The manager runs with a read-only root filesystem and the seed ISO
writer stages files in a temp directory, so the first in-cluster Create
failed with "creating iso writer: read-only file system". Mount a 64 MiB
emptyDir on /tmp.
That error is classified ErrPermanent by writeSeed, yet hostPool.call
treated every non-libvirt error as a transport failure and dropped the
cached SSH connection, redialling on each retry. Errors that already
carry a provider sentinel are local verdicts, not evidence about the
link; leave the connection alone for those.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
A tracingAPI decorator wraps the 17-method libvirt seam and logs one
"libvirt call" line per RPC after it returns: method, the identifiers it
was given, curated results, duration, and on failure the error with its
libvirt code, name and message. At V(2) the same line carries the domain
and volume XML, metadata and addresses; upload bodies are never logged.
The pool applies it in call() when V(1) is enabled and logs connect,
dial-failure and drop events, taking the caller's logger explicitly like
every other helper in the package.
The integration test installs a testr logger at KVM_TEST_LOG_LEVEL
(default 1) so the trace interleaves with t.Log output, which also ends
the "log.SetLogger(...) was never called" warning. Docs gained a Logging
section and the test env var; the KVM provider execution log records run
4 (guest hang at GRUB) that prompted this.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Per-host connection pool over SSH with the libvirt unix socket forwarded
through the session, lazy dial and redial after disconnect, context
cancellation for go-libvirt's context-less RPCs, handshake deadline and
SSH keepalives. Error classification onto the provider taxonomy. Tested
with a fake dialer and an in-process SSH server that forwards unix sockets.
Step 3 of docs/plans/2026-09-04-1404-kvm-provider.md.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
kacerrandClaude Fable 5.1