是否可以使用TextFSM一次记录多行？

Question

我想解析通过Netmiko使用TextFSM执行的Checkpoint防火墙cphaprob -a if。最终生成的列表格式不正确。

我已经尝试了很多TextFSM命令组合，但是也许我只是不了解它如何正常工作。

原始命令输出

下面是cphaprob -a if原始输出。我想解析虚拟上下文（例如“ vcont 0”），接口名称（例如“ bond0”），虚拟接口（例如“ bond0.2121”）及其主机名（例如“ 10.105.0.42”）。

vcont 0:
------
Required interfaces: 2
Required secured interfaces: 1

eth0       UP                    non sync(non secured), multicast
eth1       UP                    sync(secured), broadcast

Virtual cluster interfaces: 1

eth0            10.105.0.42        


vcont 1:
------
Required interfaces: 3
Required secured interfaces: 1

eth1       UP                    sync(secured), broadcast
bond0      UP                    non sync(non secured), multicast, bond Load Sharing  (bond0.2101)
bond1      UP                    non sync(non secured), multicast, bond Load Sharing  (bond1.2126)

Virtual cluster interfaces: 3

bond0.2121      10.65.29.21         
bond1.2122      10.65.29.22        
bond1.2123      10.65.29.23        


vcont 2:
------
Required interfaces: 3
Required secured interfaces: 1

eth1       UP                    sync(secured), broadcast
bond1      UP                    non sync(non secured), multicast, bond Load Sharing  (bond1.2127)
bond0      UP                    non sync(non secured), multicast, bond Load Sharing  (bond0.2102)

Virtual cluster interfaces: 2

bond1.4242      10.65.29.42        
bond0.4243      10.65.29.43         

---

TextFSM模板

# template for ```cphaprob -a if``` command.
Value Context (\S+\s\d+)
Value List Interface (\S+)
Value List VirtualInterface (\S+)
Value List IPv4 (\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3})

Start
  ^${Context}:
  ^${Interface}.*(UP|DOWN|Disconnected)
  ^Virtual cluster interfaces: \d+ -> Cluster

Cluster
  ^${VirtualInterface}\s+${IPv4} -> Record Start

预期结果

$ python tests/test_checkpoint_functions.py 
[['vcont 0', ['eth0', 'eth1'], ['eth0'], ['10.105.0.42']],
 ['vcont 1', ['eth1', 'bond0', 'bond1'], ['bond0.2121', 'bond1.2122', 'bond1.2123'], ['10.65.29.21', '10.65.29.22', '10.65.29.23']],
 ['vcont 2', ['eth1', 'bond1', 'bond0'], ['bond1.4242', 'bond0.4243'], ['10.65.29.42', '10.65.29.43']]]

---

实际结果

$ python tests/test_checkpoint_functions.py 
[['vcont 0', ['eth0', 'eth1'], ['eth0'], ['10.105.0.42']],
 ['vcont 1', ['eth1', 'bond0', 'bond1'], ['bond0.2121'], ['10.65.29.21']],
 ['vcont 2', ['eth1', 'bond1', 'bond0'], ['bond1.4242'], ['10.65.29.42']]]

如您所见，我仅获得虚拟接口及其对应IP地址的第一个实例。原因可能是在^${VirtualInterface}\s+${IPv4} -> Record Start之后立即在“群集”状态的模板中进行记录。我只是不知道如何在相应的列表中获取所有虚拟接口和IP地址。

Answer 1

Value Context (\s+\s\d+)
Value List Interface (\S+)
Value List VirtualInterface (\S+)
# Add escaping for "."
Value List IPv4 (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})

Start
  ^${Context}:
  ^${Interface}.*(UP|DOWN|Disconnected)
  ^Virtual cluster interfaces: \d+ -> Cluster

Cluster
  ^${VirtualInterface}\s+${IPv4}
  # The reason for the multiple VirtualInterface and IPv4 entries
  # is because you Record after each match.
  # Instead, you can Record after you have matched all entries.
  # I look for what I know will be the start of the next entry in table,
  # and use Continue.Record.
  # Continue will continue looking for matches for the current line that is being parsed,
  # but will move onto the next regex line, instead of starting back at the top of State.
  # Another thing about Continue, is that you cannot do that and have a State Change,
  # which is why I change to the Start state afterwards
  ^.+: -> Continue.Record
  ^${Context}: -> Start