CHALLENGES IN A MICROSERVICES AGE: MONITORING, LOGGING AND TRACING ON OPENSHIFT. Martin Etmajer Technology May 4, 2017
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1 CHALLENGES IN A MICROSERVICES AGE: MONITORING, LOGGING AND TRACING ON OPENSHIFT Martin Etmajer Technology May 4, 2017
2 WHY A CHALLENGE?
3 Microservice A Microservice B Microservice C
4 Microservice A Microservice B Microservice C Runtime Environment Runtime Environment Runtime Environment
5 Microservice A Data Store Microservice B Data Store Microservice C Data Store Runtime Environment Runtime Environment Runtime Environment
6 Microservice A Data Store Microservice B Data Store Microservice C Data Store Runtime Environment Runtime Environment Runtime Environment
7 Microservice A Data Microservice B Data Microservice C Store Store Data Store Runtime Environment Runtime Environment Runtime Environment
8 Load Balancing 3 6 Load Balancing Load Balancing Microservice A Data Store Microservice B Data Store Microservice C Data Store Runtime Environment Runtime Environment Runtime Environment
9 Load Balancing 3 6 Load Balancing Load Balancing Microservice A Data Store Microservice B Data Store Microservice C Data Store Runtime Environment Runtime Environment Runtime Environment
10 Load Balancing 3 6 Load Balancing Load Balancing Microservice A Data Store Microservice B Data Store Microservice C Data Store Runtime Environment Runtime Environment Runtime Environment Messaging System
11 API Gateways Load Balancing 3 6 Load Balancing Load Balancing Microservice A Data Store Microservice B Data Store Microservice C Data Store Runtime Environment Runtime Environment Runtime Environment Messaging System
12 security load balancing API Gateways discovery & routing languages Load Balancing storage 3 6 Load Balancing Load Balancing Microservice A Data Store Microservice B Data Store Microservice C Data Store Runtime Environment Runtime Environment Runtime Environment messaging application servers, container runtimes, Messaging System
13 RED HAT Hello World MSA Demo
14
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17 MONITORING
18 Monitoring container health checks with OpenShift Liveness Probes What? a liveness probe periodically checks if a container is able to handle requests when a condition has not been met within a given timeout, the probe fails if a probe fails, the container is killed and subjected to its restart policy
19 Monitoring container health checks with OpenShift Liveness Probes How? set in spec.containers.livenessprobe of Pod config 1 livenessprobe: 2 httpget: 3 path: /health 4 port: initialdelayseconds: 15 6 timeoutseconds: 1
20 Monitoring container health checks with OpenShift Liveness Probes How? supports HTTP Get, Container Command and TCP Socket types 1 livenessprobe: 2 httpget: 3 path: /health 4 port: initialdelayseconds: 15 6 timeoutseconds: 1
21 Monitoring container health checks with OpenShift Liveness Probes Demo How?
22 Monitoring Where are the fancy dashboards? Source: d3js.org - Data-Driven Documents
23 Monitoring container, pod and node metrics with Heapster and Hawkular Metrics Heapster Hawkular Metrics
24
25 collects resource usage data, etc.
26 exposes metrics via REST
27 supports various storage backends
28 Heapster runs in a Pod elasticsearch kafka gathers metrics exposes metrics influxdb graphite GCL GCM
29 e.g. Hawkular
30 Hawkular A collection of open source monitoring components by Red Hat
31 Hawkular A collection of open source monitoring components by Red Hat metrics storage engine
32 Hawkular A collection of open source monitoring components by Red Hat distributed tracing and application performance management
33 Hawkular A collection of open source monitoring components by Red Hat alerting
34 Hawkular A collection of open source monitoring components by Red Hat feed for Jolokia and Prometheus metrics
35 with a REST interface a metrics storage engine
36 Monitoring container, pod and node metrics with Heapster and Hawkular Metrics Demo visualizes metrics sends metrics gathers metrics!!!!!
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44 Monitoring application level metrics with Hawkular OpenShift Agent (HOSA) Hawkular OpenShift Agent Jolokia Prometheus
45 feeds Jolokia/Prometheus metrics data into Hawkular
46 Monitoring application level metrics with Hawkular OpenShift Agent (HOSA) is deployed via a DaemonSet!!!!!
47 Monitoring application level metrics with Hawkular OpenShift Agent (HOSA) runs!!!!! HOSA HOSA HOSA HOSA HOSA
48 Monitoring application level metrics with Hawkular OpenShift Agent (HOSA) applications sends metrics gathers metrics!!!!! HOSA HOSA HOSA HOSA HOSA
49 Monitoring application level metrics with Hawkular OpenShift Agent (HOSA) gathers metrics application containers!!!!! HOSA HOSA HOSA HOSA HOSA
50
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54 Monitoring application level metrics with Hawkular OpenShift Agent (HOSA) How? ConfigMap defines agent configuration 1 kind: ConfigMap 2 apiversion: v1 3 metadata: 4 name: my-hosa-config 5 data: 6 hawkular-openshift-agent: 7 endpoints: 8 - type: jolokia 15 - type: prometheus 9 protocol: http 16 protocol: http 10 port: port: path: /jolokia/ 18 path: /metrics/ 12 metrics 19 metrics: 13 - name: java.lang:type=memory 20 - name: process_start_time_seconds 14 type: gauge 21 type: gauge
55 Monitoring application level metrics with Hawkular OpenShift Agent (HOSA) Demo How? a volume named hawkular-openshift-agent tells HOSA to monitor this Pod 1 spec: 2 volumes: 3 - name: hawkular-openshift-agent 4 configmap: 5 name: my-hosa-config
56 Monitoring application level metrics with Hawkular OpenShift Agent (HOSA) How? 1 kind: ConfigMap 2 apiversion: v1 3 metadata: 4 name: my-hosa-config 5 data: Jolokia? 6 hawkular-openshift-agent: 7 endpoints: 8 - type: jolokia 15 - type: prometheus 9 protocol: http 16 protocol: http 10 port: port: path: /jolokia/ 18 path: /metrics/ 12 metrics 19 metrics: 13 - name: java.lang:type=memory 20 - name: process_start_time_seconds 14 type: gauge 21 type: gauge
57 Jolokia JMX on Capsaicin access JMX MBeans remotely via REST
58 Jolokia JMX on Capsaicin installs a Jolokia WAR agent into Apache Tomcat $ mv $JOLOKIA_HOME/agents/jolokia.war $TOMCAT_HOME/webapps $ $TOMCAT_HOME/bin/catalina.sh start
59 Monitoring application level metrics with Hawkular OpenShift Agent (HOSA) How? 1 kind: ConfigMap 2 apiversion: v1 3 metadata: 4 name: my-hosa-config 5 data: Prometheus? 6 hawkular-openshift-agent: 7 endpoints: 8 - type: jolokia 15 - type: prometheus 9 protocol: http 16 protocol: http 10 port: port: path: /jolokia/ 18 path: /metrics/ 12 metrics 19 metrics: 13 - name: java.lang:type=memory 20 - name: process_start_time_seconds 14 type: gauge 21 type: gauge
60 Prometheus A monitoring system for metrics data
61 Prometheus A monitoring system for metrics data metrics storage engine
62 Prometheus A monitoring system for metrics data various exporters expose metrics from nodes, database engines and cloud componentry
63 Prometheus A monitoring system for metrics data alerting
64 Prometheus A monitoring system for metrics data # build.gradle # Application.java 1 dependencies { 1 public void registermetricservlet() { 2 compile 'io.prometheus.simpleclient ' 2 // Expose Promtheus metrics. 3 compile 'io.prometheus.simpleclient_hotspot ' 3 context.addservlet(new ServletHolder (new MetricsServlet()), "/metrics"); 4 compile 'io.prometheus.simpleclient_servlet ' 4 // Add metrics about CPU, JVM memory etc. 5 } 5 DefaultExports.initialize(); 6 } exposes default JMX metrics: CPU, Memory, Garbage Collection, etc.
65 Where to start?
66 LOGGING
67 how to process all these data?
68 Logging application events with Elasticsearch, Fluentd and Kibana (EFK) Elasticsearch Fluentd Kibana
69 unifies your logging infrastructure; supports almost 200 plugins
70 Logging application events with Elasticsearch, Fluentd and Kibana (EFK) is deployed via a DaemonSet!!!!!
71 Logging application events with Elasticsearch, Fluentd and Kibana (EFK) deploys!!!!! Fluentd Fluentd Fluentd Fluentd Fluentd
72 Logging application events with Elasticsearch, Fluentd and Kibana (EFK) Demo query Kibana Elasticsearch Application ingests log data via configuration watches container logs!!!!! Fluentd Fluentd Fluentd Fluentd Fluentd
73
74
75 DISTRIBUTED TRACING
76
77 design goals
78 Google Dapper trace (transaction) initiator spans (timed operations) remote calls processes annotations, event data Source: Google Dapper Paper
79 ZipKin A distributed tracing system timescale spans
80 a standard API for reporting distributed traces with various client libraries
81 OpenTracing A vendor-neutral open standard for distributed tracing The problem? instrumentation is challenging: tracing context must propagate within and between processes unreasonable to ask all vendor and FOSS software to be intrumented by a single tracing vendor The solution? allow developers to instrument their own code using OpenTracing client libraries have the application maintainer choose the tracing technology via configuration change
82 Hawkular APM Distributed Tracing and Application Performance Management
83
84 Jaeger A distributed tracing system Source: Jaeger Architecture jaeger.readthedocs.io
85 SOLVED THE CHALLENGE?
86
87 Dynatrace All-in-one monitoring, now! dynatrace/oneagent!!!!!
88 Dynatrace All-in-one monitoring, now! deploys!!!!!
89
90
91 THANK YOU plus.google.com/+redhat facebook.com/redhatinc linkedin.com/company/red-hat twitter.com/redhatnews youtube.com/user/redhatvideos
92
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