Merge pull request #19 from krasi-georgiev/remove-coreos-operator

remove coreos-operator dependancy
objectiser · Nov 14, 2017 · db59bbf · db59bbf
2 parents 50239fe + 60e94a1
commit db59bbf
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diff --git a/Kubernetes.md b/Kubernetes.md
@@ -20,27 +20,11 @@ NOTE: After using `kubectl create -f ...` to deploy something to Kubernetes, use
 is fully running before moving onto the next step.
 
 ## Prometheus
-
-To obtain metrics from the deployed services, we will use the
-[coreos prometheus operator](https://coreos.com/operators/prometheus/docs/latest/user-guides/getting-started.html)
-project. To install, use the following command:
-
-```
-kubectl create -f https://raw.githubusercontent.com/coreos/prometheus-operator/v0.11.0/bundle.yaml
-```
-
-Add configuration to locate service monitors based on label "team: frontend":
+Add configuration to locate services to be monitored based on annotations: prometheus.io/scrape: "true".
 
 ```
 kubectl create -f prometheus-kubernetes.yml
 ```
-
-The actual service monitors will be configured with the deployed services.
-
-TODO: Currently there is one service monitor per service - using the label associated with the app. However
-it may be good to try having a single service monitor with a more generic label, which the services can
-be associated with.
-
 Open the Prometheus dashboard using the link returned from:
 
 ```

diff --git a/OpenShift.md b/OpenShift.md
@@ -4,54 +4,33 @@ This example will use [minishift](https://docs.openshift.org/latest/minishift/ge
 First step is to start this environment:
 
 ```
-minishift start --openshift-version=v3.6.0-alpha.2
+minishift start
 ```
 
-You can use a more [recent version](https://github.com/openshift/origin/releases) if available.
-
-NOTE: The alpha version is currently required, as the previous stable version does not include Kubernetes RBAC authorizaion
-support.
-
 When fully started, then launch the dashboard using the link displayed following `The server is accessible via web console at:
 `. Log in using the credentials `developer/developer` and navigate to the `New Project` overview page.
 
-NOTE: After using `oc create -f ...` to deploy something to Kubernetes, use the console to check that it
+NOTE: After using `oc create -f ...` to deploy something to OpenShift, use the console to check that it
 is fully running before moving onto the next step.
 
 ## Prometheus
-
-To obtain metrics from the deployed services, we will use the
-[coreos prometheus operator](https://coreos.com/operators/prometheus/docs/latest/user-guides/getting-started.html)
-project. To install, use the following command:
+Add configuration to locate services to be monitored based on annotations: prometheus.io/scrape: "true".
 
 ```
 oc login -u system:admin
-
 oc adm policy add-cluster-role-to-user cluster-admin system:serviceaccount:myproject:default
-oc adm policy add-cluster-role-to-user cluster-admin system:serviceaccount:myproject:prometheus-operator
-
-oc create -f https://raw.githubusercontent.com/coreos/prometheus-operator/v0.11.0/bundle.yaml
-```
-
-Add configuration to locate service monitors based on label "team: frontend":
-
-```
 oc create -f prometheus-kubernetes.yml
 ```
 
 The actual service monitors will be configured with the deployed services.
 
-TODO: Currently there is one service monitor per service - using the label associated with the app. However
-it may be good to try having a single service monitor with a more generic label, which the services can
-be associated with.
-
 The next step is to create a route to make the Prometheus UI URL accessible:
 
 ```
 oc create route edge prometheus --service=prometheus
 ```
 
-Go to the OpenShift console Overview, expand the entry for `prometheus-prometheus` and you will see a link of the form https://prometheus-myproject.192.168.42.161.nip.io/ which can be used to open the Prometheus console.
+Go to the OpenShift console Overview, expand the entry for `prometheus` and you will see a link of the form https://prometheus-myproject.192.168.42.161.nip.io/ which can be used to open the Prometheus console.
 
 ## OpenTracing
 

diff --git a/prometheus-kubernetes.yml b/prometheus-kubernetes.yml
@@ -1,28 +1,92 @@
-apiVersion: monitoring.coreos.com/v1alpha1
-kind: Prometheus
+---
+apiVersion: extensions/v1beta1
+kind: Deployment
 metadata:
   name: prometheus
 spec:
-  serviceMonitorSelector:
-    matchLabels:
-      team: frontend
-  version: v1.6.3
-  resources:
-    requests:
-      memory: 400Mi
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: prometheus
+    spec:
+      containers:
+      - image: prom/prometheus:v2.0.0
+        name: prometheus
+        command:
+        - "/bin/prometheus"
+        args:
+        - "--config.file=/etc/prometheus/prometheus.yml"
+        - "--storage.tsdb.path=/prometheus"
+        - "--storage.tsdb.retention=24h"
+        ports:
+        - name: web
+          containerPort: 9090
+          protocol: TCP
+        volumeMounts:
+        - mountPath: "/prometheus"
+          name: data
+        - mountPath: "/etc/prometheus"
+          name: config
+        resources:
+          requests:
+            cpu: 100m
+            memory: 100Mi
+          limits:
+            cpu: 500m
+            memory: 2500Mi
+      volumes:
+      - emptyDir: {}
+        name: data
+      - configMap:
+          name: prometheus
+        name: config
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: prometheus
+data:
+  prometheus.yml: |
+    global:
+      scrape_interval:     15s
+    scrape_configs:
+    - job_name: 'kubernetes-pods'
+      kubernetes_sd_configs:
+      - role: pod
+      relabel_configs:
+      - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
+        action: keep
+        regex: true
+      - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path]
+        action: replace
+        target_label: __metrics_path__
+        regex: (.+)
+      - source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
+        action: replace
+        regex: ([^:]+)(?::\d+)?;(\d+)
+        replacement: $1:$2
+        target_label: __address__
+      - action: labelmap
+        regex: __meta_kubernetes_pod_label_(.+)
+      - source_labels: [__meta_kubernetes_namespace]
+        action: replace
+        target_label: kubernetes_namespace
+      - source_labels: [__meta_kubernetes_pod_name]
+        action: replace
+        target_label: kubernetes_pod_name
 ---
 apiVersion: v1
 kind: Service
 metadata:
   name: prometheus
 spec:
-  type: NodePort
+  type: LoadBalancer
   ports:
   - name: web
     nodePort: 30900
     port: 9090
     protocol: TCP
     targetPort: web
   selector:
-    prometheus: prometheus
-
+    app: prometheus
diff --git a/simple/services-kubernetes.yml b/simple/services-kubernetes.yml
@@ -8,6 +8,8 @@ spec:
     metadata:
       labels:
         app: ordermgr
+      annotations:
+        prometheus.io/scrape: "true"
     spec:
       containers:
       - name: ordermgr 
@@ -49,19 +51,6 @@ spec:
     protocol: TCP
     targetPort: web
 ---
-apiVersion: monitoring.coreos.com/v1alpha1
-kind: ServiceMonitor
-metadata:
-  name: ordermgr
-  labels:
-    team: frontend
-spec:
-  selector:
-    matchLabels:
-      app: ordermgr
-  endpoints:
-  - port: web
----
 apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
@@ -72,6 +61,8 @@ spec:
     metadata:
       labels:
         app: accountmgr
+      annotations:
+        prometheus.io/scrape: "true"
     spec:
       containers:
       - name: accountmgr 
@@ -109,18 +100,4 @@ spec:
   - name: web
     port: 8080
     protocol: TCP
-    targetPort: web
----
-apiVersion: monitoring.coreos.com/v1alpha1
-kind: ServiceMonitor
-metadata:
-  name: accountmgr
-  labels:
-    team: frontend
-spec:
-  selector:
-    matchLabels:
-      app: accountmgr
-  endpoints:
-  - port: web
-
+    targetPort: web