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# Untrusted Workload Quickstart
This document describes how to install and run the `gvisor-containerd-shim`
using the untrusted workload CRI extension. This requires containerd 1.1 or
later.
*Note: The untrusted workload CRI extension is deprecated by containerd. If you
are using containerd 1.2, please consider using runtime handler.*
## Requirements
- **runsc**: See the [gVisor documentation](https://github.com/google/gvisor) for information on how to install runsc.
- **containerd**: See the [containerd website](https://containerd.io/) for information on how to install containerd.
## Install
### Install gvisor-containerd-shim
1. Download the latest release of the `gvisor-containerd-shim`. See the
[releases page](https://github.com/google/gvisor-containerd-shim/releases)
[embedmd]:# (../test/e2e/shim-install.sh shell /{ # Step 1/ /^}/)
```shell
{ # Step 1(release): Install gvisor-containerd-shim
LATEST_RELEASE=$(wget -qO - https://api.github.com/repos/google/gvisor-containerd-shim/releases | grep -oP '(?<="browser_download_url": ")https://[^"]*gvisor-containerd-shim.linux-amd64' | head -1)
wget -O gvisor-containerd-shim ${LATEST_RELEASE}
chmod +x gvisor-containerd-shim
sudo mv gvisor-containerd-shim /usr/local/bin/gvisor-containerd-shim
}
```
2. Create the configuration for the gvisor shim in
`/etc/containerd/gvisor-containerd-shim.toml`:
[embedmd]:# (../test/e2e/shim-install.sh shell /{ # Step 2/ /^}/)
```shell
{ # Step 2: Create the gvisor-containerd-shim.toml
cat <<EOF | sudo tee /etc/containerd/gvisor-containerd-shim.toml
# This is the path to the default runc containerd-shim.
runc_shim = "/usr/local/bin/containerd-shim"
EOF
}
```
### Configure containerd
1. Update `/etc/containerd/config.toml`. Be sure to update the path to
`gvisor-containerd-shim` and `runsc` if necessary:
[embedmd]:# (../test/e2e/untrusted-workload/install.sh shell /{ # Step 1/ /^}/)
```shell
{ # Step 1: Create containerd config.toml
cat <<EOF | sudo tee /etc/containerd/config.toml
disabled_plugins = ["restart"]
[plugins.linux]
shim = "/usr/local/bin/gvisor-containerd-shim"
shim_debug = true
[plugins.cri.containerd.untrusted_workload_runtime]
runtime_type = "io.containerd.runtime.v1.linux"
runtime_engine = "/usr/local/bin/runsc"
runtime_root = "/run/containerd/runsc"
EOF
}
```
2. Restart `containerd`
```shell
sudo systemctl restart containerd
```
## Usage
You can run containers in gVisor via containerd's CRI.
### Install crictl
1. Download and install the crictl binary:
[embedmd]:# (../test/e2e/crictl-install.sh shell /{ # Step 1/ /^}/)
```shell
{ # Step 1: Download crictl
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
}
```
2. Write the crictl configuration file
[embedmd]:# (../test/e2e/crictl-install.sh shell /{ # Step 2/ /^}/)
```shell
{ # Step 2: Configure crictl
cat <<EOF | sudo tee /etc/crictl.yaml
runtime-endpoint: unix:///run/containerd/containerd.sock
EOF
}
```
### Create the nginx Sandbox in gVisor
1. Pull the nginx image
[embedmd]:# (../test/e2e/untrusted-workload/usage.sh shell /{ # Step 1/ /^}/)
```shell
{ # Step 1: Pull the nginx image
sudo crictl pull nginx
}
```
2. Create the sandbox creation request
[embedmd]:# (../test/e2e/untrusted-workload/usage.sh shell /{ # Step 2/ /^EOF\n}/)
```shell
{ # Step 2: Create sandbox.json
cat <<EOF | tee sandbox.json
{
"metadata": {
"name": "nginx-sandbox",
"namespace": "default",
"attempt": 1,
"uid": "hdishd83djaidwnduwk28bcsb"
},
"annotations": {
"io.kubernetes.cri.untrusted-workload": "true"
},
"linux": {
},
"log_directory": "/tmp"
}
EOF
}
```
3. Create the pod in gVisor
[embedmd]:# (../test/e2e/untrusted-workload/usage.sh shell /{ # Step 3/ /^}/)
```shell
{ # Step 3: Create the sandbox
SANDBOX_ID=$(sudo crictl runp sandbox.json)
}
```
### Run the nginx Container in the Sandbox
1. Create the nginx container creation request
[embedmd]:# (../test/e2e/run-container.sh shell /{ # Step 1/ /^EOF\n}/)
```shell
{ # Step 1: Create nginx container config
cat <<EOF | tee container.json
{
"metadata": {
"name": "nginx"
},
"image":{
"image": "nginx"
},
"log_path":"nginx.0.log",
"linux": {
}
}
EOF
}
```
2. Create the nginx container
[embedmd]:# (../test/e2e/run-container.sh shell /{ # Step 2/ /^}/)
```shell
{ # Step 2: Create nginx container
CONTAINER_ID=$(sudo crictl create ${SANDBOX_ID} container.json sandbox.json)
}
```
3. Start the nginx container
[embedmd]:# (../test/e2e/run-container.sh shell /{ # Step 3/ /^}/)
```shell
{ # Step 3: Start nginx container
sudo crictl start ${CONTAINER_ID}
}
```
### Validate the container
1. Inspect the created pod
[embedmd]:# (../test/e2e/validate.sh shell /{ # Step 1/ /^}/)
```shell
{ # Step 1: Inspect the pod
sudo crictl inspectp ${SANDBOX_ID}
}
```
2. Inspect the nginx container
[embedmd]:# (../test/e2e/validate.sh shell /{ # Step 2/ /^}/)
```shell
{ # Step 2: Inspect the container
sudo crictl inspect ${CONTAINER_ID}
}
```
3. Verify that nginx is running in gVisor
[embedmd]:# (../test/e2e/validate.sh shell /{ # Step 3/ /^}/)
```shell
{ # Step 3: Check dmesg
sudo crictl exec ${CONTAINER_ID} dmesg | grep -i gvisor
}
```
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