go get github.com/fluent/fluent-logger-golang/fluent
Install the package with go get and use import to include it in your project.
import "github.com/fluent/fluent-logger-golang/fluent"
package main
import (
"github.com/fluent/fluent-logger-golang/fluent"
"fmt"
//"time"
)
func main() {
logger, err := fluent.New(fluent.Config{})
if err != nil {
fmt.Println(err)
}
defer logger.Close()
tag := "myapp.access"
var data = map[string]string{
"foo": "bar",
"hoge": "hoge",
}
error := logger.Post(tag, data)
// error := logger.PostWithTime(tag, time.Now(), data)
if error != nil {
panic(error)
}
}data must be a value like map[string]literal, map[string]interface{}, struct or msgp.Marshaler. Logger refers tags msg or codec of each fields of structs.
f := fluent.New(fluent.Config{FluentPort: 80, FluentHost: "example.com"})Specify the network protocol. The supported values are:
- "tcp" (use
FluentHostandFluentPort) - "tls" (use
FluentHostandFluentPort) - "unix" (use
FluentSocketPath)
The default is "tcp".
Specify a hostname or IP address as a string for the destination of the "tcp" protocol. The default is "127.0.0.1".
Specify the TCP port of the destination. The default is 24224.
Specify the unix socket path when FluentNetwork is "unix".
Set the timeout value of time.Duration to connect to the destination.
The default is 3 seconds.
Sets the timeout value of time.Duration for Write call of logger.Post.
Since the default is zero value, Write will not time out.
Sets the number of events buffered on the memory. Records will be stored in memory up to this number. If the buffer is full, the call to record logs will fail. The default is 8192.
Set the duration of the initial wait for the first retry, in milliseconds. The actual retry wait will be r * 1.5^(N-1) (r: this value, N: the number of retries).
The default is 500.
Sets the maximum number of retries. If the number of retries become larger than this value, the write/send operation will fail. The default is 13.
The maximum duration of wait between retries, in milliseconds. If the calculated retry wait is larger than this value, the actual retry wait will be this value. The default is 60,000 (60 seconds).
Sets the prefix string of the tag. Prefix will be appended with a dot ., like ppp.tag (ppp: the value of this parameter, tag: the tag string specified in a call).
The default is blank.
Enable asynchronous I/O (connect and write) for sending events to Fluentd. The default is false.
When Async is enabled, immediately discard the event queue on close() and return (instead of trying MaxRetry times for each event in the queue before returning) The default is false.
When Async is enabled, if this is callback is provided, it will be called on every write to Fluentd. The callback function
takes two arguments - a []byte of the message that was to be sent and an error. If the error is not nil this means the
delivery of the message was unsuccessful.
When async is enabled, this option defines the interval (ms) at which the connection to the fluentd-address is re-established. This option is useful if the address may resolve to one or more IP addresses, e.g. a Consul service address.
Enable time encoding as EventTime, which contains sub-second precision values. The messages encoded with this option can be received only by Fluentd v0.14 or later. The default is false.
Enable Json data marshaling to send messages using Json format (instead of the standard MessagePack). It is supported by Fluentd in_forward plugin.
The default is false.
Sets whether to request acknowledgment from Fluentd to increase the reliability of the connection. The default is false.
Skip verifying the server certificate. Useful for development and testing. The default is false.
"the features" includes heartbeat messages (for TCP keepalive), TLS transport and shared key authentication.
This logger doesn't support those features. Patches are welcome!
Before v1.8.0, the Fluent logger silently reopened connections whenever
Fluent.Post() was called.
logger, _ := fluent.New(fluent.Config{})
logger.Post(tag, data)
logger.Close()
logger.Post(tag, data) /* reopen connection */However, this behavior was confusing, in particular when multiple goroutines
were involved. Starting v1.8.0, the logger no longer accepts Fluent.Post()
after Fluent.Close(), and instead returns a "Logger already closed" error.
go test
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