Container supply chain security in GCP - Step-by-Step Execution

Process Flow - Container supply chain security

Start: Developer writes code

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Build container image

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Scan image for vulnerabilities

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Sign image to prove authenticity

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Push image to secure registry

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Deploy container from registry

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Runtime security monitoring

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End

This flow shows how container images are created, scanned, signed, stored, deployed, and monitored to keep the supply chain secure.

Execution Sample

GCP

gcloud builds submit --tag gcr.io/my-project/my-app:v1
container analysis scan gcr.io/my-project/my-app:v1
cosign sign gcr.io/my-project/my-app:v1
kubectl apply -f deployment.yaml

This sequence builds a container image, scans it for vulnerabilities, signs it, and deploys it to Kubernetes.

Process Table

Step	Action	Tool/Command	Result	Next Step
1	Build container image	gcloud builds submit --tag gcr.io/my-project/my-app:v1	Image built and pushed to registry	Scan image
2	Scan image for vulnerabilities	gcloud container images describe gcr.io/my-project/my-app:v1 --show-package-vulnerability	No critical vulnerabilities found	Sign image
3	Sign image	cosign sign gcr.io/my-project/my-app:v1	Image signed successfully	Deploy container
4	Deploy container	kubectl apply -f deployment.yaml	Container deployed to cluster	Monitor runtime
5	Runtime security monitoring	Security tools running	No runtime threats detected	End

💡 All steps completed successfully, container supply chain secured.

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	Final
Container Image	None	Built and pushed	Scanned clean	Signed	Deployed	Running securely
Vulnerabilities	Unknown	Unknown	None critical	None critical	None detected	None detected
Signature Status	Unsigned	Unsigned	Unsigned	Signed	Signed	Signed
Deployment Status	Not deployed	Not deployed	Not deployed	Not deployed	Deployed	Deployed

Key Moments - 3 Insights

Why do we scan the container image after building it?

Scanning checks for security issues before deployment, as shown in step 2 of the execution_table where vulnerabilities are checked.

What does signing the image achieve?

Signing proves the image is authentic and untampered, as seen in step 3 where the image is signed successfully.

Why is runtime monitoring important after deployment?

Because threats can appear during operation, runtime monitoring (step 5) helps detect and respond to them.

Visual Quiz - 3 Questions

Look at the execution_table, what is the result after step 2 (Scan image)?

A Image signed successfully

B No critical vulnerabilities found

C Container deployed to cluster

D Image built and pushed to registry

💡 Hint

Check the 'Result' column for step 2 in the execution_table.

At which step is the container image signed?

A Step 1

B Step 2

C Step 3

D Step 4

💡 Hint

Look at the 'Action' column to find when signing happens.

If a vulnerability was found during scanning, which step would change?

A Step 2: Scan image for vulnerabilities

B Step 4: Deploy container

C Step 1: Build container image

D Step 5: Runtime security monitoring

💡 Hint

Vulnerabilities are detected during scanning, see step 2 in execution_table.

Concept Snapshot

Container supply chain security ensures safe software delivery.
Steps: Build image -> Scan for vulnerabilities -> Sign image -> Push to registry -> Deploy -> Monitor runtime.
Scan early to catch issues.
Sign to prove authenticity.
Monitor to detect threats during operation.

Full Transcript

Container supply chain security involves several steps to keep software safe. First, developers build a container image and push it to a registry. Next, the image is scanned for vulnerabilities to catch any security problems early. After scanning, the image is signed to prove it is authentic and has not been tampered with. Then, the signed image is deployed to a Kubernetes cluster. Finally, runtime security monitoring watches the running containers to detect any threats. This process helps ensure that only safe and trusted containers run in production.