fix: error in Kubelet when using default root directory

README.md

@@ -91,7 +91,7 @@ Or you can start nydus-snapshotter manually.
 # Otherwise, provide them in below command line.
 # `address` is the domain socket that you configured in containerd configuration file
 # `--nydusd-config` is the path to `nydusd` configuration file
-# The default nydus-snapshotter work directory is located at `/var/lib/containerd-nydus`
+# The default nydus-snapshotter work directory is located at `/var/lib/containerd/io.containerd.snapshotter.v1.nydus`
 
 $ sudo ./containerd-nydus-grpc --config /etc/nydus/config.toml --nydusd-config /etc/nydus/nydusd-config.json --log-to-stdout
 ```

config/config_test.go

@@ -24,7 +24,7 @@ func TestLoadSnapshotterTOMLConfig(t *testing.T) {
 
 	exampleConfig := SnapshotterConfig{
 		Version:    1,
-		Root:       "/var/lib/containerd-nydus",
+		Root:       "/var/lib/containerd/io.containerd.snapshotter.v1.nydus",
 		Address:    "/run/containerd-nydus/containerd-nydus-grpc.sock",
 		DaemonMode: "dedicated",
 		Experimental: Experimental{

integration/entrypoint.sh

@@ -13,7 +13,7 @@ SNAPSHOTTER_CONFIG=/etc/nydus/config.toml
 CONTAINERD_ROOT=/var/lib/containerd/
 CONTAINERD_STATUS=/run/containerd/
 REMOTE_SNAPSHOTTER_SOCKET=/run/containerd-nydus/containerd-nydus-grpc.sock
-REMOTE_SNAPSHOTTER_ROOT=/var/lib/containerd-nydus
+REMOTE_SNAPSHOTTER_ROOT=/var/lib/containerd/io.containerd.snapshotter.v1.nydus
 CONTAINERD_SOCKET=/run/containerd/containerd.sock
 SNAPSHOTTER_SHARED_MNT=${REMOTE_SNAPSHOTTER_ROOT}/mnt
 SNAPSHOTTER_CACHE_DIR=${REMOTE_SNAPSHOTTER_ROOT}/cache

internal/constant/values.go

@@ -41,7 +41,7 @@ const (
 	NydusdBinaryName             string = "nydusd"
 	NydusImageBinaryName         string = "nydus-image"
 
-	DefaultRootDir                 = "/var/lib/containerd-nydus"
+	DefaultRootDir                 = "/var/lib/containerd/io.containerd.snapshotter.v1.nydus"
 	DefaultAddress                 = "/run/containerd-nydus/containerd-nydus-grpc.sock"
 	DefaultSystemControllerAddress = "/run/containerd-nydus/system.sock"
 

misc/snapshotter/Dockerfile

@@ -29,7 +29,7 @@ ARG SCRIPT_DESTINATION=${DESTINATION}/opt/nydus
 WORKDIR /root/
 RUN apk add --no-cache libc6-compat bash
 
-VOLUME /var/lib/containerd-nydus /run/containerd-nydus
+VOLUME /var/lib/containerd/io.containerd.snapshotter.v1.nydus /run/containerd-nydus
 
 COPY --from=sourcer /.nydus_version /.nydus_version
 COPY --from=kubectl-sourcer /usr/bin/kubectl /usr/bin/kubectl

misc/snapshotter/base/nydus-snapshotter.yaml

@@ -87,7 +87,7 @@ spec:
         - name: config-volume
           mountPath: "/etc/nydus-snapshotter"
         - name: nydus-lib
-          mountPath: "/var/lib/containerd-nydus"
+          mountPath: "/var/lib/containerd/io.containerd.snapshotter.v1.nydus"
           mountPropagation: Bidirectional
         - name: nydus-run
           mountPath: "/run/containerd-nydus"
@@ -118,7 +118,7 @@ spec:
           type: DirectoryOrCreate
       - name: nydus-lib
         hostPath:
-          path: /var/lib/containerd-nydus
+          path: /var/lib/containerd/io.containerd.snapshotter.v1.nydus
           type: DirectoryOrCreate
       - name: nydus-opt
         hostPath:

misc/snapshotter/config-blockdev.toml

@@ -1,6 +1,6 @@
 version = 1
 # Snapshotter's own home directory where it stores and creates necessary resources
-root = "/var/lib/containerd-nydus"
+root = "/var/lib/containerd/io.containerd.snapshotter.v1.nydus"
 # The snapshotter's GRPC server socket, containerd will connect to plugin on this socket
 address = "/run/containerd-nydus/containerd-nydus-grpc.sock"
 # No nydusd daemon needed

misc/snapshotter/config-proxy.toml

@@ -1,6 +1,6 @@
 version = 1
 # Snapshotter's own home directory where it stores and creates necessary resources
-root = "/var/lib/containerd-nydus"
+root = "/var/lib/containerd/io.containerd.snapshotter.v1.nydus"
 # The snapshotter's GRPC server socket, containerd will connect to plugin on this socket
 address = "/run/containerd-nydus/containerd-nydus-grpc.sock"
 # No nydusd daemon needed

misc/snapshotter/config.toml

@@ -1,6 +1,6 @@
 version = 1
 # Snapshotter's own home directory where it stores and creates necessary resources
-root = "/var/lib/containerd-nydus"
+root = "/var/lib/containerd/io.containerd.snapshotter.v1.nydus"
 # The snapshotter's GRPC server socket, containerd will connect to plugin on this socket
 address = "/run/containerd-nydus/containerd-nydus-grpc.sock"
 # The nydus daemon mode can be one of the following options: multiple, dedicated, shared, or none. 

misc/snapshotter/nydusd-config-localfs.json

@@ -3,7 +3,7 @@
     "backend": {
       "type": "localfs",
       "config": {
-        "dir": "/var/lib/containerd-nydus/cache/"
+        "dir": "/var/lib/containerd/io.containerd.snapshotter.v1.nydus/cache/"
       }
     },
     "cache": {

misc/snapshotter/snapshotter.sh

@@ -20,7 +20,7 @@ SNAPSHOTTER_GRPC_SOCKET="${SNAPSHOTTER_GRPC_SOCKET:-/run/containerd-nydus/contai
 
 # The directory about nydus and nydus snapshotter
 NYDUS_CONFIG_DIR="${NYDUS_CONFIG_DIR:-/etc/nydus}"
-NYDUS_LIB_DIR="${NYDUS_LIB_DIR:-/var/lib/containerd-nydus}"
+NYDUS_LIB_DIR="${NYDUS_LIB_DIR:-/var/lib/containerd/io.containerd.snapshotter.v1.nydus}"
 NYDUS_BINARY_DIR="${NYDUS_BINARY_DIR:-/usr/local/bin}"
 SNAPSHOTTER_SCRYPT_DIR="${SNAPSHOTTER_SCRYPT_DIR:-/opt/nydus}"
 

tests/e2e/k8s/snapshotter-cri.yaml

@@ -98,7 +98,7 @@ spec:
         - name: config-volume
           mountPath: "/etc/nydus-snapshotter"
         - name: nydus-lib
-          mountPath: "/var/lib/containerd-nydus"
+          mountPath: "/var/lib/containerd/io.containerd.snapshotter.v1.nydus"
           mountPropagation: Bidirectional
         - name: nydus-run
           mountPath: "/run/containerd-nydus"
@@ -131,7 +131,7 @@ spec:
         type: DirectoryOrCreate
     - name: nydus-lib
       hostPath:
-        path: /var/lib/containerd-nydus
+        path: /var/lib/containerd/io.containerd.snapshotter.v1.nydus
         type: DirectoryOrCreate
     - name: nydus-etc
       hostPath:

tests/e2e/k8s/snapshotter-kubeconf.yaml

@@ -107,7 +107,7 @@ spec:
         - name: config-volume
           mountPath: "/etc/nydus-snapshotter"
         - name: nydus-lib
-          mountPath: "/var/lib/containerd-nydus"
+          mountPath: "/var/lib/containerd/io.containerd.snapshotter.v1.nydus"
           mountPropagation: Bidirectional
         - name: nydus-run
           mountPath: "/run/containerd-nydus"
@@ -140,7 +140,7 @@ spec:
         type: DirectoryOrCreate
     - name: nydus-lib
       hostPath:
-        path: /var/lib/containerd-nydus
+        path: /var/lib/containerd/io.containerd.snapshotter.v1.nydus
         type: DirectoryOrCreate
     - name: nydus-etc
       hostPath: