您的模式是地址之间缺少逗号,，您可以尝试以下模式：
addresses: \[(\d\.\d\.\d\.\d\,?)*\]
参见here演示。

您可以编写转义第一个\[的模式，并可选地重复匹配,，后跟数字和点。
如果要匹配1个或多个数字，可以使用\d+

\baddresses: \[\d\.\d\.\d\.\d(?:,\d\.\d\.\d\.\d)*]

说明

• \baddresses: \[匹配单词addresses后跟: [
• \d\.\d\.\d\.\d匹配4个数字，中间带一个点
• (?:,\d\.\d\.\d\.\d)*可选重复匹配,和前一个模式
• ]逐字匹配

参见regex demo。

通过 regex 更新此类文件中的IP是非常危险的。在这个简单的例子中有两个属性 addresses。读取YAML字典，更新并写回它会更实用。
声明要更新的内容。例如，从 ethernets 更新每个接口中的名称服务器的地址

ethernets_update:
    nameservers:
      addresses: [127.0.0.53, 8.8.8.8, 8.8.4.4]

给定用于测试的（固定）文件

shell> cat /tmp/netcfg.yaml 
network:
  version: 2
  renderer: networkd
  ethernets:
    enp0s3:
      dhcp4: no
      addresses: [192.168.1.222/24]
      gateway4: 192.168.1.1
      nameservers:
        addresses: [8.8.8.8,8.8.4.4]

声明变量

netcfg: "{{ netcfg_yaml.content|b64decode|from_yaml }}"

然后读文件

- slurp:
        src: /tmp/netcfg.yaml
      register: netcfg_yaml

给予

netcfg:
    network:
      ethernets:
        enp0s3:
          addresses: [192.168.1.222/24]
          dhcp4: false
          gateway4: 192.168.1.1
          nameservers:
            addresses: [8.8.8.8, 8.8.4.4]
      renderer: networkd
      version: 2

更新字典

ethernets: "{{ dict(netcfg.network.ethernets.keys()|
                      zip(netcfg.network.ethernets.values()|
                          product([ethernets_update])|map('combine'))) }}"
  netcfg_update: "{{ [netcfg, {'network': {'ethernets': ethernets}}]|
                     combine(recursive=true) }}"

给予

netcfg_update:
    network:
      ethernets:
        enp0s3:
          addresses: [192.168.1.222/24]
          dhcp4: false
          gateway4: 192.168.1.1
          nameservers:
            addresses: [127.0.0.53, 8.8.8.8, 8.8.4.4]
      renderer: networkd
      version: 2

写入文件

- copy:
        dest: /tmp/netcfg.yaml
        content: |
          {{ netcfg_update|to_yaml }}

给予

shell> cat /tmp/netcfg.yaml 
network:
  ethernets:
    enp0s3:
      addresses: [192.168.1.222/24]
      dhcp4: false
      gateway4: 192.168.1.1
      nameservers:
        addresses: [127.0.0.53, 8.8.8.8, 8.8.4.4]
  renderer: networkd
  version: 2

完整的测试行动手册示例

- hosts: localhost

  vars:

    ethernets_update:
      nameservers:
        addresses: [127.0.0.53, 8.8.8.8, 8.8.4.4]

    netcfg: "{{ netcfg_yaml.content|b64decode|from_yaml }}"
    ethernets: "{{ dict(netcfg.network.ethernets|dict2items|map(attribute='key')|
                        zip(netcfg.network.ethernets|dict2items|map(attribute='value')|
                            product([ethernets_update])|map('combine'))) }}"

    netcfg_update: "{{ [netcfg, {'network': {'ethernets': ethernets}}]|
                       combine(recursive=true) }}"

  tasks:

    - slurp:
        src: /tmp/netcfg.yaml
      register: netcfg_yaml
    - debug:
        var: netcfg

    - debug:
        var: ethernets
    - debug:
        var: netcfg_update|to_yaml

    - copy:
        dest: /tmp/netcfg.yaml
        content: |
          {{ netcfg_update|to_yaml }}