End to end tests refs #3 (#10)

* Separate docs for containerd 1.1 and 1.2

The configuration for the untrusted workload annotation and runtime
class are different enough that it makes sense to separate the docs.

Commands in docs are taken from scripts in the docs/scripts directory.
These scripts can be used later for integration & doc tests (#3). The
docs can be updated using the embedmd tool:
https://github.com/campoy/embedmd

* Add basic e2e tests refs #3

Added end-to-end tests based on the quickstart workflows for
containerd 1.1 and containerd 1.2+.

1 files changed, 214 insertions, 0 deletions

diff --git a/docs/runtime-handler-quickstart.md b/docs/runtime-handler-quickstart.md
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+# Runtime Handler Quickstart
+
+This document describes how to install and run the `gvisor-containerd-shim`
+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 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: Download gvisor-containerd-shim
+LATEST_RELEASE=$(wget -qO - https://api.github.com/repos/google/gvisor-containerd-shim/releases | grep -oP '(?<="browser_download_url": ")https://[^"]*' | head -1)
+wget -O gvisor-containerd-shim
+chmod +x gvisor-containerd-shim
+}
+```
+
+2. Copy the binary to the desired directory:
+
+[embedmd]:# (../test/e2e/shim-install.sh shell /{ # Step 2/ /^}/)
+```shell
+{ # Step 2: Copy the binary to the desired directory
+sudo mv gvisor-containerd-shim-* /usr/local/bin/gvisor-containerd-shim
+}
+```
+
+3. Create the configuration for the gvisor shim in
+   `/etc/containerd/gvisor-containerd-shim.yaml`:
+
+[embedmd]:# (../test/e2e/shim-install.sh shell /{ # Step 3/ /^}/)
+```shell
+{ # Step 3: Create the gvisor-containerd-shim.yaml
+cat <<EOF | sudo tee /etc/containerd/gvisor-containerd-shim.yaml
+# 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/runtime-handler/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.runtimes.runsc]
+  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/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
+}
+```