4.3. 为 undercloud 节点使用可预测的 NIC 名称

流程

1. 以 stack 用户的身份登录 undercloud。

2. 创建名为 playbook-nics.yaml 的 Ansible playbook，并将以下内容复制到 playbook 中：

   ---
   - name: Rename eth devices
     hosts: all
     become: yes
     vars:
       prefix: "em"
       undercloud_conf: "/home/stack/undercloud.conf"
       osnet_conf: "/etc/os-net-config/config.json"
     tasks:
       - set_fact:
           eth_interfaces: "{{ ansible_interfaces | select('match','eth.*') | list }}"
       - debug:
           msg: "{{ eth_interfaces }}"
       - name: Update udev rules
         lineinfile:
           line: "SUBSYSTEM==\"net\", ACTION==\"add\", DRIVERS==\"?*\", ATTR{address}==\"{{ ansible_facts[item]['perm_macaddress'] | default(ansible_facts[item]['macaddress']) }}\", NAME=\"{{ item|replace('eth',prefix) }}\""
           path: /etc/udev/rules.d/70-rhosp-persistent-net.rules
           create: True
         with_items: "{{ eth_interfaces }}"
       - name: Rename eth files
         block:
           - name: Check that eth files exists
             stat:
               path: /etc/sysconfig/network-scripts/ifcfg-{{ item }}
             register: nic_result
             with_items: "{{ eth_interfaces }}"
           - name: Copy nic files using the new prefix
             copy:
               remote_src: True
               src: "{{ item.stat.path }}"
               dest: "{{ item.stat.path|replace('eth',prefix) }}"
             with_items: "{{ nic_result.results }}"
             when: item.stat.exists
           - name: Edit NAME in new network-script files
             lineinfile:
               regexp: "^NAME=.*"
               line: "NAME={{ item.item|replace('eth',prefix) }}"
               path: "{{ item.stat.path|replace('eth',prefix) }}"
             with_items: "{{ nic_result.results }}"
             when: item.stat.exists
           - name: Edit DEVICE in new network-script files
             lineinfile:
               regexp: "^DEVICE=.*"
               line: "DEVICE={{ item.item|replace('eth',prefix) }}"
               path: "{{ item.stat.path|replace('eth',prefix) }}"
             with_items: "{{ nic_result.results }}"
             when: item.stat.exists
           - name: Backup old eth 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
           - name: Remove old eth network-script files
             file:
               path: "{{ item.stat.path }}"
               state: absent
             with_items: "{{ nic_result.results }}"
             when: item.stat.exists
       - name: Rename route files
         block:
           - name: Check that route files exists
             stat:
               path: /etc/sysconfig/network-scripts/route-{{ item }}
             register: route_result
             with_items: "{{ eth_interfaces }}"
           - name: Copy route files using the new prefix
             copy:
               remote_src: True
               src: "{{ item.stat.path }}"
               dest: "{{ item.stat.path|replace('eth',prefix) }}"
             with_items: "{{ route_result.results }}"
             when: item.stat.exists
           - name: Update prefix in route files that use IP command arguments format
             replace:
               regexp: "eth"
               replace: "{{ prefix }}"
               path: "{{ item.stat.path|replace('eth',prefix) }}"
             with_items: "{{ route_result.results }}"
             when: item.stat.exists
           - 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
           - name: Remove old route files
             file:
               path: "{{ item.stat.path }}"
               state: absent
             with_items: "{{ route_result.results }}"
             when: item.stat.exists
       - name: Perform a final regex for any remaining eth prefixes in ifcfg files
         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('eth',prefix) }}"
             with_nested:
               - "{{ ifcfg_files.files }}"
               - "{{ eth_interfaces }}"
       - name: Replace interface name in files referencing old eth interface
         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: 'eth(\d+)'
               replace: "{{ prefix }}\\1"
             when: undercloud_conf_stat.stat.exists
           - 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: 'eth(\d+)'
               replace: "{{ prefix }}\\1"
             when: osnet_conf_stat.stat.exists
       - name: Patch vlan devices
         block:
           - name: Check that vlan files exists
             stat:
               path: /etc/sysconfig/network-scripts/ifcfg-{{ item }}
             register: nic_result
             when: item.startswith("vlan")
             with_items: "{{ ansible_interfaces }}"
           - name: Backup old vlan network-script files
             copy:
               remote_src: True
               src: "{{ item.stat.path }}"
               dest: "{{ item.stat.path }}.bak"
             when: item.item.startswith("vlan") and item.stat.exists
             with_items: "{{ nic_result.results }}"
           - name: Edit PHYSDEV in new network-script files
             replace:
               path: "{{ item.stat.path }}"
               regexp: "^PHYSDEV=eth"
               replace: "PHYSDEV={{ prefix }}"
             when: item.item.startswith("vlan") and item.stat.exists
             with_items: "{{ nic_result.results }}"

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   注意

   您将在升级过程中使用此 playbook 在稍后阶段重命名 overcloud NIC。

3. 在 undercloud 上运行 playbook-nics.yaml playbook：

   $ ansible-playbook -c local -i localhost, playbook-nics.yaml

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   playbook 将新的 NIC 前缀设置为 em。要设置不同的 NIC 前缀，请在运行 playbook 时设置 前缀 变量：

   $ ansible-playbook -c local -i localhost, -e prefix="mynic" ~/playbook-nics.yaml

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   NIC 更改仅在 Leapp 升级过程完成且重新引导节点后应用。