Edge site with a K8s cluster and a Prometheus monitoring server

The MEC site is a server and service provider closer to the end user (IoT) and implements an Industry4.0 management and orchestration (MANO) system to increase the performance by:

hosting microservices (Applications containerized)
monitoring infrastructure, applications and communication resources
processing monitored metrics
optimizing processed metrics
scaling resources
slicing networks and resources (edge-slicing)

The hosting of the applications is performed in a Kubernetes (K8s) cluster running in a virtual machine (VM) on top of an OpenStack private cloud server. The applications are containerized as Docker containers and are deployed in the K8s cluster as Pod instances. The K8s cluster consists of only one node with both master and worker functionalities, to simplify its deployment and is divided into seperated working spaces, called namespaces, to run applications in a better resource management manner. Prometheus, the monitoring tool of the whole infrastructure, is running as a Pod inside the cluster, in the namespace monitoring, and is responsible for monitoring the K8s cluster, Prometheus itself, and all the rest hosting applications.

Moreover, Prometheus retrieves metrics from a 5G network, which complements the BIND5G architecture and provides the communication of the Industry4.0 IoT devices. The 5G network utilized by the project is an Amarisoft propietary solution and consists of two main components, the LTEENB and LTEMME, implemented entirely in software and running on a PC. LTEENB is an LTE/NR base station (eNodeB/gNodeB), while LTEMME is an LTE EPC (Evolved Packet Core)/NR 5GC (5G Core Network) implementation. The metrics are exposed to the Prometheus server with the help of an Amarisoft exporter running in the K8s cluster.

Finally, the K8s cluser is added to OSM, an open-source Management and Orchestration stack aligned with ETSI NFV Information Models. The purpose of this integration is for onboarding Kubernetes Network Functions (KNFs) orchestrated by OSM, from one hand side to scale MEC´s resources when it is necessary, and on the other hand side to slice the networks in order to build an infrastructure that is fully programmable, automated and designed for the Industry4.0 needs.

Therefore, this document provides guidelines on how to set-up a K8s cluster and integrated it with OSM, and how to expose infrastructure, application and network type of metrics to a Prometheus server.

The reader will be familiar with basic kubectl commands and will learn i) how to install, apply, delete, and edit Kubernetes manifest files, ii) how to get lists of Pods, Deployments, Services and Namespaces, iii) how to install and upgrade helm charts, iv) how to connect applications to a Prometheus server, v) understand how to monitor a K8s cluster and vi) learn basic osm commands to create a vim account and add a K8s cluster to OSM.

Note: To follow this tutorial, a clean ubuntu distribution is needed either in a bare-metal machine or a virtual machine. Also, an IDE program needs to be installed in order to create and edit manifest files. Optionally to browse application GUIs, a browser needs to be installed as well.

Set up a K8s cluster

A K8s cluster is composed of many nodes, which can be splitted into two types:

The master node, which hosts the K8s control plane that controls and manages the whole K8s system
The worker nodes that run the actual applications which are deployed

The more efficient way to a fully functioning Kubernetes cluster is by using kubeadm. kubeadm is a tool that sets up a single or multi-node cluster that is great for both testing Kubernetes and developing apps in bare-metal implementations. Also, it is a manual cluster installation that helps us to configure it in that way to be compliant with OSM. Other possible methods to set up a K8s cluster can be found here .

Create a K8s cluster

To create a K8s cluster on a bare-metal or virtual machine, a container runtime, the kubelet, kubectl, and kubeadm tool must be installed.

A container runtime, also known as container engine, is a software component that can run containers on a host operating system. Docker (Containerd) is the leading container system, offering a full suite of features, with free or paid options. It is the default Kubernetes container runtime, providing image specifications, a command-line interface (CLI) and a container image-building service.

The kubelet, in Kubernetes, is an agent that runs on every computing node and receives commands specifying what containers should be running, and relays them to a container runtime on the node. It also collects information from the container runtime about currently running containers, and passes it back to the Kubernetes control plane.

kubectl is the command line tool for communicating with a Kubernetes cluster's control plane and kubeadm, as described above, is the tool to set-up a K8s cluster.

Container runtime installation

Getting the Docker gpg key to install docker:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Add the Docker Ubuntu repository:

sudo apt-get update
sudo apt-get install ca-certificates curl gnupg lsb-release
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Update the packages:
```
sudo apt-get update
```

Install docker and docker components:

sudo apt-get install -y docker-ce docker-ce-cli containerd.io

Kubernetes components installation (kubelet, kubectl, kubeadm)

Get the Kubernetes gpg key:

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -

Add the Kubernetes repository:

cat << EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list deb https://apt.kubernetes.io/ kubernetes-xenial main EOF

Update the packages:
```
sudo apt-get update
```

Install kubelet, kubeadm, and kubectl with the latest or a specific version:

sudo apt-get install -y kubelet=1.20.11-00 kubeadm=1.20.11-00 kubectl=1.20.11-00

Hold them at the current version:

sudo apt-mark hold kubelet kubeadm kubectl

kubeadm cluster initiation

Beforehand swappoff the swapp memory
```
sudo swapoff -a
```

Initialize the kubeadm cluster

sudo kubeadm init --pod-network-cidr=10.244.0.0/16

Set up local kubeconfig

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

Note: In ~/.kube/config lies K8s cluster configuration file. This file will be neccessary later to add the K8s cluster to OSM

Apply Flannel CNI network overlay

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

Since we want to follow an all-in-one node approach, we have to schedule pods in the master.

Untaint the master:

kubectl taint nodes --all node-role.kubernetes.io/master-

Cluster requirements for OSM integration

The K8s cluster to be added later on and integrates with OSM must fullfil the following requirements:

installation and configuration of a load balancer for the cluster
installation of a persistent volume storage (openebs) and define it as the default storageclass
special permission of Tiller

Metallb is a very powerful, easy to configure, load balancer for kubernetes.

Apply the following k8s manifest to install it in the cluster:

kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.8.3/manifests/metallb.yaml

After the installation, metallb has to be configured. The configuration of metallb in layer2 is via a Configmap kind manifest. Thus a configuration_metallb.yaml file has to be created (e.g in an IDE program) and has to be applied in the cluster The configmap kind manifest looks like this:


apiVersion: v1

kind: ConfigMap

metadata:

namespace: metallb-system

name: config

data:

config: |

address-pools:

- name: default

protocol: layer2

addresses:

- 172.21.248.20-172.21.248.250

Note: Visual studio code is an efficient IDE to syntax yaml manifests

Create the configuration_metallb.yaml file

Apply the file into the cluster:

kubectl apply -f configuration_metallb.yaml

Note: We should ensure that the range of IP address defined in metallb are accessible from outside the cluster and is not overlapped with other devices in that network. Also this network should be reachable from OSM since OSM will need it to communicate with the cluster.

Next, apply a kubernetes persistent volume storage with the following manifest:
```
kubectl apply -f https://openebs.github.io/charts/openebs-operator.yaml
```
Check if there is a default storageclass in the cluster after the installation:
```
kubectl get storageclass
```

Until now, there is not default storageclass defined. Define openebs-hostpath as default storageclass with the command below:

kubectl patch storageclass openebs-hostpath -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

Confrim the default starageclass and check the results:
```
kubectl get storageclass
```

For Kubernetes clusters > 1.15 there is needed special permission of Tiller that can be added by the following command:

kubectl create clusterrolebinding tiller-cluster-admin --clusterrole=cluster-admin --serviceaccount=kube-system:default

Note: It is possible the Tiller permission to be already configured in the latest versions of K8s.

K8s cluster basic configuration

At this point we have a full-functioning K8s cluster. To obtain more information of the cluster, the running Nodes and Pods, we can execute the following commands. As we can see, all commands use kubectl, the command line communication tool for the K8s cluster.

Obtain information for the cluster
```
kubectl cluster-info
```
List the running Nodes (option -o wide gives more info)

kubectl get nodes or kubectl get nodes -o wide
List all the running Pods in all the Namespaces

kubectl get pods --all-namespaces or kubectl get pods -A
List the Namespaces of the cluster
```
kubectl get namespaces
```
Create a Namespace with a spesific name, for example bind5g
```
kubectl create namespace bind5g
```

Make a namespace the default working Namespace

kubectl config set-context --current --namespace=bind5g

By default the K8s cluster has already a Namespace called default. To return back to default Namespace we simply run again the same command:
```
kubectl config set-context --current --namespace=bind5g
```
Delete the Namespace bind5g
```
kubectl delete namespace bind5g
```

Additional docker related commands to obtain inormation for the containers running in the cluster (optional):

List the running containers
```
sudo docker ps
```
List the running and stopped containers
```
sudo docker ps -a
```
List containers filtered with a specific status
```
docker ps -f "status=exited"
```

Manage a K8s cluster

To deploy toy-example applications in the cluster, we create a separate Namespace called toy-example.

Create namespace toy-example
```
kubectl create Namespace toy-example
```
Check the creation of toy-example Namespace:
```
kubectl get namespace
```
List the Pods under this Namespace:
```
kubectl get pods -n toy-example
```

Note: As we havent deployed any pods yet, the output of this commnad will be no resources found in this namespace

Also, we create a folder for all the toy-example applications in the host machine with mkdir toy-example

Deploy a simple apache web application

First, we deploy a simple php-apache web application from an online yaml manifest file into the toy-example namespace:

Apply the php-apache web app into the cluster

kubectl apply -f https://k8s.io/examples/application/php-apache.yaml --namespace=toy-example

Next, we add load (infinite web requests) with another manifest file called infinity-calls.yaml. If we monitor later on the behaviour of this application with Prometheus the added load will provoke changes on the performance of the application. The manifest file of infinity-calls.yaml is described in the following code:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: infinite-calls-nginx
  labels:
    app: infinite-calls-nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: infinite-calls-nginx
  template:
    metadata:
      name: infinite-calls-nginx
      labels:
        app: infinite-calls-nginx
    spec:
      containers:
      - name: infinite-calls-nginx
        image: busybox
        command:
        - /bin/sh
        - -c
        - "while true; do wget -q -O- http://my-nginx; done"

Navigate into the toy-example folder in the machine
```
cd toy-example
```

Create and apply the infinite-calls.yaml to the cluster

kubectl apply -f infinite-calls-nginx.yaml --namespace=toy-example

Check the current running pods in the toy-example namespace
```
kubectl get pods -n toy-example
```

Check the deployment and service of the pod

kubectl get deployments -n toy-example
kubectl get service -n toy-example

Deploy a simple mongodb application

Create the following manifest file with an IDE to toy-example folder

 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mongodb-deployment
   labels:
     app: mongodb
 spec:
   replicas: 1
   selector:
     matchLabels:
       app: mongodb
   template:
     metadata:
       labels:
         app: mongodb
     spec:
       containers:
       - name: mongodb
         image: mongo
         ports:
         - containerPort: 27017
 ---
 apiVersion: v1
 kind: Service
 metadata:
   name: mongodb-service
 spec:
   selector:
     app: mongodb
   ports:
     - protocol: TCP
       port: 27017
       targetPort: 27017

Apply the manifest file to the K8s cluster

kubectl apply -f mongodb_app.yaml --namespace=toy-example

Check the pod, deployment and service of the mongodb application

kubectl get deployments -n toy-example
kubectl get service -n toy-example
kubectl get pods -n toy-example

Deploy a simple nodejs Hello World application with 5 replicasets

In this part, we deploy a simple nodejs Hello World application that has only a Deployment Kubernetes kind in the manifest file and is configured to create 5 pods of the same application.

Apply it in the K8s cluster:

kubectl apply -f https://k8s.io/examples/service/load-balancer-example.yaml --namespace=toy-example

Check the Pod, Deployment, Service and Replicasets of the nodejs application

kubectl get deployments -n toy-example
kubectl get service -n toy-example
kubectl get pods -n toy-example
kubectl get replicasets -n toy-example

We will notice that there is no Service related to this application. Every Deployment kind always creates a Pod (1 or more depending the value of Replicasets). To expose the application to the outside world a Service kind is needed.

Create a Service object that exposes the deployment:

kubectl expose deployment hello-world -n toy-example --type=LoadBalancer --name=my-nodejs-service

Note: hello-world is the name of the Deployment and my-nodejs-service is the name of the Service

Note: kubectl apply -f command creates and deployes a file which is either in the web (online in a repo) or in a host folder. To delete a deployed application we use kubectl delete -f applicaition_name.yaml When we want to delete a yaml file we deployed from the host computer we must be on the same folder this file exists. Then we can execute the kubectl delete command.

Monitor a K8s cluster

To monitor a K8s cluster and its running applications there are native and third party solutions. For example metrics-server lies under the native solutions while Prometheus is an open-source monitoring tool, which can be installed and deployed inside the cluster.

Native monitoring tools (metrics-server)

Metrics-server is a scalable, efficient source of container resource metrics for Kubernetes built-in autoscaling pipelines.

Metrics-server collects resource metrics from kubelets and exposes them in Kubernetes apiserver through Metrics API for use by Horizontal Pod Autoscaler and Vertical Pod Autoscaler. Metrics API can also be accessed by kubectl top, making it easier to debug autoscaling pipelines.

Apply metrics-server in the cluster

kubectl apply -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

Check metrics-server in the K8s cluster
```
kubectl get pods -n kube-system
```
If metrics-server is not working properly we have to edit the Deployment
```
kubectl edit deployment/my-nginx -n kube-system 
```

and add the --kubelet-insecure-tls line in the Deployment

 spec:
 
 containers:
 
 - args:
 
 - --cert-dir=/tmp
 
 - --secure-port=4443
 
 - --kubelet-preferred-address-types=InternalDNS,InternalIP,ExternalDNS,ExternalIP,Hostname
 
 - --kubelet-insecure-tls 
 
 - --kubelet-use-node-status-port

Another way which is preferred is to configure the components.yaml file from the manifest, but first the initial metrics-server manifest must be deleted

Delete the metrics-server manifest file and then get (download) the file to your host machine

kubectl delete -f https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
wget https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml

Open it with an IDE program. Edit the file by adding --kubelet-insecure-tls in the Deployment kind and Save it.
Apply it in the cluster:
```
kubectl apply -f components.yaml
```
Check whether the metrics-server app is installed by running the following command:
```
kubectl get pods --all-namespaces | grep metrics-server
```
Once metrics-server is properly installed, we can use it with
```
kubectl top pod
kubectl top node
```

This will show us metrics from all the Pods in the default Namespace and metrics from the Nodes.

Monitoring with a Prometheus Server

A Prometheus server can be installed either as a binary or as a container. In a K8s cluster the easiest and most efficient way is through helm charts. Helm charts are a collection of Kubernetes manifest files, which make the installation of an application simpler. kube-prometheus stack is a collection of Kubernetes manifests, Grafana dashboards, and Prometheus rules combined with documentation and scripts to provide easy to operate end-to-end Kubernetes cluster monitoring with Prometheus using the Prometheus Operator.

Note: This chart was formerly named prometheus-operator chart, now renamed to more clearly reflect that it installs the kube-prometheus project stack, within which Prometheus Operator is only one component.

Installing Helm from binary releases:

wget https://get.helm.sh/helm-v3.6.2-linux-amd64.tar.gz
tar -zxvf helm-v3.6.2-linux-amd64.tar.gz
sudo mv linux-amd64/helm /usr/local/bin/helm

From there, we should be able to run some helm commands and add the stable repo:

helm help
helm repo add stable https://charts.helm.sh/stable
helm repo update
helm repo list
helm list

More installation methods of helm can be found here .

Back to Prometheus kube-stack installation process, we will get the helm repository and install it.

Get Repo Info

helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update
helm install prometheus-mec prometheus-community/kube-prometheus-stack -n monitoring --create-namespace --set prometheus.service.type="LoadBalancer"

We notice that with the helm install command we can pass switches to configure the installation. With -n monitoring we declare to apply the prometheus stack in the monitoring Namespace, which we actually create it with the --create-namespace command. Also, we can set the Service type of Prometheus server as LoadBalancer.

Note: There are four types of Kubernetes Services — ClusterIP, NodePort, LoadBalancer and ExternalName. The type property in the Service's spec determines how the service is exposed to the network.

To change the Service from one type to another, for example from LoadBalancer to NodePort, we can upgrade the helm chart with helm upgrade command:

Upgrade helm chart

helm upgrade prometheus-mec prometheus-community/kube-prometheus-stack -n monitoring --set prometheus.service.type="NodePort" --set grafana.service.type="NodePort"

Check status with

kubectl --namespace monitoring get pods -l "release=prometheus-mec"

Obtain all the Kubernetes kinds in the monitoring Namespace with:
```
kubectl get all -n monitoring 
```

To find more information on how to access the GUI of Prometheus and Grafana, we can focus only on kubectl get service command and check the collumns TYPE, CLUSTER-IP and PORTS.

List services of monitoring Namespace
```
kubectl get service -n monitoring 
```

Note: As we mentioned earlier there are four types of Services and one of the is ClusterIP. The collumn though CLUSTER-IP simply denotes the ip address of the Service regardless the Service type

Note: If the Service type of a Pod or Deployment is ClusterIP we can browse this application through the hosts browser. In case we access the cluster remotely for example with ssh and floating ips, we have to change the type to NodePort, and to browse the application we use the floating ip and the NodePort port.

Note: The credentials to access the Grafana GUI are username: admin and password: prom-operator

Expose metrics to Prometheus with kube-eagle exporter

Kube-eagle is a prometheus exporter which exports various metrics of kubernetes pod resource requests, limits and it's actual usages. It was created with the purpose to provide a better overview of your kubernetes cluster resources, so that you can optimize the resource allocation.

Note: Metrics-server is a prerequisite for Kube Eagle to work.

By using helm charts as in the Prometheus case we simplify the deployment of kube-eagle exporter.

Add helm repo and install it in monitoring Namespace

helm repo add kube-eagle https://raw.githubusercontent.com/cloudworkz/kube-eagle-helm-chart/master
helm repo update    
helm install kube-eagle kube-eagle/kube-eagle -n monitoring --create-namespace
helm upgrade kube-eagle kube-eagle/kube-eagle -n monitoring --set serviceMonitor.create=true --set serviceMonitor.releaseLabel=prometheus-mec

Note: Check how Prometheus server auto-discovers kube-eagle exporter with the release label prometheus-mec in the ServiceMonitor section

Optionally, another way to configure the installation of a helm chart is through the values.yaml file. See how the values.yaml file looks like with the helm show values command following with the reponame and chart name:

helm show values kube-eagle/kube-eagle

We can use the values.yaml file either with the helm install or with the helm upgrade command.

Run again the helm show values command and save the output into a yaml file
```
helm show values kube-eagle/kube-eagle > values.yaml 
```

Edit the values.yaml file and apply it again in the cluster

helm upgrade kube-eagle kube-eagle/kube-eagle -n monitoring -f values.yaml

Deploy Prometheus exporters for the applications of toy-example namespace

To monitor the mongodb application we deployed on the toy-example Namespace, we need application-specific Prometheus exporters. The Prometheus exporters are intermidiate programs which help us to expose the desired metrics to Prometheus server. These exporters translate the application metrics to Prometheus format and expose the metrics to endpoints. Then Prometheus server with the ServiceMonitor feature discovers the exporter and scrapes its endpoint to collect the metrics. A list of already implemented exporters can be found here and the figure illustrates how Prometheus is scraping the exporters

Note: There are exporter installations with helm charts which makes it easier to be deployed. If an exporter does not come with a helm chart, we have to deploy and configure mannually the exporter in the cluster as we will see later on.

Lets add a mongodb exporter through a helm chart.

Show and save mongodb exporter´s value.yaml file

helm show values prometheus-community/prometheus-mongodb-exporter > values.yaml

Edit it as follows

 mongodb:
   uri: "mongodb://mongodb-service:27017"
 
 serviceMonitor:
   namespace: toy-example
   additionalLabels:
     release: prometheus-mec

Install it by passing the value.yaml file

helm install mongodb-exporter prometheus-community/prometheus-mongodb-exporter -f values.yaml --namespace=toy-example

Now, let us deploy an NGINX application with an NGINX exporter as a side-car container and deploy it mannualy in the cluster in the Namespace toy-example.

Create the Deployment kind manifest file

 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: nginx-website
   namespace: toy-example
   labels:
     app: website
 spec:
   replicas: 3
   selector:
     matchLabels:
       app: website
   template:
     metadata:
       labels:
         app: website
     spec:
       containers:
       - env:
         image: quay.io/igou/igou.io-nginx:latest
         imagePullPolicy: Always
         name: igou-website
         ports:
         - containerPort: 80
         livenessProbe:
           httpGet:
             scheme: HTTP
             path: /
             port: 80
           initialDelaySeconds: 30
           timeoutSeconds: 30
         volumeMounts:
         - mountPath: /etc/nginx/conf.d/nginx-status.conf
           name: nginx-status-conf
           readOnly: true
           subPath: nginx.status.conf
       - name: nginx-exporter
         image: 'nginx/nginx-prometheus-exporter:0.3.0'
         args:
           - '-nginx.scrape-uri=http://localhost:8090/nginx_status'
         ports:
           - name: nginx-ex-port
             containerPort: 9113
             protocol: TCP
         imagePullPolicy: Always
       volumes:
       - configMap:
           defaultMode: 420
           name: nginx-status-conf
         name: nginx-status-conf

Create the Service kind manifest file

 apiVersion: v1
 kind: Service
 metadata:
   labels:
     app: website
   name: nginx-website
   namespace: toy-example
 spec:
   ports:
   - port: 80
     protocol: TCP
     targetPort: 80
     name: http
   - port: 9113
     protocol: TCP
     targetPort: 9113
     name: metrics
   selector:
     app: website
   sessionAffinity: None
   type: ClusterIP

Create the ConfigMap kind manifest file

 apiVersion: v1
 data:
   nginx.status.conf: |
     server {
         listen       8090 default_server;
         location /nginx_status {
             stub_status;
             access_log off;
         }
     }
 kind: ConfigMap
 metadata:
   name: nginx-status-conf
   namespace: toy-example

Create the ServiceMonitor kind manifest file

 apiVersion: monitoring.coreos.com/v1
 kind: ServiceMonitor
 metadata:
   name: nginx-website
   namespace: toy-example
   labels:
     release: prometheus-mec
 spec:
   selector:
     matchLabels:
       app: website
   endpoints:
   - port: metrics
     interval: 30s

Note: Check how we connect the exporter with the Prometheus server with the additional label, release: prometheus-mec under the metadata section

With --- inside a yaml file we can separete Kubernetes kinds and we can apply them by calling only one file. For example as we can see below in the same yaml manifest file igou_deployment_service.yaml, we have the Deployment and the Service kind.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-website
  namespace: toy-example
  labels:
    app: website
spec:
  replicas: 3
  selector:
    matchLabels:
      app: website
  template:
    metadata:
      labels:
        app: website
    spec:
      containers:
      - env:
        image: quay.io/igou/igou.io-nginx:latest
        imagePullPolicy: Always
        name: igou-website
        ports:
        - containerPort: 80
        livenessProbe:
          httpGet:
            scheme: HTTP
            path: /
            port: 80
          initialDelaySeconds: 30
          timeoutSeconds: 30
        volumeMounts:
        - mountPath: /etc/nginx/conf.d/nginx-status.conf
          name: nginx-status-conf
          readOnly: true
          subPath: nginx.status.conf
      - name: nginx-exporter
        image: 'nginx/nginx-prometheus-exporter:0.3.0'
        args:
          - '-nginx.scrape-uri=http://localhost:8090/nginx_status'
        ports:
          - name: nginx-ex-port
            containerPort: 9113
            protocol: TCP
        imagePullPolicy: Always
      volumes:
      - configMap:
          defaultMode: 420
          name: nginx-status-conf
        name: nginx-status-conf

---

apiVersion: v1
kind: Service
metadata:
  labels:
    app: website
  name: nginx-website
  namespace: toy-example
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
    name: http
  - port: 9113
    protocol: TCP
    targetPort: 9113
    name: metrics
  selector:
    app: website
  sessionAffinity: None
  type: ClusterIP

Apply this manifest file to the cluster with

kubectl apply -f igou_deployment_service.yaml

Apply the configmap manifest file
```
kubectl apply -f igou_cm.yaml
```
Apply the servicemonitor manifest file
```
kubectl apply -f igou_sm.yaml
```

Monitoring general architectural flow in a K8s cluster with Prometheus

The figure below demonstrates the way metrics are exposed to a Prometheus server running in a K8s cluster

The exposed metrics can be classified into two categories

K8s cluster metrics
- Metrics for monitoring K8s nodes such as classic sysadmin level metrics (through node-exporter or kube-eagle) cpu, load, memory, disk, etc..
- Orchestration level metrics (through kube-state-metrics) like deployments, pods, replica status, nodes
- Metrics for monitoring containers: Container resource level metrics (through kubelet/cadvisor and kube-eagle
Specific application metrics
- Metrics exposed by specific exporters, which are either running a a side-car containers alongside the main application´s container or as a seperate deployment kind

The figure below shows the list of the endpoints Prometheus server is scraping. Check the kube-eagle exporter, the NGINX exporter, the mongodb exporter, the node exporter from prometheus-stack, the kube-state-metrics from prometheus stack and kubelet/cadvisor a Kubernetes control plane component which is exposing container and hardware statistics as Prometheus metrics out of the box.

Note: The Amarisoft exporter has not been deployed yet. This snapshot has been taken at the end of the tutorial. Thus, on the next section we will deploy the Amarisoft exporter and configure it to appear in the targets list.

Monitor an Amarisoft mobile network server

On behalf of BIND5G project the large-scale 5G Amarisoft network is exploited. The large-scale 5G Amarisoft network consists of the core, RAN and UE parts, all running in the same PC as a softwarized solution. Smartphones with 5G sim cards can also be connected to this 5G network. Also, part of the Amarisoft solution are a remote API to provide communication with the RAN and core part, and a GUI to monitor and visualize the status and performance of the network. As a result, there are three ways to monitor the 5G Amarisoft network:

Remote Api
Amarisoft server GUI
Amarisoft monitoring exporter

Bofore we start the monitoring phase, the Amarisoft server must be turned on and be configured either in Non-stand alone (NSA) or stand alone (SA) mode.

Connect to Amarisoft large scale network with ssh from a local terminal:
```
ssh [email protected]
password: *****
sudo su
```
Choose between NSA or SA mode through the Core-BS configuration procedure.

NSA mode:

Core part:

cd
cd mme/config
ln -sf mme-ims.cfg  mme.cfg

Base station part:

cd
cd enb/config
ln -sf swallow_nsa.xml swallow.xml
ln -sf gnb-nsa-dl-ul-slot-conf.cfg  enb.cfg

SA mode:

Core part:

cd
cd mme/config
ln -sf mme-ims.cfg  mme.cfg

Base station part

cd
cd enb/config
ln -sf swallow_sa.xml swallow.xml
ln -sf gnb-sa.cfg  enb.cfg

Initiate the 5G network

Switch on the socket (V0 or V4)
Stop Radio Remote Head service rmu stop
Reboot Amarisoft large-scale service lte restart
Verify the network has been deployed correctly screen -x lte
Choose eNB screen (Ctrl+a+n) s1 for NSA, or ng for SA
To exit from screen (Ctrl+a+d)
GUI access to check logs or to monitor and visualize Amarisoft server through the browser url: 192.168.15.209/lte
Terminate connection and network when your work is done service lte stop
Switch off the socket either from V0 or V4

Monitor Amarisoft with Remote Api

Both Amarisoft EPC/5GC and ENB/gNB are providing communication via a remote API. The protocol used is WebSocket as defined in RFC 6455. The messages exchanged between the client and MME/ENB server are in strict JSON format. The APIs of both EPC and ENB are providing a plethora of messages (config_get, config_set, log_get, stats, ue_get, etc. …). More information can be found in the documentation core and basestation files.

From a local machine running a linux distro, we can request messages to the Amarisost server by running the remote node-js api (ws.js). First though we need to install node.js and websocket.

Install node.js and websocket with:

sudo apt update
sudo apt install nodejs
node -v
sudo apt install npm
npm -v
sudo npm install nodejs-websocket

Second, we need the ws.js application, which can be found in one of the folders of the Amarisoft server.

Copy and paste it in a folder (amarisoft-websocket) in the machine that hosts the K8s cluster or any other machine with linux terminal:
```
scp [email protected]:/root/enb/doc/ws.js /home/ubuntu/amarisoft-websocket/
```

If the command failes due to security reasons, we can follow a reverse approach:

From the machine thar runs the Amarisoft server, copy the ws.js application and paste it in a temporary folder
```
cp /root/enb/doc/ws.js /tmp/
```
Change user ownership for the given file
```
chown user /tmp/ws.js
```
Copy the app from the Amarisoft server and paste it in the amarisoft-websocket folder to the machine that runs the K8s cluster or any other machine with linix terminal:
```
scp [email protected]:/tmp/ws.js /home/ubuntu/amarisoft-websocket
```

Then, we have to navigate to the folder where the ws.js application is cd amarisoft-websocket, and to request messages.

Request a config_get messages to gNB (5G Base Station):
```
./ws.js 192.168.0.1:9001 '{"message": "config_get"}'
```

Request a config_get messagea to mme (5GCore):

./ws.js 192.168.0.1:9000 '{"message": "config_get"}'

Note: Other message-types we can request are: stats, ue_get, logs_get

Note: Amarisoft server can handdle up to 31 simultaneusly websocket connections

Amarisoft monitoring exporter

To retrieve communication metrics (core and radio) from the 5G network an Amarisoft monitoring exporter is used.

The Amarisoft Radio monitoring is based on Prometheus and on another method called collectd. Collectd is a daemon which collects system and application performance metrics periodically and provides mechanisms to store the values in a variety of ways. The collectd daemon has implemented two plugins. The write_prometheus and the python plugin. The write_prometheus plugin is used to listen to queries from the Prometheus server, but also to translate the metrics to a form that can be read from the Prometheus server. The python plugin embeds a Python interpreter into the collectd and exposes the API to the python-scripts. We can name the Collectd alongside with the python plugin as the amarisoft exporter.

In the amarisoft exporter there are two configuration files that define the IP addresses of the core and base station that need to be monitored. There are also implemented two python Scripts, one for the core and one for the base station that initiate a websocket connection with the Amarisoft server components.

Note: The Amarisoft exporter used for the BIND5G project differentiates from the original one mentioned on the medianetlab repository on the defined metrics. The python scripts defining the metrics have been customized, with ws.close commands and more metric names.

Run Amarisoft exporter in a local machine (optional)

As an optional step, before we deploy the Amarisoft exporter in the K8s cluster, we can deploy it and run it as a container and expose the metrics to another containerized Prometheus server outside of the K8s cluster. In this way, we can relate how containers and pods work.

Also, we will demonstrate two ways to deploy the amarisoft exporter as a container, one with the docker compose command and the other with the docker run command.

1st way with the docker compose command:

Download amarisoft-exporter-application.tar.gz and extract the files
```
tar -xvzf amarisoft-exporter.tar.gz
```

Move to the plugins folder to edit the core and base station IPs

cd ~/amarisoft-prometheus-exporter-collectd_20220225/collectd/collectd/data/plugins

Configure the EPC list with the appropriate IP address of the Amarisoft server
```
vim epc_list.cfg
```
Configure the ENB list with the appropriate IP address of the Amarisoft server
```
vim enb_list.cfg
```
Change folder to collectd
```
cd collectd
```
Start the docker as a daemon
```
sudo docker-compose up -d
```
Amarisoft exporter is now running, verify metrics show up with:
```
curl http://localhost:9103/metrics
```
To stop and remove the container (do not stop it yet, as we need to expose metrics to Prometheus)
```
sudo docker-compose down
```

2nd way with the docker run command:

Download and extract the files as in 1st way

Move to the plugins folder to edit the core and base station IPs

cd ~/amarisoft-prometheus-exporter-collectd_20220225/collectd/collectd/data/plugins

Configure the EPC list with the appropriate IP address of the Amarisoft server
```
vim epc_list.cfg
```
Configure the ENB list with the appropriate IP address of the Amarisoft server
```
vim enb_list.cfg
```
Change folder to collectd
```
cd collectd
```

Run the container

sudo docker run -d -p 9103:9103 -v ${PWD}/data:/etc/collectd -v ${PWD}/data/types.db:/usr/share/collectd/types.db --name amarisoft-exporter-2 medianetlab/collectd

Let's move now to deploy the containerized prometheus server. Running Prometheus on Docker is as simple as docker run -p 9090:9090 prom/prometheus

Run prometheus server

docker run -p 9090:9090 prom/prometheus

Prometheus to discover and scrape the containerized Amarisoft exporter has to be configured and a new job name category must be added on the prometheus.yaml file. This is the main configuration file, in which we declare which targets Prometheus scrapes. To edit this file we can do it by creating a file in our host machine and pasting it inside the container.

Create the following file:

 # my global config
 global:
     scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
     evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
   # scrape_timeout is set to the global default (10s).
   # Alertmanager configuration
 alerting:
     alertmanagers:
 	    - static_configs:
 		    - targets:
 				  # - alertmanager:9093
 
 # Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
 rule_files:
 # - "first_rules.yml"
 # - "second_rules.yml"
 
 # A scrape configuration containing exactly one endpoint to scrape:
 # Here it's Prometheus itself.
 scrape_configs:
 # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
   - job_name: "prometheus"
 # metrics_path defaults to '/metrics'
 # scheme defaults to 'http'.
     static_configs:
       - targets: ["localhost:9090"]
   - job_name: "collectd"
     static_configs:
       - targets: ["172.17.x.x:9103"]

Note: target IP is the targets-container IP, for example Amarisoft´s exporter container IP. Commands to obtain container´s IP are: sudo docker exec dockerhive_namenode cat /etc/hosts, and inside the container ifconfig, ip a, systemd-resolve --status | grep Current, ip -4 -o address

Copy the newly locally created prometheus.yaml file to the container

sudo docker cp prometheus.yaml container_id:/etc/prometheus/prometheus.yaml

Or we can enter isnide the container and search for this file.

sudo docker exec –ti container_id sh
cd /etc/prometheus/prometheus.yaml

Add the following lines:

 - job_name: 'collectd'
   scrape_interval: 5s
   static_configs:
       - targets: ['172.17.x.x:9103']

Edit it with vi or another editor:

vi prometheus.yaml
Restart Prometheus container to update the list of the discovered targets
```
sudo  killall -HUP Prometheus
```

Note: The comand sudo killall -HUP Prometheus we run it while we are inside the container

Finally access Prometheus GUI at localhost:9090 and check the targets

Run Amarisoft exporter in a K8s cluster

Extract the files from amarisoft-exporter-application.tar.gz
```
tar -xf amarisoft-exporter-application.tar.gz
```
Move to ~/amarisoft-prometheus-exporter-collectd_20220225/collectd/data/pluginsand edit the enb_list file with 192.169.15.209 IP and the epc_list file with 192.169.15.209 IP. The files can be eddited either with vim or with another editor.

Use the following manifest file amari_deployment_service_servicemonitor_all.yaml which contains the Deployment, the Service and the ServiceMonitor Kubernetes kind to deploy the Amarisoft exporter into the cluster

 apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: deployment-amarisoft-exporter-all
   namespace: amarisoft
   labels:
     app: amari-exporter-all
 spec:
   selector:
     matchLabels:
       app: amari-exporter-all
   template:
     metadata:
       labels:
         app: amari-exporter-all
     spec:
       containers:
       - name: collectd-exporter
         image: medianetlab/collectd
         imagePullPolicy: Always
         ports:
         - containerPort: 9103
         volumeMounts:
         - mountPath: /etc/collectd
           name: data-folder-all
         - mountPath: /usr/share/collectd/types.db
           name: types-file-all
       restartPolicy: Always
       volumes:
       - name: data-folder-all
         hostPath:
           path: /home/ubuntu/amarisoft-prometheus-exporter-collectd_20220225/collectd/data
           type: Directory
       - name: types-file-all
         hostPath: 
           path: /home/ubuntu/amarisoft-prometheus-exporter-collectd_20220225/collectd/data/types.db
           type: File

 ---

 apiVersion: v1
 kind: Service
 metadata:
   labels:
     app: amari-exporter-all
   name: service-amarisoft-exporter-all
   namespace: amarisoft
 spec:
   ports:
   - port: 9103
     protocol: TCP
     targetPort: 9103
     name: metrics
   selector:
     app: amari-exporter-all
   type: ClusterIP

 ---

 apiVersion: monitoring.coreos.com/v1
 kind: ServiceMonitor
 metadata:
   name: amarisoft-exporter-all
   namespace: amarisoft
   labels:
     release: prometheus-mec
 spec:
   selector:
     matchLabels:
       app: amari-exporter-all
   endpoints:
   - port: metrics
     interval: 5s

Create a folder called amarisoft_manifests, move into the folder, create the file there and apply it into the cluster
```
mkdir amarisoft_manifests
cd amarisoft_manifests
kubectl apply -f amari_deployment_service_servicemonitor_all.yaml
```

Note: Servicemonitor kind is needed for Prometheus to auto-discover the Amarisoft export and to scrape it. This is achieved with the release label prometheus-mec

Check the Amarisoft exporter Pod, Deployment, Service and ServiceMonitor creation in the Namespace amarisoft

kubectl get pods -n amarisoft
kubectl get deployments -n amarisoft
kubectl get service -n amarisoft
kubectl get servicemonitor -n amarisoft

Confirm that Prometheus server from the monitoring Namespace discovers the exporter and also scrapes it by browsing Prometheus GUI -> Status -> Targets
Check that Amarisoft exporter is running properly through the logs, where amarisoft_exporter_pod_name is the name of the Amarisoft Pod from the kubectl get pod -n amarisoft command
```
kubectl logs <amarisoft_exporter_pod_name> -n amarisoft
```

Since pods are abstraction layers of containers we can see the same logs from the running container inside the od

Check container´s logs

sudo docker ps | grep collectd
sudo docker log <container_id>

Amarisoft exporter retrieved metrics

The retrieved metrics from the Core network are:

Number of UEs in EMM-REGISTERED or 5GMMREGISTERED state
List of NGAP connections betweens RANs and AMF (PLMN, gNB, IP address and port of the RAN, List of the Tracking Areas served by the RAN, Number of UEs in 5GMM-CONNECTED state for this NGAP connection)
Total downlink bytes in PDNs
Total uplink bytes in PDNs
UEs id in the CORE part
5GS QoS flow ID. Present for
NR UEs.
UEs id in the plmn
UEs id in the radio part
RAN id
Currently registered users
PDU session ID. Used for NR UEs
Total downlink transferred bytes of bearers or PDU sessions
Total uplink transferred bytes of bearers or PDU sessions

The retrieved metrics from the RAN are:

LTE/5G NR frequency band indicator
Cell gain in dB
Downlink frequency
Downlink EARFCN
Downlink NR absolute radio frequency channel number
Cell ID
Maximum QAM size used in downlink
Maximum QAM size used in uplink
Number of downlink resource blocks
Number of uplink resource blocks
Number of antennas in the downlink
Number of antennas in the uplink
RF port number index
NR ARFCN of the SSB carrier
Uplink frequency
Uplink EARFCN
Uplink NR absolute radio frequency channel number
PLMN identity part of the global gNB ID, gNB identity part of the global gNB ID, gNB name
Total Cell throughput in Downlink (bit/sec)
Total Cell throughput in Uplink (bit/sec)
Number of downlink transmitted transport blocks (without retransmissions)
Number of downlink retransmitted transport blocks
Number of received uplink transport blocks (without CRC error)
Number of received uplink transport blocks with CRC errors
Number of ng connections
RF port TX-RX average latency
RF port TX-RX maximum latency
RF port TX-RX minimum latency
RF port TX-RX latency standard deviation
RF CPU usage from the receiver
Sample rate in MHz
Maximum sample value for the received samples
RMS sample value for the received samples
Number of saturation events in the Tx side
Maximum sample value for the sent samples
RMS sample value for the sent samples
Number of saturation events in the Rx side
RF transmission frequency, in MHz
Tx RF transmission gain, in dB
RF reception frequency, in MHz
Rx RF reception gain, in dB
Number of connected users
Downlink throughput per connected user
Uplink throughput per connected user
Channel quality indicator per connected user
Energy per resource element in dBm per connected user
Average downlink MCS per connected user
Average uplink MCS per connected connected user
SNR in dB per connected user
Number of downlink retransmitted transport blocks per connected user
Number of received uplink transport blocks with CRC errors per connected user
Last reported rank indicator per connected user
Average turbo/ldpc decoder pass per connected user
Maximum turbo/ldpc decoder pass per connected user
Minimum turbo/ldpc decoder pas per connected user
Number of downlink transmitted transport blocks (without retransmissions) per connected user
Number of received uplink transport blocks (without CRC error) per connected user
Last computed UL path loss in dB, estimated from PHR per connected user
Last received power headroom report. To retrieve the value in dB, refer to 3GPP 36.133 table 9.1.8.4

OSM integration

Installing OSM

OSM installation is based on a K8s cluster deployment. OSM installer creates by default a K8s cluster and inside of it creates a Namespace osm. Under the Namespace osm lies OSM with its elements. Some of these elements are OSM CLI, OSM GUI, MON, Prometheus, and Grafana.

Commands for installing OSM:

wget https://osm-download.etsi.org/ftp/osm-11.0-eleven/install_osm.sh
chmod +x install_osm.sh
./install_osm.sh

After the installation is finished, list all the OSM elements with:
```
kubectl get all -n osm
```
To browse into the OSM GUI with your preferred browser, use the IP of the output of the following command:
```
kubectl get service/ng-ui -n osm 
```

Note: The credentials for the OSM GUI are username: admin, password: admin

Monitoring an OSM installation

MON is an element to monitor VMs in NFVI and VNFs. The metrics from NFVI are collected through the VIM and the metrics from NFVs are collected through VCA (VNF Configuration and Abstraction). Metrics need to be defined on VNF descriptors for MON to collect them.

OSM installation can include add-ons (extra components), if options are added on the installation command. For example, to install OSM with the k8s_monitor add-on use the command ./install_osm.sh --k8s_monitor

Note: It is suggested though by OSM community not to follow an OSM installation with the k8s_monitor add-on. It is advised users to follow the method that is described below

Install OSM without the monitoring option

Clone the master branch of the OSM devops repo

git clone http://osm.etsi.org/gerrit/osm/devops.git

Install the monitoring component

devops/installers/k8s/install_osm_k8s_monitoring.sh

Update the OSM Grafana configuration (name of a datasource)

kubectl -n osm apply -f devops/installers/docker/osm_pods/grafana.yaml

Restart the Grafana pod to take changes

export GRAFANA_POD=$(kubectl get pods -n osm -l "app=grafana" -o jsonpath="{.items[0].metadata.name}")
kubectl -n osm delete pod $GRAFANA_POD

k8s_monitor add-on is for adding some components to monitor the K8s cluster hosting OSM, not VNFs or KNFs. You'll get those additional components in the monitoring Namespace, and not in the osm Namespace. It uses Prometheus operator, node exporter and other exporters for mysql and mongo. OSM without add-ons installation comes by default with another Prometheus server, and a Grafana instance (as pods) in the osm Namespace.

Check where Prometheus of osm Namespace is listening to and browse the GUI with your preferred browser
```
kubctl get service -n osm
```
Check where Grafana of osm Namespace is listening to and browse the GUI with your preferred browser
```
kubctl get service -n osm
```

Note: The credentials for Grafana GUI are username: admin, password: admin

Check where Prometheus of monitoring Namespace is listening to and browse the GUI with your preferred browser
```
kubctl get service -n monitoring
```

Note: --k8s_monitor add-on installs another Prometheus server to monitor the cluster that hosts OSM in the monitoring namespace

OSM configuration & integration with the K8s cluster

OSM ETSI framework can orchestrate virtual, containerized and hybrid network services. To achieve this VNFs and KNFs are needed. VNFs are running on VMs (or Virtual Deployment Units) and KNFs are running on containers (or Kubernetes Deployment Units). VMs are hosted/running in an NFVI and are managed by a virtual orchestration tool like Openstack (to be noted Openstack is more than that as it is a cloud operating system). Containers are hosted/running in a cloud native infrastructure (CNI) and are managed by a container orchestration tool like Kubernetes.

OSM ETSI framework interact with NVFI-VNFs and/or CNI-KNFs through another entity called VIM. Openstack itself can be considered as a VIM and can be added in the VIM list. Although Openstack itself can be considered as a VIM and can be added in the VIM list, a K8s cluster cannot. Thus, and to comply with OSM, a “Dummy” VIM must be created and listed. Therefore, an OSM-VIM(Dummy)-K8s connection is established with the following command on the OSM client:

osm vim-create --name bind5g-vim --user u --password p --tenant p --account_type dummy --auth_url http://localhost/dummy

where the options:

-- name: Vim´s name, any name can be given
--user: user´s name, any name can be given
--password: password´s name, any name can be given
--tenant: tenant´s name, any name can be given
--account_type: vim type, dummy name must be given
--auth_url: vim´s url, a url has to be given even if it doesnt exist since dummy vim is not a phisical vim

As a result, a K8s cluster can be deployed under or outside the VIM´s network.

Under a VIM´s network the cluster is connected to OSM through the hosted VIM and is deployed following the instructions of Method 1 and 2 of ANNEX 7: Kubernetes installation and requirements of OSM´s official documentation.

Outside of the VIM´s network the cluster is connected to OSM through the Dummy VIM and is deployed as Annex 7, Method 3: Manual cluster installation steps for Ubuntu.

Since, the K8s cluster of the MEC site is implemented following the Method 3, we can add the MEC/K8s cluster by executing the following command:

osm k8scluster-add bind5g-cluster --creds /home/ubuntu/bind5g/k8s_cluster/config --vim bind5g-vim --k8s-nets '{k8s_net1: null }' --version 'v1.20.11' --description='K8s baremetal cluster’

where the options:

--creds: path to k8s config file, the /.kube/config file must be copied and pasted from the machine running the K8s cluster to the machine that runs OSM
--vim: dummy vim´s name
--k8s-nets: k8s_net1 is the name of K8s network and null is the nam eof the VIM´s network
--version: verison of the K8s cluster, version of kubelet,kubectl,kubeadm
--description: description of the K8s cluster

Note: MEC/K8s cluster is where OSM will deploy KNFs, and it is NOT the K8s cluster on which OSM is installed

Final remarks & future intentions

Following the above steps, the MEC site with the K8s cluster looks like this:

Note: namespace v3_apps denotes the applications which will be installed in the next steps related to the IoT devices and the Optimizer which will process and optimize the metrics.

A graphical illustration of the integration of the MEC and the OSM alongside with their monitoring components of the BIND5G architecture is shown in the figure below:

A high-level block representation with all the BIND5G components is presented here, where the red arrows show how OSM manages and orchestrates the whole arcitecture:

Functionalities such as scalling K8s cluster resources with OSM and deploying helm-chart with KNFs are discussed and described on the Edge OpenAPI section.

Name		Name	Last commit message	Last commit date
Latest commit History 7 Commits
amarisoft-exporter-manifests		amarisoft-exporter-manifests
kubernetes-configuration		kubernetes-configuration
metallb-configuration		metallb-configuration
metrics-server-configuration		metrics-server-configuration
miscellaneous		miscellaneous
openapi		openapi
prometheus-jobs-configuration		prometheus-jobs-configuration
toy-examples		toy-examples
README.md		README.md
amarisoft-exporter-application.tar.gz		amarisoft-exporter-application.tar.gz

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Edge site with a K8s cluster and a Prometheus monitoring server

Set up a K8s cluster

Create a K8s cluster

Container runtime installation

Kubernetes components installation (kubelet, kubectl, kubeadm)

kubeadm cluster initiation

Cluster requirements for OSM integration

K8s cluster basic configuration

Manage a K8s cluster

Deploy a simple apache web application

Deploy a simple mongodb application

Deploy a simple nodejs Hello World application with 5 replicasets

Monitor a K8s cluster

Native monitoring tools (metrics-server)

Monitoring with a Prometheus Server

Expose metrics to Prometheus with kube-eagle exporter

Deploy Prometheus exporters for the applications of toy-example namespace

Monitoring general architectural flow in a K8s cluster with Prometheus

Monitor an Amarisoft mobile network server

Monitor Amarisoft with Remote Api

Amarisoft monitoring exporter

Run Amarisoft exporter in a local machine (optional)

Run Amarisoft exporter in a K8s cluster

Amarisoft exporter retrieved metrics

OSM integration

Installing OSM

Monitoring an OSM installation

OSM configuration & integration with the K8s cluster

Final remarks & future intentions

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Edge site with a K8s cluster and a Prometheus monitoring server

Set up a K8s cluster

Create a K8s cluster

Container runtime installation

Kubernetes components installation (kubelet, kubectl, kubeadm)

kubeadm cluster initiation

Cluster requirements for OSM integration

K8s cluster basic configuration

Manage a K8s cluster

Deploy a simple apache web application

Deploy a simple mongodb application

Deploy a simple nodejs Hello World application with 5 replicasets

Monitor a K8s cluster

Native monitoring tools (metrics-server)

Monitoring with a Prometheus Server

Expose metrics to Prometheus with kube-eagle exporter

Deploy Prometheus exporters for the applications of toy-example namespace

Monitoring general architectural flow in a K8s cluster with Prometheus

Monitor an Amarisoft mobile network server

Monitor Amarisoft with Remote Api

Amarisoft monitoring exporter

Run Amarisoft exporter in a local machine (optional)

Run Amarisoft exporter in a K8s cluster

Amarisoft exporter retrieved metrics

OSM integration

Installing OSM

Monitoring an OSM installation

OSM configuration & integration with the K8s cluster

Final remarks & future intentions

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