Use configured docker daemon root dir on kubelet

cluster/plan.go

@@ -216,7 +216,7 @@ func (c *Cluster) BuildKubeletProcess(host *hosts.Host) v3.Process {
 		"/var/lib/cni:/var/lib/cni:z",
 		"/etc/resolv.conf:/etc/resolv.conf",
 		"/sys:/sys",
-		"/var/lib/docker:/var/lib/docker:rw,z",
+		host.DockerInfo.DockerRootDir + ":" + host.DockerInfo.DockerRootDir + ":rw,z",
 		"/var/lib/kubelet:/var/lib/kubelet:shared,z",
 		"/var/run:/var/run:rw",
 		"/run:/run",

hosts/hosts.go

@@ -4,7 +4,9 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
+
 	"github.com/docker/docker/client"
 	"github.com/rancher/rke/docker"
 	"github.com/rancher/rke/k8s"
@@ -29,6 +31,7 @@ type Host struct {
 	ToDelLabels         map[string]string
 	ToAddTaints         []string
 	ToDelTaints         []string
+	DockerInfo          types.Info
 }
 
 const (

hosts/tunnel.go

@@ -60,6 +60,7 @@ func checkDockerVersion(ctx context.Context, h *Host) error {
 		return fmt.Errorf("Can't retrieve Docker Info: %v", err)
 	}
 	logrus.Debugf("Docker Info found: %#v", info)
+	h.DockerInfo = info
 	isvalid, err := docker.IsSupportedDockerVersion(info, K8sVersion)
 	if err != nil {
 		return fmt.Errorf("Error while determining supported Docker version [%s]: %v", info.ServerVersion, err)