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authorAdin Scannell <ascannell@google.com>2020-07-09 16:59:42 -0700
committerAdin Scannell <ascannell@google.com>2020-07-09 16:59:42 -0700
commit5471dbe2f36976eb61f8c8fe8eaafd5da0569779 (patch)
tree08fa0f9691189012085c5a515dd81dea46a105e2 /shim/runtime-handler-shim-v2-quickstart.md
parent5946f111827fa4e342a2e6e9c043c198d2e5cb03 (diff)
parent7f8172edf583e0d26bee5e06578a442c7507ba6f (diff)
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+# Runtime Handler Quickstart (Shim V2)
+
+This document describes how to install and run `containerd-shim-runsc-v1` using
+the containerd runtime handler support. This requires containerd 1.2 or later.
+
+## 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 containerd-shim-runsc-v1
+
+1. Build and install `containerd-shim-runsc-v1`.
+
+<!-- TODO: Use a release once we have one available. -->
+[embedmd]:# (../test/e2e/shim-install.sh shell /{ # Step 1\(dev\)/ /^}/)
+```shell
+{ # Step 1(dev): Build and install gvisor-containerd-shim and containerd-shim-runsc-v1
+ make
+ sudo make install
+}
+```
+
+### Configure containerd
+
+1. Update `/etc/containerd/config.toml`. Make sure `containerd-shim-runsc-v1` is
+ in `${PATH}`.
+
+[embedmd]:# (../test/e2e/runtime-handler-shim-v2/install.sh shell /{ # Step 1/ /^}/)
+```shell
+{ # Step 1: Create containerd config.toml
+cat <<EOF | sudo tee /etc/containerd/config.toml
+disabled_plugins = ["restart"]
+[plugins.linux]
+ shim_debug = true
+[plugins.cri.containerd.runtimes.runsc]
+ runtime_type = "io.containerd.runsc.v1"
+EOF
+}
+```
+
+2. Restart `containerd`
+
+```shell
+sudo systemctl restart containerd
+```
+
+## Usage
+
+You can run containers in gVisor via containerd's CRI.
+
+### Install crictl
+
+1. Download and install the crictl binary:
+
+[embedmd]:# (../test/e2e/crictl-install.sh shell /{ # Step 1/ /^}/)
+```shell
+{ # Step 1: Download crictl
+wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.13.0/crictl-v1.13.0-linux-amd64.tar.gz
+tar xf crictl-v1.13.0-linux-amd64.tar.gz
+sudo mv crictl /usr/local/bin
+}
+```
+
+2. Write the crictl configuration file
+
+[embedmd]:# (../test/e2e/crictl-install.sh shell /{ # Step 2/ /^}/)
+```shell
+{ # Step 2: Configure crictl
+cat <<EOF | sudo tee /etc/crictl.yaml
+runtime-endpoint: unix:///run/containerd/containerd.sock
+EOF
+}
+```
+
+### Create the nginx Sandbox in gVisor
+
+1. Pull the nginx image
+
+[embedmd]:# (../test/e2e/runtime-handler/usage.sh shell /{ # Step 1/ /^}/)
+```shell
+{ # Step 1: Pull the nginx image
+sudo crictl pull nginx
+}
+```
+
+2. Create the sandbox creation request
+
+[embedmd]:# (../test/e2e/runtime-handler/usage.sh shell /{ # Step 2/ /^EOF\n}/)
+```shell
+{ # Step 2: Create sandbox.json
+cat <<EOF | tee sandbox.json
+{
+ "metadata": {
+ "name": "nginx-sandbox",
+ "namespace": "default",
+ "attempt": 1,
+ "uid": "hdishd83djaidwnduwk28bcsb"
+ },
+ "linux": {
+ },
+ "log_directory": "/tmp"
+}
+EOF
+}
+```
+
+3. Create the pod in gVisor
+
+[embedmd]:# (../test/e2e/runtime-handler/usage.sh shell /{ # Step 3/ /^}/)
+```shell
+{ # Step 3: Create the sandbox
+SANDBOX_ID=$(sudo crictl runp --runtime runsc 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
+}
+```
+
+### Set up the Kubernetes Runtime Class
+
+1. Install the Runtime Class for gVisor
+
+[embedmd]:# (../test/e2e/runtimeclass-install.sh shell /{ # Step 1/ /^}/)
+```shell
+{ # Step 1: Install a RuntimeClass
+cat <<EOF | kubectl apply -f -
+apiVersion: node.k8s.io/v1beta1
+kind: RuntimeClass
+metadata:
+ name: gvisor
+handler: runsc
+EOF
+}
+```
+
+2. Create a Pod with the gVisor Runtime Class
+
+[embedmd]:# (../test/e2e/runtimeclass-install.sh shell /{ # Step 2/ /^}/)
+```shell
+{ # Step 2: Create a pod
+cat <<EOF | kubectl apply -f -
+apiVersion: v1
+kind: Pod
+metadata:
+ name: nginx-gvisor
+spec:
+ runtimeClassName: gvisor
+ containers:
+ - name: nginx
+ image: nginx
+EOF
+}
+```
+
+3. Verify that the Pod is running
+
+[embedmd]:# (../test/e2e/runtimeclass-install.sh shell /{ # Step 3/ /^}/)
+```shell
+{ # Step 3: Get the pod
+kubectl get pod nginx-gvisor -o wide
+}
+```