fix: export Excluded VIPs (evips) with JSON output"

[dmachard]

This pull request addresses an issue with exporting excluded VIPs in JSON format.

Currently, when using JSON output, the keepalived_vrrp_excluded_state metric is missing because the excluded_vips field is absent from the Keepalived JSON output.
This fix ensures that the key, named evips, is correctly included in the JSON output, allowing the metric to be properly exported.

[dmachard]

@clwluvw ok for you ?

[clwluvw]

Could you please comment on what version you tested against? I guess we missed a test case for json parsing.

[dmachard]

keepalived 2.2.4

[
    {"data":
        {
            "iname":"VI_IPV4",
            "dont_track_primary":0,
            "skip_check_adv_addr":0,
            "strict_mode":0,
            "vmac_ifname":"",
            "ifp_ifname":"ens224",
            "master_priority":100,
            "last_transition":1742377372.387751,
            "garp_delay":5,
            "garp_refresh":0,
            "garp_rep":5,
            "garp_refresh_rep":1,
            "garp_lower_prio_delay":5,
            "garp_lower_prio_rep":5,
            "lower_prio_no_advert":0,
            "higher_prio_send_advert":0,
            "vrid":137,
            "base_priority":100,
            "effective_priority":100,
            "vipset":true,
            "promote_secondaries":false,
            "adver_int":1,
            "master_adver_int":1,
            "accept":1,
            "nopreempt":true,
            "preempt_delay":0,
            "state":2,
            "wantstate":2,
            "version":2,
            "smtp_alert":false,
            "notify_deleted":false,
            "vips":["10.0.0.1 dev ens224 scope global set"],
            "evips":["10.0.0.2 dev ens224 scope global set",
            "10.0.0.41 dev ens224 scope global set",
            "10.0.0.7 dev ens224 scope global set"],
            "track_ifp":["dummy0"],
            "track_script":["'\/etc\/keepalived\/keepalived_check.sh' 'keepalive.' '10.0.0.1'"],
            "auth_type":1,
            "auth_data":"keep137"},
            "stats":{"advert_rcvd":347,
            "advert_sent":4230522,
            "become_master":7,
            "release_master":6,
            "packet_len_err":0,
            "advert_interval_err":0,
            "ip_ttl_err":0,
            "invalid_type_rcvd":0,
            "addr_list_err":0,
            "invalid_authtype":0,
            "authtype_mismatch":0,
            "auth_failure":0,
            "pri_zero_rcvd":14,
            "pri_zero_sent":6
        }
    }
]

[clwluvw]

Thanks! I tried to search the keepalived's code for any references to excluded_vips but couldn’t find any. It seems this was an oversight from the start.