3.2 KiB
Containerd Quick Start
This document describes how to use containerd-shim-runsc-v1
with the
containerd runtime handler support on containerd
1.2 or later.
⚠️ NOTE: If you are using Kubernetes and set up your cluster using kubeadm you may run into issues. See the FAQ for details.
Requirements
- runsc and containerd-shim-runsc-v1: See the installation guide.
- containerd: See the containerd website for information on how to install containerd.
Configure containerd
Update /etc/containerd/config.toml
. Make sure containerd-shim-runsc-v1
is in
${PATH}
or in the same directory as containerd
binary.
cat <<EOF | sudo tee /etc/containerd/config.toml
disabled_plugins = ["restart"]
[plugins.linux]
shim_debug = true
[plugins.cri.containerd.runtimes.runsc]
runtime_type = "io.containerd.runsc.v1"
EOF
Restart containerd
:
sudo systemctl restart containerd
Usage
You can run containers in gVisor via containerd's CRI.
Install crictl
Download and install the `crictl`` binary:
{
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.13.0/crictl-v1.13.0-linux-amd64.tar.gz
tar xf crictl-v1.13.0-linux-amd64.tar.gz
sudo mv crictl /usr/local/bin
}
Write the crictl
configuration file:
cat <<EOF | sudo tee /etc/crictl.yaml
runtime-endpoint: unix:///run/containerd/containerd.sock
EOF
Create the nginx sandbox in gVisor
Pull the nginx image:
sudo crictl pull nginx
Create the sandbox creation request:
cat <<EOF | tee sandbox.json
{
"metadata": {
"name": "nginx-sandbox",
"namespace": "default",
"attempt": 1,
"uid": "hdishd83djaidwnduwk28bcsb"
},
"linux": {
},
"log_directory": "/tmp"
}
EOF
Create the pod in gVisor:
SANDBOX_ID=$(sudo crictl runp --runtime runsc sandbox.json)
Run the nginx container in the sandbox
Create the nginx container creation request:
cat <<EOF | tee container.json
{
"metadata": {
"name": "nginx"
},
"image":{
"image": "nginx"
},
"log_path":"nginx.0.log",
"linux": {
}
}
EOF
Create the nginx container:
CONTAINER_ID=$(sudo crictl create ${SANDBOX_ID} container.json sandbox.json)
Start the nginx container:
sudo crictl start ${CONTAINER_ID}
Validate the container
Inspect the created pod:
sudo crictl inspectp ${SANDBOX_ID}
Inspect the nginx container:
sudo crictl inspect ${CONTAINER_ID}
Verify that nginx is running in gVisor:
sudo crictl exec ${CONTAINER_ID} dmesg | grep -i gvisor
Set up the Kubernetes RuntimeClass
Install the RuntimeClass for gVisor:
cat <<EOF | kubectl apply -f -
apiVersion: node.k8s.io/v1beta1
kind: RuntimeClass
metadata:
name: gvisor
handler: runsc
EOF
Create a Pod with the gVisor RuntimeClass:
cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
name: nginx-gvisor
spec:
runtimeClassName: gvisor
containers:
- name: nginx
image: nginx
EOF
Verify that the Pod is running:
kubectl get pod nginx-gvisor -o wide