bug: no healthy etcd endpoint available

[ipanocloud]

Current Behavior

APIsix successfully connects to etcd.

Expected Behavior

No response

Error Logs

`

• 2023/06/15 18:02:21 [error] 43#43: *54 [lua] server-info.lua:167: failed to fetch etcd version: http://apisix-etcd.apisix-sit.svc.cluster.local:2379: timeout, context: ngx.timer
• 2023/06/15 18:02:22 [error] 44#44: *33 [lua] config_etcd.lua:568: no healthy etcd endpoint available, next retry after 2s, context: ngx.timer
• 2023/06/15 18:02:22 [error] 44#44: *32 [lua] config_etcd.lua:568: no healthy etcd endpoint available, next retry after 2s, context: ngx.timer
• 2023/06/15 18:02:22 [error] 44#44: *37 [lua] config_etcd.lua:568: no healthy etcd endpoint available, next retry after 2s, context: ngx.timer

`

Steps to Reproduce

1. restart apisix
2. The error log indicates a failure in connecting to etcd.

Environment

• APISIX version (run apisix version): 2.15.0
• Operating system (run uname -a):
• OpenResty / Nginx version (run openresty -V or nginx -V):
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info): 3.5.0
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):