Skill 3.4 Create and Configure Container Flashcards
Describe containers
Allow you to package an application and all its dependencies into a compresses package called an image. A container runtime can then be installed on your computer and poitn to the image in the repository.
Why doesn’t a container need an entire operating system
because it is used the kernel of the OS which is why you can’t run a linux based kernal on a Windows computer
Describe Azure Container instances(ACI)
Easy to create containers.
Point ACI to a repository and it creates the container for you. it doesn’t require that you pay for a VM, ACI is serverless and can be access using a public IP address or a DNS name label
Describe Azure Kubernetes Service
A cloud-based implementation of the popular container orchestration service Kubernetes. Kubernetes runs on top of the containers at runtime, and it can help you scale and mange a containerized deployment
What is a convenient way to create a container for ACI
Azure Cloud Shell
How can containers be accessed
Over the internet on port 80
What is a container group
top-level object in ACI, and it represents all the containers running on a particular computer. Multiple containers being used in a container group share the same URL so you will need to specify a seperate port for each container
What are multi-container groups supported on
ONly supported on Linux.
What is the largest image you can host in ACI
15GB while the container cannot use more then 4 cpu cores and 16 gb of memory
What container properties require a delete to change
OS Type
CPU, memory, or GPU resources
Restart policy
Network profile
Availability Zone
What is Azure Kubernetes Service (AKS)
allows for orchestration that can help you to manage the complexity of a multi-container deployment
What is the resource group for the AKS Cluster
The group that you specify when you create a cluster
How many pods can use an Azure Disk
one
How can you make sure that the lifecycle of your data is not tied to the existence of your pods
By using persistent storage
What is the command line tool to manaually scale an AKS cluste
kubectl command line tool
What are the autoscaler components of AKS
Horizontal Pod Autoscaler – Scales to a maximum of five pods and minimum of two pods
Cluster Autoscaler – Scales you node clusters based on the number of pending pods
AKS options for networking
Kubernet – Called basic networking. Each node in the cluster gets an IP address from the VNet subnet where the cluster is deployed. Each pod within the cluster gets an internal IP address from an address space explicitly set aside for the pods. Uses NAT to establish connectiosn to other Azure Resources.
Azure Container Networking interface – Called Advanced networking allows both the pods and nodes to receive an IP address from the subnet
What is a kubernetes service
sits between incoming network traffic adn one or more identical pods.
What are Kubernetes Service types
Cluster IP
Nodeport
LoadBalancer
ExternalName
What is a cluster IP kubernetes service type
Provides and internal IP address that can only be used within the AKS cluster
Describe a NodePort Service Type
Provides a port mapping on the node, allowing network traffic to reach teh node using the specified port
Describe a LoadBalancer Kubernetes service connection type
Provides an Azure Load Balancer and an external IP address to allow acess to teh node as per load balancing that are created.
Describe ExternalName Kubernetes Service Type
Provides a DNS entry for AKS nodes
What is the command to check for aks updates
Az aks get-updates
Where are container images located
Inside of a image repository
What is used to download the image and then extract it to create a container that will host the image in a isolated environment
Container runtime image
Horizontal Autoscaler
Scales to a maximum of five pods and a minimum of two
Azure Autoscaling component that scales to a max of five pods and minumum of two
Horizontal Pod Autoscaler
Cluster Autoscaler
Scales based in the number of pending pods
Azure Autoscaling component that scales based on the number of pending pods
Cluster Autoscaler
