{
    "scheme":"http",
    "name":"safebox-esp-web_web-console-cns2waf_5009",
    "desc":"Created by apisix-ingress-controller, DO NOT modify it manually",
    "id":"a48bc649",
    "update_time":1659003639,
    "create_time":1659003457,
    "nodes":[
        {
            "weight":100,
            "priority":0,
            "host":"2409:XXXX:XXXX:2000:0:1:afd:7d20",
            "port":4009
        },
        {
            "weight":100,
            "priority":0,
            "host":"2409:XXXX:XXXX:2000:0:1:afd:7d68",
            "port":4009
        }
    ],
    "type":"roundrobin",
    "labels":{
        "managed-by":"apisix-ingress-controller"
    },
    "hash_on":"vars",
    "pass_host":"pass"
}

-- local host_def_pat = "^\\*?[0-9a-zA-Z-._]+$"
local host_def_pat = "^\\*?[0-9a-zA-Z-._\\[\\]:]+$"

            local has_ipv6 = string.find(server.host, ":", 1, true)
            if (has_ipv6 ~= nil) then
                local is_ipv6_plus = string.find(server.host, "[", 1, true)
                if (is_ipv6_plus == nil) then
                    server.host = "["..server.host.."]"
                end
            end

            local ok, err = balancer.set_current_peer(server.host, server.port, pool_opt)

2022/07/28 10:07:09 [error] 51#51: *13796 [lua] balancer.lua:370: run(): failed to set server peer [[2409:XXXX:XXXX:2000:0:1:afd:7d65:4009]:nil] err: invalid IPv6 address while connecting to upstream, client: 10.253.91.92, server: _, request: "GET /web-console-cnswaf/ HTTP/1.1", host: "xxx.xxx.com"