* Use journal-gatewayd's new /boots endpoint to list boots
Current method we use for getting boots has several known downsides, for
example it can miss some incomplete boots and the performance might be
worse than what we could get by using Systemd directly. Systemd was
missing a method to get list boots through the journal-gatewayd but that
should be addressed by the new /boots endpoint added in [1] which
returns application/json-seq response containing all boots as reported
in `journalctl --list-boots`.
Implement Supervisor methods to parse this format and use the endpoint
at first, falling back to the old method if it fails.
[1] https://github.com/systemd/systemd/pull/37574
* Log info instead of warning when /boots is not present
Co-authored-by: Stefan Agner <stefan@agner.ch>
* Split records only by RS instead of LF in journal_boots_reader
* Strip only RS, json.loads is fine with whitespace
---------
Co-authored-by: Stefan Agner <stefan@agner.ch>
* Bump Supervisor to Python 3.13
* Update ruff configuration to 0.9.1
Adjust pyproject.toml for ruff 0.9.1. Also make sure that latest version
of ruff is used in pre-commit.
* Set default configuration for pytest-asyncio
* Run ruff check
* Drop deprecated decorator no_type_check_decorator
The upstream PR (https://github.com/python/cpython/issues/106309) says
this never got really implemented by type checkers.
* Bump devcontainer to latest release
* Return cursor of the first host logs entry via headers
Return first entry's cursor via custom `X-First-Cursor` header that can
be consumed by the client and used for continual requesting of the
historic logs. Once the first fetch returns data, the cursor can be
supplied as the first argument to the Range header in another call,
fetching accurate slice of the journal with the previous log entries
using the `Range: entries=cursor[[:num_skip]:num_entries]` syntax.
Let's say we fetch logs with the Range header `entries=:-19:20` (to
fetch very last 20 lines of the logs, see below why not
`entries:-20:20`) and we get `cursor50` as the reply (the actual value
will be much more complex and with no guaranteed format). To fetch
previous slice of the logs, we use `entries=cursor50:-20:20`, which
would return 20 lines previous to `cursor50` and `cursor30` in the
cursor header. This way we can go all the way back to the history.
One problem with the cursor is that it's not possible to determine when
the negative num_skip points beyond the first log entry. In that case
the client either needs to know what the first entry is (via
`entries=:0:1`) or can iterate naively and stop once two subsequent
requests return the same first cursor.
Another caveat, even though it's unlikely it will be hit in real usage,
is that it's not possible to fetch the last line only - if no cursor is
provided, negative num_skip argument is needed, and in that case we're
pointing one record back from the current cursor, which is the previous
record. The least we can return without knowing any cursor is thus
`entries=👎2` (where the `2` can be omitted, however with
`entries=👎1` we would lose the last line). This also explains why
different `num_skip` and `num_entries` must be used for the first fetch.
* Fix typo (fallback->callback)
* Refactor journal_logs_reader to always return the cursor
* Update tests for new cursor handling
* Use Journal Export Format for host (advanced) logs
Add methods for handling Journal Export Format and use it for fetching
of host logs. This is foundation for colored streaming logs for other
endpoints as well.
* Make pylint happier - remove extra pass statement
* Rewrite journal gateway tests to mock ClientResponse's StreamReader
* Handle connection refused error when connecting to journal-gatewayd
* Use SYSTEMD_JOURNAL_GATEWAYD_SOCKET global path also for connection
* Use parsing algorithm suggested by @agners in review
* Fix timestamps in formatting, always use UTC for now
* Add tests for Accept header in host logs
* Apply suggestions from @agners
Co-authored-by: Stefan Agner <stefan@agner.ch>
* Bail out of parsing earlier if field is not in required fields
* Fix parsing issue discovered in the wild and add test case
* Make verbose formatter more tolerant
* Use some bytes' native functions for some minor optimizations
* Move MalformedBinaryEntryError to exceptions module, add test for it
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Co-authored-by: Stefan Agner <stefan@agner.ch>
