
+        - (dev2_mac | default('') | length) > 0
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        PORT="{{ _local_port }}"
+        sshpass -f "{{ dev2_passfile_used_tunnel }}" ssh {{ ssh_opts_common }} \
+          -p "$PORT" "{{ dev2_ssh_user }}@127.0.0.1" \
+          "cat /sys/class/net/eth0/address 2>/dev/null || ip link show eth0 2>/dev/null" 2>&1
+      args: { executable: /bin/bash }
+      register: dev2_eth0_mac_raw
+      changed_when: false
+      failed_when: false
+
+    - name: Normalize remote eth0 MAC (extract last MAC-like token)
+      when:
+        - dev2_conn_method == "tunnel"
+        - (dev2_passfile_used_tunnel | default('NONE')) != "NONE"
+        - (dev2_mac | default('') | length) > 0
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        remote_eth0_mac: >-
+          {{
+            (
+              (dev2_eth0_mac_raw.stdout | default('') | regex_replace('\r','')) ~ "\n" ~
+              (dev2_eth0_mac_raw.stderr | default('') | regex_replace('\r',''))
+            )
+            | regex_findall('([0-9a-fA-F]{2}(?::[0-9a-fA-F]{2}){5})')
+            | last
+            | default('')
+            | lower
+          }}
+      changed_when: false
+
+    - name: Abort if remote eth0 MAC != discovered DEV2 MAC
+      when:
+        - dev2_conn_method == "tunnel"
+        - (dev2_passfile_used_tunnel | default('NONE')) != "NONE"
+        - (dev2_mac | default('') | length) > 0
+        - (remote_eth0_mac | default('') | length) > 0
+        - (remote_eth0_mac | lower) != (dev2_mac | lower)
+      ansible.builtin.fail:
+        msg: >-
+          Safety stop: tunnel reached wrong device.
+          expected_dev2_mac={{ dev2_mac }}, remote_eth0_mac={{ remote_eth0_mac }}
+
+    # ============================ PHASE 0: FALLBACKS (only if tunnel auth failed) ============================
+    - name: Try DEV2 login via LLDP IPv4 10.x (fallback if tunnel auth failed)
+      when:
+        - dev2_conn_method == "tunnel"
+        - dev2_passfile_used_tunnel == "NONE"
+        - (lldp_dev2_ip | default('')) is match('^10\\.')
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        set -e
+        HOST="{{ lldp_dev2_ip }}"
+        for f in {{ dev2_passfiles | join(' ') }}; do
+          if timeout 20s sshpass -f "$f" ssh {{ ssh_opts_common }} \
+              -o AddressFamily=inet \
+              -o ConnectTimeout=10 \
+              "{{ dev2_ssh_user }}@${HOST}" echo OK >/dev/null 2>&1; then
+            echo "$f"; exit 0
+          fi
+        done
+        echo "NONE"; exit 1
+      args: { executable: /bin/bash }
+      register: dev2_auth_lldp4
+      changed_when: false
+      failed_when: false
+      ignore_errors: true
+
+    - name: Record LLDP IPv4 fallback decision
+      when:
+        - dev2_conn_method == "tunnel"
+        - dev2_passfile_used_tunnel == "NONE"
+        - (lldp_dev2_ip | default('')) is match('^10\\.')
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_passfile_used_lldp4: "{{ (dev2_auth_lldp4.rc == 0) | ternary((dev2_auth_lldp4.stdout | trim), 'NONE') }}"
+      changed_when: false
+
+    - name: Copy DEV2 passfiles to DEV1 for IPv6 nested SSH (last resort)
+      when:
+        - dev2_conn_method == "tunnel"
+        - dev2_passfile_used_tunnel == "NONE"
+        - dev2_passfile_used_lldp4 == "NONE"
+        - (lldp_dev2_ip6 | default('') | length) > 0
+      ansible.builtin.copy:
+        src: "{{ item }}"
+        dest: "/tmp/{{ item }}"
+        mode: "0600"
+      loop: "{{ dev2_passfiles }}"
+      ignore_errors: true
+
+    - name: Try DEV2 login via LLDP IPv6 (nested SSH through DEV1; last resort)
+      when:
+        - dev2_conn_method == "tunnel"
+        - dev2_passfile_used_tunnel == "NONE"
+        - dev2_passfile_used_lldp4 == "NONE"
+        - (lldp_dev2_ip6 | default('') | length) > 0
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        set -e
+        IP6="{{ lldp_dev2_ip6 }}"
+        for f in {{ dev2_passfiles | join(' ') }}; do
+          if sshpass -p '{{ dev1_pass }}' ssh {{ ssh_opts_common }} \
+              "{{ dev1_user }}@{{ ansible_host|default(inventory_hostname) }}" \
+              "timeout {{ ssh_timeout }}s sshpass -f '/tmp/${f}' ssh \
+                 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR \
+                 -o PubkeyAuthentication=no \
+                 -o PreferredAuthentications=password -o NumberOfPasswordPrompts=1 \
+                 -o ConnectTimeout={{ ssh_timeout }} \
+                 '{{ dev2_ssh_user }}@\[${IP6}%{{ dev1_iface }}\]' 'echo OK' " \
+              >/dev/null 2>&1; then
+            echo "$f"; exit 0
+          fi
+        done
+        echo "NONE"; exit 1
+      args: { executable: /bin/bash }
+      register: dev2_auth_lldp6
+      changed_when: false
+      failed_when: false
+      ignore_errors: true
+
+    - name: Record LLDP IPv6 fallback decision
+      when:
+        - dev2_conn_method == "tunnel"
+        - dev2_passfile_used_tunnel == "NONE"
+        - dev2_passfile_used_lldp4 == "NONE"
+        - (lldp_dev2_ip6 | default('') | length) > 0
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_passfile_used_lldp6: "{{ (dev2_auth_lldp6.rc == 0) | ternary((dev2_auth_lldp6.stdout | trim), 'NONE') }}"
+      changed_when: false
+
+    # ============================ PHASE 0: FINAL DECISION + WRAPPER FACTS ============================
+    - name: Decide final DEV2 connection mode (direct_lldp > tunnel > lldp4 > lldp6)
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_conn_final: >-
+          {%- if dev2_conn_method == 'direct_lldp' and (dev2_passfile_used_direct | default('NONE')) != 'NONE' -%}
+            direct_lldp
+          {%- elif dev2_conn_method == 'tunnel' and (dev2_passfile_used_tunnel | default('NONE')) != 'NONE' -%}
+            tunnel
+          {%- elif (dev2_passfile_used_lldp4 | default('NONE')) != 'NONE' -%}
+            lldp4_fallback
+          {%- elif (dev2_passfile_used_lldp6 | default('NONE')) != 'NONE' -%}
+            lldp6_via_dev1
+          {%- else -%}
+            none
+          {%- endif -%}
+      changed_when: false
+
+    - name: Abort if all DEV2 connection methods failed
+      when: dev2_conn_final == "none"
+      ansible.builtin.fail:
+        msg: >
+          DEV2 unreachable: tunnel auth={{ dev2_passfile_used_tunnel | default('n/a') }},
+          direct auth={{ dev2_passfile_used_direct | default('n/a') }},
+          lldp4 auth={{ dev2_passfile_used_lldp4 | default('n/a') }},
+          lldp6 auth={{ dev2_passfile_used_lldp6 | default('n/a') }}.
+
+    - name: Debug final connectivity decision
+      when: debugging | bool
+      delegate_to: localhost
+      ansible.builtin.debug:
+        msg:
+          - "dev2_conn_final={{ dev2_conn_final }}"
+          - "tunnel passfile={{ dev2_passfile_used_tunnel | default('n/a') }}"
+          - "direct passfile={{ dev2_passfile_used_direct | default('n/a') }}"
+          - "lldp4 passfile={{ dev2_passfile_used_lldp4 | default('n/a') }}"
+          - "lldp6 passfile={{ dev2_passfile_used_lldp6 | default('n/a') }}"
+          - "tunnel target={{ dev2_host }}:{{ dev2_port }} (forwarded to 127.0.0.1:{{ _local_port | default('na') }})"
+          - "lldp ipv4={{ lldp_dev2_ip | default('') }}"
+          - "lldp ipv6={{ lldp_dev2_ip6 | default('') }}"
+
+    - name: Build DEV2 exec wrapper (controller-side) for Phase 1 commands
+      delegate_to: localhost
+      ansible.builtin.set_fact:
+        dev2_exec_cmd: |
+          set -e
+          MODE="{{ dev2_conn_final }}"
+          if [ -z "${DEV2_CMD:-}" ]; then
+            echo "ERROR: DEV2_CMD is empty" >&2
+            exit 2
+          fi
+
+          case "$MODE" in
+            tunnel)
+              PORT="{{ _local_port | default('') }}"
+              PASS="{{ dev2_passfile_used_tunnel }}"
+              sshpass -f "$PASS" ssh {{ ssh_opts_common }} \
+                -o AddressFamily=inet \
+                -p "$PORT" "{{ dev2_ssh_user }}@127.0.0.1" \
+                "{{ pathprefix }} ${DEV2_CMD}" 2>&1
+              ;;
+            direct_lldp)
+              HOST="{{ lldp_dev2_ip }}"
+              PASS="{{ dev2_passfile_used_direct }}"
+              sshpass -f "$PASS" ssh {{ ssh_opts_common }} \
+                -o AddressFamily=inet \
+                "{{ dev2_ssh_user }}@${HOST}" \
+                "{{ pathprefix }} ${DEV2_CMD}" 2>&1
+              ;;
+            lldp4_fallback)
+              HOST="{{ lldp_dev2_ip }}"
+              PASS="{{ dev2_passfile_used_lldp4 }}"
+              sshpass -f "$PASS" ssh {{ ssh_opts_common }} \
+                -o AddressFamily=inet \
+                "{{ dev2_ssh_user }}@${HOST}" \
+                "{{ pathprefix }} ${DEV2_CMD}" 2>&1
+              ;;
+            lldp6_via_dev1)
+              IP6="{{ lldp_dev2_ip6 }}"
+              F="{{ dev2_passfile_used_lldp6 }}"
+              sshpass -p "{{ dev1_pass }}" ssh {{ ssh_opts_common }} \
+                "{{ dev1_user }}@{{ ansible_host | default(inventory_hostname) }}" \
+                "sshpass -f '/tmp/${F}' ssh \
+                   -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR \
+                   -o PubkeyAuthentication=no \
+                   -o PreferredAuthentications=password -o NumberOfPasswordPrompts=1 \
+                   -o ConnectTimeout={{ ssh_timeout }} \
+                   '{{ dev2_ssh_user }}@\[${IP6}%{{ dev1_iface }}\]' \
+                   '{{ pathprefix }} '"${DEV2_CMD}" 2>&1"
+              ;;
+            *)
+              echo "ERROR: unknown MODE=$MODE" >&2
+              exit 3
+              ;;
+          esac
+      changed_when: false
+
+
+    ##########################################################################
+    # PHASE 1: ROLLBACK (execute stop, remove scripts, journal + custom field)
+    ##########################################################################
+
+    - name: Run stopblock twice with 2s pause
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        export DEV2_CMD='/root/stopblock.sh >/dev/null 2>&1 || true; sleep 2; /root/stopblock.sh >/dev/null 2>&1 || true'
+        {{ dev2_exec_cmd }}
+      args:
+        executable: /bin/bash
+      changed_when: true
+
+    - name: Remove block scripts from DEV2
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        export DEV2_CMD='rm -f /root/stopblock.sh /root/startblock.sh'
+        {{ dev2_exec_cmd }}
+      args:
+        executable: /bin/bash
+      changed_when: true
+
+    - name: Publish redirect and block removal journal
+      delegate_to: localhost
+      uri:
+        url: "http://{{ rmq_host }}:{{ rmq_port }}/api/exchanges/{{ rmq_vhost | urlencode }}/{{ rmq_exchange | urlencode }}/publish"
+        method: POST
+        user: "{{ rmq_user }}"
+        password: "{{ rmq_pass }}"
+        force_basic_auth: true
+        status_code: 200
+        headers: { content-type: "application/json" }
+        body_format: json
+        body:
+          properties: { content_type: "application/json" }
+          routing_key: "{{ control_queue }}"
+          payload: "{{ {
+            'inscope_device': (ansible_hostname | default(inventory_hostname)),
+            'task_name': 'journal_add',
+            'task_result': 'redirect and block removed'
+          } | to_json }}"
+          payload_encoding: "string"
+      changed_when: false
+
+    - name: Set NetBox custom field indoor_rnb to cleared
+      delegate_to: localhost
+      uri:
+        url: "http://{{ rmq_host }}:{{ rmq_port }}/api/exchanges/{{ rmq_vhost | urlencode }}/{{ rmq_exchange | urlencode }}/publish"
+        method: POST
+        user: "{{ rmq_user }}"
+        password: "{{ rmq_pass }}"
+        force_basic_auth: true
+        status_code: 200
+        headers: { content-type: "application/json" }
+        body_format: json
+        body:
+          properties: { content_type: "application/json" }
+          routing_key: "{{ control_queue }}"
+          payload: "{{ {
+            'inscope_device': (ansible_hostname | default(inventory_hostname)),
+            'task_name': 'custom_field_set',
+            'task_add1': 'indoor_rnb',
+            'task_result': 'cleared'
+          } | to_json }}"
+          payload_encoding: "string"
+      changed_when: false
+
+
+  post_tasks:
+    - name: Cleanup note
+      delegate_to: localhost
+      ansible.builtin.debug:
+        msg: "Cleanup: closing tunnel, removing temp IP, removing staged passfiles (best-effort)"
+      changed_when: false
+
+    - name: Close SSH ControlMaster (best-effort)
+      when: dev2_conn_method | default('') == "tunnel"
+      delegate_to: localhost
+      ansible.builtin.shell: |
+        ssh -S "{{ _ctrl_sock | default('/dev/null') }}" -O exit 2>/dev/null || true
+      args: { executable: /bin/bash }
+      changed_when: false
+      ignore_errors: true
+
+    - name: Remove tunnel control dir (best-effort)
+      when: dev2_conn_method | default('') == "tunnel"
+      delegate_to: localhost
+      ansible.builtin.file:
+        path: "{{ _ctrl_dir | default('/tmp/none') }}"
+        state: absent
+      ignore_errors: true
+
+    - name: Remove staged passfiles from DEV1 (best-effort)
+      when: dev2_conn_method | default('') == "tunnel"
+      ansible.builtin.raw: >
+        {{ pathprefix }}
+        rm -f /tmp/basicpass /tmp/basicpass2 2>/dev/null || true
+      changed_when: false
+      failed_when: false
+
+    - name: Remove temporary IP on DEV1 (tolerate 'Cannot assign requested address')
+      when: dev2_conn_method | default('') == "tunnel"
+      ansible.builtin.raw: >
+        {{ pathprefix }}
+        ip a del {{ dev2_side_ip }} dev {{ dev1_iface }}
+      register: del_ip
+      changed_when: del_ip.rc == 0
+      failed_when: >
+        del_ip.rc != 0
+        and ('Cannot assign requested address' not in (del_ip.stdout | default('')))
+        and ('Cannot assign requested address' not in (del_ip.stderr | default('')))