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