This topic describes the rationale behind specific sudo privilege requirements for virtualizing Oracle Databases.
Privilege | Sources | Targets | Rationale |
|---|---|---|---|
ps | pargs | Optional, Strongly Recommended | Optional, Strongly Recommended | Delphix auto-discovery uses the This privilege is required for Auto-Discovery with non-default |
mount/umount | Not Required | Required | The Delphix Engine dynamically mounts and unmounts directories under the provisioning directory during VDB operations. This privilege is required because mount and umount are typically reserved for superuser. |
nfso (AIX only) | Not Required | Required | The Delphix Engine monitors NFS read and write sizes on an AIX target host. It uses the nfso command to query the sizes in order to optimize NFS performance for VDBs running on the target host. Only a superuser can issue the nfso command. |
It is required to specify the NOPASSWD qualifier within the "sudo" configuration file, as shown here: Sudo File Configuration Examples for Oracle Environments. This ensures that the "sudo" command does not demand the entry of a password, even for the "display permissions" (i.e. "sudo -l") command.
Delphix issues "sudo -l" in some scripts to detect if the operating system user has the correct sudo privileges. If it is unable to execute this command, some actions may fail and Delphix will raise an alert suggesting it does not have the correct sudo permissions. Restricting the execution of "sudo -l" by setting “listpw=always” in the “/etc/sudoers” file when the Delphix operating system user is configured to use public key authentication will cause the Delphix operating system user to be prompted for a password which will fail certain Delphix actions. Use a less restrictive setting for listpw than "always" when the Delphix operating system user is using public-key authentication.
Oracle Mount options for RAC | |
|---|---|
| AIX | cio,rw,bg,hard,nointr,timeo=600,proto=tcp,nosuid,noac |
| HPUX | rw,bg,hard,rsize=1048576,wsize=1048576,nointr,timeo=600,proto=tcp,nosuid,forcedirectio,noac |
| Solaris | rrw,bg,hard,rsize=1048576,wsize=1048576,nointr,proto=tcp,nosuid,forcedirectio,noac |
For the above platforms, depending on NFS version used, additional options vers=3 or vers=4.x is added (x varies depending on what that platform supports. e.g. vers=4 or vers=4.1) | |
| Linux (NFSv3) | -t nfs rw,bg,hard,rsize=1048576,wsize=1048576,nointr,timeo=600,tcp,nosuid,sec=sys,vers=3,actimeo=0 |
| Linux (NFSv4) | -t nfs4 rw,bg,hard,rsize=1048576,wsize=1048576,nointr,timeo=600,tcp,nosuid,sec=sys,actimeo=0 |
2. For AIX, rsize=<value>,wsize=<value> options are added depending on the value returned by "/usr/sbin/nfso -o nfs_max_read_size" and "/usr/sbin/nfso -o nfs_max_write_size" commands.
| Oracle unmount options | "-f" is used for all platforms. For Linux, "-lf" is used. |
Oracle Mount options for Single Instance | |
AIX | cio,rw,bg,hard,intr,timeo=600,proto=tcp,nosuid |
HPUX | rw,bg,hard,rsize=1048576,wsize=1048576,nointr,timeo=600,proto=tcp,nosuid,forcedirectio |
Solaris | rw,bg,hard,rsize=1048576,wsize=1048576,nointr,proto=tcp,nosuid,forcedirectio |
For the above platforms, depending on NFS version used, additional options vers=3 or vers=4.x is added (x varies depending on what that platform supports. e.g. vers=4 or vers=4.1) | |
Linux (NFSv3) | -t nfs rw,bg,hard,rsize=1048576,wsize=1048576,nointr,timeo=600,tcp,nosuid,sec=sys,vers=3 |
Linux (NFSv4) | -t nfs4 rw,bg,hard,rsize=1048576,wsize=1048576,nointr,timeo=600,tcp,nosuid,sec=sys |