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ansible - 来自已注册 var 输出的 Ansible 地图过滤器

问题描述

我通过一个已注册的变量从一台服务器获取 dhcpd.leases 文件的完整副本。带有 ansible 调试的输出如下所示：

TASK [Show passive storage nodes info] *************************************************************************************************************************************************************
ok: [10.241.55.2] => {
    "msg": [
        "# The format of this file is documented in the dhcpd.leases(5) manual page.",
        "# This lease file was written by isc-dhcp-4.2.2",
        "",
        "lease 10.241.55.165 {",
        "  starts 4 2019/12/12 09:30:37;",
        "  ends 4 2019/12/12 21:30:37;",
        "  tstp 4 2019/12/12 21:30:37;",
        "  cltt 4 2019/12/12 09:30:37;",
        "  binding state free;",
        "  hardware ethernet b4:d1:35:00:04:50;",
        "  uid \"\\001\\264\\3215\\000\\004P\";",
        "}",
        "lease 10.241.55.163 {",
        "  starts 1 2019/12/16 08:10:56;",
        "  ends 1 2019/12/16 20:10:56;",
        "  tstp 1 2019/12/16 20:10:56;",
        "  cltt 1 2019/12/16 08:10:56;",
        "  binding state free;",
        "  hardware ethernet b4:d1:35:00:03:d7;",
        "}",
        "lease 10.241.55.159 {",
        "  starts 1 2019/12/16 08:52:20;",
        "  ends 1 2019/12/16 20:52:20;",
        "  tstp 1 2019/12/16 20:52:20;",
        "  cltt 1 2019/12/16 08:52:20;",
        "  binding state free;",
        "  hardware ethernet b4:d1:35:00:03:b4;",
        "}",
        "lease 10.241.55.166 {",
        "  starts 1 2019/12/16 08:54:38;",
        "  ends 1 2019/12/16 20:54:38;",
        "  tstp 1 2019/12/16 20:54:38;",
        "  cltt 1 2019/12/16 08:54:38;",
        "  binding state free;",
        "  hardware ethernet b4:d1:35:00:04:63;",
        "}",
        "lease 10.241.55.164 {",
        "  starts 1 2019/12/16 10:48:10;",
        "  ends 1 2019/12/16 22:48:10;",
        "  tstp 1 2019/12/16 22:48:10;",
        "  cltt 1 2019/12/16 10:48:10;",
        "  binding state free;",
        "  hardware ethernet b4:d1:35:00:04:4e;",
        "}",
        "lease 10.241.55.143 {",
        "  starts 5 2020/02/14 04:38:09;",
        "  ends 5 2020/02/14 16:38:09;",
        "  cltt 5 2020/02/14 04:38:09;",
        "  binding state active;",
        "  next binding state free;",
        "  rewind binding state free;",
        "  hardware ethernet 08:94:ef:9c:80:4a;",
        "  client-hostname \"linux-compute-e7d573cb9fda4e689939e21a7843c4fb\";",
        "}",
        "lease 10.241.55.148 {",
        "  starts 5 2020/02/14 05:03:08;",
        "  ends 5 2020/02/14 17:03:08;",
        "  cltt 5 2020/02/14 05:03:08;",
        "  binding state active;",
        "  next binding state free;",
        "  rewind binding state free;",
        "  hardware ethernet 00:e0:ec:ca:44:84;",
        "  client-hostname \"linux-storage-4391fc6548764de5a15a46b432d3cd37\";",
        "}",
        "lease 10.241.55.235 {",
        "  starts 5 2020/02/14 05:20:28;",
        "  ends 5 2020/02/14 17:20:28;",
        "  cltt 5 2020/02/14 05:20:28;",
        "  binding state active;",
        "  next binding state free;",
        "  rewind binding state free;",
        "  hardware ethernet 00:e0:ec:ca:45:74;",
        "  client-hostname \"linux-storage-58aba44ac09d4f639b9374b9142b1a53\";",
        "}",
        "lease 10.241.55.141 {",
        "  starts 5 2020/02/14 06:01:04;",
        "  ends 5 2020/02/14 18:01:04;",
        "  cltt 5 2020/02/14 06:01:04;",
        "  binding state active;",
        "  next binding state free;",
        "  rewind binding state free;",
        "  hardware ethernet 08:94:ef:9c:80:6c;",
        "  client-hostname \"linux-compute-d228bc79357c4c8b87c280f9efae6ba6\";",
        "}",
        "lease 10.241.55.236 {",
        "  starts 5 2020/02/14 06:12:28;",
        "  ends 5 2020/02/14 18:12:28;",
        "  cltt 5 2020/02/14 06:12:28;",
        "  binding state active;",
        "  next binding state free;",
        "  rewind binding state free;",
        "  hardware ethernet 00:e0:ec:ca:45:75;",
        "  client-hostname \"linux-storage-58aba44ac09d4f639b9374b9142b1a53\";",
        "}",
        "lease 10.241.55.140 {",
        "  starts 5 2020/02/14 06:13:18;",
        "  ends 5 2020/02/14 18:13:18;",
        "  cltt 5 2020/02/14 06:13:18;",
        "  binding state active;",
        "  next binding state free;",
        "  rewind binding state free;",
        "  hardware ethernet 08:94:ef:9c:80:24;",
        "  client-hostname \"linux-compute-d0a9a76a7b5249048f78642220a1958c\";",
        "}",

无论如何映射提交的租约ip +客户端主机名然后基于它进行过滤并将ips严格放在库存文件中？我知道我可以直接获取 ip，但是有些服务器有 4 个 ip，因此它们具有相同的主机名。而不是将所有 4 个 ip 都放入清单中，我只需要他们的一个 ip（不管是哪一个），并且我正在尝试根据主机名进行过滤。此外，输出中的某些条目没有客户端主机名，因此理想情况下应该忽略这些条目。

这个问题与我在这里发布的另一个问题相似： Ansible jina2 template, filter output based on uniqueness

但是有了这个，我正在尝试一种不同的方法。

到目前为止，我尝试过的是：

 debug:
   msg: "{{ p_storage_ips.stdout | map(attribute='client-hostname' | list) }}"

但我什么也没得到： TASK [显示被动存储节点信息]

ok: [10.241.55.2] => {
    "msg": "<generator object do_map at 0x7f40e52785f0>"
}

也试过这样：

   - set_fact:
       dhcp_hosts: "{{ dhcp.stdout_lines | selectattr('client-hostname', 'defined') | map(attribute='lease') | list }}"

任何帮助将非常感激！

标签： ansibleansible-2.xansible-inventory

解决方案

没关系，我发现过滤直接从 bash 发送到 ansible 的输出会更容易。最后我想出了这个：

 awk '!seen[$0]++' /var/lib/dhcp/dhcpd.leases | grep -vE -- 'ends|starts|tstp|cltt|uid|bind|hardware' | grep -B1 storage | awk '{print $2}' | grep '^[0-9]'

这导致存储节点有 2 个 IP 地址（共 8 个）。

10.241.55.148
10.241.55.235

这并不能解决最初的问题，但至少提供了所需的答案。

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