Stackdriver-agent 未收集监控数据（KeyCache 的命中率）

Question

我正在 GCE VM 中配置 Stackdriver-agent 以监控 Cassandra 指标。（基于 GCP 指南：https://cloud.google.com/monitoring/agent/plugins/cassandra）

我使用了上面link的默认设置，它们工作正常。但是，我添加的一项指标无法使用并出现以下错误。

我尝试了类型和值的仪表或计数器或属性的计数。然而，它们中的任何一个都不能很好地工作。

有什么建议，请。

错误

Feb 19 23:14:08 pgxxxxxxx1 collectd[16917]: write_gcm: Server response (CollectdTimeseriesRequest) contains errors: { "payloadErrors": [ { "index": 161, "valueErrors": [ { "error": { "code": 3, "message": "Unsupported collectd id: plugin: \"cassandra\" type: \"gauge\" type_instance: \"cache_key_cache-hitrate\"" } } ] } ] }

配置（在指南中的原始配置中添加了 KeyCache-Hitrate 指标）

连接部分：

<Connection>
# When using non-standard Cassandra configurations, replace the below with
#ServiceURL "service:jmx:rmi:///jndi/rmi://CASSANDRA_HOST:CASSANDRA_PORT/jmxrmi"
ServiceURL "service:jmx:rmi:///jndi/rmi://localhost:7199/jmxrmi"
InstancePrefix "cassandra"
User "cassandra"
Password "xxxxxxxx"
Collect "cassandra_storageservice-load"
Collect "cassandra_Cache_KeyCache-Hits"
Collect "cassandra_Cache_KeyCache-HitRate"   <===== Added line
...
Collect "cassandra_DroppedMessage_MUTATION-Dropped"
Collect "cassandra_DroppedMessage_READ-Dropped"

MBean 部分：

<MBean "cassandra_Cache_KeyCache-HitRate">
    ObjectName "org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=HitRate"
    <Value>
        Type "gauge"
        InstancePrefix "cache_key_cache-hitrate"
        Table false
        Attribute "Value"
    </Value>
</MBean>

我的环境 stackdriver-agent 5.5.2-379.sdl.stretch 卡桑德拉 3.11.1

Answer 1

按照自定义指标指南和，我可以解决我的问题。

创建自定义指标按照此处的指南操作：https://cloud.google.com/monitoring/custom-metrics/creating-metrics#monitoring-create-metric-python （从自定义指标名称到调用创建方法。不需要时间序列）

还需要授权访问监控。（遵循 IAM 指南）。

配置cassandra插件（.conf文件）指南在这里：https://cloud.google.com/monitoring/agent/custom-metrics-agent （从顶部开始直到加载新配置）

我的示例代码

创建自定义指标的代码 client_request_read-latency-1minrate.py

从google.cloud导入监控

客户=monitoring.Client() 描述符 = client.metric_descriptor( 'custom.googleapis.com/cassandra/client_request/latency/1minrate', metric_kind=monitoring.MetricKind.GAUGE, value_type=monitoring.ValueType.DOUBLE, 标签=[monitoring.label.LabelDescriptor("operation", 描述="The storage operation name.")], 描述='Cassandra read latency rate for 1 minitue', display_name='Read latency 1 minutes rate') descriptor.create()

cassandra 插件示例（在同一配置文件中遵循 2-1 和 2-2） 2-1. cassandra 插件示例第 1 部分在

 <MBean "cassandra_custom_ClientRequest_Read-Latency">
     ObjectName "org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=Latency"
     <Value>
         Type "gauge"
         InstancePrefix "client_request_read-latency-1minrate"
         Table false
         Attribute "OneMinuteRate"
     </Value>
 </MBean>

<Connection>
    # When using non-standard Cassandra configurations, replace the below with
    #ServiceURL "service:jmx:rmi:///jndi/rmi://CASSANDRA_HOST:CASSANDRA_PORT/jmxrmi"
    ServiceURL "service:jmx:rmi:///jndi/rmi://localhost:7199/jmxrmi"
    InstancePrefix "cassandra_custom"
    User "cassandra user name"
    Password "your password"

    Collect "cassandra_custom_ClientRequest_Read-Latency"
</Connection>

2-2。 cassandra 插件示例第 2 部分

<Chain "GenericJMX_cassandra_custom">
    <Rule "rewrite_genericjmx_to_cassandra_custom">
        <Match regex>
            Plugin "^GenericJMX$"
            PluginInstance "^cassandra_custom.*$"
        </Match>
        <Target "set">
            MetaData "stackdriver_metric_type" "custom.googleapis.com/cassandra/client_request/latency/1minrate"
            MetaData "label:operation" "%{plugin_instance}"
        </Target>
        <Target "replace">
            MetaData "label:operation" "cassandra_custom_" ""
        </Target>
    </Rule>
    <Rule "go_back">
        Target "return"
    </Rule>
</Chain>

<Chain "PreCache">
    <Rule "jump_to_GenericJMX_cassandra_custom">
        <Target "jump">
            Chain "GenericJMX_cassandra_custom"
        </Target>
    </Rule>
</Chain>
PreCacheChain "PreCache"

Stackdriver监控手册的官方指南不太好读和理解。我希望这会有所帮助..

Stackdriver-agent 未收集监控数据（KeyCache 的命中率）

Stackdriver-agent didn't collect monitoring data (HitRate for KeyCache)

cassandra

collectd

google-cloud-stackdriver