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Kafka 消费者抵消导出 golang -- sharma 或 confluence-kafka-go lib

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时间:2024-04-23 20:51:34 369浏览 收藏

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问题内容

我正在尝试找到一种对消费者组执行偏移重置操作的方法,例如在 kafka 命令中将是这样的:

kafka-consumer-groups.sh --bootstrap-server $kfk --dry-run --reset-offsets --topic $t --group $cg1 --to-current --export | tee topic-offset.csv
kafka-consumer-groups.sh --bootstrap-server $kfk --dry-run --reset-offsets --topic $t --group $cg2 --to-current

然后基于该导出文件导入新的偏移量?

kafka-consumer-groups.sh --bootstrap-server $kfk --execute --reset-offsets --topic $t --group $cg2 --from-file topic-offset.csv

从文件导出导入不是问题...只是似乎无法找到获取然后设置偏移量的方法..

有人使用 sharmaconfluence-kafka-go lib 来玩这个吗?

感谢您提前提供任何建议:)


正确答案


这是一些根据 ymal 配置进行偏移重置的简单操作

https://github.com/nXnUs25/kfk-offsets

用于 lag 监控消费者组列表和偏移重置的命令行工具。

我们有相同的偏移量……现在为了模拟这个过程,我们将生成消息到主题并继续在消费者组propertest-cg1a11之一上消费,我们将生成5条消息并在该消费者组上消费它们,这将为我们提供以下信息:我们消费了

^c共处理了33条消息 28 + 5

❯ ./kfkgo lag
using config file: ~/kfk-offsets/kfk-offset.yaml
group                                    topic                                    partition       current-offset  log-end-offset  lag
propertest-cg1a11                        propertest                               0               183             183             0
propertest-cg1a11                        propertest                               1               165             165             0
propertest-cg1a11                        propertest                               2               192             192             0
propertest-cg1a11                        propertest                               3               177             177             0
propertest-cg1a11                        propertest                               4               192             192             0
propertest-cg1a11                        propertest                               5               169             169             0
propertest-cg1a11                        propertest                               6               180             180             0
propertest-cg1a11                        propertest                               7               164             164             0
propertest-cg1a11                        propertest                               8               195             195             0
propertest-cg1a11                        propertest                               9               188             188             0
propertest-cg1a11                        propertest                               10              184             184             0
propertest-cg1a11                        propertest                               11              184             184             0
total lag:                                                                                                                        0

❯ ./kfkgo lag -g propertest-cg -t propertest
using config file: ~/kfk-offsets/kfk-offset.yaml
group                                    topic                                    partition       current-offset  log-end-offset  lag
propertest-cg                            propertest                               0               179             183             4
propertest-cg                            propertest                               1               162             165             3
propertest-cg                            propertest                               2               190             192             2
propertest-cg                            propertest                               3               174             177             3
propertest-cg                            propertest                               4               187             192             5
propertest-cg                            propertest                               5               167             169             2
propertest-cg                            propertest                               6               177             180             3
propertest-cg                            propertest                               7               160             164             4
propertest-cg                            propertest                               8               192             195             3
propertest-cg                            propertest                               9               185             188             3
propertest-cg                            propertest                               10              183             184             1
propertest-cg                            propertest                               11              184             184             0
total lag:                                                                                                                        33

现在我们将偏移量从propertest-cg再次移回到propertest-cg1a11,这将允许我们在该cg上处理相同的消息。

❯ ./kfkgo offset -m
using config file: ~/kfk-offsets/kfk-offset.yaml
moving

再次验证:

kafka 命令:kafka-consumer-groups.sh

propertest-cg1a11 propertest      0          179             183             4               -               -               -
propertest-cg1a11 propertest      1          162             165             3               -               -               -
propertest-cg1a11 propertest      2          190             192             2               -               -               -
propertest-cg1a11 propertest      3          174             177             3               -               -               -
propertest-cg1a11 propertest      4          187             192             5               -               -               -
propertest-cg1a11 propertest      5          167             169             2               -               -               -
propertest-cg1a11 propertest      6          177             180             3               -               -               -
propertest-cg1a11 propertest      7          160             164             4               -               -               -
propertest-cg1a11 propertest      8          192             195             3               -               -               -
propertest-cg1a11 propertest      9          185             188             3               -               -               -
propertest-cg1a11 propertest      10         183             184             1               -               -               -
propertest-cg1a11 propertest      11         184             184             0               -               -               -


consumer group 'propertest-cg' has no active members.
propertest-cg   propertest      0          179             183             4               -               -               -
propertest-cg   propertest      1          162             165             3               -               -               -
propertest-cg   propertest      2          190             192             2               -               -               -
propertest-cg   propertest      3          174             177             3               -               -               -
propertest-cg   propertest      4          187             192             5               -               -               -
propertest-cg   propertest      5          167             169             2               -               -               -
propertest-cg   propertest      6          177             180             3               -               -               -
propertest-cg   propertest      7          160             164             4               -               -               -
propertest-cg   propertest      8          192             195             3               -               -               -
propertest-cg   propertest      9          185             188             3               -               -               -
propertest-cg   propertest      10         183             184             1               -               -               -
propertest-cg   propertest      11         184             184             0               -               -               -

❯ ./kfkgo lag -g propertest-cg -t propertest
using config file: ~/kfk-offsets/kfk-offset.yaml
group                                    topic                                    partition       current-offset  log-end-offset  lag
propertest-cg                            propertest                               0               179             183             4
propertest-cg                            propertest                               1               162             165             3
propertest-cg                            propertest                               2               190             192             2
propertest-cg                            propertest                               3               174             177             3
propertest-cg                            propertest                               4               187             192             5
propertest-cg                            propertest                               5               167             169             2
propertest-cg                            propertest                               6               177             180             3
propertest-cg                            propertest                               7               160             164             4
propertest-cg                            propertest                               8               192             195             3
propertest-cg                            propertest                               9               185             188             3
propertest-cg                            propertest                               10              183             184             1
propertest-cg                            propertest                               11              184             184             0
total lag:                                                                                                                        33

❯ ./kfkgo lag
using config file: ~/kfk-offsets/kfk-offset.yaml
group                                    topic                                    partition       current-offset  log-end-offset  lag
propertest-cg1a11                        propertest                               0               179             183             4
propertest-cg1a11                        propertest                               1               162             165             3
propertest-cg1a11                        propertest                               2               190             192             2
propertest-cg1a11                        propertest                               3               174             177             3
propertest-cg1a11                        propertest                               4               187             192             5
propertest-cg1a11                        propertest                               5               167             169             2
propertest-cg1a11                        propertest                               6               177             180             3
propertest-cg1a11                        propertest                               7               160             164             4
propertest-cg1a11                        propertest                               8               192             195             3
propertest-cg1a11                        propertest                               9               185             188             3
propertest-cg1a11                        propertest                               10              183             184             1
propertest-cg1a11                        propertest                               11              184             184             0
total lag:                                                                                                                        33

自述文件中的更多示例

好吧,我想我发现它只需要实现完整的解决方案,但我应该擅长

func main() {
    brokers := []string{bk}
    kfk.logger = log.new(os.stdout, "", log.lstdflags)

    cfg := kfk.newconfig()
    cfg.clientid = cid
    client, _ := kfk.newclient(brokers, cfg)
    //fmt.println(client)
    offsetmg, _ := kfk.newoffsetmanagerfromclient(cg, client)
    defer offsetmg.close()

    consumer, _ := kfk.newconsumerfromclient(client)
    defer consumer.close()

    partitions, _ := consumer.partitions(topic)

    for _, p := range partitions {

        pom, _ := offsetmg.managepartition(topic, p)
        ofs, pomstr := pom.nextoffset()
        fmt.printf("partition: %v -> nextoffset: %v:%s\n", p, ofs, pomstr)

    }
    fmt.println("--")

}

这给了我这个输出:

partition: 0 -> nextoffset: 31:
partition: 1 -> nextoffset: 30:
partition: 2 -> nextoffset: 45:
partition: 3 -> nextoffset: 39:
partition: 4 -> nextoffset: 45:
partition: 5 -> nextoffset: 39:
partition: 6 -> nextoffset: 37:
partition: 7 -> nextoffset: 42:
partition: 8 -> nextoffset: 43:
partition: 9 -> nextoffset: 35:
partition: 10 -> nextoffset: 41:
partition: 11 -> nextoffset: 36:

与 java 命令完全相同:

❯ kafka-consumer-groups.sh --bootstrap-server $kfk --dry-run --reset-offsets --topic $t --group $cg1 --to-current | sort -k3 -n

group                          topic                          partition  new-offset
propertest-cg1                 propertest                     0          31
propertest-cg1                 propertest                     1          30
propertest-cg1                 propertest                     2          45
propertest-cg1                 propertest                     3          39
propertest-cg1                 propertest                     4          45
propertest-cg1                 propertest                     5          39
propertest-cg1                 propertest                     6          37
propertest-cg1                 propertest                     7          42
propertest-cg1                 propertest                     8          43
propertest-cg1                 propertest                     9          35
propertest-cg1                 propertest                     10         41
propertest-cg1                 propertest                     11         36

所以现在剩下的就是将这些数据导出到文件并使用函数

// ResetOffset resets to the provided offset, alongside a metadata string that
    // represents the state of the partition consumer at that point in time. Reset
    // acts as a counterpart to MarkOffset, the difference being that it allows to
    // reset an offset to an earlier or smaller value, where MarkOffset only
    // allows incrementing the offset. cf MarkOffset for more details.
    ResetOffset(topic string, partition int32, offset int64, metadata string)

设置新的偏移量...

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