112 lines
7.6 KiB
Markdown
112 lines
7.6 KiB
Markdown
# Elasticsearch/Kibana Logging Demonstration
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This directory contains two pod specifications which can be used as synthetic
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loggig sources. The pod specification in [synthetic_0_25lps.yaml](synthetic_0_25lps.yaml)
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describes a pod that just emits a log message once every 4 seconds:
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```
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# This pod specification creates an instance of a synthetic logger. The logger
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# is simply a program that writes out the hostname of the pod, a count which increments
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# by one on each iteration (to help notice missing log enteries) and the date using
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# a long format (RFC-3339) to nano-second precision. This program logs at a frequency
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# of 0.25 lines per second. The shellscript program is given directly to bash as -c argument
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# and could have been written out as:
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# i="0"
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# while true
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# do
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# echo -n "`hostname`: $i: "
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# date --rfc-3339 ns
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# sleep 4
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# i=$[$i+1]
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# done
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apiVersion: v1beta1
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kind: Pod
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id: synthetic-logger-0.25lps-pod
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desiredState:
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manifest:
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version: v1beta1
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id: synth-logger-0.25lps
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containers:
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- name: synth-lgr
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image: ubuntu:14.04
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command: ["bash", "-c", "i=\"0\"; while true; do echo -n \"`hostname`: $i: \"; date --rfc-3339 ns; sleep 4; i=$[$i+1]; done"]
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labels:
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name: synth-logging-source
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```
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The other YAML file [synthetic_10lps.yaml](synthetic_10lps.yaml) specifies a similar synthetic logger that emits 10 log messages every second. To run both synthetic loggers:
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```
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$ make up
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../../../kubectl.sh create -f synthetic_0_25lps.yaml
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Running: ../../../cluster/../cluster/gce/../../_output/dockerized/bin/linux/amd64/kubectl create -f synthetic_0_25lps.yaml
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synthetic-logger-0.25lps-pod
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../../../kubectl.sh create -f synthetic_10lps.yaml
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Running: ../../../cluster/../cluster/gce/../../_output/dockerized/bin/linux/amd64/kubectl create -f synthetic_10lps.yaml
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synthetic-logger-10lps-pod
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```
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Visiting the Kibana dashboard should make it clear that logs are being collected from the two synthetic loggers:
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You can report the running pods, replication controllers and services with another Makefile rule:
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```
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$ make get
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../../../kubectl.sh get pods
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Running: ../../../../cluster/gce/../../_output/dockerized/bin/linux/amd64/kubectl get pods
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POD CONTAINER(S) IMAGE(S) HOST LABELS STATUS
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7e1c7ce6-9764-11e4-898c-42010af03582 kibana-logging kubernetes/kibana kubernetes-minion-3.c.kubernetes-elk.internal/130.211.129.169 name=kibana-logging Running
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synthetic-logger-0.25lps-pod synth-lgr ubuntu:14.04 kubernetes-minion-2.c.kubernetes-elk.internal/146.148.41.87 name=synth-logging-source Running
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synthetic-logger-10lps-pod synth-lgr ubuntu:14.04 kubernetes-minion-1.c.kubernetes-elk.internal/146.148.42.44 name=synth-logging-source Running
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influx-grafana influxdb kubernetes/heapster_influxdb kubernetes-minion-3.c.kubernetes-elk.internal/130.211.129.169 name=influxdb Running
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grafana kubernetes/heapster_grafana
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elasticsearch dockerfile/elasticsearch
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heapster heapster kubernetes/heapster kubernetes-minion-2.c.kubernetes-elk.internal/146.148.41.87 name=heapster Running
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67cfcb1f-9764-11e4-898c-42010af03582 etcd quay.io/coreos/etcd:latest kubernetes-minion-3.c.kubernetes-elk.internal/130.211.129.169 k8s-app=skydns Running
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kube2sky kubernetes/kube2sky:1.0
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skydns kubernetes/skydns:2014-12-23-001
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6ba20338-9764-11e4-898c-42010af03582 elasticsearch-logging dockerfile/elasticsearch kubernetes-minion-3.c.kubernetes-elk.internal/130.211.129.169 name=elasticsearch-logging Running
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../../../cluster/kubectl.sh get replicationControllers
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Running: ../../../cluster/../cluster/gce/../../_output/dockerized/bin/linux/amd64/kubectl get replicationControllers
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CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
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skydns etcd quay.io/coreos/etcd:latest k8s-app=skydns 1
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kube2sky kubernetes/kube2sky:1.0
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skydns kubernetes/skydns:2014-12-23-001
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elasticsearch-logging-controller elasticsearch-logging dockerfile/elasticsearch name=elasticsearch-logging 1
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kibana-logging-controller kibana-logging kubernetes/kibana name=kibana-logging 1
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../../.../kubectl.sh get services
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Running: ../../../cluster/../cluster/gce/../../_output/dockerized/bin/linux/amd64/kubectl get services
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NAME LABELS SELECTOR IP PORT
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kubernetes-ro component=apiserver,provider=kubernetes <none> 10.0.83.3 80
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kubernetes component=apiserver,provider=kubernetes <none> 10.0.79.4 443
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influx-master <none> name=influxdb 10.0.232.223 8085
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skydns k8s-app=skydns k8s-app=skydns 10.0.0.10 53
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elasticsearch-logging <none> name=elasticsearch-logging 10.0.25.103 9200
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kibana-logging <none> name=kibana-logging 10.0.208.114 5601
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```
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On the GCE provider you can also obtain the external IP addresses of the Elasticsearch and Kibana services:
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```
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$ make net
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IPAddress: 130.211.120.118
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IPProtocol: TCP
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creationTimestamp: '2015-01-08T10:30:34.210-08:00'
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id: '12815488049392139704'
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kind: compute#forwardingRule
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name: elasticsearch-logging
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portRange: 9200-9200
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region: https://www.googleapis.com/compute/v1/projects/kubernetes-elk/regions/us-central1
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selfLink: https://www.googleapis.com/compute/v1/projects/kubernetes-elk/regions/us-central1/forwardingRules/elasticsearch-logging
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target: https://www.googleapis.com/compute/v1/projects/kubernetes-elk/regions/us-central1/targetPools/elasticsearch-logging
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gcloud compute forwarding-rules describe kibana-logging
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IPAddress: 146.148.40.158
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IPProtocol: TCP
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creationTimestamp: '2015-01-08T10:31:05.715-08:00'
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id: '2755171906970792849'
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kind: compute#forwardingRule
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name: kibana-logging
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portRange: 5601-5601
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region: https://www.googleapis.com/compute/v1/projects/kubernetes-elk/regions/us-central1
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selfLink: https://www.googleapis.com/compute/v1/projects/kubernetes-elk/regions/us-central1/forwardingRules/kibana-logging
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target: https://www.googleapis.com/compute/v1/projects/kubernetes-elk/regions/us-central1/targetPools/kibana-logging
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```
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