How to monitor Docker/Containers with Microsoft Azure Monitor

#azure #webdev #beginners #tutorial

Azure Monitor For Containers

Monitors the performance of containers deployed to several platforms. You can monitor below:

• Azure Kubernetes Service (AKS)

• Self-managed K8 cluster hosted on Azure using AKS Engine

• Azure Container Instances

• Self-managed K8 clusters hosted on Azure Stack or on-premises

• Azure Red Hat OpenShift

• Azure Arc enabled Kubernetes

Implementing Azure Monitor for Kubernetes

Let’s create and deploy a docker container to AKS. Source code for azure app insight for docker container.

Creating MVC application with docker

• First create MVC asp.net project select docker Linux support.

• Run project locally

• Package this app in container and deploy into container registry

• You can use Docker hub or Azure Container Registry

Creating Azure Container Registry

• Next I am going to use Azure Container Registry Service to create new container registry.

• Under repository of my container registry My MVC application docker image will appear.

• Visual Studio will package my app into a docker image and deploy to my azure docker container registry.

• Once my docker image any docker host like Azure Container Instances or Azure Kubernetes Service (AKS).

Publishing Asp.net Docker Image to Azure

• Right click application and publish

• Select Docker Container Registry

• Next select azure container registry

• Select your resource group and azure container registry to publish then select publish. It will take some time to publish your image to Azure Container Registry.

What is the meaning of word Kubernetes?

The name “Kubernetes” stems from an ancient Greek word for “helmsman,” (someone who steers a ship, like a container ship) which explains the ship wheel logo.

Creating Kubernetes Cluster in Azure

Kubernetes Cluster concepts

Azure Container Registry has Docker Image and in order to connect to your own docker container image you will get container name and registry name that will help you to host your docker image to any Azure container hosting services.

Azure Kubernetes Cluster host the docker container and exposes the container into public 8080 port using in-built high performance load balancer.

1. You need pod workflow from Kubernetes Cluster which will connect to the container registry using container name and registry name and create internal 80 port for your app.

2. Next you need service to expose internal port 80 to public 8080 over load balancer.

While creating Kubernetes Cluster remember 3 things.

1. Authentication method : required to connect Azure Container Registry to get the docker image.

2. Integration : Which Container Registry to select your own Container Registry that is we created where we have our docker image.

3. You can check the performance of your container by going to the Monitor Insights. Once our container will be deployed to the Kubernetes then we can observe performance.

Here is the YML for creating POD in k8 cluster.

apiVersion: v1
kind: Pod
metadata:
  name: insights-demo01 # give any name
  labels:
    app: insights-demo01 # app name
    component: netcore-app
spec:
  containers: # which container u want to deploy
    - image: regdemo01.azurecr.io/appcontainerinsightsdemo:latest # <NameOfTheContainerRegistry>/<NAMEofTheDockerContainer>:latest
      name: webapi
      ports:
        - containerPort: 80

YML for creating service in K8 cluster.

apiVersion: v1
kind: Service
metadata:
  labels:
    app: insights-demo01 # give any name
  name: insights-demo01 # give any name
spec:
  ports:
    - port: 8080 # public port
      protocol: TCP
      targetPort: 80 # internal port
  selector:
    app: insights-demo01
    component: netcore-app
  type: LoadBalancer

References

1. What's the difference between Azure Security Center, Azure Defender and Azure Sentinel?