[yackushevas]

feature Support IPv6 binding in meta-service

Background

doris_cloud networking is IPv4-only: inet_aton/uint32_t CIDR, sockaddr_in, AF_INET-only interface enumeration, and the brpc server binds 0.0.0.0.

What problem does this PR solve?

Issue Number: close #66701
Related PR: #14063 (IPv6 for BE/FE, cloud left out)
PR Type: Feature

Problem Summary: an IPv6 priority_networks (e.g. ::/0) crashes doris_cloud at startup, and even with a valid config the meta service cannot bind IPv6, forcing dual-stack in IPv6-only environments. Port the BE IPv6 implementation to cloud; IPv4 behavior unchanged.

Details

• Scope: doris_cloud only (meta service, recycler).
• Design: CIDR, InetAddress and get_host_port are ported from be/src/util; get_local_ip() follows BE BackendOptions semantics (the CIDR family selects IPv4/IPv6); the brpc starter binds get_service_bind_address() via butil::str2endpoint, as BE does; registry endpoints bracket IPv6 literals.
• Usage: priority_networks = fd00::/64
• Default behavior: unchanged for empty priority_networks (my_ip_cstr, 0.0.0.0).
• Compatibility: loopback fallback stays 127.0.0.1 on dual-stack hosts; ::1 counts as loopback for enable_loopback_address_for_ms; the /0 mask is accepted (BE behavior).

Testing

• New GetLocalHostIPv6Test in cloud/test/network_util_test.cpp.
• The modified network_util.cpp, compiled standalone, ran against live dual-stack interfaces (::1, fe80::, a real fd00::/64 ULA): 12/12 selection/bind/format cases and 8/8 CIDR edge cases pass; ::/0 no longer crashes.
• run-cloud-ut.sh on a Linux stand: in progress (stand toolchain issues, unrelated to this change); CI validates.

Notes for Reviewers

A loopback address can now be selected directly by a CIDR (BE semantics; the returned string is unchanged, e.g. 127.0.0.1/8). str2endpoint("[::0]", port) is valid in brpc 1.4.0: ExtendedEndPoint::create parses the bracketed form before the IPv4-only str2ip path. In a mixed-version window, an old binary reading a new IPv6 registry entry dials "fd00::1:5000" (no brackets) and skips that best-effort peer refresh; non-fatal and self-healing after the rolling upgrade.

Release note

doris_cloud supports IPv6 priority_networks and binds [::0] when IPv6 is selected, enabling IPv6-only storage-compute deployments without dual-stack workarounds.

Check List (For Author)

• Behavior changed: Yes (see Details).
• Does this need documentation: No (priority_networks semantics match the BE documentation).
• Pre-submission status: Partially verified: standalone runtime checks passed; cloud UT running on a stand and in CI.

AI Disclosure

• Tool: OpenCode (GLM-5.3).
• Generated: Code, tests and this description.
• Human review: Diff reviewed by the author across multiple review passes.