in_udpInput plugin enables Fluentd to accept UDP payload.
in_udpis included in Fluentd's core. No additional installation process is required.
tag mytag # required
format /^(?<field1>\d+):(?<field2>\w+)$/ # required
port 20001 # optional. 5160 by default
bind 0.0.0.0 # optional. 0.0.0.0 by default
body_size_limit 1MB # optional. 4096 bytes by default
We've observed the drastic performance improvements on Linux, with proper kernel parameter settings (e.g. `net.core.rmem_max` parameter). If you have high-volume UDP traffic, please make sure to follow the instruction described at Before Installing Fluentd.
The value must be
tag of output events.
The port to listen to. Default Value = 5160
The bind address to listen to. Default Value = 0.0.0.0
The field name of the client's hostname. If set the value, the client's hostname will be set to its key. The default is nil (no adding hostname).
If you set following configuration:
then the client's hostname is set to
The format of the UDP payload.
in_udpuses parser plugin to parse the payload. See parser article for more detail.
log_leveloption allows the user to set different levels of logging for each plugin. The supported log levels are:
If in_udp gots lots of packets within 1 sec, some packets are dropped. For example, you can see bigger RcvbufErrors number via
This means in_udp with one process can't handle such traffic. Try fluent-plugin-multiprocess to resolve the problem. See issue 1334 for more detail.
If this article is incorrect or outdated, or omits critical information, please let us know. Fluentd is a open source project under Cloud Native Computing Foundation (CNCF). All components are available under the Apache 2 License.