Apps DBA Workshop

 Exadata KVM virtual machines not starting   We have a customer where all KVM machines were not starting.  The machines is encountering the following error during startup:   [root@dbnode1 ~]# virsh start dbnode1 error: Failed to start domain dbnode1 error: internal error: process exited while connecting to monitor: 2024-04-27Tqemu-system-x86_64: -blockdev {"driver":"file","filename":"/EXAVMIMAGES/GuestImages/hostname.com/System.img","node-name":"libvirt-9-storage","cache":{"direct":false,"no-flush":false},"auto-read-only":true,"discard":"unmap"}: Could not open '/EXAVMIMAGES/GuestImages/hostname.com/System.img': Permission denied   Cause: Due to the installation of some third-party security components libvirtd package and its libraries were not functioning properly.   Solution: Rsinstall the libvirtd package Update file:  /etc/libvirt/q

KVM Virtual machine errored with following Error. Issue: When we were trying to install the guest packages then the VM hosted with OEL9 KVM crashed with the following Error.   Wed Apr 17 16:03:45 GMT 2024 [ 5.310837] x86/mm: Checked W+X mappings:passed, no W+X pages found. Wed Apr 17 16:03:45 GMT 2024 [ 5.312259] Run /init as init process Wed Apr 17 16:03:45 GMT 2024 Fatal glibc error: CPU does not supportx86-64-v2 Wed Apr 17 16:03:45 GMT 2024 [ 5.314075] Kernel panic - not syncing:Attempted to kill init! exitcode=0x00007f00 Wed Apr 17 16:03:45 GMT 2024 [ 5.315686] CPU: 1 PID: 1 Comm: init Not tainted5.14.0-70.5.1.el9_0.x86_64 #1 Wed Apr 17 16:03:45 GMT 2024 [ 5.317214] Hardware name: QEMU Standard PC (Q35+ ICH9, 2009)   Cause: The installed glibc version of the operating system doesn’t set the CPU flags correctly in  the VM configuration.   Solution: As a workaround use the following commands:   #virsh edit vm-name   Then, add the following declaration in

 Oracle KVM Service fails to start with following error: #virsh start db-node1 error: Failed to start domain 'db-node1' error: internal error: QEMU unexpectedly closed the monitor (vm='db-node1'): 2024-04-08Tqemu-kvm: unable to map backing store for guest RAM: Cannot allocate memory   This issue is happening due to the wrong version of the packages:   # rpm -qa | grep qemu qemu-img-8.0.0-16.el9_3.1.x86_64 libvirt-daemon-driver-qemu-9.5.0-7.0.1.el9_3.x86_64 qemu-kvm-tools-8.0.0-16.el9_3.1.x86_64 qemu-pr-helper-8.0.0-16.el9_3.1.x86_64 qemu-kvm-docs-8.0.0-16.el9_3.1.x86_64 ipxe-roms-qemu-20200823-9.git4bd064de.el9_0.noarch qemu-kvm-common-8.0.0-16.el9_3.1.x86_64 qemu-kvm-device-display-virtio-gpu-8.0.0-16.el9_3.1.x86_64 qemu-kvm-ui-opengl-8.0.0-16.el9_3.1.x86_64 qemu-kvm-ui-egl-headless-8.0.0-16.el9_3.1.x86_64 qemu-kvm-device-display-virtio-gpu-pci-8.0.0-16.el9_3.1.x86_64 qemu-kvm-block-blkio-8.0.0-16.el9_3.1.x86_64 qemu-kvm-block-rbd-8.0.0-16.el9_3.1.x86_64 qemu-kvm-devic

 One of the oracle linux service is encountering error saying cannot file directory of the RPM packages. # systemctl status snmpd ● snmpd.service - Simple Network Management Protocol (SNMP) Daemon.      Loaded: loaded (/usr/lib/systemd/system/snmpd.service; disabled; vendor preset: disabled)      Active: active (running) since  2024-03-13 16:24:10 <Tz>; 4s ago    Main PID: 6061 (snmpd)       Tasks: 1 (limit: 10913)      Memory: 11.1M         CPU: 61ms      CGroup: /system.slice/snmpd.service              └─6061 /usr/sbin/snmpd -LS0-6d -f   Mar 13 16:11:25 <hostname> systemd[1]: Starting Simple Network Management Protocol (SNMP) Daemon.... Mar 13 16:11:25 <hostname> snmpd[6061]: Can't find directory of RPM packages Mar 13 16:11:25  <hostname> snmpd[6061]: NET-SNMP version 5.9.1 Mar 13 16:11:25  <hostname> systemd[1]: Started Simple Network Management Protocol (SNMP) Daemon..   OEL 9, the RPM database switched from  Berkel

    During PROD backup getting error “Based on the error: java.sql.SQLException: Non supported character set (add orai18n.jar in your classpath): AR8MSWIN1256” copy orai18n.jar file to Valid ORACLE_HOME [oracle@oraerpdb01n ~]$ cd $ORACLE_HOME [oracle@oraerpdb01n 19.0.0]$ find . -name orai8* [oracle@oraerpdb01n 19.0.0]$ find . -name orai18* ./oui/jlib/orai18n-collation.jar ./oui/jlib/orai18n-mapping.jar ./jlib/orai18n-tools.jar ./jlib/orai18n-translation.jar ./jlib/orai18n-collation.jar ./jlib/orai18n.jar ./jlib/orai18n-net.jar ./jlib/orai18n-mapping.jar ./jlib/orai18n-servlet.jar ./jlib/orai18n-lcsd.jar ./jlib/orai18n-utility.jar ./appsutil_xx/jre/lib/ext/orai18n.jar ./appsutil_xx/clone/jlib/oui/jlib/orai18n-collation.jar ./appsutil_xx/clone/jlib/oui/jlib/orai18n-mapping.jar ./appsutil_xx/clone/jlib/oui/orai18n-collation.jar ./appsutil_xx/clone/jlib/oui/orai18n-mapping.jar ./appsutil_xx/clone/jre/lib/ext/orai18n.jar ./appsutil/jre/lib/ext/orai18n.jar ./appsutil/clo

We were trying to install the ovirt engine and Oracle Linux 9 but we were not able to complete the installation successfully.  We should note that Oracle Linux 9 is not currently supported for the installation of KVM hosts and OLVM engine. The latest release of OLVM is OLVM 4.5, and it only supports Oracle Linux 8.8 or later versions.  Conclusion: So we recommend you to use last available version of Oracle Linux 8 for installation of oVirt engine 4.4.10/oVirt engine 4.5 and KVM Host on Server to avoid any issue. thanks for reading. regards, ZAHEER