How do I restrict container filesystem access to read-only?
In this guide, we will demonstrate how to restrict filesystem access to read-only for containers in a Kubernetes Pod using Pulumi. This is an important security measure to ensure that the containers cannot modify the filesystem, thereby preventing potential security breaches.
We will create a Kubernetes Pod with a container that has its filesystem set to read-only. This is achieved by setting the readOnlyRootFilesystem
security context to true
.
import * as pulumi from "@pulumi/pulumi";
import * as k8s from "@pulumi/kubernetes";
// Define the Kubernetes Pod
const pod = new k8s.core.v1.Pod("readonly-pod", {
metadata: {
name: "readonly-pod",
},
spec: {
containers: [{
name: "nginx",
image: "nginx:latest",
securityContext: {
readOnlyRootFilesystem: true, // Set the root filesystem to read-only
},
}],
},
});
// Export the Pod name
export const podName = pod.metadata.name;
Key Points
- Security Context: The
securityContext
field is used to specify security settings for the container. - Read-Only Filesystem: Setting
readOnlyRootFilesystem
totrue
ensures that the container’s root filesystem is read-only. - Kubernetes Pod: We define a Kubernetes Pod with a single container running the Nginx image.
Conclusion
In this guide, we demonstrated how to restrict filesystem access to read-only for a container in a Kubernetes Pod using Pulumi. This security measure helps in preventing unauthorized modifications to the container’s filesystem.
Deploy this code
Want to deploy this code? Sign up for a free Pulumi account to deploy in a few clicks.
Sign upNew to Pulumi?
Want to deploy this code? Sign up with Pulumi to deploy in a few clicks.
Sign upThank you for your feedback!
If you have a question about how to use Pulumi, reach out in Community Slack.
Open an issue on GitHub to report a problem or suggest an improvement.