Backup in virtualized enviroment is mostly based on snapshoting entire virtual machine and saving this state to backup repository. This snapshot does not include memory of virtual machine. When you restore virtual machine from this snapshot filesystem is in unclean state, but journal filesystem can handle this. From mysql point of view server crash happended and database can be corrupted and unrecoverable, depending on what queries where running during snapshot. This unpredicted and unconsistent state you don’t want to have as a backup of your data. Continue reading
I have been searching for simple and easy script to backup selected virtual machines running on esxi server, which will:
- run on linux – do not require windows machine; can’t use PowerCLI
- do not require direct access to esxi host using ssh (as other backups scripts like ghettoVCB.sh do) and will use API
- support multiple esxi hosts managed by vcenter
- have clear code – that means no perl hell (including big vsphere perl sdk)
- have short code
- can be put into cron
There are many sites providing country blocklists, for example http://www.ip2location.com/free/visitor-blocker or https://www.countryipblocks.net/. When you want periodicaly update such list, you have problem. You need pay for that service for automated access, actual data or “hack” access to that service (abuse their free access conditions)…
Are you getting angry when installing Debian and your network cards (eg. bnx2) are not working because of missing non-free firmware policy? Solution is simple – just use for installation unofficial Debian iso images with firmware. Continue reading
Everyone know common dns blacklists used for rejecting emails. To check, if ip address is blacklisted on some blacklist, it is common to use service like mxtoobox.com. But what check next, if mxtoolbox shows ip is not blacklisted and email or connections are still rejected (sometimes without any reason) by some servers?
There seems to be increased spam activity last few days. Both rejected connections and marked SPAM has increased on our systems.