8cc7f90c98
A record written to stdout carries no priority, so journald files the whole stream at one level and the swarm log store shows `info` whatever level `tracing` gave it. Under a systemd unit the process's stdout already *is* the journal, so the fix is to speak the journal protocol directly and let each record carry its own severity. New `hive-log` crate holds the one sink chooser, called by `hive-c0re`, `hive-agent` and `swarm-controller`. It builds the same `EnvFilter` those binaries always built, then installs exactly one layer — never both, since a journald layer stacked on the `fmt` layer under a unit stores every record twice. The choice is an fstat compare, not a presence test: a child inherits `$JOURNAL_STREAM` even when its own stdout was redirected elsewhere, so the variable existing proves nothing. The crate parses `dev:inode` out of it and compares both numbers against an fstat of stdout, the descriptor the `fmt` layer writes to by default. No match, unset, or unparseable takes the `fmt` branch. A journald layer that fails to construct despite a match falls back to `fmt` and warns through it — a process must never fail to start because of its logger.
14 lines
284 B
TOML
14 lines
284 B
TOML
[package]
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name = "hive-log"
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edition.workspace = true
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version.workspace = true
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readme = "README.md"
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[lints]
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workspace = true
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[dependencies]
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rustix = { workspace = true }
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tracing = { workspace = true }
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tracing-journald = { workspace = true }
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tracing-subscriber = { workspace = true }
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