This topic describes the rationale behind specific
sudo privilege requirements for virtualizing Db2 Databases.
Targets and Staging
Delphix dynamically makes and removes directories under the provisioning directory during VDB operations. This privilege is optional, provided the provisioning directory permissions allow the delphix os user to make and remove directories.
Delphix dynamically mounts and unmounts directories under the provisioning directory during VDB operations. This privilege is required because
It is required to specify the NOPASSWD qualifier within the "sudo" configuration file, as shown here: Sudo File Configuration Examples for Db2 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.