chore(buglog): log bug-1872, bug-1874..1877 fixed (44173f74)

bug-1873 (systemd pid race) is held back until pc13v's environment is recorded.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.wolf/bugs/bug-1875.md

@@ -0,0 +1,54 @@
+---
+id: "bug-1875"
+status: "fixed"
+status_updated: "2026-09-28"
+status_note: ""
+component: "apiserver"
+severity: "noise"
+timestamp: "2026-09-28T03:52:37Z"
+last_seen: "2026-09-28T03:58:49Z"
+occurrences: 1
+files: ["src/frontend/apiserver/middleware/startserver.go"]
+tags: ["apiserver", "auth", "pam", "logging"]
+related: []
+fix_commits: ["44173f74"]
+---
+
+# bug-1875: apiserver warns PAM needs root when the auth provider is not pam
+
+## Description
+**Observed:**
+```
+2026-09-28T11:52:50.031+0800 WARN Not running as root — PAM authentication will not work. OK for dev/testing.
+```
+**Expected:** no warning when the configured auth provider is not pam (the default config/auth.yaml has `provider: config_file`).
+**Impact:** a misleading WARN on every non-root apiserver start; noise only.
+**Found by:** user report from a pc13v HA deploy, 2026-09-28
+
+## Environment
+- OS: no /etc/os-release; Docker container; NixOS kernel; kernel Linux 6.18.33 x86_64
+- libc: glibc 2.42-47 (interpreter /nix/store/wb6rhpznjfczwlwx23zmdrrw74bayxw4-glibc-2.42-47/lib/ld-linux-x86-64.so.2, from src/xce.build/frontend/apiserver/xce_apiserver)
+- Toolchain: gcc (GCC) 15.2.0, meson 1.9.1
+- Build: release-style Go build via meson (xce.build/frontend/apiserver/xce_apiserver)
+- Code: scheduler-framework @ 8cadeeb2 (last commit without the fix)
+- Deployment: first seen on pc13v: 3-node HA (ctrl-1..3) + scheduler + apiserver + real root xcecd under systemd, deploy dir /tmp/xce-ha-deploy, 2026-09-28 11:52 +0800 (pc13v's OS, libc and exact commit were not recorded; the values above are from the reproduction on this dev host, same nix toolchain)
+
+## Reproduction
+1. Start the apiserver as a non-root user with the default src/frontend/apiserver/config/auth.yaml (provider: config_file)
+2. The warning is logged at start
+- Frequency: deterministic (every non-root start)
+- Evidence: the xcecd/scheduler/controller/apiserver logs pasted in the user's report, 2026-09-28 (quoted above)
+
+## Root cause
+StartServer() (src/frontend/apiserver/middleware/startserver.go) warned whenever the uid was not 0, without looking at which auth provider cmd/main.go had initialized (auth.GlobalProvider) -- only the PAM provider needs root.
+
+## Fix
+rootWarning(uid, provider) returns the warning only for provider "pam" and a non-root uid; StartServer() passes auth.GlobalProvider.Name().
+
+## Verification
+- Test: TestRootWarning in src/frontend/apiserver/middleware/startserver_test.go (5 uid/provider cases): RED before the fix (rootWarning did not exist), GREEN after; run with `CGO_ENABLED=0 go test ./middleware/ -run TestRootWarning` (the package's TestLoadJobs needs a live apiserver and is not part of the normal Go test set)
+- Suites: full ASAN build (xce-build all): 113/113 suites after the updated scheduler picker-registration test; controller 1250/0, harness 141/0, worker diskstats 4/0, scheduler picker wiring 11/0 + picker registration 4/0, apiserver TestRootWarning PASS
+- Live: pending: user retest on pc13v (apiserver log)
+
+## References
+- Related: none