After the Oracle Unified Directory instance is set up you can monitor it using Prometheus and Grafana.
Create a Kubernetes namespace to provide a scope for Prometheus and Grafana objects such as pods and services that you create in the environment. To create your namespace issue the following command:
$ kubectl create ns mypgns
namespace/mypgns created
Add the Prometheus and Grafana Helm repositories by issuing the following commands:
$ helm repo add prometheus https://prometheus-community.github.io/helm-charts
"prometheus" has been added to your repositories
$ helm repo update
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "prometheus" chart repository
...Successfully got an update from the "stable" chart repository
Update Complete. Happy Helming!
$
Install the Prometheus Operator using the helm command:
$ helm install <release_name> prometheus/kube-prometheus-stack grafana.adminPassword=<password> -n <namespace>
For example:
$ helm install mypg prometheus/kube-prometheus-stack grafana.adminPassword=<password> -n mypgns
Output should be similar to the following:
NAME: mypg
LAST DEPLOYED: Mon Oct 12 02:05:41 2020
NAMESPACE: mypgns
STATUS: deployed
REVISION: 1
NOTES:
kube-prometheus-stack has been installed. Check its status by running:
kubectl --namespace mypgns get pods -l "release=mypg"
Visit https://github.com/prometheus-operator/kube-prometheus for instructions on how to create & configure Alertmanager and Prometheus instances using the Operator.
View the objects created for Prometheus and Grafana by issuing the following command:
$ kubectl get all,service,pod -o wide -n <namespace>
For example:
$ kubectl get all,service,pod -o wide -n mypgns
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/alertmanager-mypg-kube-prometheus-stack-alertmanager-0 2/2 Running 0 25m 10.244.1.25 10.89.73.203 <none> <none>
pod/mypg-grafana-b7d4fbfb-jzccm 2/2 Running 0 25m 10.244.2.140 10.89.73.204 <none> <none>
pod/mypg-kube-prometheus-stack-operator-7fb485bbcd-lbh9d 2/2 Running 0 25m 10.244.2.139 10.89.73.204 <none> <none>
pod/mypg-kube-state-metrics-86dfdf9c75-nvbss 1/1 Running 0 25m 10.244.1.146 10.89.73.203 <none> <none>
pod/mypg-prometheus-node-exporter-29dzd 1/1 Running 0 25m 10.244.2.141 10.89.73.204 <none> <none>
pod/prometheus-mypg-kube-prometheus-stack-prometheus-0 3/3 Running 0 25m 10.244.2.140 10.89.73.203 <none> <none>
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/alertmanager-operated ClusterIP None <none> 9093/TCP,9094/TCP,9094/UDP 25m app=alertmanager
service/mypg-grafana ClusterIP 10.111.28.76 <none> 80/TCP 25m app.kubernetes.io/instance=mypg,app.kubernetes.io/name=grafana
service/mypg-kube-prometheus-stack-alertmanager ClusterIP 10.103.83.97 <none> 9093/TCP 25m alertmanager=mypg-kube-prometheus-stack-alertmanager,app=alertmanager
service/mypg-kube-prometheus-stack-operator ClusterIP 10.110.216.204 <none> 8080/TCP,443/TCP 25m app=kube-prometheus-stack-operator,release=mypg
service/mypg-kube-prometheus-stack-prometheus ClusterIP 10.104.11.9 <none> 9090/TCP 25m app=prometheus,prometheus=mypg-kube-prometheus-stack-prometheus
service/mypg-kube-state-metrics ClusterIP 10.109.172.125 <none> 8080/TCP 25m app.kubernetes.io/instance=mypg,app.kubernetes.io/name=kube-state-metrics
service/mypg-prometheus-node-exporter ClusterIP 10.110.249.92 <none> 9100/TCP 25m app=prometheus-node-exporter,release=mypg
service/prometheus-operated ClusterIP None <none> 9090/TCP 25m app=prometheus
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE CONTAINERS IMAGES SELECTOR
daemonset.apps/mypg-prometheus-node-exporter 3 3 0 3 0 <none> 25m node-exporter quay.io/prometheus/node-exporter:v1.0.1 app=prometheus-node-exporter,release=mypg
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.apps/mypg-grafana 1/1 1 1 25m grafana-sc-dashboard,grafana kiwigrid/k8s-sidecar:0.1.209,grafana/grafana:7.2.0 app.kubernetes.io/instance=mypg,app.kubernetes.io/name=grafana
deployment.apps/mypg-kube-prometheus-stack-operator 1/1 1 1 25m kube-prometheus-stack,tls-proxy quay.io/prometheus-operator/prometheus-operator:v0.42.1,squareup/ghostunnel:v1.5.2 app=kube-prometheus-stack-operator,release=mypg
deployment.apps/mypg-kube-state-metrics 1/1 1 1 25m kube-state-metrics quay.io/coreos/kube-state-metrics:v1.9.7 app.kubernetes.io/name=kube-state-metrics
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
replicaset.apps/mypg-grafana-b7d4fbfb 1 1 1 25m grafana-sc-dashboard,grafana kiwigrid/k8s-sidecar:0.1.209,grafana/grafana:7.2.0 app.kubernetes.io/instance=mypg,app.kubernetes.io/name=grafana,pod-template-hash=b7d4fbfb
replicaset.apps/mypg-kube-prometheus-stack-operator-7fb485bbcd 1 1 1 25m kube-prometheus-stack,tls-proxy quay.io/prometheus-operator/prometheus-operator:v0.42.1,squareup/ghostunnel:v1.5.2 app=kube-prometheus-stack-operator,pod-template-hash=7fb485bbcd,release=mypg
replicaset.apps/mypg-kube-state-metrics-86dfdf9c75 1 1 1 25m kube-state-metrics quay.io/coreos/kube-state-metrics:v1.9.7 app.kubernetes.io/name=kube-state-metrics,pod-template-hash=86dfdf9c75
NAME READY AGE CONTAINERS IMAGES
statefulset.apps/alertmanager-mypg-kube-prometheus-stack-alertmanager 1/1 25m alertmanager,config-reloader quay.io/prometheus/alertmanager:v0.21.0,jimmidyson/configmap-reload:v0.4.0
statefulset.apps/prometheus-mypg-kube-prometheus-stack-prometheus 0/1 25m prometheus,prometheus-config-reloader,rules-configmap-reloader quay.io/prometheus/prometheus:v2.21.0,quay.io/prometheus-operator/prometheus-config-reloader:v0.42.1,docker.io/jimmidyson/configmap-reload:v0.4.0
Edit the grafana service to add the NodePort in the service.nodeport=<nodeport> and type=NodePort and save:
$ kubectl edit service/prometheus-grafana -n <namespace>
ports:
- name: service
nodePort: 30091
port: 80
protocol: TCP
targetPort: 3000
selector:
app.kubernetes.io/instance: prometheus-operator
app.kubernetes.io/name: grafana
sessionAffinity: None
type: NodePort
Access the Grafana GUI using http://<HostIP>:<nodeport> with the default username=admin and password=grafana.adminPassword:
Check the Prometheus datasource from the DataSource pane:
Add the customized k8cluster view dashboard json to view the cluster monitoring dashboard, by importing the following json file.
Download the JSON file from monitoring a Kubernetes cluster using Prometheus from https://grafana.com/grafana/dashboards/10856. Import the downloaded json using the import option.
Verify your installation by viewing some of the customized dashboard views.