gvisor

gVisor extension

Installation

See Installing Extensions.

Usage

gVisor requires unprivileged user namespace creation, so Talos default setting should be overridden:

machine:
  sysctls:
    user.max_user_namespaces: "11255"

Warning! This disables KSPP best practices setting.

Testing

default

Apply the following manifest to run nginx pod via gVisor:

apiVersion: node.k8s.io/v1
kind: RuntimeClass
metadata:
  name: gvisor
handler: runsc
---
apiVersion: v1
kind: Pod
metadata:
  name: nginx-gvisor
spec:
  runtimeClassName: gvisor
  containers:
  - name: nginx
    image: nginx

The pod should be up and running:

$ kubectl get pods
NAME           READY   STATUS    RESTARTS   AGE
nginx-gvisor   1/1     Running   0          40s

With platform KVM (requires nested virtualization or bare-metal)

Apply the following manifest to run nginx pod via gVisor with kvm platform:

apiVersion: node.k8s.io/v1
kind: RuntimeClass
metadata:
  name: gvisor
handler: runsc-kvm
---
apiVersion: v1
kind: Pod
metadata:
  name: nginx-gvisor
spec:
  runtimeClassName: gvisor
  containers:
  - name: nginx
    image: nginx

The pod should be up and running:

$ kubectl get pods
NAME           READY   STATUS    RESTARTS   AGE
nginx-gvisor   1/1     Running   0          40s

Hint: You can run both runtime handlers in parallel by naming them different