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Network Shares in Linux doesn't show files intermittently

Original Question or Issue:

 Network Share doesn't show files intermittently

Environment:

  • Product - FileCloud Server
  • Version - 
  • Platform - Linux

Steps to Reproduce:

 

Error or Log Message:

 cifs.upcall[791288]: check_service_ticket_exists: unable to get client principal from cache: No credentials cache found (filename: /tmp/krb5cc_0) 
 cifs.upcall[791288]: main: valid TGT is not present in credential cache 
 cifs.upcall[791288]: Exit status 1 
 kernel: CIFS: VFS: Verify user has a krb5 ticket and keyutils is installed 

Defect or Enhancement Number:

 

Cause:

In Linux environments, using Kerberos authentication to mount Network Shares can cause issues with Apache from accessing the Kerberos cache.

Resolution or Workaround:

Remove the sec=krb5 reference from CIFS mount parameters in /etc/fstab

If the current config is as follows:

//fs01/share /mount/path cifs credentials=/root/.smbcredentials,uid=33,gid=33,rw,nounix,iocharset=utf8,file_mode=0777,dir_mode=0777,sec=krb5,noserverino 0 0

Change it to:

//fs01/share /mount/path cifs credentials=/root/.smbcredentials,uid=33,gid=33,rw,nounix,iocharset=utf8,file_mode=0777,dir_mode=0777,noserverino 0 0

Remount the shares and restart Apache after this change. 

Alternatively, customer can configure Kerberos authentication with KeyFab, etc., to make sure Apache can access the shares without any issues. 

Notes: