Some reasons why you might be interested:
- Consume messages on specific partitions between specific offsets.
- Display topic information (e.g., with partition offset and leader info)
- Modify consumer group offsets (e.g., resetting or manually setting offsets per topic and per partition)
- JSON output for easy consumption with tools like kp or jq.
- JSON input to facilitate automation via tools like jsonify.
- Configure brokers and topic via environment variables for a shell session
- Fast start up time.
- No buffering of output.
- Binary keys and payloads can be passed and presented in base64 or hex encoding
Read details about topics that match the regex output
$ kt topic -filter news -partitions
{
"name": "actor-news",
"partitions": [
{
"id": 0,
"oldest": 0,
"newest": 0
}
]
}
Produce messages:
$ echo 'Alice wins Oscar' | kt produce -topic actor-news -literal
{
"count": 1,
"partition": 0,
"startOffset": 0
}
$ for i in {6..9} ; do echo Bourne sequel $i in production. | kt produce -topic actor-news -literal ;done
{
"count": 1,
"partition": 0,
"startOffset": 1
}
{
"count": 1,
"partition": 0,
"startOffset": 2
}
{
"count": 1,
"partition": 0,
"startOffset": 3
}
{
"count": 1,
"partition": 0,
"startOffset": 4
}
Or pass in JSON object to control key, value and partition:
$ echo '{"value": "Terminator terminated", "key": "Arni", "partition": 0}' | kt produce -topic actor-news
{
"count": 1,
"partition": 0,
"startOffset": 5
}
Read messages at specific offsets on specific partitions:
$ kt consume -topic actor-news -offsets 0=1:2
{
"partition": 0,
"offset": 1,
"key": "",
"value": "Bourne sequel 6 in production.",
"timestamp": "1970-01-01T00:59:59.999+01:00"
}
{
"partition": 0,
"offset": 2,
"key": "",
"value": "Bourne sequel 7 in production.",
"timestamp": "1970-01-01T00:59:59.999+01:00"
}
Follow a topic, starting relative to newest offset:
$ kt consume -topic actor-news -offsets all=newest-1:
{
"partition": 0,
"offset": 4,
"key": "",
"value": "Bourne sequel 9 in production.",
"timestamp": "1970-01-01T00:59:59.999+01:00"
}
{
"partition": 0,
"offset": 5,
"key": "Arni",
"value": "Terminator terminated",
"timestamp": "1970-01-01T00:59:59.999+01:00"
}
^Creceived interrupt - shutting down
shutting down partition consumer for partition 0
View offsets for a given consumer group:
$ kt group -group enews -topic actor-news -partitions 0
found 1 groups
found 1 topics
{
"name": "enews",
"topic": "actor-news",
"offsets": {
"0": {
"offset": 6,
"lag": 0
}
}
}
Change consumer group offset:
$ kt group -group enews -topic actor-news -partitions 0 -reset 1
found 1 groups
found 1 topics
{
"name": "enews",
"topic": "actor-news",
"offsets": {
"0": {
"offset": 1,
"lag": 5
}
}
}
$ kt group -group enews -topic actor-news -partitions 0
found 1 groups
found 1 topics
{
"name": "enews",
"topic": "actor-news",
"offsets": {
"0": {
"offset": 1,
"lag": 5
}
}
}
You can download kt via the Releases section.
Alternatively, the usual way via the go tool, for example:
$ go get -u github.com/fgeller/kt
$ kt -help
kt is a tool for Kafka.
Usage:
kt command [arguments]
The commands are:
consume consume messages.
produce produce messages.
topic topic information.
group consumer group information and modification.
Use "kt [command] -help" for for information about the command.
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