Ovirt

Ovirt Bad volume specification after update

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I try to maintain my systems updated, It generates problems but unmaintained machines have the incredible ability to create bigger problems. At Calidade Systems for internal infrastructure we choose Ovirt, It’s really easy to add hardware, storage and every month has new improvements, obviously it not a perfect solution, but the perfect virtualization environment does […]

Proxmox

Moving a Virtual Machine from VirtualBox to Proxmox

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Nowadays virtualization is a must but sometimes we found virtual machines runing in several plataforms. Having all your virtual machines in one platform helps you to centralize all the administration and reduces maintenance time cost. In this case we have a Centos 7  pet virtual machine and we need  to migrate from  VirtualBox 6 to […]

Windows

Windows 2019 Server Can not access to a samba share

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Windows Server 2019 comes with a secure default config, in this case one Windows 2019 needs access to a samba public share and gives error 0x80004005 when we try to reach the shared folder. Solution: Open Regedit navigate to HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters\ and set value to 1 in key AllowInsecureGuestAuth

Proxmox

Configure Proxmox 5.2 mail notifications using a relay mail account

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Proxmox is a good solution for small  bussines, you will get an hypervisor with scheduled backups. In some costumers we found problems receiving backup notifications, because isp network is blacklisted, proxmox server domain name is not well configured, trafict through port 25 is filtered and hundreds of small problems In this cases the faster solution […]

MySql

Start a Percona 5.7 cluster after a controlled shutdown

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In each node check the content of /var/lib/mysql/grastate.dat version: 2.1 uuid: 9a50c4ec-4332-11e8-8b88-77564bb9f22a seqno: 45 safe_to_bootstrap: 0 select the node with the highest value in seqno and edit the value of safe_to_bootstrap to 1 should be like these version: 2.1 uuid: 9a50c4ec-4332-11e8-8b88-77564bb9f22a seqno: 45 safe_to_bootstrap: 1 in these node run systemctl start mysql@bootstrap.service in the other […]