twitter / zktraffic / 105

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Pull #16

travis-ci

Add support for excluding/including IPs in zk-dump

Sometimes you only care about sniffing traffic to a given cluster. This
commit adds an option for that:

$ sudo zk-dump --iface lo --include-host some-cluster.domain.tld

When using the --include-host flag, only requests to and from the A and AAAA
records backing some-cluster.domain.tld will be captured.

Similarly, you could be interested in capturing all ZK traffic on a box
_except_ for what's going to a given cluster:

$ sudo zk-dump --iface lo --exclude-host some-cluster.domain.tld

Both flags can be used multiple times to include or exclude more than one
host. Though you can't mix include and exclude flags.

Signed-off-by: Raul Gutierrez S <rgs@twitter.com>

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