Cause: Unable to mount directory error while creating the VDB

while provisioning a new VDB for source database, we are receiving the error Unable to mount directory.

We have performed all the hostchecker checks on target machine and all the tests are success, and still we are receiving error while creating a VDB.

Prem Reddy

170 Points

Posted 3 years ago

3 years ago

Sandro Latini, Employee

350 Points

Hi Prem,

Have you checked that the Delphix user in your target machine has the right sudo permissions to mount and unmount (I assume it's a Linux host)?

Regards
Sandro

Comment

3 years ago

Prem Reddy

170 Points

Hi,

Yes it's Linux system ( the target machine is a exadata x2-2 machine, and we have verified all the hostchecker checks for target was successful.

here is the check which shows the mount/umount privileges to delphios user

/home/delphios$ sudo -l
Matching Defaults entries for delphios on this host:
requiretty, env_reset, env_keep="COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR LS_COLORS MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE LC_COLLATE LC_IDENTIFICATION
LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE LC_TIME LC_ALL LANGUAGE LINGUAS _XKB_CHARSET XAUTHORITY", !requiretty

Runas and Command-specific defaults for delphios:

User delphios may run the following commands on this host:
(root) NOPASSWD: /bin/mount, (root) /bin/umount, (root) /bin/mkdir, (root) /bin/rmdir, (root) /bin/ps, (root) /bin/pargs

Regards

Prem

Comment

3 years ago

Adam Bowen, Official Rep

17,418 Points

Can you test on the system you are attempting to provision to that the delphix user can mkdir /the/path/to/that/directory or sudo mkdir /the/path/to/that/directory

Comment

3 years ago

Prem Reddy

170 Points

Hi,

I am able to create the directory with the delphios user in the mount point,

/u01/delphix_mount$ mkdir testvdb

/u01/delphix_mount$ ls -ltr

drwxr-xr-x 2 delphios dba 4096 Aug 14 04:04 testvdb

Regards

Prem

Comment

3 years ago

Adam Bowen, Official Rep

17,418 Points

Can you post the text of the whole error please? Also a high-res screen shot would be helpful.

Comment

3 years ago

Prem Reddy

170 Points

Image https//d2r1vs3d9006apcloudfrontnet/s3_images/1257316/RackMultipart20150814-31198-3iptyr-mount-error_inlinePNG1439556625

Comment

3 years ago

Prem Reddy

170 Points

Hi,

I am able to mount the filesystem from remote server to target, but it is not working with delphix engine... seems some configuration issue at delphix engine, need to mount/or give the permission to the target machine-- or target ip should be added in somewhere in t delphix engine side.

regards

Prem

Comment

2015-08-14T13:04:23+00:00

Adam Bowen, Official Rep

17,418 Points

What information is given if you click that i with the circle around it?

2015-08-14T13:04:47+00:00

Adam Bowen, Official Rep

17,418 Points

Can you attach the error log?

Help
Support Logs
Download
Extract the tgz
log->mgmt_log->error.log

3 years ago

Neal Stack, Official Rep

2,592 Points

Hello,

Are you able to mount the the "public" share on the Delphix engine? Delphix has a very small shared directory for testing purposes:

$ mkdir /tmp/test

$ sudo mount -F nfs -o rw,fg,hard,rsize=1048576,wsize=1048576,vers=3,nointr,timeo=600,proto=tcp,sec=sys nstack-4210.acme.com:/public /tmp/test

$ sudo umount /tmp/test

Does the host have multiple IP addresses? If the mount request comes from a different IP than the one that was specified when the environment was added, Delphix will reject it. Delphix blocks attempts to mount the shares from IP addresses other than the one that was specified in the environment.

There is a configuration parameter that Delphix technical support can change to turn off this layer of security if needed.

Thanks,
Neal

Comment

1 person likes this

2015-08-14T13:14:35+00:00

Adam Bowen, Official Rep

17,418 Points

Good thinking on the second part, Neal.

3 years ago

Prem Reddy

170 Points

Hi,

This is an exadata (X2-2 half rack) engineered system, and it is having multiple ip addresses. We are trying to create VDB's on multiple hosts it is failing on all the nodes.

How to know what ip address was added to the Delphix engine when it configured.

and How to change the configuration parameter settings to allow shares to mount?

Regards

Prem