bugfix-222 Driver should check socket parent directory before trying …

[zhucan]

What type of PR is this?
/kind bug

What this PR does / why we need it:
if the socket parent directory does not exit, the driver does not check it and just tries to call Listen to the address. So the error message returned from Listen call does not give the clear reason why it fail. It would be better to check whether the parent directory exist or not before listening to the socket address.

Which issue(s) this PR fixes:

Fixes #222

Special notes for your reviewer:
@jingxu97
@davidz627

Does this PR introduce a user-facing change?:

Driver should check socket parent directory before trying to bind it

[k8s-ci-robot]

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[zhucan]

/retest

[msau42]

/assign @davidz627
/ok-to-test

[davidz627]

thanks for picking this up @zhucan! Just some minor comments, feel free to chat on slack (i'm davidz627) if you have any questions

[zhucan]

thanks for picking this up @zhucan! Just some minor comments, feel free to chat on slack (i'm davidz627) if you have any questions

copy that, thanks

[zhucan]

/retest

[zhucan]

/retest

[davidz627]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: davidz627, zhucan

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[davidz627]

Thanks @zhucan!