[pbs-devel] [PATCH v2 proxmox-backup 0/5] fix 4788: statically linked proxmox-backup-client

[Christian Ebner]

As discussed in issue #4788 [0], statically linking of the
`proxmox-backup-client` still suffers from possible incompatible
dependencies on the NSS module libraries, further described in
[1].

This patch series provides the means to statically compile the client
with a workaround for the NSS lib limitation by relying on
`hickory-dns` [2], as suggested by Thomas.
The hickory-resolver is used for name resolution with the statically
compiled binary instead of the default `getaddrinfo` based
`GaiResolver`.

Since hickory-resolver depends on `ipconfig` for Windows targets when
the `system-config` feature is enabled (required to read nameservers
from `/etc/resolv.conf`), also the dependency on `ipconfig` is
required by cargo. To workaround this, a dummy crate is registered in
the cargo registry.

[0] https://bugzilla.proxmox.com/show_bug.cgi?id=4788
[1] https://sourceware.org/glibc/wiki/FAQ#Even_statically_linked_programs_need_some_shared_libraries_which_is_not_acceptable_for_me.__What_can_I_do.3F
[2] https://github.com/hickory-dns/hickory-dns

Link to previous version of the patches:
https://lore.proxmox.com/pbs-devel/20240928094256.153991-1-c.ebner@proxmox.com/

proxmox:

Christian Ebner (1):
  http: client: make https connector generic over resolver

 proxmox-http/Cargo.toml              |  1 +
 proxmox-http/debian/control          |  6 ++++--
 proxmox-http/src/client/connector.rs | 17 ++++++++++++-----
 proxmox-http/src/client/simple.rs    |  3 ++-
 4 files changed, 19 insertions(+), 8 deletions(-)

proxmox-backup:

Christian Ebner (4):
  fix: 4788: Makefile: target for statically linked client binary
  Makefile: switch path based on build mode and target
  cargo: add stubs for `ipconfig` windows build dependency
  client: http: Use custom resolver for statically linked binary

 Cargo.toml                       |  3 ++
 Makefile                         | 15 +++++-
 cargo-stubs/ipconfig/Cargo.toml  |  6 +++
 cargo-stubs/ipconfig/src/main.rs |  2 +
 pbs-client/Cargo.toml            |  1 +
 pbs-client/src/http_client.rs    | 81 ++++++++++++++++++++++++++++++--
 6 files changed, 103 insertions(+), 5 deletions(-)
 create mode 100644 cargo-stubs/ipconfig/Cargo.toml
 create mode 100644 cargo-stubs/ipconfig/src/main.rs

-- 
2.39.5