[Info-vax] Distributed Applications, Hashgraph, Automation

[Kerry Main]

> -----Original Message-----
> From: Info-vax [mailto:info-vax-bounces at rbnsn.com] On Behalf Of
> Stephen Hoffman via Info-vax
> Sent: February 24, 2018 7:10 PM
> To: info-vax at rbnsn.com
> Cc: Stephen Hoffman <seaohveh at hoffmanlabs.invalid>
> Subject: Re: [Info-vax] Distributed Applications, Hashgraph,
Automation
> 
> On 2018-02-24 20:52:20 +0000, Kerry Main said:
> 
> > Never been much of an issue if its just the OS (modparams) and TCPIP
> > (tcpip$config).
> 
> No, it's not.   Go try it.  We'll wait.
> 

If just changing the node name and the TCPIP address as part of a new OS
deployment (e.g. gold image deployment - what we are talking about
here), then this is not a big deal. 

Done it many times.

> > If Apps involved, then it does get a bit more tricky, but that is
the
> > same on *NIX and Windows as well.
> 
> When are apps not involved in a deployment?
> 

In most cases I have been involved with, you deploy apps after the OS.
Ideally, not on the system disk but we all know there are poorly written
Apps that expect to be on the system disk.

In fact using todays concepts, you deploy the OS image and "App
containers" separately on non-system disk partitions. Just need to
change a few start-up items.

> > Its certainly not a show stopper.
> 
> Given that host names and DNS forward and reverse translations are all
> involved with network security, don't bet on that.
> 

The topic here is changing the server name and IP address of a new gold
image deployment.

Regardless of how the server is deployed, the network implications like
DNS AND FW rules still need to be addressed, but this also applies to
VMware Windows/Linux images using templates. 

Btw, one idea that HP internal IT was talking about doing just before I
left in 2012 was deploying gold images based on a server based DHCP
strategy for each NIC with long TTL's e.g. 5 days. 

Interesting idea, but I am not sure if they followed through on this or
not.


Regards,

Kerry Main
Kerry dot main at starkgaming dot com