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| -rw-r--r-- | vendor/github.com/sirupsen/logrus/README.md | 124 |
1 files changed, 59 insertions, 65 deletions
diff --git a/vendor/github.com/sirupsen/logrus/README.md b/vendor/github.com/sirupsen/logrus/README.md index cbe8b6962..a4796eb07 100644 --- a/vendor/github.com/sirupsen/logrus/README.md +++ b/vendor/github.com/sirupsen/logrus/README.md @@ -1,22 +1,24 @@ # Logrus <img src="http://i.imgur.com/hTeVwmJ.png" width="40" height="40" alt=":walrus:" class="emoji" title=":walrus:"/> [](https://travis-ci.org/sirupsen/logrus) [](https://godoc.org/github.com/sirupsen/logrus) Logrus is a structured logger for Go (golang), completely API compatible with -the standard library logger. [Godoc][godoc]. **Please note the Logrus API is not -yet stable (pre 1.0). Logrus itself is completely stable and has been used in -many large deployments. The core API is unlikely to change much but please -version control your Logrus to make sure you aren't fetching latest `master` on -every build.** - -**Seeing weird case-sensitive problems?** Unfortunately, the author failed to -realize the consequences of renaming to lower-case. Due to the Go package -environment, this caused issues. Regretfully, there's no turning back now. +the standard library logger. + +**Seeing weird case-sensitive problems?** It's in the past been possible to +import Logrus as both upper- and lower-case. Due to the Go package environment, +this caused issues in the community and we needed a standard. Some environments +experienced problems with the upper-case variant, so the lower-case was decided. Everything using `logrus` will need to use the lower-case: `github.com/sirupsen/logrus`. Any package that isn't, should be changed. -I am terribly sorry for this inconvenience. Logrus strives hard for backwards -compatibility, and the author failed to realize the cascading consequences of -such a name-change. To fix Glide, see [these +To fix Glide, see [these comments](https://github.com/sirupsen/logrus/issues/553#issuecomment-306591437). +For an in-depth explanation of the casing issue, see [this +comment](https://github.com/sirupsen/logrus/issues/570#issuecomment-313933276). + +**Are you interested in assisting in maintaining Logrus?** Currently I have a +lot of obligations, and I am unable to provide Logrus with the maintainership it +needs. If you'd like to help, please reach out to me at `simon at author's +username dot com`. Nicely color-coded in development (when a TTY is attached, otherwise just plain text): @@ -54,9 +56,40 @@ time="2015-03-26T01:27:38-04:00" level=warning msg="The group's number increased time="2015-03-26T01:27:38-04:00" level=debug msg="Temperature changes" temperature=-4 time="2015-03-26T01:27:38-04:00" level=panic msg="It's over 9000!" animal=orca size=9009 time="2015-03-26T01:27:38-04:00" level=fatal msg="The ice breaks!" err=&{0x2082280c0 map[animal:orca size:9009] 2015-03-26 01:27:38.441574009 -0400 EDT panic It's over 9000!} number=100 omg=true -exit status 1 +``` +To ensure this behaviour even if a TTY is attached, set your formatter as follows: + +```go + log.SetFormatter(&log.TextFormatter{ + DisableColors: true, + FullTimestamp: true, + }) ``` +#### Logging Method Name + +If you wish to add the calling method as a field, instruct the logger via: +```go +log.SetReportCaller(true) +``` +This adds the caller as 'method' like so: + +```json +{"animal":"penguin","level":"fatal","method":"github.com/sirupsen/arcticcreatures.migrate","msg":"a penguin swims by", +"time":"2014-03-10 19:57:38.562543129 -0400 EDT"} +``` + +```text +time="2015-03-26T01:27:38-04:00" level=fatal method=github.com/sirupsen/arcticcreatures.migrate msg="a penguin swims by" animal=penguin +``` +Note that this does add measurable overhead - the cost will depend on the version of Go, but is +between 20 and 40% in recent tests with 1.6 and 1.7. You can validate this in your +environment via benchmarks: +``` +go test -bench=.*CallerTracing +``` + + #### Case-sensitivity The organization's name was changed to lower-case--and this will not be changed @@ -218,7 +251,7 @@ Logrus comes with [built-in hooks](hooks/). Add those, or your custom hook, in ```go import ( log "github.com/sirupsen/logrus" - "gopkg.in/gemnasium/logrus-airbrake-hook.v2" // the package is named "aibrake" + "gopkg.in/gemnasium/logrus-airbrake-hook.v2" // the package is named "airbrake" logrus_syslog "github.com/sirupsen/logrus/hooks/syslog" "log/syslog" ) @@ -239,59 +272,15 @@ func init() { ``` Note: Syslog hook also support connecting to local syslog (Ex. "/dev/log" or "/var/run/syslog" or "/var/run/log"). For the detail, please check the [syslog hook README](hooks/syslog/README.md). -| Hook | Description | -| ----- | ----------- | -| [Airbrake "legacy"](https://github.com/gemnasium/logrus-airbrake-legacy-hook) | Send errors to an exception tracking service compatible with the Airbrake API V2. Uses [`airbrake-go`](https://github.com/tobi/airbrake-go) behind the scenes. | -| [Airbrake](https://github.com/gemnasium/logrus-airbrake-hook) | Send errors to the Airbrake API V3. Uses the official [`gobrake`](https://github.com/airbrake/gobrake) behind the scenes. | -| [Amazon Kinesis](https://github.com/evalphobia/logrus_kinesis) | Hook for logging to [Amazon Kinesis](https://aws.amazon.com/kinesis/) | -| [Amqp-Hook](https://github.com/vladoatanasov/logrus_amqp) | Hook for logging to Amqp broker (Like RabbitMQ) | -| [Bugsnag](https://github.com/Shopify/logrus-bugsnag/blob/master/bugsnag.go) | Send errors to the Bugsnag exception tracking service. | -| [DeferPanic](https://github.com/deferpanic/dp-logrus) | Hook for logging to DeferPanic | -| [Discordrus](https://github.com/kz/discordrus) | Hook for logging to [Discord](https://discordapp.com/) | -| [ElasticSearch](https://github.com/sohlich/elogrus) | Hook for logging to ElasticSearch| -| [Firehose](https://github.com/beaubrewer/logrus_firehose) | Hook for logging to [Amazon Firehose](https://aws.amazon.com/kinesis/firehose/) -| [Fluentd](https://github.com/evalphobia/logrus_fluent) | Hook for logging to fluentd | -| [Go-Slack](https://github.com/multiplay/go-slack) | Hook for logging to [Slack](https://slack.com) | -| [Graylog](https://github.com/gemnasium/logrus-graylog-hook) | Hook for logging to [Graylog](http://graylog2.org/) | -| [Hiprus](https://github.com/nubo/hiprus) | Send errors to a channel in hipchat. | -| [Honeybadger](https://github.com/agonzalezro/logrus_honeybadger) | Hook for sending exceptions to Honeybadger | -| [InfluxDB](https://github.com/Abramovic/logrus_influxdb) | Hook for logging to influxdb | -| [Influxus](http://github.com/vlad-doru/influxus) | Hook for concurrently logging to [InfluxDB](http://influxdata.com/) | -| [Journalhook](https://github.com/wercker/journalhook) | Hook for logging to `systemd-journald` | -| [KafkaLogrus](https://github.com/goibibo/KafkaLogrus) | Hook for logging to kafka | -| [LFShook](https://github.com/rifflock/lfshook) | Hook for logging to the local filesystem | -| [Logentries](https://github.com/jcftang/logentriesrus) | Hook for logging to [Logentries](https://logentries.com/) | -| [Logentrus](https://github.com/puddingfactory/logentrus) | Hook for logging to [Logentries](https://logentries.com/) | -| [Logmatic.io](https://github.com/logmatic/logmatic-go) | Hook for logging to [Logmatic.io](http://logmatic.io/) | -| [Logrusly](https://github.com/sebest/logrusly) | Send logs to [Loggly](https://www.loggly.com/) | -| [Logstash](https://github.com/bshuster-repo/logrus-logstash-hook) | Hook for logging to [Logstash](https://www.elastic.co/products/logstash) | -| [Mail](https://github.com/zbindenren/logrus_mail) | Hook for sending exceptions via mail | -| [Mongodb](https://github.com/weekface/mgorus) | Hook for logging to mongodb | -| [NATS-Hook](https://github.com/rybit/nats_logrus_hook) | Hook for logging to [NATS](https://nats.io) | -| [Octokit](https://github.com/dorajistyle/logrus-octokit-hook) | Hook for logging to github via octokit | -| [Papertrail](https://github.com/polds/logrus-papertrail-hook) | Send errors to the [Papertrail](https://papertrailapp.com) hosted logging service via UDP. | -| [PostgreSQL](https://github.com/gemnasium/logrus-postgresql-hook) | Send logs to [PostgreSQL](http://postgresql.org) | -| [Pushover](https://github.com/toorop/logrus_pushover) | Send error via [Pushover](https://pushover.net) | -| [Raygun](https://github.com/squirkle/logrus-raygun-hook) | Hook for logging to [Raygun.io](http://raygun.io/) | -| [Redis-Hook](https://github.com/rogierlommers/logrus-redis-hook) | Hook for logging to a ELK stack (through Redis) | -| [Rollrus](https://github.com/heroku/rollrus) | Hook for sending errors to rollbar | -| [Scribe](https://github.com/sagar8192/logrus-scribe-hook) | Hook for logging to [Scribe](https://github.com/facebookarchive/scribe)| -| [Sentry](https://github.com/evalphobia/logrus_sentry) | Send errors to the Sentry error logging and aggregation service. | -| [Slackrus](https://github.com/johntdyer/slackrus) | Hook for Slack chat. | -| [Stackdriver](https://github.com/knq/sdhook) | Hook for logging to [Google Stackdriver](https://cloud.google.com/logging/) | -| [Sumorus](https://github.com/doublefree/sumorus) | Hook for logging to [SumoLogic](https://www.sumologic.com/)| -| [Syslog](https://github.com/Sirupsen/logrus/blob/master/hooks/syslog/syslog.go) | Send errors to remote syslog server. Uses standard library `log/syslog` behind the scenes. | -| [Syslog TLS](https://github.com/shinji62/logrus-syslog-ng) | Send errors to remote syslog server with TLS support. | -| [TraceView](https://github.com/evalphobia/logrus_appneta) | Hook for logging to [AppNeta TraceView](https://www.appneta.com/products/traceview/) | -| [Typetalk](https://github.com/dragon3/logrus-typetalk-hook) | Hook for logging to [Typetalk](https://www.typetalk.in/) | -| [logz.io](https://github.com/ripcurld00d/logrus-logzio-hook) | Hook for logging to [logz.io](https://logz.io), a Log as a Service using Logstash | -| [SQS-Hook](https://github.com/tsarpaul/logrus_sqs) | Hook for logging to [Amazon Simple Queue Service (SQS)](https://aws.amazon.com/sqs/) | +A list of currently known of service hook can be found in this wiki [page](https://github.com/sirupsen/logrus/wiki/Hooks) + #### Level logging -Logrus has six logging levels: Debug, Info, Warning, Error, Fatal and Panic. +Logrus has seven logging levels: Trace, Debug, Info, Warning, Error, Fatal and Panic. ```go +log.Trace("Something very low level.") log.Debug("Useful debugging information.") log.Info("Something noteworthy happened!") log.Warn("You should probably take a look at this.") @@ -363,15 +352,20 @@ The built-in logging formatters are: field to `true`. To force no colored output even if there is a TTY set the `DisableColors` field to `true`. For Windows, see [github.com/mattn/go-colorable](https://github.com/mattn/go-colorable). + * When colors are enabled, levels are truncated to 4 characters by default. To disable + truncation set the `DisableLevelTruncation` field to `true`. * All options are listed in the [generated docs](https://godoc.org/github.com/sirupsen/logrus#TextFormatter). * `logrus.JSONFormatter`. Logs fields as JSON. * All options are listed in the [generated docs](https://godoc.org/github.com/sirupsen/logrus#JSONFormatter). Third party logging formatters: +* [`FluentdFormatter`](https://github.com/joonix/log). Formats entries that can be parsed by Kubernetes and Google Container Engine. +* [`GELF`](https://github.com/fabienm/go-logrus-formatters). Formats entries so they comply to Graylog's [GELF 1.1 specification](http://docs.graylog.org/en/2.4/pages/gelf.html). * [`logstash`](https://github.com/bshuster-repo/logrus-logstash-hook). Logs fields as [Logstash](http://logstash.net) Events. * [`prefixed`](https://github.com/x-cray/logrus-prefixed-formatter). Displays log entry source along with alternative layout. * [`zalgo`](https://github.com/aybabtme/logzalgo). Invoking the P͉̫o̳̼̊w̖͈̰͎e̬͔̭͂r͚̼̹̲ ̫͓͉̳͈ō̠͕͖̚f̝͍̠ ͕̲̞͖͑Z̖̫̤̫ͪa͉̬͈̗l͖͎g̳̥o̰̥̅!̣͔̲̻͊̄ ̙̘̦̹̦. +* [`nested-logrus-formatter`](https://github.com/antonfisher/nested-logrus-formatter). Converts logrus fields to a nested structure. You can define your formatter by implementing the `Formatter` interface, requiring a `Format` method. `Format` takes an `*Entry`. `entry.Data` is a @@ -449,13 +443,13 @@ Logrus has a built in facility for asserting the presence of log messages. This ```go import( "github.com/sirupsen/logrus" - "github.com/sirupsen/logrus/hooks/null" + "github.com/sirupsen/logrus/hooks/test" "github.com/stretchr/testify/assert" "testing" ) func TestSomething(t*testing.T){ - logger, hook := null.NewNullLogger() + logger, hook := test.NewNullLogger() logger.Error("Helloerror") assert.Equal(t, 1, len(hook.Entries)) @@ -485,7 +479,7 @@ logrus.RegisterExitHandler(handler) #### Thread safety -By default Logger is protected by mutex for concurrent writes, this mutex is invoked when calling hooks and writing logs. +By default, Logger is protected by a mutex for concurrent writes. The mutex is held when calling hooks and writing logs. If you are sure such locking is not needed, you can call logger.SetNoLock() to disable the locking. Situation when locking is not needed includes: |