Playbook to rename network interfaces - now published in https://opendev.org/openstack/tripleo-upgrade/src/commit/c864f47764b17a08e1417638f6043e56441c25ab/files/rename-nics.yaml

rename-nics.yaml

---
# Final published location: https://access.redhat.com/solutions/4067471
- name: Rename network interfaces
  hosts: all
  become: true
  vars:
    src_prefix: "eth"
    dst_prefix: "em"
    osnet_conf: "/etc/os-net-config/config.json"
    src_interfaces: "{{ ansible_interfaces | select('match', src_prefix ~ '.*') | sort | list }}"
    undercloud_conf: "~/undercloud.conf"
  tasks:
    - debug:
        msg: "{{ src_interfaces }}"


    - name: Update udev rules
      tags:
        - udev
      lineinfile:
        line: >
          SUBSYSTEM=="net",
          ACTION=="add",
          DRIVERS=="?*",
          ATTR{address}=="{{ ansible_facts[item]['perm_macaddress'] | default(ansible_facts[item]['macaddress']) }}",
          NAME="{{ item | replace(src_prefix, dst_prefix) }}"
        path: /etc/udev/rules.d/70-rhosp-persistent-net.rules
        create: true
      with_items: "{{ src_interfaces | reject('match', '^.*\\..*$' | list }}"


    - name: Rename ifcfg files
      tags:
        - ifcfg
      block:
        - name: Check that src_prefix files exists
          stat:
            path: /etc/sysconfig/network-scripts/ifcfg-{{ item }}
          register: nic_result
          with_items: "{{ src_interfaces }}"

        - name: Copy ifcfg files using dst_prefix
          copy:
            remote_src: true
            src: "{{ item.stat.path }}"
            dest: "{{ item.stat.path | replace(src_prefix, dst_prefix) }}"
          with_items: "{{ nic_result.results }}"
          when: item.stat.exists
          loop_control:
            label: "{{ item.item }}"

        - name: Edit NAME in new network-script files
          lineinfile:
            regexp: "^NAME=.*"
            line: "NAME={{ item.item | replace(src_prefix, dst_prefix) }}"
            path: "{{ item.stat.path | replace(src_prefix, dst_prefix) }}"
          with_items: "{{ nic_result.results }}"
          when: item.stat.exists
          loop_control:
            label: "{{ item.item }}"

        - name: Edit DEVICE in new network-script files
          lineinfile:
            regexp: "^DEVICE=.*"
            line: "DEVICE={{ item.item | replace(src_prefix, dst_prefix) }}"
            path: "{{ item.stat.path | replace(src_prefix, dst_prefix) }}"
          with_items: "{{ nic_result.results }}"
          when: item.stat.exists
          loop_control:
            label: "{{ item.item }}"

        - name: Backup old ifcfg network-script files
          copy:
            remote_src: true
            src: "{{ item.stat.path }}"
            dest: "{{ item.stat.path }}.bak"
          with_items: "{{ nic_result.results }}"
          when: item.stat.exists
          loop_control:
            label: "{{ item.item }}"

        - name: Remove old ifcfg network-script files
          file:
            path: "{{ item.stat.path }}"
            state: absent
          with_items: "{{ nic_result.results }}"
          when: item.stat.exists
          loop_control:
            label: "{{ item.item }}"


    - name: Rename route files
      tags:
        - routes
      block:
        - name: Check that route files exists
          stat:
            path: /etc/sysconfig/network-scripts/route-{{ item }}
          register: route_result
          with_items: "{{ src_interfaces }}"

        - name: Copy route files using dst_prefix
          copy:
            remote_src: true
            src: "{{ item.stat.path }}"
            dest: "{{ item.stat.path | replace(src_prefix, dst_prefix) }}"
          with_items: "{{ route_result.results }}"
          when: item.stat.exists
          loop_control:
            label: "{{ item.item }}"

        - name: Update dst_prefix in route files that use IP command arguments format
          replace:
            regexp: "{{ src_prefix }}"
            replace: "{{ dst_prefix }}"
            path: "{{ item.stat.path | replace(src_prefix, dst_prefix) }}"
          with_items: "{{ route_result.results }}"
          when: item.stat.exists
          loop_control:
            label: "{{ item.item }}"

        - name: Backup old route files
          copy:
            remote_src: true
            src: "{{ item.stat.path }}"
            dest: "{{ item.stat.path }}.bak"
          with_items: "{{ route_result.results }}"
          when: item.stat.exists
          loop_control:
            label: "{{ item.item }}"

        - name: Remove old route files
          file:
            path: "{{ item.stat.path }}"
            state: absent
          with_items: "{{ route_result.results }}"
          when: item.stat.exists
          loop_control:
            label: "{{ item.item }}"


    - name: Perform a final regex for any remaining src_prefix in ifcfg files
      tags:
        - ifcfg
      block:
        - name: Get a list of all ifcfg files
          find:
            paths: /etc/sysconfig/network-scripts/
            patterns: 'ifcfg-*'
            excludes: '*.bak'
          register: ifcfg_files

        - name: Perform final regex on ifcfg files
          replace:
            path: "{{ item[0].path }}"
            regexp: "{{ item[1] }}"
            replace: "{{ item[1] | replace(src_prefix, dst_prefix) }}"
          with_nested:
            - "{{ ifcfg_files.files }}"
            - "{{ src_interfaces }}"
          loop_control:
            label: "{{ item[1] }} -> {{ item[0].path }}"


    - name: Replace interface name in TripleO configuration files
      tags:
        - tripleo
      block:
        - name: Check if undercloud.conf exists
          stat:
            path: "{{ undercloud_conf }}"
          register: undercloud_conf_stat

        - name: Replace interface name in undercloud.conf
          replace:
            path: "{{ undercloud_conf }}"
            regexp: "{{ item }}"
            replace: "{{ item | replace(src_prefix, dst_prefix) }}"
          when: undercloud_conf_stat.stat.exists
          with_items: "{{ src_interfaces }}"

        - name: Check if os-net-config's config.json exists
          stat:
            path: "{{ osnet_conf }}"
          register: osnet_conf_stat

        - name: Replace interface name in config.json
          replace:
            path: "{{ osnet_conf }}"
            regexp: "{{ item }}"
            replace: "{{ item | replace(src_prefix, dst_prefix) }}"
          when: osnet_conf_stat.stat.exists
          with_items: "{{ src_interfaces }}"