After the Oracle Unified Directory Services Manager 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 namespace <namespace>
For example:
$ kubectl create namespace monitoring
The output will look similar to the following:
namespace/monitoring created
Add the Prometheus and Grafana Helm repositories by issuing the following command:
$ helm repo add prometheus https://prometheus-community.github.io/helm-charts
The output will look similar to the following:
"prometheus" has been added to your repositories
Run the following command to update the repositories:
$ helm repo update
The output will look similar to the following:
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "stable" chart repository
...Successfully got an update from the "prometheus" chart repository
...Successfully got an update from the "prometheus-community" chart repository
Update Complete. Happy Helming!
Install the Prometheus operator using the helm command:
$ helm install <release_name> prometheus/kube-prometheus-stack -n <namespace>
For example:
$ helm install monitoring prometheus/kube-prometheus-stack -n monitoring
The output should look similar to the following:
NAME: monitoring
LAST DEPLOYED: Thu Mar 24 16:29:23 2022
NAMESPACE: monitoring
STATUS: deployed
REVISION: 1
NOTES:
kube-prometheus-stack has been installed. Check its status by running:
kubectl --namespace monitoring get pods -l "release=monitoring"
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 monitoring
The output will look similar to the following:
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/alertmanager-monitoring-kube-prometheus-alertmanager-0 2/2 Running 0 27s 10.244.2.141 <worker-node> <none> <none>
pod/monitoring-grafana-578f79599c-qqdfb 2/3 Running 0 34s 10.244.1.127 <worker-node> <none> <none>
pod/monitoring-kube-prometheus-operator-65cdf7995-w6btr 1/1 Running 0 34s 10.244.1.126 <worker-node> <none> <none>
pod/monitoring-kube-state-metrics-56bfd4f44f-5ls8t 1/1 Running 0 34s 10.244.2.139 <worker-node> <none> <none>
pod/monitoring-prometheus-node-exporter-5b2f6 1/1 Running 0 34s 100.102.48.84 <worker-node> <none> <none>
pod/monitoring-prometheus-node-exporter-fw9xh 1/1 Running 0 34s 100.102.48.28 <worker-node> <none> <none>
pod/monitoring-prometheus-node-exporter-s5n9g 1/1 Running 0 34s 100.102.48.121 <master-node> <none> <none>
pod/prometheus-monitoring-kube-prometheus-prometheus-0 2/2 Running 0 26s 10.244.1.128 <worker-node> <none> <none>
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/alertmanager-operated ClusterIP None <none> 9093/TCP,9094/TCP,9094/UDP 27s app.kubernetes.io/name=alertmanager
service/monitoring-grafana ClusterIP 10.110.97.252 <none> 80/TCP 34s app.kubernetes.io/instance=monitoring,app.kubernetes.io/name=grafana
service/monitoring-kube-prometheus-alertmanager ClusterIP 10.110.82.176 <none> 9093/TCP 34s alertmanager=monitoring-kube-prometheus-alertmanager,app.kubernetes.io/name=alertmanager
service/monitoring-kube-prometheus-operator ClusterIP 10.104.147.173 <none> 443/TCP 34s app=kube-prometheus-stack-operator,release=monitoring
service/monitoring-kube-prometheus-prometheus ClusterIP 10.110.109.245 <none> 9090/TCP 34s app.kubernetes.io/name=prometheus,prometheus=monitoring-kube-prometheus-prometheus
service/monitoring-kube-state-metrics ClusterIP 10.107.111.214 <none> 8080/TCP 34s app.kubernetes.io/instance=monitoring,app.kubernetes.io/name=kube-state-metrics
service/monitoring-prometheus-node-exporter ClusterIP 10.108.97.196 <none> 9100/TCP 34s app=prometheus-node-exporter,release=monitoring
service/prometheus-operated ClusterIP None <none> 9090/TCP 26s app.kubernetes.io/name=prometheus
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE CONTAINERS IMAGES SELECTOR
daemonset.apps/monitoring-prometheus-node-exporter 3 3 3 3 3 <none> 34s node-exporter quay.io/prometheus/node-exporter:v1.3.1 app=prometheus-node-exporter,release=monitoring
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR
deployment.apps/monitoring-grafana 0/1 1 0 34s grafana-sc-dashboard,grafana-sc-datasources,grafana quay.io/kiwigrid/k8s-sidecar:1.15.6,quay.io/kiwigrid/k8s-sidecar:1.15.6,grafana/grafana:8.4.2 app.kubernetes.io/instance=monitoring,app.kubernetes.io/name=grafana
deployment.apps/monitoring-kube-prometheus-operator 1/1 1 1 34s kube-prometheus-stack quay.io/prometheus-operator/prometheus-operator:v0.55.0 app=kube-prometheus-stack-operator,release=monitoring
deployment.apps/monitoring-kube-state-metrics 1/1 1 1 34s kube-state-metrics k8s.gcr.io/kube-state-metrics/kube-state-metrics:v2.4.1 app.kubernetes.io/instance=monitoring,app.kubernetes.io/name=kube-state-metrics
NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR
replicaset.apps/monitoring-grafana-578f79599c 1 1 0 34s grafana-sc-dashboard,grafana-sc-datasources,grafana quay.io/kiwigrid/k8s-sidecar:1.15.6,quay.io/kiwigrid/k8s-sidecar:1.15.6,grafana/grafana:8.4.2 app.kubernetes.io/instance=monitoring,app.kubernetes.io/name=grafana,pod-template-hash=578f79599c
replicaset.apps/monitoring-kube-prometheus-operator-65cdf7995 1 1 1 34s kube-prometheus-stack quay.io/prometheus-operator/prometheus-operator:v0.55.0 app=kube-prometheus-stack-operator,pod-template-hash=65cdf7995,release=monitoring
replicaset.apps/monitoring-kube-state-metrics-56bfd4f44f 1 1 1 34s kube-state-metrics k8s.gcr.io/kube-state-metrics/kube-state-metrics:v2.4.1 app.kubernetes.io/instance=monitoring,app.kubernetes.io/name=kube-state-metrics,pod-template-hash=56bfd4f44f
NAME READY AGE CONTAINERS IMAGES
statefulset.apps/alertmanager-monitoring-kube-prometheus-alertmanager 1/1 27s alertmanager,config-reloader quay.io/prometheus/alertmanager:v0.23.0,quay.io/prometheus-operator/prometheus-config-reloader:v0.55.0
statefulset.apps/prometheus-monitoring-kube-prometheus-prometheus 1/1 26s prometheus,config-reloader quay.io/prometheus/prometheus:v2.33.5,quay.io/prometheus-operator/prometheus-config-reloader:v0.55.0
Edit the grafana service to add the NodePort:
$ kubectl edit service/<deployment_name>-grafana -n <namespace>
For example:
$ kubectl edit service/monitoring-grafana -n monitoring
Note: This opens an edit session for the domain where parameters can be changed using standard vi commands.
Change the ports entry and add nodePort: 30091 and type: NodePort:
ports:
- name: http-web
nodePort: 30091
port: 80
protocol: TCP
targetPort: 3000
selector:
app.kubernetes.io/instance: monitoring
app.kubernetes.io/name: grafana
sessionAffinity: None
type: NodePort
Save the file and exit (:wq).
Access the Grafana GUI using http://<HostIP>:<nodeport> and login with admin/prom-operator. Change the password when prompted.
Download the K8 Cluster Detail Dashboard json file from: https://grafana.com/grafana/dashboards/10856.
Import the Grafana dashboard by navigating on the left hand menu to Create > Import. Click Upload JSON file and select the json downloaded file. In the Prometheus drop down box select Prometheus. Click Import. The dashboard should be displayed.
Verify your installation by viewing some of the customized dashboard views.