Solution To remove all locks you must perform an emergency HA reset Discussion

Solution to remove all locks you must perform an

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Solution To remove all locks, you must perform an emergency HA reset. Discussion If a partial host failure occurs while the HA daemon on the host was accessing the state file on shared storage, it may be necessary to temporarily disable HA. This can be done using the following command: # xe host-emergency-ha-disable --force If the host was a pool master, then it should automatically recover, and member servers should automatically reconnect. If a member server does not automatically reconnect, it may be necessary to reset the pool master address. This can be done using the following command on the impacted member server: Reset pool master address on member server # xe pool-emergency-reset-master master-address={pool_master_address} 120 | Chapter 13: Hardware Maintenance
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Index A Active Directory, 102 - 103 , 105 active-backup bonds, 59 administrative tools, 10 - 11 , 40 AMD Extended Migration, 37 (see also live migration) Apache CloudStack, 40 audit.log file, 11 authentication (see security) B backup strategies, 93 - 99 dom0 backup and restore, 94 frequency of backups, 93 Guest VM backup and restore, 95 - 97 metadata backup and restore, 97 - 98 portable SRs for, 99 - 99 USB storage for, 116 XAPI database backup and restore, 95 balance-slb bonds, 60 BIOS updates, 42 bond object, 25 bonding (see NIC bonding) boot from SAN, 32 , 71 - 72 bootable USB device, 68 - 69 bootloader, 15 - 16 boot_time_cpus file, 18 bridge network, 20 bugtool, 19 C capacity planning during failure, 52 CentOS dom0 using, 7 , 9 version 7, systemd model for, 20 CLI (command-line interface), 10 CNA (converged network adapter), 57 code examples, permission to use, x configuration files, 14 - 23 , 29 - 33 (see also deployment design) boot_time_cpus, 18 bugtool directory of, 19 db.conf, 19 extlinux.conf, 15 - 16 hostname, 16 hosts, 16 initiatorname.iscsi, 18 installed-repos directory of, 19 logrotate.conf, 83 , 86 master.d directory of, 19 modifying, 9 , 15 , 17 , 21 multipath.conf, 17 network.conf, 20 ntp.conf, 22 patch directories of, 23 pool.conf, 21 ptoken, 21 resolv.conf, 17 scripts directory of, 21 syslog.conf, 84 , 91 validation of, 14 - 15 xapi-ssl.conf, 22 xapi-ssl.pem, 22 xhad.conf, 12 consoles, monitoring, 14 contact information for this book, xi control domain (see dom0) conventions used in this book, ix 121
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converged network adapter (CNA), 57 core processes, 12 - 14 (see also specific processes) CPUs compatibility within pools, 37 - 38 information about, 18 masking, 37 - 39 D daemon.log file, 13 , 14 database, XAPI, 19 , 22 , 95 db.conf file, 19 DDK (Device Driver Kit), 32 - 33 driver disks, 32 - 33 , 73 - 76 driver updates, 42 , 75 deployment design, 35 - 62 administrative tools, 40 hardware compatibility (see HCL) I/O operations per second, 46 - 47 infrastructure failure planning, 50 - 53 memory management, 47 - 50 network topologies, 58 - 62 pooled versus standalone hosts, 35 - 39 storage, 42 - 46 , 55 - 58 DM-MP (device mapper multipathing), 17 DNS entries, 17 Docker Supplemental Pack, 32 dom0 (control domain), 7 - 9 backup and restore, 94 memory for, 48 domU (see Guest VMs) driver disks, 32 - 33 , 73 - 76 driver updates, 42 , 75 dual-booting, 29 Dundee version bootable USB device, 69 bootloader, 16 installation options, 30 patch management, 80 PBIS, 101 systemd initialization model, 20 thin provisioned block storage, 45 , 56 UEFI-capable hardware support, 41
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