/mnt/[directory] re-export problem using derdanne puppet module

[roscokhan]

Hi,

I thought I'd share a solution I found to a duplicate declaration error I experienced when re-exporting some filesystems using derdanne-nfs.

I have an NFS server that I'm using as an aggregation point to mount NFS filesystems from various locations and re-export them to client devices as a single, consolidated mount. This is due to client restrictions (some clients don't handle a mix of ro and rw mounts correctly).

This combination of client and server configurations results in the error (anonymised to protect the innocent):

nfs::client::mount { '/mnt/media/Resources/Presentations':

  server => '192.168.220.65',
  share => '/Users/bob/Resources/Presentations',
  ensure => 'mounted',
  options_nfs => 'ro',

}

nfs::server::export { '/mnt/media/Resources/Presentations':

  bind  => 'rbind',
  clients => '192.168.230.0/24(ro,all_squash,insecure,crossmnt,fsid=100,no_subtree_check)',

}

The error I see:

Error: Could not retrieve catalog from remote server:
Error 500 on SERVER:
Server Error:
Evaluation Error:
Error while evaluating a Resource Statement
Evaluation Error:
Error while evaluating a Resource Statement, Duplicate declaration:

              Nfs::Client::Mount[/mnt/media/Resources/Presentations] is already declared at (file: /etc/puppetlabs/code/environments/production/manifests/node_192-168-230-192_media.bob.com.pp, line: 183);

              cannot redeclare (file: /etc/puppetlabs/code/environments/production/modules/nfs/manifests/server/export.pp, line: 164)

              (file: /etc/puppetlabs/code/environments/production/modules/nfs/manifests/server/export.pp, line: 164, column: 7)

              (file: /etc/puppetlabs/code/environments/production/manifests/node_192-168-230-192_media.bob.com.pp, line: 239) on node media.bob.com

---

This combination of configurations works as expected:

nfs::client::mount { 'MOUNT_/mnt/media/Resources/Presentations':

  server => '192.168.220.65',
  share => '/Users/bob/Resources/Presentations',
  mount => '/mnt/media/Resources/Presentations',
  ensure => 'mounted',
  options_nfs => 'ro',

}

nfs::server::export { '/mnt/media/Resources/Presentations':

  bind  => 'rbind',
  clients => '192.168.230.0/24(ro,all_squash,insecure,crossmnt,fsid=100,no_subtree_check)',

}

I used the string 'MOUNT_' to avoid the naming clash, although I think this could be almost anything, as long as the mount option is specified.

Regards,

Ross

[derdanne]

Thanks for sharing!

[roscokhan]

Hi Daniel, No worries - I guess this is a “corner case”. On further consideration, it seems that the module uses a single “name space” shared between both the client and server portions, which detects and prevents redeclaration. I was wondering whether separate “name spaces” might also avoid redeclarations. Many thanks, Ross

…

Sent from my iPhone On 21 Mar 2021, at 07:34, Daniel Klockenkämper ***@***.***> wrote:  Thanks for sharing! — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#129 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AHC7RXYJILKAHEONBI6O2QLTEUBGXANCNFSM4ZQZED5Q>.