MountVolume.SetUp failed for volume “mongo” : hostPath type check failed: /mongo/data is not a directory

问题

I'm trying to configure a hostPath to launch Mongodb pod.

I have only one node of kubernetes v1.8.5 installed with rancher last stable version.

I have create folder /mongo/data and allow all permissions to all users.

I'm able to run docker image perfectly with docker without sudo:

docker run --name some-mongo -v /mongo/data:/data/db mongo:3.2.1

But when I launch to kubernetes:

sudo kubectl create -f mongodb.yml

I get MountVolume.SetUp failed for volume "mongo" : hostPath type check failed: /mongo/data is not a directory

This is the mongodb.yml:

apiVersion: v1
kind: Pod
metadata:
  name: test-pd
spec:
  containers:
  - image: mongo:3.2.1
    name: test-container
    volumeMounts:
    - mountPath: /data/db
      name: mongo
  volumes:
  - name: mongo
    hostPath:
      # directory location on host
      path: /mongo/data
      # this field is optional
      type: Directory

Any idea where I should looking for?

回答1:

Changing type: Directory to type: DirectoryOrCreate works for me.

回答2:

Removing type: Directory from the mongodb.yml works as expected

回答3:

If by any chance you are using minikube, then don't forget that minikube itself is a container. So hostPath points to a path in that container, not to a path on your host machine. You have to mount your PC path into the minikube container and then into the POD.

Example: minikube start --mount --mount-string="/host/path:/minikubeContainer/path"

回答4:

You are creating the docker container directly on the master node. As a result of this you could be able to run docker container with the newly created directory. But when you launch the kubernetes yaml file, it intends to run on a worker node. Since you create the directory on the master node, kubelet cannot find directory on worker node and failing. That's why "DirectoryorCreate" value on type flag is a kind of solution for this.

来源：https://stackoverflow.com/questions/48927312/mountvolume-setup-failed-for-volume-mongo-hostpath-type-check-failed-mongo

标签

Docker

Kubernetes

Rancher