218 lines
9.2 KiB
Markdown
218 lines
9.2 KiB
Markdown
# Elasticsearch/Kibana Logging Demonstration
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This directory contains two [pod](../../docs/pods.md) specifications which can be used as synthetic
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logging 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: v1
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kind: Pod
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metadata:
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labels:
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name: synth-logging-source
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name: synthetic-logger-0.25lps-pod
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spec:
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containers:
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- args:
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- bash
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- -c
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- 'i="0"; while true; do echo -n "`hostname`: $i: "; date --rfc-3339 ns; sleep
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4; i=$[$i+1]; done'
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image: ubuntu:14.04
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name: synth-lgr
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```
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The other YAML file [synthetic_10lps.yaml](synthetic_10lps.yaml) specifies a similar synthetic logger that emits 10 log messages every second. To run both synthetic loggers:
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```
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$ make up
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../../cluster/kubectl.sh create -f synthetic_0_25lps.yaml
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pods/synthetic-logger-0.25lps-pod
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../../cluster/kubectl.sh create -f synthetic_10lps.yaml
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pods/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](../../docs/replication-controller.md), and [services](../../docs/services.md) with another Makefile rule:
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```
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$ make get
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../../cluster/kubectl.sh get pods
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NAME READY REASON RESTARTS AGE
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elasticsearch-logging-v1-gzknt 1/1 Running 0 11m
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elasticsearch-logging-v1-swgzc 1/1 Running 0 11m
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fluentd-elasticsearch-kubernetes-minion-1rtv 1/1 Running 0 11m
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fluentd-elasticsearch-kubernetes-minion-6bob 1/1 Running 0 10m
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fluentd-elasticsearch-kubernetes-minion-98g3 1/1 Running 0 10m
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fluentd-elasticsearch-kubernetes-minion-qduc 1/1 Running 0 10m
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kibana-logging-v1-1w44h 1/1 Running 0 11m
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kube-dns-v3-i8u9s 3/3 Running 0 11m
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monitoring-heapster-v1-mles8 0/1 Running 11 11m
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synthetic-logger-0.25lps-pod 1/1 Running 0 42s
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synthetic-logger-10lps-pod 1/1 Running 0 41s
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../../cluster/kubectl.sh get replicationControllers
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CONTROLLER CONTAINER(S) IMAGE(S) SELECTOR REPLICAS
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elasticsearch-logging-v1 elasticsearch-logging gcr.io/google_containers/elasticsearch:1.4 k8s-app=elasticsearch-logging,version=v1 2
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kibana-logging-v1 kibana-logging gcr.io/google_containers/kibana:1.3 k8s-app=kibana-logging,version=v1 1
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kube-dns-v3 etcd gcr.io/google_containers/etcd:2.0.9 k8s-app=kube-dns,version=v3 1
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kube2sky gcr.io/google_containers/kube2sky:1.9
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skydns gcr.io/google_containers/skydns:2015-03-11-001
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monitoring-heapster-v1 heapster gcr.io/google_containers/heapster:v0.13.0 k8s-app=heapster,version=v1 1
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../../cluster/kubectl.sh get services
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NAME LABELS SELECTOR IP(S) PORT(S)
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elasticsearch-logging k8s-app=elasticsearch-logging,kubernetes.io/cluster-service=true,kubernetes.io/name=Elasticsearch k8s-app=elasticsearch-logging 10.0.145.125 9200/TCP
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kibana-logging k8s-app=kibana-logging,kubernetes.io/cluster-service=true,kubernetes.io/name=Kibana k8s-app=kibana-logging 10.0.189.192 5601/TCP
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kube-dns k8s-app=kube-dns,kubernetes.io/cluster-service=true,kubernetes.io/name=KubeDNS k8s-app=kube-dns 10.0.0.10 53/UDP
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53/TCP
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kubernetes component=apiserver,provider=kubernetes <none> 10.0.0.1 443/TCP
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```
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The `net` rule in the Makefile will report information about the Elasticsearch and Kibana services including the public IP addresses of each service.
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```
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$ make net
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../../cluster/kubectl.sh get services elasticsearch-logging -o json
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{
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"kind": "Service",
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"apiVersion": "v1",
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"metadata": {
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"name": "elasticsearch-logging",
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"namespace": "default",
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"selfLink": "/api/v1/namespaces/default/services/elasticsearch-logging",
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"uid": "e056e116-0fb4-11e5-9243-42010af0d13a",
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"resourceVersion": "23",
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"creationTimestamp": "2015-06-10T21:08:43Z",
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"labels": {
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"k8s-app": "elasticsearch-logging",
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"kubernetes.io/cluster-service": "true",
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"kubernetes.io/name": "Elasticsearch"
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}
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},
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"spec": {
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"ports": [
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{
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"protocol": "TCP",
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"port": 9200,
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"targetPort": "es-port",
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"nodePort": 0
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}
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],
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"selector": {
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"k8s-app": "elasticsearch-logging"
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},
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"clusterIP": "10.0.145.125",
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"type": "ClusterIP",
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"sessionAffinity": "None"
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},
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"status": {
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"loadBalancer": {}
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}
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}
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../../cluster/kubectl.sh get services kibana-logging -o json
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{
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"kind": "Service",
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"apiVersion": "v1",
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"metadata": {
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"name": "kibana-logging",
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"namespace": "default",
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"selfLink": "/api/v1/namespaces/default/services/kibana-logging",
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"uid": "e05c7dae-0fb4-11e5-9243-42010af0d13a",
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"resourceVersion": "30",
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"creationTimestamp": "2015-06-10T21:08:43Z",
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"labels": {
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"k8s-app": "kibana-logging",
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"kubernetes.io/cluster-service": "true",
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"kubernetes.io/name": "Kibana"
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}
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},
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"spec": {
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"ports": [
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{
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"protocol": "TCP",
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"port": 5601,
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"targetPort": "kibana-port",
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"nodePort": 0
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}
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],
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"selector": {
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"k8s-app": "kibana-logging"
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},
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"clusterIP": "10.0.189.192",
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"type": "ClusterIP",
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"sessionAffinity": "None"
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},
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"status": {
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"loadBalancer": {}
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}
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}
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```
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To find the URLs to access the Elasticsearch and Kibana viewer,
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```
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$ kubectl cluster-info
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Kubernetes master is running at https://104.154.60.226
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Elasticsearch is running at https://104.154.60.226/api/v1/proxy/namespaces/default/services/elasticsearch-logging
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Kibana is running at https://104.154.60.226/api/v1/proxy/namespaces/default/services/kibana-logging
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KubeDNS is running at https://104.154.60.226/api/v1/proxy/namespaces/default/services/kube-dns
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```
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To find the user name and password to access the URLs,
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```
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$ kubectl config view
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apiVersion: v1
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clusters:
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- cluster:
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certificate-authority-data: REDACTED
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server: https://104.154.60.226
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name: lithe-cocoa-92103_kubernetes
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contexts:
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- context:
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cluster: lithe-cocoa-92103_kubernetes
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user: lithe-cocoa-92103_kubernetes
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name: lithe-cocoa-92103_kubernetes
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current-context: lithe-cocoa-92103_kubernetes
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kind: Config
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preferences: {}
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users:
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- name: lithe-cocoa-92103_kubernetes
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user:
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client-certificate-data: REDACTED
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client-key-data: REDACTED
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token: 65rZW78y8HxmXXtSXuUw9DbP4FLjHi4b
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- name: lithe-cocoa-92103_kubernetes-basic-auth
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user:
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password: h5M0FtVXXflBSdI7
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username: admin
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```
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Access the Elasticsearch service at URL `https://104.154.60.226/api/v1/proxy/namespaces/default/services/elasticsearch-logging`, use the user name 'admin' and password 'h5M0FtVXXflBSdI7',
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```
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{
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"status" : 200,
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"name" : "Major Mapleleaf",
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"cluster_name" : "kubernetes_logging",
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"version" : {
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"number" : "1.4.4",
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"build_hash" : "c88f77ffc81301dfa9dfd81ca2232f09588bd512",
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"build_timestamp" : "2015-02-19T13:05:36Z",
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"build_snapshot" : false,
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"lucene_version" : "4.10.3"
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},
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"tagline" : "You Know, for Search"
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}
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```
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Visiting the URL `https://104.154.60.226/api/v1/proxy/namespaces/default/services/kibana-logging` should show the Kibana viewer for the logging information stored in the Elasticsearch service.
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[]()
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