Backport of fix: use net.JoinHostPort for remaining Envoy admin URLs into release/1.9.x#1070
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Backport
This PR is auto-generated from #1066 to be assessed for backporting due to the inclusion of the label backport/1.9.
The below text is copied from the body of the original PR.
Description
Follow-up to #1064.
This updates the remaining Envoy admin URLs in
pkg/envoy/proxy.goto usenet.JoinHostPortinstead of manually formattinghost:portpairs.The previous
fmt.Sprintf("http://%s:%v/...")pattern is not safe for all admin bind addresses, especially IPv6 addresses.Drain()andQuit()were already updated to usenet.JoinHostPort; this change applies the same fix to:DumpConfig()via/config_dump?include_edsReady()via/readyThis keeps Envoy admin endpoint construction consistent across the proxy manager and avoids malformed URLs when the admin address is not a simple IPv4/hostname value.
Testing
pkg/envoy/proxy_test.goOverview of commits