gluster_peer_status.rb

output = 'peer count: 6

ip address:     1.2.3.4
status:         up
client version: 1.2.3

ip address:     1.2.3.5
status:         up
client version: 1.3.0

ip address:     1.2.3.10
status:         down
client version: 1.2.2

ip address:     1.2.3.55
status:         up
client version: 1.2.3
'

peer_strings = output.split("\n\n")
# pop / shift off the first element (peer count)
# https://ruby-doc.org/core-2.3.3/Array.html#method-i-shift
peer_strings.shift

def peer_hash_from_string(str)
  # find values in string output and assign them to variables using named captures
  # https://ruby-doc.org/core-2.3.3/Regexp.html#class-Regexp-label-Capturing
  /^ip address:\s+(?<ip_address>[\d\.]+)$/ =~ str
  /^status:\s+(?<status>[\w]+)$/ =~ str
  /^client version:\s+(?<client_version>[\d\.]+)$/ =~ str
  # return the hash
  {
    ip_address: ip_address,
    status: status,
    client_version: client_version
  }
end

peers = []
peer_strings.each do |str|
  peers << peer_hash_from_string(str)
end

require 'pp'
pp peers

require 'rspec'
describe 'gluster peer status output parsing' do
  it do
    expect(peer_strings.length).to eq(4)
  end
  it do
    expect(peers.length).to eq(4)
    expect(peers[1]).to eq(
      ip_address:     '1.2.3.5',
      status:         'up',
      client_version: '1.3.0'
    )
  end
end

rspec-output

tmp $ rspec gluster_peer_status.rb
[{:ip_address=>"1.2.3.4", :status=>"up", :client_version=>"1.2.3"},
 {:ip_address=>"1.2.3.5", :status=>"up", :client_version=>"1.3.0"},
 {:ip_address=>"1.2.3.10", :status=>"down", :client_version=>"1.2.2"},
 {:ip_address=>"1.2.3.55", :status=>"up", :client_version=>"1.2.3"}]
..

Finished in 0.00201 seconds (files took 0.31168 seconds to load)
2 examples, 0 failures