- Kubernetes cluster
- helm
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Create a dedicated namespace for prometheus
kubectl create namespace monitoring
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Add Prometheus helm chart repository
helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
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Update the helm chart repository
helm repo update helm repo list
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Install the prometheus
helm install prometheus prometheus-community/kube-prometheus-stack --namespace monitoring
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Above helm create all services as ClusterIP. To access Prometheus out side of the cluster, we should change the service type load balancer
kubectl edit svc prometheus-kube-prometheus-prometheus -n monitoring
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Loginto Prometheus dashboard to monitor application https://:9090
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Check for node_load15 executor to check cluster monitoring
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We check similar graphs in the Grafana dashboard itself. for that, we should change the service type of Grafana to LoadBalancer
kubectl edit svc prometheus-grafana
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To login to Grafana account, use the below username and password
username: admin password: prom-operator
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Here we should check for "Node Exporter/USE method/Node" and "Node Exporter/USE method/Cluter" USE - Utilization, Saturation, Errors
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Even we can check the behavior of each pod, node, and cluster
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Create an slack account
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Create a slack channel called "demo-alerts"
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Install app called "incomming webooks". once installed it give a URL. Use the URL
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Copy below test along with URL
curl -X POST --data-urlencode "payload={\"channel\": \"#demo-alerts\", \"username\": \"webhookbot\", \"text\": \"This is posted to #demo-alerts and comes from a bot named webhookbot.\", \"icon_emoji\": \":ghost:\"}" <Webhook_URL> Example: curl -X POST --data-urlencode "payload={\"channel\": \"#demo-alerts\", \"username\": \"webhookbot\", \"text\": \"This is posted to #demo-alerts and comes from a bot named webhookbot.\", \"icon_emoji\": \":ghost:\"}" https://hooks.slack.com/services/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
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Now find out secret called "alertmanager-monitoring-kube-prometheus-alertmanager" and delete it
kubectl get secret -n monitoring kubectl delete secret -n monitoring alertmanager-my-kube-prometheus-stack-alertmanager
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Now create a configuration file with name 'alertmanager.yaml' and copy content from here
Note: make usre you have updated slack_web_url with the whebook url of slack -
Create a secret with an updated alertmanager.yaml file
kubectl create secret generic --from-file=alertmanager.yaml alertmanager-my-kube-prometheus-stack-alertmanager -n monitoring
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Look for the password of grafana
get secret --namespace default kubectl get secret --namespace default prometheus-grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo
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