How to mount volume for docker container via yaml manifest? - docker

Question

I try to launch container-vm machine with following yaml:
version: v1
kind: Pod
spec:
containers:
- name: simple-echo
image: gcr.io/google_containers/busybox
command: ['nc', '-p', '8080', '-l', '-l', '-e', 'echo', 'hello world!']
imagePullPolicy: Always
ports:
- containerPort: 8080
hostPort: 8080
protocol: TCP
volumeMounts:
- name: string
mountPath: /home
readOnly: false
restartPolicy: Always
dnsPolicy: Default
volumes:
- name: string
source:
# Either emptyDir for an empty directory
# emptyDir: {}
# Or hostDir for a pre-existing directory on the host
hostDir:
path: /home
I expect host home directory being accessible from the container.
However, container fails to start:
E0619 05:02:09.477574 2212 http.go:54] Failed to read URL: invalid pod:
[spec.volumes[0].source: invalid value '<*>(0xc2080b79e0){HostPath:<nil> EmptyDir:<nil> GCEPersistentDisk:<nil> AWSElasticBlockStore:<nil>
GitRepo:<nil> Secret:<nil> NFS:<nil> ISCSI:<nil> Glusterfs:<nil> PersistentVolumeClaimVolumeSource:<nil> RBD:<nil>}':
exactly 1 volume type is required spec.containers[0].volumeMounts[0].name: not found 'string']
What is the correct way to specify a volume for container?

Answer 1

Try replacing hostDir with hostPath as mentioned in v1beta3-conversion-tips-from-v1beta12.
Try replacing
volumes:
- name: string
source:
# Either emptyDir for an empty directory
# emptyDir: {}
# Or hostDir for a pre-existing directory on the host
hostDir:
path: /home
with
volumes:
- name: string
hostPath:
path: /home
at the bottom of your configuration.

Answer 2

There is a simple way to do it:
version: v1
kind: Pod
spec:
containers:
- name: simple-echo
image: gcr.io/google_containers/busybox
command: ['nc', '-p', '8080', '-l', '-l', '-e', 'echo', 'hello world!']
imagePullPolicy: Always
ports:
- containerPort: 8080
hostPort: 8080
protocol: TCP
volumeMounts:
- name: string
mountPath: /home
readOnly: false
restartPolicy: Always
dnsPolicy: Default
volumes:
- /path/dir/from/host:/name/of/dir/in/container