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Added Dockerfile #1

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5 changes: 5 additions & 0 deletions Dockerfile
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
FROM scratch
ADD kafka-offset-exporter /
EXPOSE 9000
ENTRYPOINT ["/kafka-offset-exporter"]
CMD ["-brokers", "127.0.0.1:9092", "-topics", "^[^_].*", "-groups", "."]
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@davecaplinger davecaplinger Apr 14, 2018

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Should change -groups argument to '.*' otherwise no consumer-groups will match the pattern and therefore their stats will not be published but topic oldest/youngest offsets will still work, so you may not immediately notice.

27 changes: 27 additions & 0 deletions README.md
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Expand Up @@ -35,3 +35,30 @@ Usage of ./kafka-offset-exporter:
-topics string
Only fetch offsets for topics matching this regex (default all)
```

## Dockerfile

First build the binary to include in the Docker container. Default this generates a 10M binary. With (optional) `-ldflags="-s -w"` it becomes 6.5M.
```
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" .
```

Optional optimization: final result 1.7M binary.
```
upx --ultra-brute kafka-offset-exporter
```

Now build the docker image:
```
docker build -t kafka-offset-exporter .
```

Run the image:
```
docker run -d -p 9000:9000 kafka-offset-exporter
```

Additionally add arguments, e.g.:
```
docker run -d -p 9000:9000 kafka-offset-exporter -brokers 127.0.0.1:9092
```