Azure Container Registry (ACR) - Step-by-Step Execution

Process Flow - Azure Container Registry (ACR)

Create ACR Instance

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Push Container Image

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Store Image in Registry

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Pull Image from Registry

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Deploy Container from Image

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Update or Delete Images

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End

This flow shows how you create an Azure Container Registry, push container images to it, store them, pull them for deployment, and manage images.

Execution Sample

Azure

az acr create --resource-group mygroup --name myregistry --sku Basic
az acr login --name myregistry
az acr repository list --name myregistry
az acr repository show-tags --name myregistry --repository myapp

This code creates an ACR, logs in to it, lists repositories, and shows tags for a repository.

Process Table

Step	Command	Action	Result
1	az acr create --resource-group mygroup --name myregistry --sku Basic	Create ACR instance	ACR 'myregistry' created in resource group 'mygroup' with Basic SKU
2	az acr login --name myregistry	Authenticate Docker client to ACR	Docker client logged in to 'myregistry'
3	az acr repository list --name myregistry	List repositories in ACR	Returns empty list [] (no images pushed yet)
4	docker build -t myregistry.azurecr.io/myapp:v1 .	Build container image tagged for ACR	Image 'myapp:v1' built locally
5	docker push myregistry.azurecr.io/myapp:v1	Push image to ACR	Image 'myapp:v1' pushed to 'myregistry'
6	az acr repository list --name myregistry	List repositories again	Returns ['myapp'] showing pushed image repository
7	az acr repository show-tags --name myregistry --repository myapp	Show tags for 'myapp'	Returns ['v1'] showing pushed image tag
8	docker pull myregistry.azurecr.io/myapp:v1	Pull image from ACR	Image 'myapp:v1' pulled successfully
9	az acr repository delete --name myregistry --image myapp:v1 --yes	Delete image tag	Image tag 'v1' deleted from 'myapp' repository
10	az acr repository list --name myregistry	List repositories after deletion	Returns [] (repository empty after tag deletion)

💡 All steps complete showing full lifecycle of image creation, push, pull, and deletion in ACR

Status Tracker

Variable	Start	After Step 1	After Step 5	After Step 7	After Step 9	Final
ACR Instance	None	myregistry created	myregistry exists	myregistry exists	myregistry exists	myregistry exists
Repositories	[]	[]	['myapp']	['myapp']	[]	[]
Image Tags in 'myapp'	[]	[]	['v1']	['v1']	[]	[]

Key Moments - 3 Insights

Why does the repository list show empty before pushing any images?

Before pushing, no images exist in the registry, so the repository list is empty as shown in step 3 of the execution_table.

What happens if you try to pull an image before pushing it?

Pulling before pushing will fail because the image does not exist in the registry yet. This is implied by the empty repository list before step 5.

Why does deleting the only tag remove the repository from the list?

In ACR, a repository exists only if it has tags. Deleting the last tag removes the repository, as shown between steps 9 and 10.

Visual Quiz - 3 Questions

Look at the execution_table, what is the repository list after pushing the image?

A []

B ['v1']

C ['myapp']

D ['myregistry']

💡 Hint

Check step 6 in the execution_table where repositories are listed after pushing.

At which step does the image get successfully pulled from the registry?

A Step 8

B Step 5

C Step 4

D Step 10

💡 Hint

Look for the 'docker pull' command in the execution_table.

If you delete the only tag of a repository, what happens to the repository list?

A Repository is renamed

B Repository is removed from the list

C Repository remains listed

D Repository tags become empty but repository stays

💡 Hint

Refer to steps 9 and 10 in the execution_table showing repository list changes after deletion.

Concept Snapshot

Azure Container Registry (ACR) stores container images securely.
Create ACR with 'az acr create'.
Push images using Docker tagged with ACR login.
List repositories and tags with 'az acr repository list' and 'show-tags'.
Pull images for deployment.
Deleting all tags removes the repository.

Full Transcript

Azure Container Registry (ACR) is a service to store container images. First, you create an ACR instance in your Azure resource group. Then you log in to it using Azure CLI. Initially, the registry has no images, so listing repositories returns empty. You build a container image locally and tag it with your registry's login server name. Next, you push the image to ACR. After pushing, the repository appears in the list with its tags. You can pull the image from ACR to deploy containers. If you delete all tags of a repository, the repository disappears from the list. This flow shows the lifecycle of container images in ACR from creation to deletion.