在k8s集群中，利用prometheus的jmx_exporter进行tomcat的JVM性能监控，并用grafana作前端展示
查找了很多文档，没有完全达到我要求的，
于是，作了一定的调整，成现在这样。
操作步骤如下：
一，准备好两个文件。
jmx_prometheus_javaagent-0.3.1.jar
jmx_exporter.yml
jmx_exporter.yml作最简单配置如下：
--- rules: - pattern: ".*"
二，tomcat的启动项，一直在bin下单独的setenv.sh里操作，新增如下启动选项，将jar包及yaml加入启动选项。
JAVA_OPTS="$JAVA_OPTS -javaagent:/xxx/bin/jmx_prometheus_javaagent-0.3.1.jar=1234:/xxx/bin/jmx_exporter.yml"
三，制作dockerfile时，要将这两个东东也CP到上面指定目录，并EXPOSE一个新的端口。
...
COPY --chown=a:a tomcat /xxx/tomcat
COPY --chown=a:a jdk /xxx/jdk
COPY --chown=a:a jmx_prometheus_javaagent-0.3.1.jar /xxx/tomcat/bin/
COPY --chown=a:a jmx_exporter.yml /xxx/tomcat/bin/
WORKDIR ${CATALINA_HOME}
USER a
EXPOSE 8080 1234
四，更新prometheus的配置文件configmap，新增一个job。
- job_name: 'tomcat-pods'
tls_config:
ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
kubernetes_sd_configs:
- role: endpoints
relabel_configs:
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape, __meta_kubernetes_service_annotation_prometheus_io_jvm_scrape]
regex: true;true
action: keep
- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_app_metrics_patn]
action: replace
target_label: __metrics_path__
regex: (.+)
- source_labels: [__meta_kubernetes_pod_ip, __meta_kubernetes_service_annotation_prometheus_io_app_metrics_port]
action: replace
target_label: __address__
regex: (.+);(.+)
- source_labels: [__meta_kubernetes_namespace]
action: replace
target_label: kubernetes_namespace
- source_labels: [__meta_kubernetes_pod_name]
action: replace
target_label: kubernetes_pod_name
五，在对应的需要监控JVM的应用时，新增一个SERVICE。
apiVersion: v1
kind: Service
metadata:
labels:
name: xxx
name: xxx
namespace: default
annotations:
prometheus.io/scrape: "true"
prometheus.io/jvm-scrape: "true"
prometheus.io/jvm-port: "1234"
prometheus.io/jvm-path: "/metrics"
spec:
ports:
- port: 1234
targetPort: 1234
selector:
name: xxx
六，最后，导入grafana的插件文件。
{
"__inputs": [
{
"name": "DS_PROM",
"label": "prom",
"description": "A prometheus datasource with JMX Exporter scraping",
"type": "datasource",
"pluginId": "prometheus",
"pluginName": "Prometheus"
}
],
"__requires": [
{
"type": "grafana",
"id": "grafana",
"name": "Grafana",
"version": "4.5.0-pre1"
},
{
"type": "panel",
"id": "graph",
"name": "Graph",
"version": ""
},
{
"type": "datasource",
"id": "prometheus",
"name": "Prometheus",
"version": "1.0.0"
}
],
"annotations": {
"list": []
},
"description": " tomcat JVM Dashboard for JVM metrics with Prometheus / JMX Exporter",
"editable": true,
"gnetId": 3066,
"graphTooltip": 0,
"id": 10,
"iteration": 1544507474291,
"links": [],
"panels": [
{
"aliasColors": {},
"bars": false,
"dashLength": 10,
"dashes": false,
"datasource": "${DS_PROM}",
"fill": 1,
"gridPos": {
"h": 7,
"w": 24,
"x": 0,
"y": 0
},
"id": 2,
"legend": {
"alignAsTable": true,
"avg": true,
"current": true,
"max": true,
"min": true,
"rightSide": true,
"show": true,
"total": false,
"values": true
},
"lines": true,
"linewidth": 1,
"links": [],
"nullPointMode": "null",
"percentage": false,
"pointradius": 5,
"points": false,
"renderer": "flot",
"repeat": null,
"seriesOverrides": [],
"spaceLength": 10,
"stack": false,
"steppedLine": false,
"targets": [
{
"expr": "jvm_memory_bytes_used{kubernetes_pod_name=~\"$kubernetes_pod_name\"}",
"format": "time_series",
"interval": "",
"intervalFactor": 5,
"legendFormat": "{{area}} memory [{{instance}}]",
"metric": "jvm_memory_bytes_used",
"refId": "A",
"step": 5
}
],
"thresholds": [],
"timeFrom": null,
"timeShift": null,
"title": "Memory used",
"tooltip": {
"shared": true,
"sort": 0,
"value_type": "individual"
},
"type": "graph",
"xaxis": {
"buckets": null,
"mode": "time",
"name": null,
"show": true,
"values": []
},
"yaxes": [
{
"format": "bytes",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
},
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
}
],
"yaxis": {
"align": false,
"alignLevel": null
}
},
{
"aliasColors": {},
"bars": false,
"dashLength": 10,
"dashes": false,
"datasource": "${DS_PROM}",
"fill": 1,
"gridPos": {
"h": 7,
"w": 12,
"x": 0,
"y": 7
},
"id": 3,
"legend": {
"avg": false,
"current": false,
"max": false,
"min": false,
"show": true,
"total": false,
"values": false
},
"lines": true,
"linewidth": 1,
"links": [],
"nullPointMode": "null",
"percentage": false,
"pointradius": 5,
"points": false,
"renderer": "flot",
"seriesOverrides": [],
"spaceLength": 10,
"stack": false,
"steppedLine": false,
"targets": [
{
"expr": "jvm_threads_current{kubernetes_pod_name=~\"$kubernetes_pod_name\"}",
"format": "time_series",
"intervalFactor": 5,
"legendFormat": "current [{{instance}}]",
"metric": "jvm_threads_current",
"refId": "A",
"step": 10
},
{
"expr": "jvm_threads_daemon{kubernetes_pod_name=~\"$kubernetes_pod_name\"}",
"format": "time_series",
"intervalFactor": 5,
"legendFormat": "daemon [{{instance}}]",
"metric": "jvm_threads_daemon",
"refId": "B",
"step": 10
}
],
"thresholds": [],
"timeFrom": null,
"timeShift": null,
"title": "Threads used",
"tooltip": {
"shared": true,
"sort": 0,
"value_type": "individual"
},
"type": "graph",
"xaxis": {
"buckets": null,
"mode": "time",
"name": null,
"show": true,
"values": []
},
"yaxes": [
{
"decimals": 0,
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
},
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
}
],
"yaxis": {
"align": false,
"alignLevel": null
}
},
{
"aliasColors": {},
"bars": false,
"dashLength": 10,
"dashes": false,
"datasource": "${DS_PROM}",
"fill": 1,
"gridPos": {
"h": 7,
"w": 12,
"x": 12,
"y": 7
},
"id": 4,
"legend": {
"avg": false,
"current": false,
"max": false,
"min": false,
"show": true,
"total": false,
"values": false
},
"lines": true,
"linewidth": 1,
"links": [],
"nullPointMode": "null",
"percentage": false,
"pointradius": 5,
"points": false,
"renderer": "flot",
"seriesOverrides": [],
"spaceLength": 10,
"stack": false,
"steppedLine": false,
"targets": [
{
"expr": "jvm_classes_loaded{kubernetes_pod_name=~\"$kubernetes_pod_name\"}",
"format": "time_series",
"interval": "",
"intervalFactor": 5,
"legendFormat": "loaded [{{instance}}]",
"metric": "jvm_classes_loaded",
"refId": "A",
"step": 10
}
],
"thresholds": [],
"timeFrom": null,
"timeShift": null,
"title": "Class loading",
"tooltip": {
"shared": true,
"sort": 0,
"value_type": "individual"
},
"type": "graph",
"xaxis": {
"buckets": null,
"mode": "time",
"name": null,
"show": true,
"values": []
},
"yaxes": [
{
"decimals": 0,
"format": "short",
"label": "",
"logBase": 1,
"max": null,
"min": null,
"show": true
},
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
}
],
"yaxis": {
"align": false,
"alignLevel": null
}
},
{
"aliasColors": {},
"bars": false,
"dashLength": 10,
"dashes": false,
"datasource": "${DS_PROM}",
"fill": 1,
"gridPos": {
"h": 7,
"w": 12,
"x": 0,
"y": 14
},
"id": 5,
"legend": {
"avg": false,
"current": false,
"max": false,
"min": false,
"show": true,
"total": false,
"values": false
},
"lines": true,
"linewidth": 1,
"links": [],
"nullPointMode": "null",
"percentage": false,
"pointradius": 5,
"points": false,
"renderer": "flot",
"seriesOverrides": [],
"spaceLength": 10,
"stack": false,
"steppedLine": false,
"targets": [
{
"expr": "rate(jvm_gc_collection_seconds_sum{kubernetes_pod_name=~\"$kubernetes_pod_name\"}[1m])",
"format": "time_series",
"interval": "",
"intervalFactor": 5,
"legendFormat": "{{gc}} [{{instance}}]",
"metric": "jvm_gc_collection_seconds_sum",
"refId": "A",
"step": 10
}
],
"thresholds": [],
"timeFrom": null,
"timeShift": null,
"title": "GC time / 1 min. rate",
"tooltip": {
"shared": true,
"sort": 0,
"value_type": "individual"
},
"type": "graph",
"xaxis": {
"buckets": null,
"mode": "time",
"name": null,
"show": true,
"values": []
},
"yaxes": [
{
"format": "s",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
},
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
}
],
"yaxis": {
"align": false,
"alignLevel": null
}
},
{
"aliasColors": {},
"bars": false,
"dashLength": 10,
"dashes": false,
"datasource": "${DS_PROM}",
"fill": 1,
"gridPos": {
"h": 7,
"w": 12,
"x": 12,
"y": 14
},
"id": 6,
"legend": {
"avg": false,
"current": false,
"max": false,
"min": false,
"show": true,
"total": false,
"values": false
},
"lines": true,
"linewidth": 1,
"links": [],
"nullPointMode": "null",
"percentage": false,
"pointradius": 5,
"points": false,
"renderer": "flot",
"seriesOverrides": [],
"spaceLength": 10,
"stack": false,
"steppedLine": false,
"targets": [
{
"expr": "jvm_gc_collection_seconds_count{kubernetes_pod_name=~\"$kubernetes_pod_name\"}",
"format": "time_series",
"interval": "",
"intervalFactor": 5,
"legendFormat": "{{gc}} [{{instance}}]",
"metric": "",
"refId": "A",
"step": 10
}
],
"thresholds": [],
"timeFrom": null,
"timeShift": null,
"title": "GC count",
"tooltip": {
"shared": true,
"sort": 0,
"value_type": "individual"
},
"type": "graph",
"xaxis": {
"buckets": null,
"mode": "time",
"name": null,
"show": true,
"values": []
},
"yaxes": [
{
"decimals": 0,
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
},
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
}
],
"yaxis": {
"align": false,
"alignLevel": null
}
}
],
"refresh": "30s",
"schemaVersion": 16,
"style": "dark",
"tags": [
"JVM",
"prometheus",
"jmx_exporter"
],
"templating": {
"list": [
{
"allValue": "",
"current": {
"tags": [],
"text": "All",
"value": [
"$__all"
]
},
"datasource": "${DS_PROM}",
"hide": 0,
"includeAll": true,
"label": "kubernetes_pod_name",
"multi": true,
"name": "kubernetes_pod_name",
"options": [],
"query": "label_values(jvm_memory_bytes_max,kubernetes_pod_name)",
"refresh": 1,
"regex": "",
"skipUrlSync": false,
"sort": 0,
"tagValuesQuery": "",
"tags": [],
"tagsQuery": "",
"type": "query",
"useTags": false
}
]
},
"time": {
"from": "now-30m",
"to": "now"
},
"timepicker": {
"refresh_intervals": [
"5s",
"10s",
"30s",
"1m",
"5m",
"15m",
"30m",
"1h",
"2h",
"1d"
],
"time_options": [
"5m",
"15m",
"1h",
"6h",
"12h",
"24h",
"2d",
"7d",
"30d"
]
},
"timezone": "",
"title": " tomcat JVM overview - Prometheus",
"uid": "PVQFY0Pmz",
"version": 2
}
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