prometheus setup

Author: mostafa6765

README.md

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+# setup prometheus (kube-prometheus-stack) on k8s
+
+easily setup prometheus(kube-prometheus-stack) on kubernetes and set prometheus, grafana and alertmanager config.
+
+# Manual process
+
+## add repo 
+
+```bash
+
+helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
+
+helm repo update
+```
+
+## create namespace 
+
+```bash
+kubectl create namespace monitoring
+```
+
+## add grafana secrets (alert credentials mail, slack ....)
+
+```bash
+kubectl apply -f grafana-secret.yml
+```
+
+### base64 generate 
+
+```bash
+echo -n 'the_data' | base64
+```
+
+## config 
+you can modify config data inside `config folder`
+
+## install prometheus
+
+```bash
+helm install prometheus prometheus-community/kube-prometheus-stack -n monitoring -f config/grafana.yml -f config/prometheus.yml -f config/alert-manager.yml
+```
+
+## upgrade
+
+```bash
+helm upgrade prometheus prometheus-community/kube-prometheus-stack -n monitoring -f config/grafana.yml -f config/prometheus.yml -f config/alert-manager.yml
+```
+
+## uninstall
+
+```bash
+helm uninstall prometheus -n monitoring
+```
+
+# automate with bash script
+
+```bash
+./setup-prometheus.sh
+```

config/alert-manager.yml

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+grafana:
+  smtp:
+    enabled: true
+    existingSecret: "grafana-smtp-secret"
+    passwordKey: "smtp_password"
+    userKey: "smtp_username"
+
+  grafana.ini:
+    smtp:
+      enabled: true
+      existingSecret: "grafana-smtp-secret"
+      passwordKey: "smtp_password"
+      userKey: "smtp_username"
+      host: sandbox.smtp.mailtrap.io:587
+      from_address: [email protected]
+
+
+
+
+

config/grafana.yml

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+apiVersion: v1
+kind: Secret
+metadata:
+  name: grafana-secret
+  namespace: monitoring # change to your namespace if different
+type: Opaque
+data:
+  smtp_username: "base64_username"
+  smtp_password: "base64_password"

config/prometheus.yml

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+#!/bin/bash
+
+# Define Prometheus Helm repository URL
+prometheus_repo="https://prometheus-community.github.io/helm-charts"
+
+# Function to check if namespace exists
+check_namespace() {
+    local namespace="$1"
+    if kubectl get namespace "$namespace" &> /dev/null; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+# Function to create namespace
+create_namespace() {
+    local namespace="$1"
+    echo "Creating namespace $namespace..."
+    kubectl create namespace "$namespace"
+}
+
+# Function to install Prometheus if not already installed
+install_prometheus() {
+    local namespace="monitoring"
+    if check_namespace "$namespace"; then
+        if helm list -n "$namespace" | grep -q "prometheus"; then
+            echo "Prometheus is already installed in namespace $namespace. You can upgrade."
+        else
+            echo "Installing Prometheus in namespace $namespace..."
+            helm install prometheus prometheus-community/kube-prometheus-stack -n "$namespace" -f config/grafana.yml -f config/prometheus.yml -f config/alert-manager.yml
+            echo "Prometheus installed successfully."
+        fi
+    else
+        create_namespace "$namespace"
+        echo "Namespace $namespace created."
+        kubectl apply -f grafana-secret.yml
+        echo "Secret for grafana configured."
+        install_prometheus
+    fi
+}
+
+# Function to upgrade Prometheus
+upgrade_prometheus() {
+    local namespace="monitoring"
+    kubectl apply -f grafana-secret.yml
+    echo "Secret for grafana configured."
+    echo "Upgrading Prometheus in namespace $namespace..."
+    helm upgrade prometheus prometheus-community/kube-prometheus-stack -n "$namespace" -f config/grafana.yml -f config/prometheus.yml -f config/alert-manager.yml
+    echo "Prometheus upgraded successfully."
+}
+
+# Function to uninstall Prometheus
+uninstall_prometheus() {
+    local namespace="monitoring"
+    echo "Are you sure you want to uninstall Prometheus from namespace $namespace? (yes/no)"
+    read confirm
+    case "$confirm" in
+        yes)
+            echo "Uninstalling Prometheus from namespace $namespace..."
+            helm uninstall prometheus -n "$namespace"
+            echo "Prometheus uninstalled successfully."
+            ;;
+        *)
+            echo "Uninstallation cancelled."
+            ;;
+    esac
+}
+
+# Prompt user for action
+echo "Do you want to install, upgrade, or uninstall Prometheus? (install/upgrade/uninstall)"
+read action
+
+# Perform action based on user input
+case "$action" in
+    install)
+        # Update Helm Repositories
+        echo "Updating Helm repositories..."
+        helm repo update
+        install_prometheus
+        ;;
+    upgrade)
+        upgrade_prometheus
+        ;;
+    uninstall)
+        uninstall_prometheus
+        ;;
+    *)
+        echo "Invalid action. Please choose 'install', 'upgrade', or 'uninstall'."
+        ;;
+esac