A blog for all the virtualization and operating system troubleshooting

  Error: ORA-00245: control file backup failed; in Oracle RAC, target might not be on shared storage Solution: Enable shared control file: 1.      Configure the snapshot controlfile to a shared disk like (ACFS/NFS/DNFS): RMAN> CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/SHARED_Folder/snapcf_KRISHNA.f'; 2.      In case of ASM use RMAN> CONFIGURE SNAPSHOT CONTROLFILE NAME TO '+ASM_DATA/snapcf_CNTRL.f';

 Error: PostgreSQL: FATAL: XX000: could not write init file when accessing VEEAM console Solution: Check the free space on the windows machine where VEEAM installed Increase space on the drive

 1)Enable archive log SQL> Conn sys/<pass>@TargetDB as sysdba; SQL> Shut immediate; SQL> Startup mount; SQL> alter database archivelog; SQL> alter database open; SQL> archive log list; 2)Create RECO database and create user: SQL> Conn sys/<pass>@RECODB as sysdba; SQL> CREATE USER rman IDENTIFIED BY cat TEMPORARY TABLESPACE temp DEFAULT TABLESPACE users QUOTA UNLIMITED ON users;  2    3    4 User created. SQL> GRANT RECOVERY_CATALOG_OWNER TO rman; Grant succeeded. SQL> grant select on v_$instance to rman; Grant succeeded. SQL> 3)Create Recovery Catalog C:\Users\Administrator>rman catalog rman/cat@RECODB RMAN>  create catalog; recovery catalog created RMAN> connect target sys/dba@ORCL connected to target database: ORCL (DBID=1702363306) 3)Register Recovery Catalog to database RMAN> register database; database registered in recovery catalog starting full resync of recovery catalog full resync comple...

    Once you attach an OS ISO and start the windows installation and when you reach the hard disk selection time you will see no disks listed. To proceed further do below steps: 1.Download windows disk drivers from:     https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/virtio-win-0.1.248-1/     downlaod .iso file 2.Upload the image to Storage domain of the ovirt 3.When you are in the driver page:    from Virtual machine -> select 3 dots on the top -> choose "Change CD" ->select the ovrt driver iso (that we uploaded now)  from the console Browse the option :    and driver from vistore:Win10->Amd64 folder: 4.Now rescan and you will see disk listed 5.Go back to the "change CD" change to OS and now in console you will see "Next" option enabled

  To open virtual machine console from ovirt manager (KVM) 1. Download and Install ovirt-viewer from the below link:     https://virt-manager.org/download 2.From browser open ovirt engine and login to administrator portal 3.Right click the virtual machine and choose "Console" 4.Console file be getting created on your windows->downloads 5.Right click the file ->Properties and change the file "Opens With:" as a new program and browse till c:\program files->ovirt-viewer-> "Remote-Viewer" type 5.Now double click on the "Console.vv" file will open the console:

  In Host1: # ssh-keygen -t rsa #ssh-copy-id root@<Host2> Thats all: Now from Host1 try login with below command and it wont ask password.  # ssh root@Host2 

 Steps: Login to OEL7 with ssh and run below commands yum install https://yum.oracle.com/repo/OracleLinux/OL7/ovirt42/x86_64/ovirt-release42.rpm yum install ovirt-engine Make sure host name is DNS resolvable FQDN run "engine-setup" and provide all the 15 answers if any failure check the log and re-run with existing answer file using:              engine-setup --config-append /var/lib/ovirt-engine/setup/answers/20240710113710-setup.conf    Login to the ovirt-engine using:               http://<FQDN>:80/ovirt-engine               https://<FQDN>:443/ovirt-engine

  Error: Once we install the ovirt-Engine on Linux and when try to access: https://<IP>/ovirt-engine getting error:   The redirection URI for client is not registered. Solution: 1. Create a new configuration file: /etc/ovirt-engine/engine.conf.d/99-sso.conf and include the following: SSO_CALLBACK_PREFIX_CHECK=false 2. Restart the oVirt Engine service: systemctl restart ovirt-engine Note: This action will disable the additional security check for the callback prefix.