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    <p>Here is a rough first pass at parsing this data:</p> <pre><code>from pyparsing import * # basic punctuation - useful in parsing, but suppress from results LBRACE,RBRACE = map(Suppress, "{}") # some simple terminals ipv4_address = Regex(r"\d{1,3}(\.\d{1,3}){3}") ipv6_address = Regex(r"[0-9a-fA-F:]+") ip_address = ipv4_address | ipv6_address integer = Word(nums).setParseAction(lambda t:int(t[0])) # config parameters that take 0 or 1 arguments config_param0 = oneOf("ha_suspend inhibit_on_failure") config_param1 = oneOf("""lb_algo b_kind protocol delay_loop weight connect_port connect_timeout""") param_arg = integer | Word(alphanums) config_param = Group(config_param1 + param_arg) | config_param0 # definitions for a real_server tcp_check = ("TCP_CHECK" + LBRACE + OneOrMore(config_param) + RBRACE) real_defn = Group("real_server" + ip_address("rip_address") + integer("rport") + LBRACE + ZeroOrMore(config_param)("params") + tcp_check("tcp_check") + RBRACE ) # definiton for a virtual_server virtual_defn = ("virtual_server" + ip_address("vip_address") + integer("vport") + LBRACE + ZeroOrMore(config_param)("params") + OneOrMore(real_defn)("real_defns") + RBRACE ) # skip over comments comment = '#' + restOfLine virtual_defn.ignore(comment) # parse the input string and dump out the pieces confdata = virtual_defn.parseString(conf) print confdata.dump() for rip in confdata.real_defns: print print rip.dump() </code></pre> <p>Prints the following:</p> <pre><code>['virtual_server', '192.168.1.1', 80, ['lb_algo', 'wrrl'], ... - params: [['lb_algo', 'wrrl'], ['b_kind', 'DR'], ['protocol', 'TCP'], 'ha_suspend', ['delay_loop', 10]] - real_defns: [['real_server', '192.168.1.100', 80, ['weight', ... - vip_address: 192.168.1.1 - vport: 80 ['real_server', '192.168.1.100', 80, ['weight', 100], 'inhibit_on_fa... - params: [['weight', 100], 'inhibit_on_failure'] - rip_address: 192.168.1.100 - rport: 80 - tcp_check: ['TCP_CHECK', ['connect_port', 80], ['connect_timeout', 5]] ['real_server', '192.168.1.101', 80, ['weight', 100], 'inhibit_on_fai... - params: [['weight', 100], 'inhibit_on_failure'] - rip_address: 192.168.1.101 - rport: 80 - tcp_check: ['TCP_CHECK', ['connect_port', 80], ['connect_timeout', 5]] </code></pre>
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    1. POParsing keepalived.conf, translate to json
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