Adding cephfs kernel module to minikube iso

[kokhang]

Fix #1668

[minikube-bot]

Can one of the admins verify this patch?

[dlorenc]

@minikube-bot ok to test

[codecov-io]

Codecov Report

Merging #1669 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1669   +/-   ##
=======================================
  Coverage   38.68%   38.68%           
=======================================
  Files          51       51           
  Lines        2670     2670           
=======================================
  Hits         1033     1033           
  Misses       1456     1456           
  Partials      181      181

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[dlorenc]

You should be able to sanity test your built iso (to make sure ceph works) at this URL: http://storage.googleapis.com/minikube-builds/1669/minikube.iso

I'm running a few tests on it now.

[dlorenc]

$ cat /proc/config.gz | gunzip | grep CEPH
CONFIG_CEPH_LIB=y
# CONFIG_CEPH_LIB_PRETTYDEBUG is not set
# CONFIG_CEPH_LIB_USE_DNS_RESOLVER is not set
CONFIG_CEPH_FS=m
CONFIG_CEPH_FS_POSIX_ACL=y

[dlorenc]

@kokhang can you ack that the ceph stuff you need works in this ISO? I'll merge after that and then push out a new build.

[kokhang]

@dlorenc It works. The module does get included.
$ find /lib/modules/$(uname -r)/kernel/fs -type f -name '*.ko' | grep -E 'ceph' /lib/modules/4.9.13/kernel/fs/ceph/ceph.ko

Also my test script worked. I was able to mount a ceph FS with this minikube ISO.
Thank you!