Flink
Flink 采集器可以从 Flink 实例中采取很多指标,比如 Flink 服务器状态和网络的状态等多种指标,并将指标采集到观测云 ,帮助你监控分析 Flink 各种异常情况。
配置¶
前置条件¶
说明:示例 Flink 版本为 Flink 1.14.2 (CentOS),各个不同版本指标可能存在差异。
目前 Flink 官方提供两种 metrics 上报方式:Prometheus 和 Prometheus PushGateway。它们主要的区别是:
- Prometheus PushGateway 方式是把集群所有的 metrics 统一汇报给 PushGateway,所以需要额外安装 PushGateway。
- Prometheus 方式需要集群每个节点暴露一个唯一端口,不需要额外安装其它软件,但需要 N 个可用端口,配置略微复杂。
PrometheusPushGateway 方式(推荐)¶
- 下载和安装:PushGateWay 可以在 Prometheus 官方页面 进行下载。
启动 Push Gateway:(此命令仅供参考,具体命令根据实际环境可能有所不同)
- 配置
flink-conf.yaml
把 metrics 统一汇报给 PushGateway
配置 Flink 的配置文件 conf/flink-conf.yaml
示例:
metrics.reporter.promgateway.class: org.apache.flink.metrics.prometheus.PrometheusPushGatewayReporter # 固定这个值,不能改
metrics.reporter.promgateway.host: localhost # promgateway 的 IP 地址
metrics.reporter.promgateway.port: 9091 # promgateway 的监听端口
metrics.reporter.promgateway.interval: 15 SECONDS # 采集间隔
metrics.reporter.promgateway.groupingKey: k1=v1;k2=v2
# 以下是可选参数
# metrics.reporter.promgateway.jobName: myJob
# metrics.reporter.promgateway.randomJobNameSuffix: true
# metrics.reporter.promgateway.deleteOnShutdown: false
启动 Flink:./bin/start-cluster.sh
(此命令仅供参考,具体命令根据实际环境可能有所不同)
Prometheus 方式¶
- 配置
flink-conf.yaml
暴露各个节点的 metrics。配置 Flink 的配置文件conf/flink-conf.yaml
示例:
metrics.reporter.prom.class: org.apache.flink.metrics.prometheus.PrometheusReporter
metrics.reporter.prom.port: 9250-9260 # 各个节点的端口区间,根据节点数量有所不同,一个端口对应一个节点
- 启动 Flink:
./bin/start-cluster.sh
(此命令仅供参考,具体命令根据实际环境可能有所不同) - 可以访问外网的主机<安装 Datakit>
- 更改 Flink 配置添加如下内容,开启 Prometheus 采集
metrics.reporter.prom.class: org.apache.flink.metrics.prometheus.PrometheusReporter
metrics.reporter.prom.port: 9250-9260
注意:
metrics.reporter.prom.port
设置请参考集群jobmanager
和taskmanager
数量而定
- 重启 Flink 集群应用配置
curl http://{Flink iP}:9250-9260
返回结果正常即可开始采集
指标¶
默认情况下,Flink 会收集多个指标,这些指标可提供对当前状态的深入洞察。
flink_jobmanager
¶
- 标签
Tag | Description |
---|---|
host |
Host name. |
- 指标列表
Metric | Description | Type | Unit |
---|---|---|---|
Status_JVM_CPU_Load |
The recent CPU usage of the JVM. | int | count |
Status_JVM_CPU_Time |
The CPU time used by the JVM. | int | count |
Status_JVM_ClassLoader_ClassesLoaded |
The total number of classes loaded since the start of the JVM. | int | count |
Status_JVM_ClassLoader_ClassesUnloaded |
The total number of classes unloaded since the start of the JVM. | int | count |
Status_JVM_GarbageCollector_Copy_Count |
The total number of collections that have occurred. | int | count |
Status_JVM_GarbageCollector_Copy_Time |
The total time spent performing garbage collection. | int | count |
Status_JVM_GarbageCollector_G1_Old_Generation_Count |
The total number of collections that have occurred. | int | count |
Status_JVM_GarbageCollector_G1_Old_Generation_Time |
The total time spent performing garbage collection. | int | count |
Status_JVM_GarbageCollector_G1_Young_Generation_Count |
The total number of collections that have occurred. | int | count |
Status_JVM_GarbageCollector_G1_Young_Generation_Time |
The total time spent performing garbage collection. | int | count |
Status_JVM_GarbageCollector_MarkSweepCompact_Count |
The total number of collections that have occurred. | int | count |
Status_JVM_GarbageCollector_MarkSweepCompact_Time |
The total time spent performing garbage collection. | int | count |
Status_JVM_Memory_Direct_Count |
The number of buffers in the direct buffer pool. | int | count |
Status_JVM_Memory_Direct_MemoryUsed |
The amount of memory used by the JVM for the direct buffer pool. | int | count |
Status_JVM_Memory_Direct_TotalCapacity |
The total capacity of all buffers in the direct buffer pool. | int | count |
Status_JVM_Memory_Heap_Committed |
The amount of heap memory guaranteed to be available to the JVM. | int | count |
Status_JVM_Memory_Heap_Max |
The maximum amount of heap memory that can be used for memory management. | int | count |
Status_JVM_Memory_Heap_Used |
The amount of heap memory currently used. | int | count |
Status_JVM_Memory_Mapped_Count |
The number of buffers in the mapped buffer pool. | int | count |
Status_JVM_Memory_Mapped_MemoryUsed |
The amount of memory used by the JVM for the mapped buffer pool. | int | count |
Status_JVM_Memory_Mapped_TotalCapacity |
The number of buffers in the mapped buffer pool. | int | count |
Status_JVM_Memory_Metaspace_Committed |
The amount of memory guaranteed to be available to the JVM in the meta-space memory pool (in bytes). | int | count |
Status_JVM_Memory_Metaspace_Max |
The maximum amount of memory that can be used in the meta-space memory pool (in bytes). | int | count |
Status_JVM_Memory_Metaspace_Used |
Used bytes of a given JVM memory area | int | count |
Status_JVM_Memory_NonHeap_Committed |
The amount of non-heap memory guaranteed to be available to the JVM. | int | count |
Status_JVM_Memory_NonHeap_Max |
The maximum amount of non-heap memory that can be used for memory management | int | count |
Status_JVM_Memory_NonHeap_Used |
The amount of non-heap memory currently used. | int | count |
Status_JVM_Threads_Count |
The total number of live threads. | int | count |
numRegisteredTaskManagers |
The number of registered task managers. | int | count |
numRunningJobs |
The number of running jobs. | int | count |
taskSlotsAvailable |
The number of available task slots. | int | count |
taskSlotsTotal |
The total number of task slots. | int | count |
flink_taskmanager
¶
- 标签
Tag | Description |
---|---|
host |
Host name. |
tm_id |
Task manager ID. |
- 指标列表
Metric | Description | Type | Unit |
---|---|---|---|
Status_Flink_Memory_Managed_Total |
The total amount of managed memory. | int | count |
Status_Flink_Memory_Managed_Used |
The amount of managed memory currently used. | int | count |
Status_JVM_CPU_Load |
The recent CPU usage of the JVM. | int | count |
Status_JVM_CPU_Time |
The CPU time used by the JVM. | int | count |
Status_JVM_ClassLoader_ClassesLoaded |
The total number of classes loaded since the start of the JVM. | int | count |
Status_JVM_ClassLoader_ClassesUnloaded |
The total number of classes unloaded since the start of the JVM. | int | count |
Status_JVM_GarbageCollector_G1_Old_Generation_Count |
The total number of collections that have occurred. | int | count |
Status_JVM_GarbageCollector_G1_Old_Generation_Time |
The total time spent performing garbage collection. | int | count |
Status_JVM_GarbageCollector_G1_Young_Generation_Count |
The total number of collections that have occurred. | int | count |
Status_JVM_GarbageCollector_G1_Young_Generation_Time |
The total time spent performing garbage collection. | int | count |
Status_JVM_Memory_Direct_Count |
The number of buffers in the direct buffer pool. | int | count |
Status_JVM_Memory_Direct_MemoryUsed |
The amount of memory used by the JVM for the direct buffer pool. | int | count |
Status_JVM_Memory_Direct_TotalCapacity |
The total capacity of all buffers in the direct buffer pool. | int | count |
Status_JVM_Memory_Heap_Committed |
The amount of heap memory guaranteed to be available to the JVM. | int | count |
Status_JVM_Memory_Heap_Max |
The maximum amount of heap memory that can be used for memory management. | int | count |
Status_JVM_Memory_Heap_Used |
The amount of heap memory currently used. | int | count |
Status_JVM_Memory_Mapped_Count |
The number of buffers in the mapped buffer pool. | int | count |
Status_JVM_Memory_Mapped_MemoryUsed |
The amount of memory used by the JVM for the mapped buffer pool. | int | count |
Status_JVM_Memory_Mapped_TotalCapacity |
The number of buffers in the mapped buffer pool. | int | count |
Status_JVM_Memory_Metaspace_Committed |
The amount of memory guaranteed to be available to the JVM in the meta-space memory pool (in bytes). | int | count |
Status_JVM_Memory_Metaspace_Max |
The maximum amount of memory that can be used in the meta-space memory pool (in bytes). | int | count |
Status_JVM_Memory_Metaspace_Used |
Used bytes of a given JVM memory area | int | count |
Status_JVM_Memory_NonHeap_Committed |
The amount of non-heap memory guaranteed to be available to the JVM. | int | count |
Status_JVM_Memory_NonHeap_Max |
The maximum amount of non-heap memory that can be used for memory management | int | count |
Status_JVM_Memory_NonHeap_Used |
The amount of non-heap memory currently used. | int | count |
Status_JVM_Threads_Count |
The total number of live threads. | int | count |
Status_Network_AvailableMemorySegments |
The number of unused memory segments. | int | count |
Status_Network_TotalMemorySegments |
The number of allocated memory segments. | int | count |
Status_Shuffle_Netty_AvailableMemory |
The amount of unused memory in bytes. | int | count |
Status_Shuffle_Netty_AvailableMemorySegments |
The number of unused memory segments. | int | count |
Status_Shuffle_Netty_RequestedMemoryUsage |
Experimental: The usage of the network memory. Shows (as percentage) the total amount of requested memory from all of the subtasks. It can exceed 100% as not all requested memory is required for subtask to make progress. However if usage exceeds 100% throughput can suffer greatly and please consider increasing available network memory, or decreasing configured size of network buffer pools. | int | count |
Status_Shuffle_Netty_TotalMemory |
The amount of allocated memory in bytes. | int | count |
Status_Shuffle_Netty_TotalMemorySegments |
The number of allocated memory segments. | int | count |
Status_Shuffle_Netty_UsedMemory |
The amount of used memory in bytes. | int | count |
Status_Shuffle_Netty_UsedMemorySegments |
The number of used memory segments. | int | count |