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add labels/env log option for fluentd

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this allows fluentd logger to collect extra metadata from containers with
`--log-opt labels=label1,label2 --log-opt env=env1,env2`

Signed-off-by: Daniel Dao <dqminh@cloudflare.com>
This commit is contained in:
Daniel Dao 2015-10-04 21:05:43 +00:00 committed by Vincent Demeester
parent 5794a0190d
commit 4cc8490283
1 changed files with 9 additions and 3 deletions
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12
daemon/logger/fluentd/fluentd.go
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@ -20,6 +20,7 @@ type fluentd struct {
containerID string
containerName string
writer *fluent.Fluent
extra map[string]string
}
const (
@ -51,9 +52,8 @@ func New(ctx logger.Context) (logger.Logger, error) {
if err != nil {
return nil, err
}
logrus.Debugf("logging driver fluentd configured for container:%s, host:%s, port:%d, tag:%s.", ctx.ContainerID, host, port, tag)
extra := ctx.ExtraAttributes(nil)
logrus.Debugf("logging driver fluentd configured for container:%s, host:%s, port:%d, tag:%s, extra:%v.", ctx.ContainerID, host, port, tag, extra)
// logger tries to recoonect 2**32 - 1 times
// failed (and panic) after 204 years [ 1.5 ** (2**32 - 1) - 1 seconds]
log, err := fluent.New(fluent.Config{FluentPort: port, FluentHost: host, RetryWait: 1000, MaxRetry: math.MaxInt32})
@ -65,6 +65,7 @@ func New(ctx logger.Context) (logger.Logger, error) {
containerID: ctx.ContainerID,
containerName: ctx.ContainerName,
writer: log,
extra: extra,
}, nil
}
@ -75,6 +76,9 @@ func (f *fluentd) Log(msg *logger.Message) error {
"source": msg.Source,
"log": string(msg.Line),
}
for k, v := range f.extra {
data[k] = v
}
// fluent-logger-golang buffers logs from failures and disconnections,
// and these are transferred again automatically.
return f.writer.PostWithTime(f.tag, msg.Timestamp, data)
@ -95,6 +99,8 @@ func ValidateLogOpt(cfg map[string]string) error {
case "fluentd-address":
case "fluentd-tag":
case "tag":
case "labels":
case "env":
default:
return fmt.Errorf("unknown log opt '%s' for fluentd log driver", key)
}