Docker Swarm support

[dehy]

Is your feature request related to a problem? Please describe.
Is this plugin compatible with Docker Swarm?

Docker seems to support CSI plugins https://github.com/moby/moby/blob/master/docs/cluster_volumes.md

[dehy]

Exemple of work done by Hetzner Cloud hetznercloud/csi-driver#374

[dehy]

So, my research, for now, have come to those findings:

https://docs.docker.com/engine/extend/
https://github.com/moby/moby/blob/master/docs/cluster_volumes.md#creating-a-docker-csi-plugin

Building the plugin for docker swarm

apt install golang-go
git clone -b release-0.3 https://github.com/dehy/scaleway-csi.git
cd scaleway-csi
make docker-build
IMAGE=scaleway/scaleway-csi:$(git rev-parse HEAD)-$(go env GOARCH)
id=$(docker create $IMAGE true)
mkdir -p scaleway-csi/rootfs
docker export "$id" | tar -x -C scaleway-csi/rootfs/
docker rm -vf "$id"
docker rmi $IMAGE

cat > scaleway-csi/config.json <<EOF
{
  "description": "Scaleway csi-driver for Docker",
  "documentation": "https://www.scaleway.com/fr/block-storage/",
  "entrypoint": ["/scaleway-csi", "--endpoint", "unix:///run/docker/plugins/scaleway-csi.sock"],
  "interface": {
    "types": ["docker.csicontroller/1.0","docker.csinode/1.0"],
    "socket": "scaleway-csi.sock"
  },
  "env": [
    { "name": "CSI_ENDPOINT", "value": "unix:///run/docker/plugins/scaleway-csi.sock" },
    { "name": "SCW_DEFAULT_ZONE", "value": "", "settable": ["value"] },
    { "name": "SCW_DEFAULT_PROJECT_ID", "value": "", "settable": ["value"] },
    { "name": "SCW_ACCESS_KEY", "value": "", "settable": ["value"] },
    { "name": "SCW_SECRET_KEY", "value": "", "settable": ["value"] }
  ],
  "linux": {
    "capabilities": ["CAP_SYS_ADMIN"]
  },
  "network": {
    "type": "host"
  },
  "propagatedMount": "/data/published"
}
EOF

docker plugin create scaleway-csi scaleway-csi/
docker plugin set scaleway-csi SCW_DEFAULT_ZONE=fr-par-1
docker plugin set scaleway-csi SCW_DEFAULT_PROJECT_ID=<TO REPLACE>
docker plugin set scaleway-csi SCW_ACCESS_KEY=<TO REPLACE>
docker plugin set scaleway-csi SCW_SECRET_KEY=<TO REPLACE>
docker plugin enable scaleway-csi

docker volume create --driver scaleway-csi test-volume --type block --sharing onewriter --limit-bytes 5G

But the volume is not created

$ docker volume ls --cluster
VOLUME NAME   GROUP     DRIVER         AVAILABILITY   STATUS
test-volume             scaleway-csi   active         pending creation

docker daemon logs

Mar 06 15:12:56 web1 dockerd[1500481]: time="2024-03-06T15:12:56.373418778+01:00" level=debug msg="Calling HEAD /_ping"
Mar 06 15:12:56 web1 dockerd[1500481]: time="2024-03-06T15:12:56.374102227+01:00" level=debug msg="Calling POST /v1.44/volumes/create"
Mar 06 15:12:56 web1 dockerd[1500481]: time="2024-03-06T15:12:56.374519265+01:00" level=debug msg="form data: {\"ClusterVolumeSpec\":{\"AccessMode\":{\"BlockVolume\":{},\"Scope\":\"single\",\"Sharing\":\"onewriter\"},\"AccessibilityRequirements\":{},\"Availability\":\"active\",\"CapacityRange\":{\"LimitBytes\":5368709120,\"RequiredBytes\":0}},\"Driver\":\"scaleway-csi\",\"Name\":\"test-volume\"}"
Mar 06 15:12:56 web1 dockerd[1500481]: time="2024-03-06T15:12:56.374679425+01:00" level=debug msg="using cluster volume"