feat(alertmanager): Add alerting system from Prometheus rules

manifests/prometheus/alertmanager/alertmanager.yaml

@@ -0,0 +1,13 @@
+apiVersion: monitoring.coreos.com/v1
+kind: Alertmanager
+metadata:
+  name: core
+  namespace: monitoring
+spec:
+  replicas: 1
+  alertmanagerConfigSelector:
+    matchLabels:
+      alertmanagerConfig: core
+  alertmanagerConfigMatcherStrategy:
+    type: None
+  logLevel: debug

manifests/prometheus/alertmanager/config.yaml

@@ -0,0 +1,22 @@
+apiVersion: monitoring.coreos.com/v1alpha1
+kind: AlertmanagerConfig
+metadata:
+  name: alertmanager-core-config
+  namespace: monitoring
+  labels:
+    alertmanagerConfig: core
+spec:
+  route:
+    groupBy: ['alertname']
+    groupWait: 30s
+    groupInterval: 5m
+    repeatInterval: 1h
+    receiver: discord
+    continue: true
+  receivers:
+  - name: discord
+    discordConfigs:
+      - apiURL: 
+          name: discord-webhook
+          key: url
+        sendResolved: true

manifests/prometheus/alertmanager/kustomization.yaml

@@ -0,0 +1,7 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - alertmanager.yaml
+  - config.yaml
+  - service.yaml

manifests/prometheus/alertmanager/service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: alertmanager-svc
+  namespace: monitoring
+spec:
+  ports:
+    - name: web
+      port: 9093
+      protocol: TCP
+      targetPort: web
+  selector:
+    alertmanager: discord

manifests/prometheus/kustomization.yaml

@@ -1,3 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
 resources:
   - serviceaccount.yaml
   - clusterrole.yaml
@@ -6,3 +9,4 @@ resources:
   - ingress.yaml
   - servicemonitor.yaml
   - prometheus.yaml
+  - alertmanager

manifests/prometheus/prometheus.yaml

@@ -7,9 +7,7 @@ spec:
   serviceAccountName: prometheus
   serviceMonitorNamespaceSelector: {}
   serviceMonitorSelector: {}
-  podMonitorSelector:
-    matchLabels:
-      team: core
+  podMonitorSelector: {}
   resources:
     requests:
       memory: 300Mi
@@ -24,3 +22,10 @@ spec:
     runAsNonRoot: true
     fsGroup: 2000
     runAsUser: 1000
+  alerting:
+    alertmanagers:
+    - namespace: monitoring
+      name: alertmanager-svc
+      port: web
+  ruleSelector: {}
+  ruleNamespaceSelector: {}