On: Duplicate SSH Keys Everywhere

[korethr]

It would not surprise me if there are other bits of unique info on the template VM that need to be cleared before freezing the image, e.g. hostnames.

This is a solved problem in Windows. The sysprep tool wipes out the hostname, security keys, user accounts and a bunch of other things one can configure, so the image initializes properly the first time it's booted.

I am curious if there are similar tools for Linux & Unix that the image builders simply failed to use here, or if this points to an opportunity to build a useful tool.

[mintplant → korethr]

There's virt-sysprep [1] and sys-unconfig [2].

[1] http://libguestfs.org/virt-sysprep.1.html

[2] http://linux.die.net/man/8/sys-unconfig

[pliu → korethr]

cloud-init

https://cloudinit.readthedocs.org/en/latest/

[kordless → pliu]

+1

[verbatim → korethr]

virt-sysprep from libguestfs does this.

http://libguestfs.org/virt-sysprep.1.html

[warrenm → korethr]

in VMware, you use Customization Specifications to do the equivalent to sysprep for Linux (and sysprep on Windows VMs)