Provide option to enable containerd stargz-snapshotter

[FloThinksPi]

Description

Current colima(the VM it provisions) already comes with the stargz-snapshotter preinstalled but not started or configured. To be able to use it one must ssh into the lima VM with colima ssh and configure and start the services. I used following commands to set up config/systemd-services and start them:

sudo mkdir -p /etc/containerd
sudo mkdir -p /etc/containerd-stargz-grpc/
sudo sh -c 'echo """version = 2
[plugins.\"io.containerd.grpc.v1.cri\".containerd]
  snapshotter = \"stargz\"
  disable_snapshot_annotations = false
[proxy_plugins]
  [proxy_plugins.stargz]
    type = \"snapshot\"
    address = \"/run/containerd-stargz-grpc/containerd-stargz-grpc.sock\"
""" > /etc/containerd/config.toml
echo """[Unit]
Description=stargz snapshotter
After=network.target
Before=containerd.service

[Service]
Type=notify
Environment=HOME=/root
ExecStart=/usr/local/bin/containerd-stargz-grpc --log-level=debug --config=/etc/containerd-stargz-grpc/config.toml
Restart=always
RestartSec=1

[Install]
WantedBy=multi-user.target
""" > /etc/systemd/system/stargz-snapshotter.service
sudo echo """[cri_keychain]
enable_keychain = true
image_service_path = \"/run/containerd/containerd.sock\"
""" > /etc/containerd-stargz-grpc/config.toml'
sudo systemctl daemon-reload
sudo systemctl enable stargz-snapshotter --now
sudo systemctl restart containerd

Could this be done/configured via a config property in the colima vm template(or maybe even as default) so i can use nerdctl --snapshotter=stargz run ... easily to make use of lazy pulling ?

[abiosoft]

If there are no side-effects to having it enabled, then it can be enabled by default. Yeah, the steps you detailed can be handled internally by Colima.