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Previous version was not working on Windows due to a crash.
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All these metrics, except publishers & consumers, are handled by
rabbitmq_global_metrics, so we currently have duplicates. As I started
removing these, I realised that tests were written in Java - why not
Erlang? - and they seemed way too complicated for what was needed. After
the new rabbitmq_global_metrics, we are left with 2 metrics, and all the
extra code simply doesn't justify them. I am proposing that we add them to
rabbit_global_counters as gauges. Let's discuss @dcorbacho @acogoluegnes
Signed-off-by: Gerhard Lazu <gerhard@lazu.co.uk>
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Stream common library
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This reverts commit 179e1b8d39a2ce2536d2a5eb41f3b1f24e51af53.
This new version is not entirely backwards compatible and our
test suites will need adapting.
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Ra systems
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when the rabbitmq-components.mk file is used in non-monorepo
plugins. Note that with this change all deps of type git_rmq-subfolder
must target the same branches for it to behave properly.
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Also adjust the references in rabbitmq-components.mk to account for
post monorepo locations
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use v1.x branch of ra
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This allows including additional applications or third party
plugins when creating a release, running the broker locally,
or just building from the top-level Makefile.
To include Looking Glass in a release, for example:
$ make package-generic-unix ADDITIONAL_PLUGINS="looking_glass"
A Docker image can then be built using this release and will
contain Looking Glass:
$ make docker-image
Beware macOS users! Applications such as Looking Glass include
NIFs. NIFs must be compiled in the right environment. If you
are building a Docker image then make sure to build the NIF
on Linux! In the two steps above, this corresponds to Step 1.
To run the broker with Looking Glass available:
$ make run-broker ADDITIONAL_PLUGINS="looking_glass"
This commit also moves Looking Glass dependency information
into rabbitmq-components.mk so it is available at all times.
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The configuration remains the same for the end-user. The only exception
is the log root directory: it is now set through the `log_root`
application env. variable in `rabbit`. People using the Cuttlefish-based
configuration file are not affected by this exception.
The main change is how the logging facility is configured. It now
happens in `rabbit_prelaunch_logging`. The `rabbit_lager` module is
removed.
The supported outputs remain the same: the console, text files, the
`amq.rabbitmq.log` exchange and syslog.
The message text format slightly changed: the timestamp is more precise
(now to the microsecond) and the level can be abbreviated to always be
4-character long to align all messages and improve readability. Here is
an example:
2021-03-03 10:22:30.377392+01:00 [dbug] <0.229.0> == Prelaunch DONE ==
2021-03-03 10:22:30.377860+01:00 [info] <0.229.0>
2021-03-03 10:22:30.377860+01:00 [info] <0.229.0> Starting RabbitMQ 3.8.10+115.g071f3fb on Erlang 23.2.5
2021-03-03 10:22:30.377860+01:00 [info] <0.229.0> Licensed under the MPL 2.0. Website: https://rabbitmq.com
The example above also shows that multiline messages are supported and
each line is prepended with the same prefix (the timestamp, the level
and the Erlang process PID).
JSON is also supported as a message format and now for any outputs.
Indeed, it is possible to use it with e.g. syslog or the exchange. Here
is an example of a JSON-formatted message sent to syslog:
Mar 3 11:23:06 localhost rabbitmq-server[27908] <0.229.0> - {"time":"2021-03-03T11:23:06.998466+01:00","level":"notice","msg":"Logging: configured log handlers are now ACTIVE","meta":{"domain":"rabbitmq.prelaunch","file":"src/rabbit_prelaunch_logging.erl","gl":"<0.228.0>","line":311,"mfa":["rabbit_prelaunch_logging","configure_logger",1],"pid":"<0.229.0>"}}
For quick testing, the values accepted by the `$RABBITMQ_LOGS`
environment variables were extended:
* `-` still means stdout
* `-stderr` means stderr
* `syslog:` means syslog on localhost
* `exchange:` means logging to `amq.rabbitmq.log`
`$RABBITMQ_LOG` was also extended. It now accepts a `+json` modifier (in
addition to the existing `+color` one). With that modifier, messages are
formatted as JSON intead of plain text.
The `rabbitmqctl rotate_logs` command is deprecated. The reason is
Logger does not expose a function to force log rotation. However, it
will detect when a file was rotated by an external tool.
From a developer point of view, the old `rabbit_log*` API remains
supported, though it is now deprecated. It is implemented as regular
modules: there is no `parse_transform` involved anymore.
In the code, it is recommended to use the new Logger macros. For
instance, `?LOG_INFO(Format, Args)`. If possible, messages should be
augmented with some metadata. For instance (note the map after the
message):
?LOG_NOTICE("Logging: switching to configured handler(s); following "
"messages may not be visible in this log output",
#{domain => ?RMQLOG_DOMAIN_PRELAUNCH}),
Domains in Erlang Logger parlance are the way to categorize messages.
Some predefined domains, matching previous categories, are currently
defined in `rabbit_common/include/logging.hrl` or headers in the
relevant plugins for plugin-specific categories.
At this point, very few messages have been converted from the old
`rabbit_log*` API to the new macros. It can be done gradually when
working on a particular module or logging.
The Erlang builtin console/file handler, `logger_std_h`, has been forked
because it lacks date-based file rotation. The configuration of
date-based rotation is identical to Lager. Once the dust has settled for
this feature, the goal is to submit it upstream for inclusion in Erlang.
The forked module is calld `rabbit_logger_std_h` and is based
`logger_std_h` in Erlang 23.0.
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More responsive when the system is overloaded with file calls.
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`lager_util:expand_path/1` use changes are
due to erlang-lager/lager#540
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Once the monorepo is built, from within it one can run `make
fetch-topic-branch-${TOPIC_BRANCH}` then `make
topic-branch-${TOPIC_BRANCH}` to rebase the commits from all the
sources back onto the monorepo
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Add GitHub Actions workflows for Erlang/OTP 22.3 & 23.0.
The workflows run tests for each component that is now part of this
repo, with test suite parallelization specifically for the rabbit
erlang application.
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